PAGE 20 n tt nghip B mn Khai thc Hm l

LI NI U

Trong qu trnh cng nghip ho, hin i ho t nc, ngnh than c coi l mt trong cc ngnh kinh t mi nhn. Ngnh cng nghip khai thc than cung cp nguyn, nhin liu cho rt nhiu ngnh cng nghip ch cht khc nh: in lc, ha cht, luyn kim, xi mng. Ngoi ra than cn c xut khu em li ngun li nhun ln cho t nc, v l ngun cht t phc v cho sinh hot i sng ca nhn dn.

Thy r c tm quan trng ca ngnh than, trong nhng nm qua, ng v Nh nc ta to iu kin cho ngnh u t rt nhiu cc trang thit b, c bit l vic o to bi dng i ng cn b cng nhn p ng yu cu sn xut than cho t nc.

Sau qu trnh hc tp ti trng i hc M - a cht H Ni, em c cc thy, c trang b nhng kin thc c bn cng nh c tm hiu, nghin cu v ngnh khai thc m ni chung v ngnh khai thc m Hm L ni ring. c s phn cng ca nh trng em c v thc tp tt nghip ti cng ty than Vng Danh v c giao ti vi ni dung thit k nh sau:

Phn chung: Thit k m va v khai thc khu II - Cnh g, m than Vng Danh t mc +135 n mc 0 m bo sn lng 1,5 triu tn/nm

Phn chuyn : La chn cng ngh khai thc hp l cho cc va than ca khu vc thit k m bo sn lng 1,5 triu tn/nm

c s hng dn nhit tnh ca thy gio ThS. L Quang Phc em hon thnh n tt nghip c giao. Tuy nhin do thi gian v trnh c hn nn n chc chn cn nhiu sai st v ni dung cng nh hnh thc. V vy em rt mong nhn c s ch dn ca cc gio vin cng nhng kin ng gp ca cc bn ng nghip bn n c hon chnh hn.

Em xin trn trng gi li cm n thy gio ThS. L Quang Phc cng tp th cc thy c gio B mn Khai thc Hm l gip em rt nhiu trong sut qu trnh lm n.

Em xin trn trng cm n!H Ni, ngy 28 thng 03 nm 2014Sinh vin thc hin:

L Khnh ThinChng Ic im v iu kin a cht khu m

I.1.a l t nhin

I.1.1.a l ca vng m, khu vc thit k, sng ngi, i ni, h thng giao thng vn ti, ngun nng lng v nc sinh hot.

- M than Vng Danh nm pha Bc Th x Ung B tnh Qung Ninh, c th m v tr nh sau:

- To khu m:

X : 106045'30'' ( 106049'18'' - kinh ng

Y : 21007'12'' ( 21009'00'' - v Bc

- Din tch khu m: 14km2, chiu di theo hng ng Ty l 7km, chiu di theo hng Nam - Bc 2km.

- M c chia lm 3 khu khai thc:

* Khu ng Vng Danh t l xuyn va +122 n phay F1 di 2,5 km

* Khu Cnh g Vng Danh t phay F8 n F13 di 2,5 km

* gia l khu Ty Vng Danh.

+ Pha ng m gip m than Ung Thng, c phay F1 l ranh gii.

+ Pha Ty m gip m than Nam Mu (Than Thng), c phay F13 l gianh gii.

+ Pha Bc m l ng phn thu dy Bo i.

+ Pha Nam m l khu vc mt bng cng nghip m.

- Khu m nm khu vc c i ni cao trung bnh v kh dc, cao trung bnh t 300 (350 m. Trong phm vi bin gii ca m khng c sng ngi chy qua, ch c cc con sui phn nhnh bt ngun t dy ni Bo i chy theo hng Bc Nam ra sui Vng Danh. Cc sui u nng, vo ma kh t nc, lng sui dc v hp.

- T trung tm m chy tri di ra n trung tm th x Ung B theo ng t c b tng ho l 12km. C tuyn ng st rng 1000mm chy t khu nh sng m n cng in Cng di 17km. Mt khc t th x Ung B i H Long hoc t Ung B n H Ni c tuyn ng quc l 18A v quc l 10, t Ung B i Hi Phng v i Thi Bnh - Nam nh,... c quc l 10. Ngoi ra cn c tuyn ng st chy t thnh ph H Long qua ga C th x Ung B n H Ni,... V ng thu c sng Bc, nh thun tin xy dng cng bn, m xy dng cng ti x in Cng v c tn l cng in Cng, Cng ty than Vng Danh xut i trong ni a,v cc nc hng triu than tn mi nm qua cng in Cng.

Hin nay Cng ty c nh my sng tuyn than p ng c s lng v cht lng than theo yu cu cung cp cho nh my nhit in Ung B, nh my xi mng Lam Thch v xut khu.Ngun in nng (nng lng) ca m hin nay ang dng c ly t li in quc gia, t ng dy 35KV, qua bin th trung tm ca m xung 6KV cung cp cho m.

Nc sinh hot c ly t trm s II v 3 ging khoan cung cp cho khu tp th cng nhn, dn c trong vng ch yu dng nc ging khi.

I.1.2.Tnh hnh dn c, kinh t v chnh tr khu vc thit k.

Dn c trong vng ch yu l dn tc Kinh v dn nhp c, mt s l ngi dn tc nh: dn Sn Du, dn tc Dao h sng tp trung thnh lng bn xung quanh khu vc tr trn Ln Thp gn st cc sn i ni. Ngh nghip ca ngi dn y ch yu l cng nhn phc v cho cc m, X nghip khc nhau vi cc ngnh ngh khc nhau. Ngoi ra cn mt s dn lm ngh nng nghip v lm ng nghip hoc phc v bun bn dao dch t do.

V chnh tr: ngi dn lun i theo ch x hi ch ngha, lun lm vic v sinh sng theo ng ni chnh sch ca ng v Nh nc ra.

V kinh t: do ngy cng c i mi v cng ngh khai thc cng nh trnh tri thc vn ho ngy cng c nng cao, nn kinh t trong vng ngy cng pht trin, i i vi s pht trin ca ngnh than.

I.1.3. iu kin kh huM than Vng Danh thuc vng ni cao li gn bin nn kh hu mang tnh nhit i, hng nm c 2 ma r rt: ma ma v ma kh.

Ma kh t thng 11 n thng 4 nm sau, nhit trung bnh t 10 n 16 , thp nht l 5 .

Ma ma t thng 5 n thng 10 hng nm, nhit trung bnh t 25 n 30 , cao nht ln ti 39 .

Ma h c gi ng Nam, tc gi trung bnh 3,1 m/s, ma ng c gi ma ng Bc tc gi trung bnh 4,2 m/s.

Lng ma hng nm thng t 2400 - 2700mm, do lng ma ln hn lng bc hi nn m tng i ln.

I.1.4. Qu trnh thm d v khai thc khu m

Cng vi khong sng Vng Danh, khu Cnh G t trc ti nay c thm d qua nhiu giai on. Ngi Php thm d v khai thc t nm 1914 n nm 1953. T ngy ho bnh lp li, qu trnh thm d v lp bo co nh sau:

- Bo co thm d khu Hng Qung nm 1962.

- Bo co thm d t m khu Ty Vng Danh nm 1965.

- Bo co a cht kt qu cng tc thm d b sung khu Cnh G nm 1966.

- Bo co kt lun b sung v tr lng l bng khu Vng Danh t +122 ln l va nm 1970.

- Bo co trung gian thm d t m khu Vng Danh nm1976.

- Bo co thng tin khu ng Vng Danh nm 1983.

- Bo co thng tin thm d b sung l bng +135 khu II Cnh G nm 1985.

- Bo co trung gian kt qu thm d a cht mc -150 khu Vng Danh (phn khu Vng Danh, phn khu Cnh G, phn khu Ung Thng) nm 1994.

- Bo co a cht kt qu thm d khai thc phc v xung su mc +50 khu trung tm m than Vng Danh nm 1997.

- Bo co ti xy dng c s d liu a cht v nh gi tr lng kinh t m Vng Danh do cng ty pht trin Tin hc - Cng ngh v Mi trng (IT&E) nm 2001.

- Bo co tng hp ti liu a cht khu Cnh g - m than Vng Danh-Ung B - Qung Ninh do Cng ty a cht m lp nm 2004, tr lng tnh n 31/12/2003.

I.2. iu kin a cht

I.2.1.Cu to a cht vng m

a.a tng.

a tng khu Cnh g - m Vng Danh bao gm trm tch h Trias thng thng bc Nori-rti ip Hn Gai (T3n-r hg) v trm tch t. Trm tch h Trias thng thng bc Nori-rti ip Hn Gai phn b trn ton din tch khu m gm:

1. Ph ip di (T3n-r hg1)

Phn b thnh di nh hp, chy di theo phng ng Ty, c chiu dy khong 130m. t ch yu l cui kt, ct kt, bt kt.

2. Ph ip gia (T3n-r hg2)

Phn b thnh di chy di theo sn ca dy Bo i. Ph ip gia c chiu dy t 700 ( 1000m, bao gm cc loi t cui kt, sn kt, ct kt, st kt v cc va than. Nm trong a tng ny c mt cc va than t 1 n 11. Ph ip gia c chia thnh 3 tp.

- Tp th nht: (T3n-r hg12): t ch yu l ct kt, bt kt mu xm tro, c cha t 1( 3 va than chiu dy mng, khng n nh. Khng c gi tr cng nghip.

- Tp th hai: (T3n-r hg22): T vch va 3 n vch va 8. t ch yu l ct kt, bt kt, cc lp sn kt thng mng v khng duy tr. Tp hai cha 8 va than v phn va, y l i tng chnh ca cng tc thm d v khai thc.

- Tp th ba (T3n-r hg32): t ca tp ny ch yu l ct kt v cc ht th nh sn kt, cui kt. Trong tp ny c cha t 1( 3 va than mng, khng c gi tr cng nghip.

3. Ph ip Hn Gai trn (T3n-r hg3)

Phn b phn nh ca dy Bo i. t ch yu l cui kt, sn kt v xen k l cc lp bt kt, ct kt mng.

4. Trm tch t (Q):

Tt c din tch m u c ph bi mt lp v phong ho gm cui, si, sn, ct, st b ri c mu vng nu hoc xm nu, chiu dy ca lp ph t ny khong t 1(20m.

b.Kin to

Khu Cnh G l mt phn din tch thuc cnh nam ca np lm Bo i, cm n nghing v bc vi gc dc thay i t 150 (500. Vi s tn ti cc t gy, un np th hin khu m c cu trc a cht phc tp v c cc nh a cht trc y xp m vo nhm m loi III.

1.H thng np un:

Khu m Vng Danh c 5 np un chnh, trn cc np un chnh c cc np un nh mang tnh cc b. Cng xung su gc dc cc cnh un np cng thoi dn.

M Cnh G c hai np un ln, np li ty Cnh G v np lm ng Cnh G nhng do cc h thng t gy v cc np un th cp lm cho hai np un ny tr nn phc tp.

* Np li Ty cnh g:

C phng trc bc nam gn trng vi tuyn IX u trc pha bc chc xung, gc dc ca hai cnh khng n nh, cnh pha ty dc hn cnh pha ng , dc thay i t 15o( 45o. Trn hai cnh tn ti nhiu np un nh cc b, thm ch c c np un o, khng duy tr, cng xung su th np un cng b xo nho.

* Np lm ng cnh g:

C phng trc ng Bc - Ty Nam gn trng vi tuyn 10 v tuyn 66B. Hai cnh khng cn xng, cnh pha ty c dc thay i t 25 ( 35o, cnh pha ng c dc ln hn, thay i t 35 ( 600, np lm ny b hai t gy ct qua hai cnh l t gy F10 cnh ty v F40 cnh ng.

2. Mng li t gy:

Khu Cnh G b phn ct thnh nhiu khi kin to ngn cch nhau bi cc t gy. Cc t gy y pht trin theo dng to tia: chm li pha nam v to ra pha bc nh dng cnh cy. Da vo mc lin quan, kh nng nh hng v cng hot ng c th ghp thnh ba h thng chnh sau:

+ H thng t gy F12 (pha ty) gm: F13, F12, F11, F11A.

+ H thng t gy F10 gm: F10B, F10A, FN20, F40.

+ H thng t gy F8 (pha ng): F9, F8, F7, F6 (F7, F6.

Trong cc h thng t gy ny vi cc t gy chnh nu trn cn nhiu cc t gy nh sinh km, c t gy c pht hin v kh nng cn nhiu t gy cha c pht hin do c ly dch chuyn nh.

c im ca cc nhm t gy trn xem bng I - 1

Bng I.1. c im ca cc nhm t gy.

STTTn t gyTnh cht t gyTh nm mt trtC ly dch chuyn

1F.13Thun2700(2750(100(15050( 100m

2F.12Nghch1100(1200(450(600100(400m

3F.11Nghch1300(1350(400(5001(60m

4F.11ANghch1400(1800(500(6001( 20m

5F.10BNghch1150(1200(400(50030( 150m

6F.10ANghch1200(1300(400(50020( 150m

7F.N20Nghch2000(100(15020( 80m

8F.40Thun1600(600(75010( 60m

9F.9Nghch850(950(700(80010( 60m

10F.8Nghch850(1150(700(800200( 400m

I.2.2. Cu to cc va than

* Va 4: C chiu dy khng n nh, thay i t 0.33m n 9.97m trung bnh 2.6 m

Va 4 thuc loi va c cu to phc tp, va c t 1 n 9 lp kp, ph bin t 2 n 8 lp kp. Chiu dy cc lp kp thay i t 0,01 n 0.87mt, trung bnh 0.23 m

tro ca va trung bnh: 23.51%.

* Va 5: C chiu dy khng n nh, thay i t 0.65m n 13.5m trung bnh 6.5 m

Va 5 thuc loi va c cu to phc tp, va c t 1 n 16 lp kp, ph bin t 2 n 16 lp.

Chiu dy cc lp kp thay i t 0,01 n 1.81 mt, trung bnh 0.28m

tro trung bnh ca va: 20.69%

* Va 6: C chiu dy khng n nh, thay i t 1.27m n 9.08m trung bnh 3.4 m

Va 6 thuc loi va c cu to phc tp, va c t 1 n 06 lp kp, ph bin t 1 n 5 lp.

Chiu dy cc lp kp thay i t 0,01 n 1,03 mt.

tro ca va trung bnh: 19.37%

* Va 7: C chiu dy khng n nh, thay i t 0.57m n 26mm trung bnh 7.6 m

Va 7 thuc loi va c cu to phc tp, va c t 1 n 18 lp kp, s lng lp kp gim dn t Ty sang ng. Chiu dy cc lp kp thay i t 0,01 n 2.27 mt, trung bnh 0.24m.

tro ca va trung bnh: 13.42%

* Va 8: C chiu dy khng n nh, thay i t 0.16 m n 7.99m, trung bnh: 2.5 m

Va c t 1 n 4 lp kp, chiu dy lp kp thay i t 0.01 n 1.79m, trung bnh 0.39m

tro trung bnh ca va: 15.55%

* Va 8a: C chiu dy tng i n nh, thay i t 1.03m n 11.55m, trung bnh: 2.7m

Va c t 1 n 4 lp kp, chiu dy lp kp thay i t 0.01n 1.24m, trung bnh 0.26m

Chiu dy va gim dn t Ty sang ng, t nng xung su.

tro trung bnh ca va: 15.37%.

I.2.3. Phm cht than

a) Tnh cht c l v thch hc ca than.

Than Vng Danh c mu en nh kim loi, than cng gin, c kin c f =1(3, t trng (1,5(1,67)T/m3. Tnh cht ca than tng i n nh. Hm lng trung bnh v tro ca than thp, thnh phn tp cht nh.

b) Thnh phn ca than.

Than Vng Danh thuc loi antraxit dng lp hoc khi bin cht cao, khng khi, t tp cht.

Bng I.2. Phm cht than cc va khu cnh g.

Tn va

Th t tro(%) m (%)T trng (T/m3)Cht bc (%)Nhit lng (Kcal/Kg)

1-va 413,04(094,37(5,501,584,57(5,748000(8160

2-va 510,37(10,74,64(4,791,675,12(8,067940(8070

3-va 68,45(17,674,79(5,281,674,38(4,698030(8129

4-va 76,82(12,674,97(5,541,602,59(4,67037(8160

5-va 810,9324,681,653,788134(8217

6-va 8a7,4(11,64,9(5,11,674,28342

I.2.4. a cht thu vn

a) Nc mt.

Khu m Vng Danh c tng din tch b mt l 14Km2, phm vi khu m khng c cc sng ln v h cha nc m ch c h thng sui nh v va chy qua ri hp thnh con sui ln, chy ra sng Ung B. Ngun cung cp nc mt ch yu l nc ma, theo ti liu quan trc thu vn cho thy lu lng tng hp cc sui chnh l Qmax = 0,04 m3/s, Qmin = 0,015 m3/s. Nc vng l loi nc hi cng, c t tp cht trong nc.

b) Nc ngm.

Qua o c a cht thu vn cho thy, tng cha nc trong khu m gm 3 phc h ch yu:

Phc h cha nc nm trong t t, thuc loi mng h thp, lu lng nc < 0,001 m3/s, nc ngm nm trong tng ny khng nh hng n khong sng, ngun cung cp nc ch yu l nc ma v n c thi ra theo mng sui cung cp cho nc mt.

Phc h cha nc nm trong t Triat-Juna, c phn b khp khu m, ngun cung cp nc ch yu l nc mt, tng lu lng nc ln nht vo ma ma l 0,734 m3/s, nh nht vo ma kh l 0,047 m3/s.

Phc h cha nc nm trong t Triat-trung h, lu lng nc nh khong 5.10-5m3/s, l tng cha nc tt nht y tng cha than.

Nc y c tnh cht axit yu (PH = 6(7), nc hi cng, nhit nc 23(34oC.

I.2.5. a cht cng trnh

a. Tnh cht c l v thnh phn ca t .

Cu to a cht khu m Vng Danh gm cc loi : sn kt, st kt, ct kt v cc lp than trm tch xen k nhau, cu to phn lp tng i n nh. Nm st cc va than thng l nhng lp st kt hoc st than cch nc v thm nc km. Ct kt c ht thay i t mn n th, cu to rn chc, c h s kin c f = 6 ( 9, t trng 2,67 T/m3. Bt kt cu to phn lp mng n trung bnh, h s kin c f = 5 ( 7, t trng 2,58 ( 2,63 T/m3. St kt cu to lp, cch nc v thm nc km, h s kin c f = 4 ( 6, t trng 2,56 T/m3.

b. Cc hin tng a cht cng trnh.

Khu m c a hnh i ni phn lp mnh, nhiu phay ph un np to nn cc mt trt, cc i v nhu t vi khong sn gy nn nhng kh khn trong cng tc thm d, xy dng v bo v cc cng trnh m. Lp t ph t phn lp khng u, a hnh dc nn thng xy ra cc hin tng trt n t cc sn ni, khe sui v ta luy cc cng trnh khi o.

I.2.6. Tr lng

Tng tr lng a cht cho phn khai thc l ging tnh n 31/12/2004 l: 76101.13 ngn tn than

Trong :

+Tr lng cp C1: 29 631.57 tn chim 38.9%

+Tr lng cp C2: 46 469.55 tn chim 61.1%

Theo nh gi tr lng khu II Cnh G t mc +135 n 0 l khong :15,8 triu tn

I.3. Kt lun

Qua phn tch c im a cht khu vc Cnh G v iu kin a cht khu vc, ta thy nhng thun li v kh khn khi thit k m va v khai thc nh sau:

V iu kin thun li: v tr khu vc thun li cho cng vic cung cp vt t, thit b ng lc, vn chuyn than v cc cng vic xy dng mt bng cng nghip. C ngun cung cp nhn lc ln, trnh vn ho dn tr cao. Khu vc thit k tng i cao, d dng cho vic thot nc v vn ti. Cu to va than tng i n nh, cht lng than tt.

V mt kh khn: a hnh a cht m phc tp, c nhiu phay ph phc tp cc b, c ni c kh CH4, CO2, H2 cao nn trong qu trnh khai thc rt kh khn, thng gi phi tt. Do a hnh cao nn vic m ng, san gt mt bng cc ca l cng tng i nhiu.

Vi nhng thun li v kh khn nh vy, m c nhiu ti liu thm d a cht tng i chnh xc nn c nhng bin php ph hp phc v cho sn xut than.

Chng ii

M va v chun b rung m

II.1. Gii hn khu vc thit k

II.1.1. Bin gii khu vc thit k

Khu Cnh g cng ty than Vng Danh c phn chia thnh 3 khu vc khai thc theo cc t gy kin to a cht nh sau:

- Khu I (Cnh g I), t t gy F.8 n t gy F10B;

- Khu II (Cnh g I +Cnh g II), t t gy F10B n t gy F.12;

- Khu III (Cnh g II). t t gy F.12 n t gy F.13.

Khu vc thit k thuc khu II Cnh g, phm vi khai trng khai thc khu II Cnh G nh sau:

-Pha bc gii hn bi ng nh hng trn mt a hnh khi khai thc va 8a

-Pha ng gii hn bi t gy F10B

-Pha ty gii hn bi t gy F12

-Pha nam gii hn bi l va va va 4

II.1.2. Kch thc khu vc thit k

Chiu di theo phng bnh qun ca cc va trong khu vc thit k l 1400m.

su khai thc t +135 n 0.

II.2. Tnh tr lng

II.2.1. Tr lng trong bng cn i

Tr lng trong bng cn i l tr lng m trong iu kin a cht, iu kin kinh t v k thut hin ti khai thc chng c hiu qu.

Cn c vo cc c im a cht khu vc thit k ta thy cc va than: V4, V5, V6, V7, V8, V8a u c cht lng than tt, cc thng s chiu dy, gc dc ca cc va u m bo v mt k thut khai thc trong thi im hin ti. Vic khai thc cc va ny trong thi im hin nay s mng li hiu qu kinh t nht nh, do tr lng trong bng cn i chnh l tr lng a cht tnh cho cc va trn.

Tr lng a cht ca cc va than c xc nh theo cng thc sau:

Zc = , tn.

(II.1).Trong :

LP: Chiu di theo phng ca cc va, m;

H: Chiu cao thng ng ca khu vc tnh tr lng, m;

: Gc dc trung bnh ca cc va than, ;

M: Chiu dy trung bnh ca cc va than, m;

(: Trng lng th tch ca than, tn/m3.

Theo cng thc (II.1) ta s tnh c tr lng a cht cho cc va than trong khu vc thit k, kt qu tnh ton c th hin trong bng II.1 di y.

Bng II.1. Tr lng a cht khu II cnh g t mc +135

EMBED Equation.3 0.

TTTn vaChiu di theo phng, Lp, mChiu cao thng ng, H, mGc dc trung bnh, , Chiu dy trung bnh va, M, mTrng lng th tch than, , tn/m3Tr lng a cht, Zc, 103 tn

1Va 41400135322.61.631511517.04

2Va 51400135316.51.633887974.69

3Va 61400135333.41.631923178.35

4Va 71400135287.61.634987164.69

5Va 81400135272.51.631696456.2

6Va 8a1400135272.71.631832172.7

7Tng-----15838463.7

II.2.2. Tr lng cng nghip

L tr lng c th khai thc c t tr lng trong bng cn i tr i cc loi tn tht.

Tr lng cng nghip c xc nh theo cng thc:

Zcn = Zc . C, tn

(II.2).

Trong :

Zc: Tr lng a cht trong bng cn i;

C: H s khai thc C = 1 0,01 Tch;

Tch: Tn tht chung: Tch = ttr + tkt;

ttr: Tn tht do li tr bo v ttr = 0,5 2% ly ttr = 2%;

tkt: Tn tht trong qu trnh khai thc tkt = 5% 12%% ly tkt = 10%.(do cc va thuc loi dc thoi v dc nghing);

Vy Tch= 2% + 10% = 12%;

Vy C = 1 - 0,01.12 = 0,88.

Thay s vo cng thc II.2 ta c:

Zcn = 15 838463,7x 0,88 = 13 937848 (tn).II.3. Sn lng v tui m

II.3.1. Sn lng m

Theo k hoch c giao, sn lng khai thc khu II cnh g cng ty than Vng Danh l 1500000 tn/ nm.

II.3.2. Tui m

Tui m l thi gian tn ti ca m v c xc nh theo cng thc sau:

Tm = , nm

(II.3).

Trong :

Zcn: Tr lng cng nghip, Zcn = 13 937848 tn;

Am: Sn lng m, Am = 1500000 tn/nm.

Thay vo cng thc (II.3) ta tnh c tui m ca khu vc thit k nh sau:

Tm = = 9,3(nm).

Ta ly Tm = 10 nm.

Nu ta tnh c thi gian xy dng v khu vt th tui m thc t l:

Ttt = Tm + t1 + t2 nm;

Trong :

Tm: Tui m tnh ton,

t1: Thi gian xy dng c bn; t1 = 3 nm,

t2: Thi gian khu vt, t2 = 3 nm.

Vy tui m thc t l:

Ttt = 10 + 3 + 3 = 16 (nm).

II.4. Ch lm vic ca m

Ch lm vic ca m c vai tr quan trng trong qu trnh hot ng ca m, n quyt nh n nng sut lao ng, i sng vn ho, i sng tinh thn ca cn b cng nhn vin chc ca m.

II.4.1. B phn lao ng trc tip

L b phn trc tip sn xut, lm vic 3 ca mt ngy, mi ca 8 ting, mi thng lm vic 26 ngy, ngh ngy ch nht, cc ngy l v ngy tt. Mt nm lm vic 300 ngy, ht mt tun o ca mt ln.

B phn trc tip tham gia lao ng sn xut cng vi dy truyn phc v tham gia gin tip ca m lm vic 3 ca trong 1 ngy m sp xp thi gian theo bng II.2. di

BngII.2: Thi gian lm vic theo ca.Ca sn xutMa h (Gi)Ma ng(Gi)

Ca17h-:-15h7h30-:-15h30

Ca215h-:-23h15h30-:-23h30

Ca323h-:-7h23h30-:-7h30

sp xp thi gian lm vic v ngh hp l cho cc nhm cng nhn m bo sc kho v nng cao nng sut lao ng, ta b tr s o ca nghch nh bng II.3.

Bng II.3: Ch i ca.

T sn xutTh 7Ch nhtTh 2S gi ngh

CaICaIICaIIICaICaIICaIII

AANghA56

BBB32

CCC32

II.4.2. B phn lao ng gin tip

B phn lao ng gin tip ca m lm vic 8 gi mt ngy, tun lm vic 5 ngy, ngh th 7 v ch nht.Gi lm vic:Bui sng: t 7h30 11h30.Bui chiu:t 12h30 16h30.II.5. Phn chia rung m

II.5.1. Phn chia rung m thnh cc tng

Cn c theo c im a cht cc va v gii hn khu vc thit k c giao t mc +135

EMBED Equation.3 0, n la chn phng php phn chia rung m theo tng. Rung m c chia lm 2 tng: tng I t mc +135 +67, tng II t +67

EMBED Equation.3 0. Vi gc dc trung bnh ca cc va l 300 ta s tnh c chiu cao theo hng dc ca mi tng l 135 m.

II.5.2. Kch thc khu khai thc

Khu cnh g m than Vng Danh c chia lm 3 khu khai thc theo cc t gy. Khu vc thit k thuc khu II gii hn bi cc phay F10B v F12 vi chiu di trung bnh theo phng ca cc va l 1400m.

II.6. M va

II.6.1.Khi qut chung

a.Khi nim

M va cho rung m l vic o cc ng l t mt t n va khong sng. Cc ng l ny m bo kh nng o cc ng l chun b tin hnh khai thc khong sn.

Vic la chn hp l s v phng php m va rung m c ngha rt quan trong i vi vic tng cng sut sn lng m, v cc hot ng sn xut ca x nghip. Bi n quyt nh thi gian, quy m vn u t c bn cn thit cng nh cng ngh trong sn sut, nh hng trc tip n vic p dng khoa hc k thut vo sn xut.

Phi da vo cc yu t nh chiu dy va, gc dc, tnh cht c l ca than, tnh cht ca tr, vch, cha nc xung quanh, cn c vo tui m, sn lng, kch thc rung m la chn phng php m va hp l nht p ng cc yu cu v k thut cng nh v kinh t.

Ngoi cc yu t trn, trong qu trnh thit k phng n m va phi m bo cc yu t sau:

- a vo khai thc sm nhng tr lng c tin cy cao, than c cht lng tt, iu kin khai thc thun li. Thi gian xy dng m ngn, tn tht than t v c kh nng i mi cng ngh

- Khi lp phng n khai thng c tnh n s ph hp v ng b tn dng cc cng trnh hin c gim vn u t, dy chuyn cng ngh vn ti than t khu khai thc v sn cng nghip v nh my tuyn gn nht, n gin nht.

- Thun tin trong vic ng dng cc cng ngh c gii ho cho nng sut cao, vi cc khi a cht c chiu di theo phng khng ln th khai thng chun b khai thc l ch 1cnh.

- m bo thng gi thng sut v c hiu qu.

- Ph hp vi quy hoch khai thc lu di ca m v ca vng.

- Khi lng u t nh nht m vn m bo an ton v sm ra than.

m bo cc yu cu trn l mt vn kh khn phc tp do la chn phng n m va l hp l ta cn so snh nhiu yu t. Song hai yu t c bn l yu t k thut v kinh t ca cc phng n.

b.Cc yu t nh hng ti cng tc m va ca khu vc thit k

Cng tc m va chu nh hng rt ln bi cc yu t a cht, a hnh. Ngoi ra n cn ph thuc vo iu kin thc t ca khai trng sn xut.

Khai trng khu vc thit k bao gm cc va 4, 5, 6, 7, 8, 8a t mc +135 tr xung. T mc +135 tr ln v ang c khai thc, v vy m khu vc thit k chu nh hng nhiu ca nc ngm. Thm vo khu vc cn chu nh hng ca cc t gy chy qua.

II.6.2. xut cc phng n m va

a. xut mt s phng n m va

Sau khi nghin cu ti liu a cht, a hnh khu vc thit k n nhn thy khong sng Vng Danh c c im a cht l cc va than khu Cnh G nm chnh hp theo th t t trn xung bao gm cc va sau: va 8a, 8, 7, 6, 5 v va 4. Cc va u c hng cm ng-Bc, nm tng i gn nhau vi gc dc trung bnh khong 300. Trn c s cng vi vic nghin cu cc phng n m va m m ang p dng, n xin a ra mt s phng n m va c th p dng cho khu vc thit k nh sau:

Phng n I: M va bng ging nghing kt hp vi l xuyn va mc.

Phng n II: M va bng ging ng kt hp vi l xuyn va mc

b. Cc thng s m va c bn

* Xc nh chiu cao tng

Khu vc thit k gm cc va c dc nh n dc nghing, gc dc trung bnh ca cc va l 300, chiu di trung bnh theo phng ca cc va l 1400 m, gii hn theo hng dc t mc +135

EMBED Equation.3 0. n phn chia rung m thnh 2 tng khai thc: tng I t mc +135 +67; tng II t mc +67

EMBED Equation.3 0, khi chiu cao trung bnh theo hng dc ca mi tng s l:

Hd = 136 m ( tng I).

Hd = 135 m (tng II).

* Tnh chiu cao tr bo v

Trong qu trnh khai thc ta cn phi li cc ng l dc va vn ti lm l thng gi cho tng sau. Do bo v cc ng l ny ta cn phi li cc tr bo v. Chiu cao cc tr bo v c tnh theo cng thc sau:

Str = , m

(II.4).

Trong :

: Gc dc trung bnh ca cc va, ( = 300;

(: H s k n kin c ca than v tr ( = 1;

Lc: Chiu di l ch chn s b, Lc = 130 m;

H: Chiu su khai thc tnh t mt t, mc +135 ly H = 130 m, mc +67 ly H=200 m, mc 0 ly H = 270 m;

f- H s kin c ca vch f = 6.

Theo cng thc (II.4) ta tnh c chiu cao tr bo v ca cc tng khai thc cho tng va, kt qu tnh ton c th hin trong bng II.4 di y:

Bng II.4. Chiu cao tr bo v cc ng l.

Sttng l cn bo v(, (Lc, mH, mfChiu cao tr bo v, Str, m

1L +135300113013069,2

2L +673001130200611,4

3L 03001130270613,2

II.6.3. Trnh by cc phng n m va

A. Phng n I: M va bng ging nghing kt hp vi l xuyn va mc.

Ti mt bng mc +129,1 pha ty sui C i din vi mt bng +135 c a hnh thun li cho vic b tr mt bng cng trnh trn ming ging, khong cch vn ti than v sn cng nghip nh my tuyn Cnh g gn, u ni vi h thng vn ti ngoi, cung cp in, nc thun tin. Do vy t mt bng ct cao +129,1 tin hnh o cp ging nghing m va cho khu vc khai thc.Ging nghing chnh t bng ti ch than m t mt bng +129,1 n mc - 15 dc 140, chiu di 596 m. Ca ging c v tr to :

X= 37 744,58

Y= 373 900,04

Z= +129.10

( = 3140

Ging nghing ph trang b trc ti ch t , thit b, vt liu v ngi m t mt bng +129,1 n mc - 10 dc 180, chiu di 450 m. Ca ging c v tr to :

X= 37 770,48

Y= 373 925,05

Z= +129.10

( = 31401. S m va (Hnh III )

2. Trnh t o l

T mt bng ct cao mc +129,1 tin hnh m cp ging nghing chnh (1) v ging nghing ph (2) tip cn cc va than. Ging chnh bng ti c o n mc -15 vi gc dc 140, ging ph trc ti c o n mc - 10 vi gc dc 180. Ti chn ging mc 0 m h thng sn ga, sau tun t o ng l dc va trong mc 0 (4) vi tng chiu di 1513 m ri m ng ba r vo khu II. T ng ba ny tip tc m l xuyn va (3) khu II n va 8a vi tng chiu di 740 m khai thng cho khu II. Ti v tr giao ct gia l xuyn va mc (3) vi cc va than ta o cc l dc va vn chuyn mc 0 v hai pha ca rung m trong tng va than vi chiu di 100m. T cc ng l dc va ny tin hnh m ga chn thng, o thng vn ti t mc 0 ln mc +75 v thng thng gi t mc 0 ln mc +135 trong tng va. T cc l thng ny ti mc +67 v +135 tin hnh o l dc va vn chuyn v l dc va thng gi ca tng I v hai pha ra ti bin gii rung m sau tin hnh m l thng ct to l ch cho cc va tin hnh khai thc. Cc ng l dc va thng gi tng I mc +135 trong tng va c ni thng vi ng l xuyn va thng gi mc +135, ng l xuyn va thng gi ny c o t mt bng mc +135 thng gi chung cho ton khu vc khai thc.

Trong khi khai thc tng trn cng tc chun b s c tin hnh cho tng khai thc tip theo. chun b cho tng II ta tin hnh o l dc va vn ti ca tng mc 0 v hai pha ra ti tn bin gii ca rung m, sau m thng ct to l ch khai thc cho tng II. L dc va vn ti ca tng I s c gi li lm l dc va thng gi cho tng II, thng thng gi cng c gi li thng gi cho tng II, thng ny s c ni thng vi l xuyn va thng gi mc +135. Cng tc chun b ny nhm m bo khi kt thc khai thc tng trn c th thc hin khai thc ngay tng k tip.

3. Vn ti than v vt liu

a. Vn ti than

Than khai thc ra t cc l ch c vn chuyn bng mng co (i vi cc l ch c gc dc 250) xung l song song chn. Ti y than c rt qua hng so xung cc toa gong l dc va vn chuyn v c tu in c quy ko ti thng vn ti. Than tip tc c vn chuyn qua thng bng mng co hoc mng trt xung ga chn thng mc 0, sau than c h thng bng ti l xuyn va mc 0 v h thng bng ti l dc va trong mc 0 a ti sn ging. T sn ging than c a ln mt t bng h thng bng ti ging nghing chnh.

b. Vn ti t thi

Ti mc 0 t thi trong qu trnh o l c xc bc ln cc xe gong 3 tn, c ng 900 mm v c tu in c quy khi lng bm dnh 8 tn ko v ga chn trc sau c h thng trc ti ging ph a ln mt bng.

Ti mc +135 t thi t qu trnh o l c xc bc ln cc xe gong sau c ko ra ngoi ca l xuyn va +135 bng tu in.

c. Vn ti thit b v vt liu

G, vt liu chng l c a theo ng l bng mc +135 vo n cc ga u thng v c a xung mc +67, 0 bng ti trc hoc y th cng vo u cc l ch.

Thit b, vt t phc v sn xut c a xung sn ga chn trc mc mc 0 bng h thng trc ti ging ph v c tu in c quy khi lng bm dnh 8 tn, xe gong chuyn dng, c ng 900mm ch n ni tiu th.

d. Vn ti ngi

Mc 0: Cng nhn c a xung sn ga mc 0 bng h thng ti dy ging chnh v ging ph, t y chuyn sang cc toa xe chuyn dng loi 18 ch ngi v c tu in c quy ko n ni lm vic.

Mc +135: Cng nhn c h thng tu in mc +135 a n ni lm vic.

4. Thng gi

Theo quyt nh s 942/Q-BCN ngy 22/3/2007 ca B cng nghip, khu Cnh G - m than Vng Danh c xp hng I v xut kh m tan n mc -150. ph hp vi s khai thng, chun b, lch khai thc, hin trng thng gi v cp kh m n chn phng php thng gi chung cho ton m l phng php thng gi ht.

Gi sch vo qua ging ph trc ti v ging chnh bng ti xung thng gi cho khu vc sn ga mc 0, sau theo l dc va mc 0, n l xuyn va vn ti mc 0 Khu II, sau chia thnh cc nhnh i thng gi cho cc l ch:

- Tng I: T l xuyn va vn ti mc 0 Khu II, gi sch chia thnh cc nhnh vo l dc va mc 0, ga chn thng mc 0, ln thng thng gi ca tng va; n l dc va vn ti mc +67 ca tng; qua hng so; vo l song song chn; ln thng gi cho l ch. Gi thi t l ch ln l dc va thng gi mc +135 ca tng, cui cng n l xuyn va thng gi +135 ho vo lung gi thi chung ca ton m, thot ra ngoi qua trm qut t ti ca l +135.

- Tng II: Gi sch t l xuyn va mc 0 Khu II chia thnh cc nhnh ti cc va thng gi cho cc l ch ca tng va: T l xuyn va mc 0 Khu II, gi sch vo l dc va vn ti mc 0 ca tng, qua hng so, vo l song song chn, ln thng gi cho l ch. Gi thi t l ch theo l dc va thng gi mc +67 ca tng (ng l vn ti ca tng trn c gi li lm l thng gi cho tng di), qua thng thng gi ln l xuyn va thng gi mc +135 thot ra ngoi qua trm qut ti ca l +135.

5. Thot nc

Nc thot ra t cc a tng, cc ng l khai thc theo cc rnh nc c dc 50/00 chy vo hm cha nc mc 0 ti sn ging. T cc hm cha nc c bm ln mt t bng h thng my bm qua ging ph.

6. Khi lng ng l phng n I

Trong gii hn n ch tnh n cc ng l chnh, khi lng cc ng l c thng k c th trong bng II.5 di y:

Bng II.5. Khi lng ng l phng n I.

SttTn ng lS lng Tit din(m2)Chiu di(m)

1Ging nghing chnh112,0596

2Ging nghing ph120,1450

3Sn ging 0115,3300

4L dc va vn ti chnh 0 trong 116,81513

5L xuyn va mc 0115,3740

6Thng vn ti (0 +75)67,8900

7Thng thng gi, i li(0 +135)67,81620

8L xuyn va thng gi +135115,3900

9L dc va thng gi67,88400

10L dc va vn ti127,816800

B. Phng n II: M va bng ging ng kt hp vi l xuyn va mc.

T mt bng ct cao +129,1, pha ty sui C c a hnh thun li cho vic b tr mt bng cng trnh trn ming ging ta tin hnh o cp ging ng tip cn khong sng m va cho khu vc khai thc. Ta ca ging chnh v ging ph c xc nh nh sau:

Ging ng chnh t h thng thng trc skip vn ti than m t mt bng +129,1 n mc - 25, chiu di 154 m. Ca ging c v tr to :

X= 37 744,58

Y= 373 900,04

Z= +129.10

Ging ng ph t h thng thng trc tr ngi v vt liu m t mt bng +129,1 n mc - 25, chiu di 154 m. Ca ging c v tr to :

X= 37 770,48

Y= 373 925,05

Z= +129.10

1. S m va (Hnh V).

2. Trnh t o l

T mt bng ct cao mc +129,1 tin hnh m cp ging ng chnh (1) v ging ng ph (2) m va cho khu vc thit k khai thc. Ti chn ging mc 0 m h thng sn ga, sau tun t o ng l dc va mc 0 (4) trong vi tng chiu di 1890 m ri m ng ba r vo khu II. T ng ba ny tip tc m l xuyn va (3) khu II n va 8a vi tng chiu di 740 m khai thng cho khu II. Ti v tr giao ct gia l xuyn va mc (3) vi cc va than ta o cc l dc va vn chuyn mc 0 v hai pha ca rung m trong tng va than vi chiu di 100m. T cc ng l dc va ny tin hnh m ga chn thng, o thng vn ti t mc 0 ln mc +75 v thng thng gi t mc 0 ln mc +135 trong tng va. T cc l thng ny ti mc +67 v +135 tin hnh o l dc va vn chuyn v l dc va thng gi ca tng I v hai pha ra ti bin gii rung m sau tin hnh m l thng ct to l ch cho cc va tin hnh khai thc. Cc ng l dc va thng gi tng I mc +135 trong tng va c ni thng vi ng l xuyn va thng gi mc +135, ng l xuyn va thng gi ny c o t mt bng mc +135 thng gi chung cho ton khu vc khai thc.

Trong khi khai thc tng trn cng tc chun b s c tin hnh cho tng khai thc tip theo. Cng tc chun b cho tng II cng c tin hnh tng t nh phng n I nhm m bo khi khai thc xong tng I c th tin hnh khai thc ngay tng k tip.

3. Vn ti than v vt liu

a. Vn ti than

Cng tc vn ti than c tin hnh tng t nh i vi phng n I ch khc ch than c vn ti t sn ging ln mt bng nh h thng trc ti thng skp ging ng.

b. Vn ti t thi

Ging phng n I.

c. Vn ti thit b v vt liu

Tng t phng n I.d. Vn ti ngi

Mc 0: Cng nhn c a xung sn ga mc 0 bng h thng thng trc ging ph, t y chuyn sang cc toa xe chuyn dng loi 18 ch ngi v c tu in c quy ko n ni lm vic.

Mc +135: Tng t phng n I.

4. Thng gi

Khu Cnh G - m than Vng Danh c xp hng I v xut kh m tan n mc -150. n chn phng php thng gi chung cho ton m l phng php thng gi ht.

Gi sch vo qua ging ng ph v ging ng chnh xung thng gi cho khu vc sn ga mc 0, sau theo l dc va mc 0, n l xuyn va vn ti mc 0, cui cng chia thnh cc nhnh i thng gi cho cc l ch. Cng tc thng gi cho cc tng khai thc cng c tin hnh tng t phng n I.

5. Thot nc

Cng tc thot nc m c thc hin tng t phng n I .6. Khi lng ng l phng n II

Bng II.7. Khi lng ng l phng n II.

SttTn ng lS lng Tit din(m2)Chiu di(m)

1Ging ng chnh119,6154

2Ging ng ph124,6154

3Sn ging 0115,3300

4L dc va vn ti chnh 0 trong 116,81890

5L xuyn va mc 0115,3740

6Thng vn ti (0 +75)67,8900

7Thng thng gi, i li(0 +135)67,81620

8L xuyn va thng gi +135115,3900

9L dc va thng gi67,88400

10L dc va vn ti127,816800

II.6.4. Phn tch v so snh k thut gia cc phng n m va

la chn phng n m va ti u nht, n tin hnh phn tch so snh v mt k thut gia cc phng n. Trong gii hn n ch a ra mt s ch tiu chnh so snh, kt qu so snh c th hin c th trong bng II.9 di y

Bng II.9. Bng so snh k thut cc phng n m va.

Cc ch tiu so snhPhng n I

M va bng ging nghing kt hp vi l xuyn va mc Phng n II

M va bng ging ng kt hp vi l xuyn va mc

1. Khi lng san gt mt bngNh nhauNh nhau

2. Khi lng cc ng l m vaChiu di ging nghing ln nhng chiu di l dc va o trong tr nh hn

Chiu di ging ng nh nhng chiu di l dc va trong tr ln hn phng n I

3. Thi gian xy dng c bnNhanh hn so vi phng n II do thi cng ging nghing nhanh hnThi gian xy dng c bn lu hn do cng tc thi cng ging ng phc tp hn

4. Cng tc vn ti, thng gi, thot ncCng tc vn ti, thng gi, thot nc kh khn hn so vi phng n l dc va tng tngVn ti qua ging ng gi thnh ln hn so vi ging nghing. Thng gi, thot nc kh khn hn phng n l dc va tng tng

5. S lng cc ng l dc va trong , l xuyn va, l thngS lng cc ng l dc va trong v l xuyn va nh nhng khi lng l thng lnGing phng n I

6. Cng tc bo v cc ng lBo v ging nghing phc tp v tn km hn so vi ging ng. Thi gian bo v cc ng l lnChi ph bo v ging ng nh hn so vi bo v ging nghing. Thi gian bo v cc ng l ln

7. Tn tht thanTn tht than ln hn do phi li tr bo v ging nghing, tr bo v l thngKhng phi li tr bo v ging, ch li tr bo v cc l thng

8. Xy dng trm qutNh nhauNh nhau

9. Khi lng sn gingNh hn so vi phng n l dc va tngNh hn so vi phng n l dc va tng

10. Thi gian a m vo sn xutChm hn do ging c o ti mc +0 mi bt u a m vo sn xut

Ging phng n I

* Nhn xt: v mt k thut n nhn thy rng phng n I c nhiu u im hn phng n II . Do vy theo iu kin k thut n la chn phng n I lm phng n khai thng m va cho khu vc m c thit k .II.6.5. So snh kinh t gia cc phng n m vaTrong phn ny, n ch cp n cc danh mc chi ph chnh v khc nhau ca cc phng n m va tin hnh so snh kinh t gia cc phng n .II.6.5.1. Chi ph xy dng c bn

Chi ph xy dng c bn c xc nh theo cng thc sau:

Cxdcbi = ki . Li , 103

(II.5).

Trong :

Cxdcbi: Chi ph xy dng c bn ca ng l th i, ;

ki : n gi o 1m l ca ng l th i, /m;

Li: Chiu di ng l th i ; m.

Theo cng thc (II.5) ta s tnh c chi ph xy dng c bn cho tng phng n m va, kt qu tnh ton c th hin c th trong cc bng di y:

a. Chi ph xy dng c bn phng n I

Bng II.10. Bng tnh chi ph xy dng c bn phng n I.

SttTn ng lS lngV chngL (m)S (m2)n gi(103/m)Thnh tin(106)

1Ging nghing chnh1B tng59612,06050036058

2Ging nghing ph1B tng45020,19500042750

3Sn ging 01B tng30015,3265007950

4L dc va 0 1B tng151316,82850043120,5

5L xuyn va 01Thp74015,32650019610

6Thng vn ti (0+75 )6Thp9007,81500013500

7Thng thng gi, i li (0 +135)6Thp16207,81500024300

8L xuyn va +1351Thp90015,32650023850

Tng------211138,5

b. Chi ph xy dng c bn phng n II

Bng II.12. Bng tnh chi ph xy dng c bn phng n II.

SttTn ng lS lngV chngL (m)S (m2)n gi(103/m)Thnh tin(106)

1Ging ng chnh1B tng15419,612500019250

2Ging ng ph1B tng15424,615000023100

3Sn ging 01B tng30015,3265007950

4L dc va 01B tng189016,82850053865

5L xuyn va 01Thp74015,32650019610

6Thng vn ti (0+75 )6Thp9007,81500013500

7Thng thng gi, i li (0 +135)6Thp16207,81500024300

8L xuyn va +1351Thp90015,32650023850

Tng------200 425

II.6.5.2. Chi ph sn xut

a. Chi ph bo v cc ng l

Chi ph bo v cc ng l c tnh theo cng thc sau:

Cbvi = Kbvi.Li.ti,

(II.6).Trong :

Cbvi: Chi ph bo v ng l th i, ;Kbvi: Chi ph bo v mt mt l th i trong mt nm, /m-nm;

Li: Chiu di ng l th i , m;

ti: Thi gian bo v ng l th i , nm.

T cc tnh ton trn ta c tui m thc t l 16 nm, vy ta c th ly thi gian khai thc ht mt tng l 8 nm, trn c s ta s tnh c thi gian bo v cc ng l.

Theo cng thc (II.6) ta s tnh c chi ph bo v cc ng l cho tng phng n m va, kt qu tnh ton c th hin c th trong cc bng di y:

* Chi ph bo v ng l phng n I:

Bng II.14. Chi ph bo v ng l phng n I.

SttTn ng lS lngTng chiu di(m)n gi

(103/m-nm)Thi gian bo v(nm)Thnh tin(103)

1Ging nghing chnh15966016527 160

2Ging nghing ph14507016504 000

3Sn ging13007016336 000

4L dc va vn ti chnh 0 trong tr115134016968 320

5L xuyn va mc 017404016473 600

6L xuyn va thng gi +13519004016576 000

7Thng vn ti6900508360 000

8Thng thng gi6162050161 296 000

Tng-----5 014 080

* Chi ph bo v ng l phng n II

Bng II.16. Chi ph bo v ng l phng n II.

SttTn ng lS lngTng chiu di(m)n gi

(103/m-nm)Thi gian bo v(nm)Thnh tin(103)

1Ging ng chnh1154351686 240

2Ging ng ph11544516110 880

3Sn ging 013007016336 000

4L dc va vn ti chnh 0 trong tr1189040161 209 600

5L xuyn va mc 017404016473 600

6L xuyn va thng gi +13519004016576 000

7Thng vn ti6900508360 000

8Thng thng gi6162050161 296 000

Tng-----4 448 320

b. Chi ph vn ti

Chi ph vn ti c tnh theo cng thc sau:

Cvt = Qi. Li. Ti. Kvt,

(II.7).

Trong :

Qi: Lng than vn chuyn qua ng l th i trong 1 nm, T/ nm;

Li: Chiu di vn chuyn qua ng l, m;

Ti: Thi gian vn chuyn ca cc ng l, nm;

Kvt: n gi vn chuyn 1 tn than qua 1 km ng l (/tn-km).

Cc gi tr tnh ton c th hin trn trong cc bng di y:

* Chi ph vn ti phng n I

Bng II.18. Chi ph vn ti phng n I.

SttTn ng lS lngChiu di (km)Qi 106 t/nmKvt(/tn-km)Thi gian (nm)Thnh tin 106

1Ging nghing chnh10,5961,012001611 443

2L xuyn va 010,7401,011001613 024

3Dc va 011,5131,011001626 629

4L thng60,90,5170086 120

Tng------57 216

* Chi ph vn ti phng n II

Bng II.20. Chi ph vn ti phng n II.

SttTn ng lS lngChiu di (km)Qi 106 t/nmKvt(/tn-km)Thi gian (nm)Thnh tin 106

1Ging ng chnh10,1541,065001616 016

2L xuyn va 010,7401,011001613 024

3Dc va 011,891,011001633 264

4L thng60,90,5170086 120

Tng------68 424

c. Chi ph thng gi

Chi ph thng gi bao gm: chi ph ng lc, chi ph lng cng nhn, chi ph khu hao thit b v chi ph vt liu. Khi tnh ton chi ph thng gi ch tnh chi ph ng lc do cc thnh phn chi ph khc rt nh c th b qua. Chi ph ng lc thng gi c tnh nh sau:

Ctg = N.K , /nm

(II.8).

Trong :

K: n gi in nng, /kwh;

N: in nng tiu hao ca qut trong mt nm, kwh;

N = kwh

(II.9).24, 365: S gi lm vic ca qut trong 1 ngy m v s ngy 1 nm;

Q: Lu lng khng kh cn cung cp cho m, m3/s;

h: H p ln nht ca mng gi m, mmH2O;

(q, (m, (: Hiu sut qut, hiu sut mng in, hiu sut ng c.

T cng thc tnh ton trn ta thy chi ph thng gi tng ng vi 2 phng n m va trn l nh nhau hoc chnh lch khng ng k. Vy ta ly chi ph thng gi cho 2 phng n m va trn l bng nhau.

d. Chi ph thot nc

Chi ph thot nc bao gm cc thnh phn chi ph sau: Chi ph khu hao thit b, chi ph ng lc, chi ph lng cng nhn, chi ph vt liu. Tng t nh i vi thnh phn chi ph thng gi, ta ly chi ph thot nc cho 2 phng n m va nu trn l bng nhau.

II.6.5.3. Chi ph mua sm, lp t thit b

Trong mc ny n ch tnh chi ph mua sm mt s thit b chnh cho tng phng n m va, cc chi ph c th hin c th trong cc bng di y:

a. Chi ph mua sm, lp t thit b phng n I

Bng II.22. Chi ph mua sm, lp t thit b phng n I.

SttTn thit bS lngn gi

103/ciThnh tin

103

1Qut gi chnh22 100 0004 200 000

2Bng ti ging nghing chnh B=1000mm, L=678 m16 542 0006 542 000

3My trc ti ging ph, D = 2000mm12 561 0002 561 000

4H thng ti dy ch ngi2254 600509 200

5My cp liu lc, P=13kw1296 000296 000

6H thng trc ti l thng, Dt=510mm398 336295 008

7Tu in cn vt1480 000480 000

8Tu in c qui5420 0002 100 000

9Chi ph lp t thit b--139 900

Tng---17 123 108

b. Chi ph mua sm, lp t thit b phng n II

Bng II.24. Chi ph mua sm, lp t thit b phng n II.SttTn thit bS lngn gi

103/ciThnh tin

103

1Qut gi chnh22 100 0004 200 000

2My trc ti tang ma st ging chnh, D=3,5m17 728 5007 728 500

3My trc ti tang ma st ging ph, D=3,5m16 416 5006 416 500

4Thng skip ging ng2212 175424 350

5Thng ci ging ph2164 925329 850

6H thng trc ti l thng, Dt=510mm398 336295 008

7Tu in cn vt1480 000480 000

8Tu in c qui5420 0002 100 000

9Chi ph lp t thit b--595 830

Tng---26 570 038

II.6.5.4. So snh kinh t gia cc phng n

la chn phng n m va hp l nht, bn cnh vic so snh v mt k thut cc phng n cn phi so snh kinh t gia cc phng n. Kt qu so snh c th hin trong bng di y:Bng II.26. Bng so snh kinh t gia cc phng n

SttCc ch tiuPhng n IPhng n II

Triu ngTriu ng

1Chi ph XDCB211 138,5200 425

2Chi ph mua sm thit b17 123,10826 570,038

3Chi ph bo v cc ng l5 014,084 448,32

4Chi ph vn ti57 21668 424

5Tng290491,6319540,1

6So snh100%110,1%

*Nhn xt:Qua bng so snh ta thy phng n I c tng mc u t nh hn phng n II , c th phng n I l 100% th phng n II l 110,1% .II.6.6. Kt lun

Qua bng so snh trn ta thy phng n I v phng n II c tng chi ph u t gn tng ng nhau . ng thi phng n I c nhiu u im v mt k thut hn so vi phng n II. Vy n la chn phng n m va cho khu vc thit k l phng n I: M va bng ging nghing kt hp vi l xuyn va mc.

II.7. Thit k thi cng o l m va.

Trong mc ny n ch thit k thi cng cho mt ng l mu, cc ng l khc thit k thi cng tng t. Sau y n s trnh by phn thit k thi cng ng l xuyn va chnh mc 0 o trong .

II.7.1. Chn hnh dng tit din ng l v vt liu chng l

Cn c vo thi gian tn ti ca m, sn lng khai thc hng nm, c im a cht khu vc thit k cng nh phng php m va c la chn. n la chn hnh dng tit din ng l l tit din hnh vm tng ng, vi hnh dng tit din vt liu chng l ph hp s l v chng thp linh hot SVP. Chng l bng v chng thp cho php y nhanh tin thi cng ng l rt ngn thi gian xy dng c bn.

II.7.2. Xc nh kch thc tit din l

xc nh kch thc tit din ng l ta da trn hai iu kin c bn sau: iu kin v vn ti v iu kin v thng gi.

1. iu kin v vn ti

Cng sut m c giao l 1500000 tn/nm do sn lng m cn vn chuyn qua l xuyn va mc 0 s l 1500000 tn/nm. m bo cng tc vn ti c lin tc v gim gi thnh vn ti, n la chn phng php vn ti bng bng ti. ng l c thit k thi cng s gm hai lung vn ti: Tuyn bng ti vn ti than v tuyn ng gong vn ti vt liu, thit b.

a. La chn thit b vn ti

+, Chn bng ti

Nng sut yu cu ca bng ti c tnh theo cng thc:

Q yc = ,tn/gi (II.10).

Trong :

Q - l khi lng than cn vn ti, Q=1500000 tn/nm;

K - l h s khng iu ho, K = 1,5;

N - l s ngy lm vic trong nm, N = 300 ngy;

C - l s ca lm vic trong ngy. C = 3 ca;

T - l s gi lm vic trong ca, T = 5,5 gi.

Thay s ta c: Qyc= = 454,5 tn/h.

Cn c vo Qyc = 454,5 tn/h ta chn loi bng ti B1, cc thng s k thut ca h thng bng ti B1 c th hin trong bng sau:

Bng II.27. Cc thng s k thut h thng bng ti B1.

TTc tnh k thutn vS lng

1B rng bng, Bmm1000

2Chiu di bng, Lm740

3Cng sut, QTn/h455

4Tc bng, Vm/s2

5Cng sut ng c, NckW150

+, Chn tu in, gong vn ti

Chn tu in cn vt 14 KP -2 v gong BW-5, cc thng s k thut ca tu in cn vt 14 KP -2 v gong BW-5 c th hin trong bng di y:

Bng II.28. Thng s k thut ca u tu in cn vt 14KP-2.SttCc thng sn vCh tiu k thut

1Chiu caomm1550

2Chiu dimm4900

3Chiu rngmm1350

4C ngmm900

5Tc Km/h12,6

6Trng lng bm dnhTn14

Bng II.29. Thng s k thut ca gong BW-5.

SttCc thng sn vCh tiu k thut

1Dung tchm33,3

2Chiu caomm1350

3Chiu rngmm1320

4Chiu dimm4350

5Trng lng vn chuyntn3,5

6C ngmm900

b, Chiu rng ng l ti chn vm, mm

*Chiu rng bn trong khung chng

Bv = m + A + C + A1 + n, mm

(II.11).

Trong :

m: Khong cch an ton tnh t mp ngoi ca thit b vn ti n hng l pha khng c ngi i li, m = 500 mm.

A: Chiu rng ln nht ca tuyn bng ti, A = 1350 mm

C: Khong cch gia hai thit b vn ti, C = 400 mm

A1: Chiu rng u tu vn ti, A1 = 1350 mm

n: Khong cch t mp ngoi cng thit b vn ti n hng l pha c ngi i li c rnh nc, n = 1300 mm.

Thay s ta c:

Bv = 500 + 1350 + 400 + 1350 + 1300 = 4900 mm.

Bn knh vm: R = = = 2450 mm

*Chiu rng ng l bn ngoi khung chng

B = Bv + 2(bv + bc)

Trong : bv l chiu dy v chng ,v SVP c chiu dy 123 mm bc l chiu dy chn bc = 50 mm

Vy : B= 4900 + 2(123 + 50) =5246 mm

Ta ly B=5300 mm

c. Chiu cao ca ng l khng k v chng

- Chiu cao ng l ti mc cao nht ca thit b vn ti, mm

H1 = Htb + Hr + Hn, mm.

Trong :

Htb: Chiu cao ln nht ca cc thit b vn ti (u tu), Htb=1550 mm

Hr: Chiu cao ray, Hr = 160 mm

Hn: Chiu cao lp lt nn, Hn = 190 mm

Thay s ta c: Hl = 1550 + 160 + 190=1900 mm.

- Chiu cao tng l, mm

Cn c vo thc t cng tc thit k thi cng o l cc m ta chn chiu cao tng l l Ht=1200 mm.

- Chiu cao vm : H = = = 2450 mm

-Chiu cao ca ng l : H = Ht + Hv =1200+2450 =3650 mm

* Chiu cao ng l bn ngoi khung chng :

H = Htb + bv + 2b c= 3650 + 123 +2 . 50 =3870 mmd. Chiu rng ng l ti v tr cao nht ca thit b vn ti, mm

B = Bv 2.(Hl - Ht).tg( mm

(( l gc ca tip tuyn vi ng l ti chn vm, ( = 80)

Thay s: B = 4900 2(1900-1200).tg80 = 4703 mm

e. Din tch s dng ca ng l

Ssd = ht.Bv + 0,5.(.R2, m2

Thay s ta c:

Ssd = 1,2.4,9 + 0,5.3,14.2,452 = 15,3 m2f. Tnh din tch o ca ng l

S = 1,15.Ssd = 15,3.1,15 = 17,6 m22. Kim tra tit din ng l theo iu kin thng gi

Tc gi tnh ton i qua ng l c xc nh bng cng thc sau:

Vtt= , m/s

(II.12).

Trong :

Am: sn lng than trong nm, Am = 1500000 tn;

k : h s d tr k =1,2;

: h s thu hi tit din: = 0,9;

q : lng gi cn thit cho 1 tn than khai thc trong 1 ngy m, vi m hng I v kh chy n th: q = 1 m3/pht;

N : S ngy lm vic trong nm : N = 300 ngy;

Ssd: Din tch s dng ng l : Ssd = 15,3 m2.

Thay s ta c: Vtt = = 7,2 m/s

Vy tc tnh ton tho mn iu kin V = 0,25 8m/s, tit din s dng ca ng l l 15,3 m2 l hon ton hp l.

II.7.3. Lp h chiu chng l

1. Tnh ton p lc ca t tc dng ln v chng

a. p lc t tc dng ln nc l

p dng cng thc ca GS. Priaknov ta c:

PN = .( T/m

(II.13).

Trong :

f: H s kin c ca t nc l f = 6;

(: T trng ca t , ( = 2,6 T/ m3;

a: Na chiu rng ng l khi o: a = 2.45 m.

Thay s ta c: PN = = 3,5 T/m.

b. p lc t tc dng ln hng l

tnh p lc t tc dng ln hng l ta s dng gi thuyt vm p lc ca gio s Tximbarevich

Theo Tximbarevich:

Ph = , tn/m

(II.14).

Trong :

h: Chiu cao ng l khi o, h = 3,87 m;

: Gc ni ma st t hng l, = arctg(f )= arctg(6) =800;

b1: Chiu cao vm cn bng t nhin;

b1 = = = 0,4 m.

Vy thay vo cng thc ta c:

Ph = = 0,15 (tn/m).

c. p lc t tc dng ln nn l

Theo Gio s Tximbarevich:

PNn= Do tg T/m

(II.15).

Trong :

Do - Lc y ngang;

D0 , tn/m;

H- Chiu cao vm cn bng t nhin cng chiu cao ca ng l o;

H = b1 + h = 0,4 + 4,0 = 4,4 m;

X0: Chiu su ca lp nn tham gia vo vic gy p lc nn;

X0 = = 2,64.10-4 m.

Thay s vo cc cng thc trn ta c: Pnn = 2,36.10-5 t/m, ta thy p lc nn rt nh nn c th b qua do vy ta khng cn phi chng gi nn l.

d. Xc nh bc chng

T thc t cng tc thit k thi cng cc ng l m, n chn vt liu chng l l v chng thp SVP-27 vi bc chng 0,8 m/v. Trnh t chng l c tin hnh nh sau:

Dng ba thanh ray di 3 m bt lin kt bng gng, c bit l hai x ca v chng. Ba thanh ray ny c tc dng nh mt dm congson hai x. Sau ta ln x ln lt t ngoi vo, dng gng c bit nh v x vi ray, dng thanh ging bng thp ch to sn bt lin kt cc x vi nhau, sau ci chn, nh vng v chng tm. Sau khi tin hnh xc bc t ta tin hnh sa gng v chng c nh. Xc nh l chn ct, o l chn ct, lp ct, dng thanh ging lin kt cc ct vi nhau v chnh cho v chng ng k thut, dng gng bt c nh x vi ct, chn nc l v hng l. H chiu chng c nh l xuyn va c th hin trn hnh v . (Hnh VII ) II.7.4. Lp h chiu khoan n mn khi o l

II.7.4.1. Chn cng ngh ph v t v thit b ph v t

a. Chn my khoan:

t khu vc thit k c h s kin c f = 6 nn ta chn my khoanR- 30 do Nga sn xut c mt s c tnh k thut sau:

Bng II.30. c tnh k thut my khoan R- 30TTCc thng sn vCh tiu k thut

1Chiu di mym0,7

2p sut kh nn lm vicKg/cm25

3Tiu hao kh nnm3/pht3,5

4S ln pLn/pht1700

5Chiu su l khoanm1,4

6ng knh l khoanmm35 36

7Trng lngkg30

b. Chn my nn kh:

Da vo my khoan chn ta chn my nn kh WW - BKC - 50 vi mt s c tnh k thut sau.

Bng II.31. c tnh k thut ca my nn kh WW - BKC - 50.

STTCc thng sn vCh tiu k thut

1Cng sutm3/pht5

2p sut kh nnkg/cm26

3Cng sut ng ckW40

4Trng lng mykg1220

5p lc van an tonkg/cm26,6

c. Chn my bm.

Ta chn thit b cung cp nc khoan l my bm IB-20/10 do Nga sn xut. c tnh k thut ca my bm IB - 20/10 xem bng II.32.Bng II.32. c tnh k thhut my bm IB - 20/10.STTCc thng sn vCh tiu k thut

1Nng sut bmm3/h16

2Chiu cao htm6

3Chiu cao ym100

4ng knh ng htmm70

5ng knh ng ymm100

6Cng sut ng cKw13

7Trng lngkg27,5

d. Chn tin chu k o l

ph hp vi cc thit b vn ti, xc bc ng thi m bo tin ph hp vi khong cch chng gi, chn tin chu k o l l 1,6m/chu k.

e. Thuc n v phng tin n.

Chn thuc n an ton AH.1 do x nghip ho cht m sn xut vi cc c tnh k thut th hin trn bng II.33. Kp n vi sai an ton n do hng IDL sn xut dng n mn cc m hm l c kh, bi than vi cc c tnh k thut th hin trn bng II.34. My n mn IIB-1/100 do Nga sn xut vi cc c tnh k thut th hin trn bng II.35.

Bng II.33. c tnh k thut thuc n AH.1.

Sttc tnh k thutn vCh tiu k thut

1Mt g/cm30,95 ( 1,1

2 m, max%0,5

3Kh nng sinh cng (p)cm3250 ( 260

4Sc cng ph, minmm10

5Khong cch truyn ncm5

6Thi hn m bothng3

7Trng lng thi thucgam200

8ng knh thi thucmm36

9Nhit lng nKcal/kg1100 ( 1150

Bng II.34. c tnh k thut kp n vi sai n .

Sttc tnh k thutn vCh tiu k thut

1Vt liu lm kp-ng

2Chiu di dy dnm2

3in tr1,8 ( 2,2

4Dng in an tonA0,18

5Dng in m bo nA1,2

6Cng n-s 8

Bng II.35. c tnh k thut my n mn IIB-1/100.

Sttc tnh k thutn vCh tiu k thut

1in tr ti a ca mng n320

2in p nV600

3S kp u ln nht cho mt ln nkp100

4Thi gian vo hot nggiy4 ( 8

II.7.4.2. Cc thng s khoan n mn

a. Ch tiu thuc n n v :

L lng thuc n tnh bng kg cho 1m3 t nguyn khi v c tnh theo cng thc thc nghim ca Pocrovski:

q = q1.fc.V.e. kd (kg/m3)

(II.16).

Trong :

kd - H s nh hng n ng knh thi thuc: kd = 0,95;

q1 - Ch tiu thuc n tiu chun: q1 = 0,1.f kg/m3;

f - H s kin c ca t : f = 6, q1 = 0,6 kg/m3;

fc - H s k n s mt phng t do: fc = 1,15;

e - H s xt ti sc cng n ca thuc;

e = (P - Sc cng n ca thuc n AH - 1, P = 260 cm3);

V h s sc cn ca t ;

V =;

S din tch o ca ng l : S =17,6 m2.

Thay s vo cng thc II.14 ta c:

q = 0,1.6 . 1,15 . .. 0,95 = 1,48 kg/m3.

b. S l mn trn gng

nng cao hiu qu ph v t v m bo an ton trong cng tc o l, ngi ta b tr cc l mn trn gng thnh cc nhm sau: nhm l mn bin; nhm cc l mn ph v nhm cc l mn t ph. Sau y ta s tin hnh tnh ton s l mn cho tng nhm.

- S l mn bin:

S l mn bin c tnh theo cng thc sau:

Nb = , l

(II.17).

Trong :

P0: Chiu di b tr l mn bin, m;

P0 = 2(Ht c) + (B-2.a) + ((R - a), m;

c, a: Khong cch t cc l mn bin n nn l v thnh l, c = a= 0,2m m; b: Khong cch gia cc l mn bin, b = 0,65 m;

Ht, R, B: Chiu cao tng, bn knh vm, chiu rng ca ng l khi o: Ht=1,2m; R=2,8m; B=5,3m.

Thay s: Nb ==22,4 l;

Chn Nb = 22 l.

- S l mn nhm ph v t ph

Ncp = , l

(II.18).

Trong :

(b - Lng thuc np trung bnh trn 1m l mn to bin;

(b = 0.785.db2..k1.ab, kg/m;

db- ng knh thi thuc: db = 0,036 m;

( - Mt thuc n trong thi thuc: ( = 1100 kg/m3;

k1- H s phn b ng sut ph thuc vo h s cng n: k1=0,65;

ab - h s np thuc cho cc l mn bin: ab = 0,65;

( - lng thuc n trung bnh trn 1m l mn ph v cng ph;

( = 0.785.db2..kn.ab, kg/m;

a - H s np thuc cho cc l mn ph v cng ph, a = 0,73;

kn - H s nn cht thuc n trong l mn, kn = 0,95.

Thay s ta c:

(b = 0,785.0,0362 .1100.0,65.0,65 = 0,47 kg/m

( = 0,785.0.0362.1100.0,95.0,73= 0,77 kg/m

Ncp = = 20,4 l, chn Ncp = 20 l

Vy tng s l mn trn gng l s l: N = Nb + Ncp = 22 +20=42 l, ta b tr s l mn nhm t ph(to rch) l Np=6 l; s l mn nhm ph l Np = 14 l; s l mn bin l Nb = 22 l.

c. ng knh l khoan (dk, mm)ng knh l khoan c tnh da trn tng ng knh ca cc thi thuc v khong h cho php d dng np thuc:

dk = d + (3 ( 5), mm

Trong :

d: ng knh thi thuc n s dng, d = 36mm

3 (5 mm: Khong h cho php gia thi thuc n vi thnh l khoan khi khoan trong gng .

Vy ng knh l khoan: dk = 40mm

d. Chiu di l khoan (lk, m)

Chiu su trung bnh l khoan c xc nh theo cng thc:

lk = , m

(II.19).

Trong :

lt: Tin 1 chu k o l, lt = 1,6 m/chu k;

: H s s dng l mn, = 0,85.

Thay s: lk = = 1,8 (m).

e. Lng thuc n cho mt chu k o l (Q, kg)

Q = q.S.lk.(, kg

(II.20).

Trong :

q: Lng thuc n n v, q = 1,48 kg/m3;

(: H s s dng l mn, ( = 0,85;

lk: Chiu di l khoan, l = 1,8m;

S: Tit din o ca ng l, S = 17,6 m2.

Thay s: Q = 1,48.17,6. 1,8. 0,85 = 40 (kg).

f. Lng thuc n trung bnh cho mt l khoan (qtb)

qtb = = 0,95 kg/l.

g. S b tr l khoan trn gng.

Ta b tr cc l mn trn gng nh sau:

- Nhm l khoan t ph to rch: 6 l, vi chiu su nhm l khoan: 1,9m,

- Nhm l khoan ph: 14 l, vi chiu su nhm l khoan: 1,8 m,

- Nhm l khoan to bin: 22 l, vi chiu su nhm l khoan: 1,8m.

Lng thuc n np cho mt l mn trong cc nhm:

- L mn t ph to rch: qr = 1,2.qtb = 1,2. 0,95 = 1,2 kg/l.

- L mn ph: qp = 0,9.qtb = 0,9. 0,95 = 0,85 kg/l

- L mn to bin: qb = 1,1.qtb = 1,1.0,95 = 1,0 kg/lVy tng lng thuc n thc t cn dng cho mt chu k o l l:

Qtt =6.1,2 + 14.0,85 + 1.22 = 41kg.

II.7.4.3. H chiu khoan n mn

H chiu khoan n mn l xuyn va c th hin chi tit trn hnh v di y. (Hnh VIII ) II.7.5. Xc nh khi lng tng cng vic trong mt chu k o l

II.7.5.1. Thng gi an ton gng

a. Cc yu cu:

- Sau khi n mn lng khng kh trong l cn 20% oxy, oxit cacbon (C0,C02) f1 p lc do c vch c bn v vch trc tip to nn.

Khi f1 > f2 p lc ch do vch trc tip tc dng xung.

-Xc nh vng ca vch trc tip v vch c bn

vng ca vch trc tip c xc nh theo cng thc sau:

f1 = , cm

(III.11).

vng ca vch trc tip c xc nh theo cng thc sau:

f2 = , cm(III.12).

Trong :

(1, (2: Trng lng th tch ca vch trc tip v vch c bn, 1 = 2,6 T/m3, 2 = 2,65T/m3;

h1, h2- Chiu dy lp vch trc tip v vch c bn, h1 = 6 m, h2 = 12 m;

l1, l2- Chiu di ln nht ca dm conson vch trc tip v vch c bn;

l1 = b + lph;

b: Khong trng nh nht tnh t gng l ch n hng ct chng ph ho, b=2,2 m;

lph: Bc ph ho thng k, lph = 0,7 m;

Vy l1 = 2,2 + 1,4 = 3,6 m = 360 cm;

l2 = , m;

(u2: ng sut un ca vch c bn, (u2 = 200 KG/cm2;Vy l2 = = 5494 cm;

E1, E2- M un n hi ca vch trc tip v vch c bn ;

E1 = , E2 =;

En1 , Ek1- Momen n hi kh nn v ko ca vch trc tip;

En1 = 35.104 KG/cm2, Ek1 = 12.104 KG/cm2;

En2 , Ek2- Momen n hi kh nn v ko ca vch c bn;

En2 = 45.104 KG/cm2, Ek2 = 15.104 KG/cm2;

Vy:

E1 = KG/cm2;

E2 = KG/cm2;

J1: M men qun tnh i vi trc trung ho ca lp than nc v vch trc tip (cm4);

J2: M men qun tnh i vi trc trung ho ca vch c bn (cm4);

;

;b: Chiu rng dm conson ca vch trc tip v vch c bn theo hng dc, b = 1 m;

Thay s ta c:

J1 = cm4;

J2 = cm4;

f1 = cm;

f2 = cm.

T kt qu tnh ton trn ta thy f2 > f1 nn p lc tc dng ln lung bo v l trng lng ca vch trc tip v mt phn trng lng ca vch c bn v c xc nh theo cng thc sau:

Pph = R +R, T/m

(III.13).

- p lc ca vch trc tip tc dng ln lung bo v:

R = , T/m.(III.14).

Trong :

b: chiu rng l ch, b = 2,4m;

ls: khong cch t v ph ho n im gy vch, ls =2r =1,6 m;

Thay s ta c:

R = T/m.

- p lc ca vch c bn tc dng ln v chng ph ho:

R = , T/m(III.15).

Trong :

T- Tr s p lc ca vch c bn truyn ln vch trc tip tc dng ln v chng ph ho;

, Tn

(III.16).

Thay s ta c:

T = KG/cm = 0,476 T/m;

R = = 0,85 T/m.

Vy tng p lc tc dng ln v chng ph ho l:

Pph = R + R = 45,87 + 0,85 = 46,72 T/m.

* Ti trng dc gng khai thc

Pdg = Pg1 + Pph = 39,5 + 46,72 = 86,22 T/m.

III.4.3.3. La chn cng ngh chng gi

Hin nay ti cc m than hm l vng than Qung Ninh, vic chng gi l ch h trn than nc thng s dng cc loi gi thu lc di ng hoc ct thu lc n vi x hp v cho kt qu kh quan. Cc loi gi thu lc di ng c s dng rng ri hin nay hu ht c sn xut ti Trung Quc, gm gi dng cho va thoi c m hiu XDY-1T2/LY v gi dng cho va gc dc n 450 c m hiu XDY-1T2/Hh/Lr. nng cao sn lng khai thc, nng sut lao ng v ci thin iu kin lm vic cho cng nhn, n la chn cng ngh chng gi bng gi thu lc di ng cho l ch . Chn loi gi thu lc di ng c m hiu XDY-1T2/LY, cc c tnh k thut ca gi thu lc di ng XDY-1T2/LY c th hin trong bng di y.

Bng III.9. Bng c tnh k thut gi thu lc di ng XDY-1T2/LY.

Sttc tnh k thutn vKhi lng

1Chiu cao ti amm2460

2Chiu cao ti thiumm1760

3Hnh trnh pt tngmm700

4Chiu rng gimm680

5Chiu di gimm2260

6Bc tin ca dm tin gngmm700800

7Ti trng lm vicKN1200

8p sut bmMPa20

9ng knh xi lanhmm100

10Trng lng gi k c ct chngmm2460

Cng vi gi thu lc di ng c la chn, n chn ng b thit b i km gm: ct thu lc n bm dch ngoi m hiu DZ-22 kt hp vi x hp DFB-3600 chng tng cng ng ba l ch, trm bm dung dch nh ho BRW200/31,5. c tnh k thut ca cc thit b trn c ghi trong cc bng di y:

Bng III.10. c tnh k thut ca ct thu lc n DZ-22.

Sttc tnh k thutn vCh tiu k thut

1Ti trng cng tcTn30

2p sut lm vic bm duPa20

3Chiu cao ct ti amm2240

4Chiu cao ct ti thiumm1440

5Hnh trnh pittngmm800

6ng knh xi lanhmm100

7Din tch ctcm2109

8Trng lng khng c nh tngkg55

9Trng lng c nh tngkg60

Bng III.11. c tnh k thut ca trm bm dung dch nh ho BRW200/31,5.

TTThng s k thutn vTr s

1p sut ng htMPap sut thng thng

2p sut nh mcMPa31,5

3Lu lng nh mclt/pht200

4Tc quay trc khuuV/pht561

5ng knh pistonmm50

6Hnh trnh pistonmm66

7Cng sut ng ckW125

8Tc quay ng cV/pht1480

9in pV660/1140

10p sut iu chnh ca van an ton khi lm vicMPa34,7 ( 36,8

11p sut iu chnh ca van trt ti khi lm vicMPa31,5

12Van trt ti khi phc p sut lm vic-Tng ng vi 80-90% p sut iu chnh ca van trt ti

13Dung dch lm vic-Dung dch nh ho (gm nc trung tnh v 5% du nh ho)

14Khi lngT2,6

15Kch thc: di x rng x caomm2300 x 980 x 1040

III.4.3.4. Tnh s lng v chng

a. Xc nh s lng gi thu lc di ng cn thit cho l ch

Thit k tnh ton cho l ch c chiu di ln nht theo hng dc l 132 m, khong cch gia cc gi thu lc di ng c ly theo thc t p dng cc m l 1,0 m. Do , s lng gi thu lc cn thit cho l ch tnh c d phng 10% l:

1,1.() = 146 gi.

Vy ta chn s gi thu lc di ng cho l ch tnh c d phng l 146 gi.

b. Xc nh s ct chng thu lc n v x kim loi cn thit

Ct thu lc n, x kim loi s dng trong l ch chng tng cng khu vc ng ba gia l ch vi l song song chn, l dc va thng gi v chng tng cng trong l ch gii quyt cc s c trong qu trnh khai thc. S lng ct thu lc n DZ-22 chng tng cng trong l ch gii quyt s c trong qu trnh khai thc tm tnh l 30 ct. Ng ba gia l ch vi l thng gi v l song song chn c chng tng bng hai hng ct thu lc n DZ-22 kt hp vi x hp DFB-3600. Ti mi ng ba, thit k b tr chng tng cng vt trc gng l ch 10 ( 15 m. Tng s ct v x chng tng cng ti ng ba l ch tm tnh l: 64 ct thu lc n DZ-22 v 16 x hp DFB-3600.

Nh vy, tng s ct thu lc n DZ-22 cn thit cho l ch tnh c d phng 10% l:

1,1.(30 + 64) = 103 ct, lm trn 110 ct

S x hp DFB-3600 c d phng 20% l: 1,2.16 = 19 x, lm trn 20 x

Tng hp cc loi thit b-vt t chng l ch p dng gi thu lc di ng c th hin c th trong bng di y:Bng III.12. Bng tng hp cc thit b-vt t chng l ch.

TTTn thit bM hiun vS lng

1Gi thu lc di ngXDY-1T2/LYB146

2Ct thu lc nDZ-22Ct110

3X hpDFB- 3600X20

III.4.3.5. Lp h chiu chng l ch

Cn c vo cc kt qu tnh ton trn, thit k xy dng h chiu chng gi cho l ch nh sau:

- Chiu di l ch trung bnh theo hng dc l 132 m.

- Chiu rng l ch ti a l 2,71 m v ti thiu l 2,01m.

- Khong cch cc gi thu lc di ng theo hng dc l 1,0 m.

- Cc ng l thng gi v l chn nm trong phm vi ng ba vi l ch c chng chuyn i t tit din hnh vm chng thp sang tit din hnh thang chng g thu hi v chng thp. Phm vi chng chuyn i t 10 ( 15 m.

- Trong phm vi ng ba u v chn l ch c chng tng cng bng hng v chng gm ct thu lc n DZ-22 v x hp DFB-3600. Hng v tng cng s c thu hi v chng ui theo tin khu ca l ch, chiu di phm vi chng tng cng mi ng ba t 10 ( 15 m.

H chiu chng gi l ch (Hnh XI) III.4.4. iu khin vch

Khi tin hnh cc cng tc khai thc than, trng thi cn bng ca cc lp b ph hu, chng rn nt v c th sp vo hm l. ngn nga nhng bin dng ln v s sp ca vo khng gian cng tc cn phi s dng nhiu bin php khc nhau nhm iu chnh s xut hin ca p lc m. Nhng bin php l mt trong nhng qu trnh sn xut quan trng v c gi l iu khin p lc m. Trong cc gng l ch di cc va dc thoi v dc nghing, iu khin p lc m ch yu l iu khin p lc ca vch, nn thng c gi l iu khin vch.

vch trc tip ca va nghin cu thit k c chiu dy trung bnh l 6,0 m, ch yu l bt kt c n nh trung bnh. Vch c bn l bt kt xen kp ct kt vi chiu dy trung bnh 12m, cng chc thuc dng sp trung bnh n kh sp , t trng trung bnh ca cc lp vch l 2,6 2,65 tn/m3. Cn c vo cc tnh cht c l ca vch, n la chn phng php iu khin vch l phng php ph ho ton phn.

* Kim tra iu kin cho php ph ho ton phn:

iu kin cho php p dng phng php ph ho ton phn l khi vch sau khi sp nh h s n ri ca n phi m bo lp y khong trng khai thc ng thi lp y khong khng gian m n chim trc khi sp . iu kin ny tho mn khi bt ng thc sau tho mn:

(III.17).

Trong :

h: Chiu dy lp vch trc tip, h= 8 m;

m: Chiu dy ca va khi khai thc, m=7,6 m;

Knr: H s n ri ca vch trc tip, Knr = 1,8;

Thay s ta c: ;

Vy iu kin trn tho mn cho php p dng phng php ph ho ton phn.

- Ph ho ban u:

Ph ho ban u l khi l ch bt u khai thc, sau mt thi gian ta phi tin hnh ph sp ton b khong khng khai thc lm gy vch gim p lc ban u tc dng ln v chng to cho bc ph ho thng k.

Chiu di bc ph ho ban u xc nh theo cng thc ca G.S Brisp:lb = , cm(III.18).Trong :

v: H s gim khu do b ro khi un ca vch trc tip; v = 1

v: Gii hn bn un ca vch trc tip, v = 200 KG/cm2;

h: Chiu dy phn lp di cng ca vch trc tip d sp , h=0,5 m = 50 cm;

q: Ti trng ca vch trc tip;

q = . h1. cos, tn/m2;

h1: Chiu dy trung bnh ca vch trc tip, h1 = 6 m;

: Trng lng th tch ca vch, = 2,6 tn/m3;

: gc c va than, = 280;

Thay s: q = 2,6.6.cos280 = 13,9 T/m2 = 1,39 KG/cm2;

: H s bin i ngang = 0,25 ( 0,5; chn = 0,5;

Thay s ta c:

lb = = 1696 cm = 16,96 m.

Vy ta chn bc ph ho ban u l 17 m, trc khi ph ho ban u phi thng xuyn theo di tnh trng gng l gii quyt khong cch ph ho ban u cho ph hp.

-Ph ho thng k:

gim p lc ca vch ln cc ct chng ca lung bo v ta chn bc ph ho thng k bng tin dch chuyn gng l ch sau mt chu k, ltk = 0,7m.Vic ph ho thng k c tin hnh sau hai lung khu, trc khi ph ho phi cng c l chc chn t lung st gng sang lung bo v. Sau khi di chuyn gi thu lc di ng vch s t sp , trng hp vch khng sp th ph c bin php ph ho cng bc bng khoan n mn ph ho vch.

III.4.5. Cng tc khu than, di chuyn gi thu lc v thu hi than nc

a. Cng tc khu than

- Cng tc khu than c tin hnh t l song song chn ln l thng gi vi chiu rng lung khu l 0,7 m. Trong mt chu k (gm 3 ca) thc hin khu mt lung, ng vi mi lung ta chia thnh nhiu on khu theo chiu di l ch.

- Trnh t khu than l ch gi thu lc di ng c tin hnh trong 2 ca sn xut, ca 3 tin hnh thu hi lp than nc, chuyn mng, cng c l v ph ho.

- i vi ca khai thc khi lng cng vic gm: khoan n mn, thng gi, y dm tin gng, xc than ln mng, di chuyn gi v mng trt.

-Khi n mn khai thc lung mi, ta tin hnh bm dung dch nh tng vo c cu dm tin gng v di chuyn dm, tin hnh tri li thp B40 c kch thc (0,8x1m) dc theo nc gng khu pha trn dm tin gng. Li thp ny c tc dng ngn cn than nc ri xung gy mt an ton cho cng nhn lm vic di gng khai thc v cn trnh gi khi than nc mm yu, than ri xung lm mt gi ta ca gi, mt trng ti gy gi.

b. Cng tc di chuyn gi thu lc

Sau khi ti ht phn than n mn, tin hnh di chuyn gi thu lc di ng theo trnh t t di ln trn tng phn on mt. u tin ta bm dung dch nh tng rt dm tin gng ca mt bn x v x nh tng hai ct ca mt bn x , bm nh tng vo c cu dch chuyn x. y ct v x dch chuyn v pha trc vi bc tin 0,7m ti v tr mi ca x ta tin hnh bm dung dch nh tng vo hai ct x c p cht ln nc l. Sau khi kt thc ta tin hnh chuyn bn x cn li, cc bc tin hnh tng t.

c. Cng tc thu hi than nc

Sau khi khu c hai lung ta tin hnh thu hi than nc vi chiu dy 5,4m, lp ny khng th t sp v vy m cn phi tin hnh khoan n mn h trn than nc. thu hi than ta dng ko ct li B40 to ra cc ca tho theo kch thc 40 cm x 40 cm cch nn l 0,2 m khong cch gia cc ca tho l 2m.

III.4.6. T chc chu k sn xut gng l ch khai thc

III.4.6.1. Khi lng cng vic cho mt chu k

- T chc sn xut 3 ca/chu k, thi gian lm vic mt ca l 8h

- Mi chu k thc hin khu gng mt lung, bc khu 0,7 m/lung. Nh vy tin l ch sau mt chu k l 0,7 m, cc cng vic chnh trong mt chu k bao gm:

+ Cng c l, chuyn vt liu;

+ Khoan l mn gng;

+ Np n mn, thng gi;

+ Tri li, sa gng, y dm tin gng, ti than;

+ Di chuyn gi thu lc;

+ Thu hi than nc;

+ H nn, y mng;

+ Ph ho.

III.4.6.2. Thnh lp i th

a. S ngi cn thit hon thnh cng vic trong mt chu k:

p dng cng thc: ni = , ngi-ca.

Trong :Vi: Khi lng cng vic th i;

Di: nh mc cng vic th i.

Kt qu tnh ton c th hin trn bng III.13 di y:Bng III.13. Bng kt qu tnh ton thnh lp i th.

SttTn cng vicn vViDini

1Khoan l mnm356,4587,74

2Np, n mn, thng gi---4

3Tri li, y dm tin gng, ti thanGi2666,820,5

4H nn, y mng trtm1321513,2

5Di chuyn gi Gi2661119,18

6Thu hi than h trntn528,6137,54

7Ph hom1321110

8Cng c l, chuyn vt liu---6

Tng----81

b. Thnh lp i th:

T kt qu tnh ton trn cho thy hon thnh cc cng vic trong mt chu k cn s cng nhn l 81 ngi. n b tr thnh lp i th ton nng gm 66 ngi chia lm 3 ca lm vic. Vy ta tnh c h s lao ng vt mc nh sau:

Kvm = = 1,2 (m bo yu cu kvm >1).

III.4.6.3. Thi gian hon thnh cc cng tc trong mt chu k

Thi gian hon thnh cc cng tc trong mt chu k c xc nh theo cng thc sau:

ti = , h(III.19).

Trong :

ti: Thi gian hon thnh cng vic th i trong chu k thi cng;

ni: S cng nhn cn thit hon thnh cng vic i;

nbt: S cng nhn thc t b tr hon thnh cng vic i;

tca: Thi gian lm vic 1 ca, tca = 8h;

(: H s tnh n thi gian khng nh mc, ( = 0,9;

Kvm: H s vt mc, Kvm = 1,2.

Thay cc gi tr vo cng thc ta c kt qu th hin trong bng III.14.

Bng III.14. Thi gian hon thnh tng cng vic trong 1 chu k sn xut.

SttTn cng vicnitcanbtKvmti(h)

1Khoan l mn7,7480,951,0910

2Np n mn thng gi-----2

3Tri li, y dm tin gng, ti than39,1280,9261,0910

4H nn, chuyn mng-----5

5Di chuyn gi24,1880,9261,096

6Thu hi than h trn7,5480,9261,092

7Ph ho1280,9261,093

8Chuyn vt liu -----22

9Trc c in, ch o sn xut-----22

III.4.6.4. Biu t chc chu k sn xut v biu b tr nhn lc

III.4.6.5. S cng ngh khai thc l ch GTLD (Hnh XII ) III.4.7. Tnh ton mt s ch tiu kinh t k thut c bn ca cng ngh1. Sn lng than khu gng mt lung

Qk = L . r . mk . ( . k , (T)

(III.20).

Trong :

L: Chiu di trung bnh ca l ch, L = 132 (m);

r: Tin 1 lung khu, r = 0,7 (m);

mk: Chiu cao khu, mk = 2,2 (m);

(: Trng lng th tch ca than, ( = 1,63 (T/m3);

k: H s khai thc than, k = 0,9.

Thay s:

Qk = 132 x 0,7 x 2,2 x 1,63 x 0,9 = 298 (T).

2. Sn lng than h trn mt chu k

Qth = L . rth . mth . ( . kth , (T)(III.21).

Trong :

mk: Chiu cao lp than nc h trn, mk = 5,4 (m);

kth: H s thu hi than nc, kth = 0,65;

rth: Bc thu hi mt chu k, rth = 0,7 m.

Thay s:

Qth = 132 x 5,4 x 0,7x 1,63 x 0,65 = 528,6(T).

3. Sn lng than mt chu k khai thc

Qck = Qk + Qth = 298 + 528,6 = 826,6 (T).

4. Sn lng l ch mt ngy m

Qng. = , (T)(III.22).

Trong :

nck- S ca hon thnh chu k, nck = 3 (ca);

nca - S ca khai thc mt ngy m, nca = 3 (ca).

Thay s:

Qng. = = 826,6(T).

5. Sn lng l ch mt thng

Qthng = Qng. x nt x kck (T)

(III.23).

Trong :

kck - H s hon thnh chu k, kck = 0,9;

nt - S ngy lm vic trong thng, nt = 25 (ngy).

Thay s:

Qthng =826,6 x 25 x 0,9 = 18598,5 (T).

6. Cng sut l ch

Qnm = Qthng x nth x kcd, (T/nm)

(III.24).

Trong :

nth - S thng lm vic trong nm, nth = 12 (thng);

kcd - H s tnh n thi gian chuyn din, kcd = 0,95.

Thay s:

Qnm = 18598,5 x 12 x 0,95 = 212023 (T/nm)

Lm trn: Qnm = 200 000 (T/nm).

7. Nng sut lao ng cng nhn l ch

NSL = = 12,5 (T/cng).

Trong :

Ncn: S cng nhn b tr lm vic trong l ch mt ngy m, Ncn = 66 (ngi).

8. Chi ph tin lng

Hin ti th lng bnh qun mt thng ca cng nhn cng ty than Vng danh l 4,0 triu ng/cng nhn. tnh chi ph tin lng ta s dng cng thc sau:

Cl = ,

(III.25).

Trong :

Ncn: S cng nhn thc t sn xut; Ncn = 66 ngi;

D: nh mc tin lng thc t, D = 4,0 triu ng/ngi;

Nth: S ngy lm vic ca cng nhn trong 1 thng; Nth = 25 ngy;

Ang: Sn lng l ch trong mt ngy m; Ang = 826,6 tn.

Thay s ta c:

Cl = = 22066.10-6 tr ng/tn = 22066 /tn.

9. Chi ph thuc n cho 1000 tn than khai thc

Ctn = = 2665860,15 ()

Trong :

157,4 : Lng thuc n cho mt chu k khai thc, kg;

826,6: Sn lng than khai thc mt chu k, tn;

14000: n gi 1kg thuc n, .

10. Chi ph kp n cho 1000 tn than khai thc

Ck = = 5030244,3 ().

Trong :

330: S kp n cho mt chu k khai thc, ci;

826,6: Sn lng than khai thc mt chu k, tn;

7000: n gi 1 kp n, .

11. Chi ph du nh tng cho 1000 tn than khai thc

Mi ln di chuyn mt b gi thu lc di ng cn 0,6 kg du nh tng. Trong mt chu k khai thc 133 b gi thu lc di ng di chuyn hai ln do mt chu k khai thc thc hin khu gng mt lung.

Vy khi lng nh tng cn thit cho mt chu k l:133.0,6 = 80 (kg). Vi n gi 1 kg du nh tng l 12000 ta c chi ph du nh tng cho 1000 tn than khai thc:

Cd = = 2322767,9 ().

12. Tn tht than theo cng ngh Tn tht cng ngh bao gm tn tht theo chiu cao lp khai thc v tn tht do li tr bo v l.

- Tr lng cng nghip ca l ch:

Zcnlc = Lt. Lp. . m (tn)

(III.26).

Trong :

Lt, Lp: Tng ng l chiu cao nghing ca tng v chiu di theo phng ca khu vc, Lt = 150 m; Lp = 800 m;

m, : Chiu dy va than v trng lng ring ca than, m = 7,6m; = 1,63 T/m3.

Thay s:

Zcnlc = 150. 800 . 1,63. 7,6 = 1486560 (tn)

- Sn lng than khai thc t l ch c xc nh nh sau:

Alc = (tn)

(III.27).

Trong :

r - Tin khai thc mt chu k, r = 0,7 (m);

Qck - Sn lng khai thc mt chu k Qck =826,6 (T).

Thay s: Alc = =944685,7 (T).

- Sn lng than o l chun b ca khu vc: Bao gm l dc va thng gi v l dc va vn ti tit din 7,8 m2, l song song chn tit din 5,6 m2 v thng khi im tit din 9,4 m2. Sn lng than o l chun b c tnh nh sau:

Acb = (800.7,8 + 800.7,8 + 780.5,6 + 132.9,4).1,63.0,8 = 23588 (T).

Vy t l tn tht than theo cng ngh c xc nh nh sau:

( = = 12,8 %.

13. Chi ph g cho 1000 tn than khai thc

Theo thng k t thc t sn xut cc l ch chng gi gi thu lc di ng, ta ly chi ph g cho 1000 tn than khai thc l 5 m3. n gi 1 m3 g l 450000 , vy chi ph g cho 1000 tn than khai thc l:

Cg = 5.450000 = 2250000 .

14. Chi ph li thp cho 1000 tn than

Li thp B40 c s dng tri nc l ch, din tch li thp cn thit cho mt chu k c tnh nh sau:

Sth = 1,05.Lc.r = 1,05.132.0,7 = 97,02 m2(trong cng thc trn, 1,05 l h s tnh n phn u ni gia cc on li thp; Lc l chiu di l ch, Lc = 132 m; r l tin l ch sau mt chu k khai thc, r = 0,7 m).

n gi 1 m2 li thp l 9000 , vy chi ph li thp cho 1000 tn than l:

Clt = = 1056351,3 ().

15. Chi ph mt l chun b cho 1000 tn than khai thc

khai thc l ch va 7 cn phi thi cng khi lng ng l chun b bao gm: l dc va vn ti; l dc va thng gi; l song song chn vi chiu di ca mi ng l l 800 m; l ct ban u to l ch vi chiu di 132 m.

Vy tng khi lng ng l chun b l: (Lcb = 3 . 800 + 132 = 2532 m.

Sn lng than khai thc c t l ch: Alc = 472343 (T),

Sn lng than ly t cng tc o l chn b: Acb = 23588 (T),

n gi o mt mt l chun b l 5500000 /m, vy ta c chi ph o l chun b:

Ccb = = = 28080519 ().

16. Chi ph khu hao trang thit b

- S gi thu lc di ng cho l ch l 146 gi, n gi 28800000/gi

- S lng ct chng thu lc n DZ-22 l 110 ct, n gi 1925000/ct

- S lng x DFB-3600 l 20 x, n gi 1618000/x

- Thi gian khu hao l 4 nm: 4.300 = 1200 ngy, sn lng than khai thc mt ngy m l 826,6 tn/ngy-m.

Vy chi ph khu hao s l:

Ckh = = 4485 /tn.

17. Chi ph bo him x hi

Theo ngh nh 43 CP v thng t 19-TT-L, trch bo him l 19% tin lng, do vy chi ph bo him c tnh:

CBHXH = 19%. Cl = 0,19. 22066 = 4193 (/tn).

18. Chi ph sa cha thit b

Chi ph sa cha c ly bng 30% chi ph khu hao thit b:

Csctb=30%.4485 = 1345 /tn.

19. Gi thnh khai thc mt tn than

tnh gi thnh khai thc mt tn than ta p dng cng thc sau:

C = CBHXH + Cl + Ctn + Ck + Cd + Cg + Clt + Ccb + Ckh + Csctb ().

Trong :

CBHXH: Chi ph bo him x hi, CBHXH = 4193 (/t);

Cl: Chi ph tin lng, Cl = 22066 (/t);

Ctn: Chi ph thuc n, Ctn = 2665,86, (/t);

Ck: Chi ph kp n, Ck = 5030 (/t);

Cd: Chi ph du nh tng, Cd = 2322 (/t);

Cg: Chi ph g, Cg = 2250 (/t);

Clt: Chi ph li thp, Clt = 1056 (/t);

Ccb: Chi ph o l chun b, Ccb = 28080 (/t);

Ckh: Chi ph khu hao thit b, Ckh = 4485 (/t);

Csctb: Chi ph sa cha thit b, Csctb = 1345 (/t).

Cng cc mc chi ph trn ta c: C = 70355 (/t).

III.4.8.Bng tm tt ch tiu kinh t-k thut l ch

III.17. Bng tm tt ch tiu kinh t- k thut l ch.

SttTn ch tiun vKhi lng

1Chiu dy vam7,6

2Chiu cao lp khum2,2

3Chiu cao lp than thu him5,4

4Gc dc trung bnh ca va than 28

5Th trng thantn/m31,63

6Chiu di trung bnh ca l chm132

7Tin l ch sau mt chu km0,7

8Sn lng than l ch mt chu ktn826,6

-Than khu gngtn298

-Than thu hitn528,6

9Thi gian hon thnh mt chu kca3

10Nhn lc hon thnh mt chu kngi66

11Sn lng trung bnh hng nm ca l chtn/nm200 000

12Chi ph kp n cho 1000 tn than khai thcci/1000 T594

13Chi ph thuc n cho 1000 tn than khai thcKg/1000 T157,4

14Chi ph g cho 1000 tn than khai thcm3/1000T5

15Chi ph li thp cho 1000 tn than khai thcm2/1000 T97

16Chi ph nh tng cho 1000 tn than khai thcKg/1000 T231

17S mt l chun b cho 1000 tn than khai thcm/1000 T5,1

18Chi ph khu hao thit b chng gi/tn4485

19H s hon thnh chu k-0,9

20Tn tht than%12,8

21iu khin vchPh ho ton phn

B. KHu THAN BNG MY KHU ,CHNG GI BNG GIN T HNH IU KHIN VCH BNG PH HA TON PHNIII.4.9 Phng php khu than trong l ch Qua nghin cu cc thit b c gii ho khu than ca cc nc, vi cng c tnh k thut ca thit b th thit b ti Trung Quc c gi thnh r nht v k thut khai thc hm l ca hai nc c nhiu tng ng nn n quyt nh la chn thit b ng b ca Trung Quc.

Khu vc p dng l va 7 mc c dc trung bnh l 280, lc khng ct dao ng di 300 Kg/cm3 kt qu nh gi c th p dng c i vi iu kin ca va 7 khu II Cnh G m than Vng Danh.

Vy n ny quyt nh la chn my MG 150/375 WBng III-15 c tnh k thut my khu than MG 150/375 - WTTTn ch tiu k thutn vTr s

1Chiu cao khuM1,3( 2,85

2Bc khuM0,63

3Gc dc va ti a35

4Lc koKN350

5Tc di chuynm/pht375

6Phng thc di chuynThu lc

7Cng sut ng cKW664/1140

8in pV1,25; 1,4; 1,6

9ng knh tang khum40; 46; 52

10Tc tang khuVng/ pht130( 310

11Chiu su khu nnmm200

12Lu lng nc yu cu lm mt mylt/pht-

13Chiu cao thn mymm1100

14Chiu di tang mymm1700

15Khong cch gia hai tay mymm5104

16Trng lngTn20

17Mng co ng bSGB-630/220

ng b my khu than MG 150/375-W, la chn mng co gng l ch kiu SGB-630/220. Thit b chng bi v lm mt my khu la chn bm nc m hiu XPB - 250/5,5 v b lc XPA. c tnh k thut bm nc XPB - 250/5,5 v b lc XPA xem bng III-16 v III -17.

Bng c tnh k thut ca mng co SGB-630/220Stt tn thng sn Vs lng

1Nng sutT/h450

2Tc bngm/s1

3Chiu di cng tcm150

4Chiu rng mngmm630

5Cng sut ng ckw220

6Trng lngTn118,6

Bng III-16 c tnh k thut bm phun sng m kiu XPB - 250/5,5.

TTThng s k thutn vS lng

1p sut bmMPa5,5

2Lu lnglt/pht250

3Cng sut ng cKw22

4in pV660

5ng knh Pistonmm50

6Trng lngKg1000

7Kch thc: di x rng x caomm1080x 750 x 745

Bng III-17: c tnh k thut b lc XPATTThng s k thutn vS lng

1p sut MPa5,5

2Lu lnglt/pht250

3Din tch lccm23000

4Mc lc(m180

5Trng lngKg500

6Kch thc: di x rng x caomm1500x750x890

1. La chn s b tr my tng ng vi mng co l ch:

c nhiu s b tr my khu tng i vi mng co.

a. My lin hp hot ng lung th nht cn mng co lung th hai.

b. Mng co v my lm vic u lm vic lung th nht

c. Mng co lung th nht, cn my lin hp khu than t ra di khu.

d. My lin hp khu than t trn khung mng co nm st gng.

S u tin thng c p dng cho my lin hp khu rng, mng co ng b d tho lp, hin nay khng cn ph bin.

S th hai, l s hon thin ca s th nht v khng c hng ct chng gia thn my lin hp v mng co l ch. Do khng c hng ct , dn n s gia tng mnh din bc l ca vch, v vy n nh ca n b suy gim.

S th ba, iu kin xc bc than ln mng co c ci thin ng k v to kh nng thun li duy tr chiu rng di khu n nh. Nhng s c khuyt im din l vch v tr my cng tc ng k, lm gim phm vi p dng ca n theo n nh ca vch.

S th t, s ny m bo tnh nh hng cho my, iu kin xc bc v t ct rch c ci thin. Nh , cng tc khu than c tin hnh vi tc cao.

Do n ny p dng s th t b tr cho l Ch ca khu vc p dng.

2. La chn s khu than

a) S mt chiu

L s c my khu khu than theo mt chiu t chn l ch cho n u l ch chiu ngc li l dn nn.

- u im:

+ C kh ho cng tc dn nn chiu i ngc v ca my lin hp, gii phng con ngi lung st gng, hn ch tai nn lao ng do l gng hay st vch v gim khi lng lao ng th cng 5(6 ln.

+ Khi quay v my ph v than mt ln na ly ht cc phn va cn st li nn l, to iu kin di chuyn mng co v pha gng.

+ chiu khu than, cng nhn lm vic trong lung gi sch, chiu dn nn than c phun ti mt ln na do lm gim ng k lng bi trong l ch.

+ Hiu qu tho kh t nhin mt gng c nng cao, do c thi gian dnh quay u my.

+ Gim thi gian cn dnh cho cc cng on cui

- Nhc im

+ Thi gian hot ng ca my cho mt di khu gia tng

+ Tng hai ln qung ng di chuyn ca cc th my.

+ Vi va c gc dc nh hn 60, cng tc dn nn ch hiu qu khi l ch dch chuyn ngc chiu dc v ngc li km hiu qu khi chuyn xui chiu dc.

b. S khu than hai chiu.

L s my khu c th khu than hai u l ch mi lt dch chuyn ca my khu thc hin c mt di khu.

+ u im:

Thi gian hot ng cho di khu ca my t.

Qung ng di chuyn ca th my nh

Cng sut l ch sau mt chu k ln.

- Nhc im

+ Khi khu than ngc chiu gi sch, cng nhn l ch ri vo tnh trng nhim bi nng n.

+ Hiu qu tho kh t nhin b suy gim nhng va c tho kh cao.

Qua nghin cu cha kh trong than khng thy i kh metan, cc va than nm trong i phong ho nn s khu hai chiu l hp l.

3. Tnh s lung khu trong mt chu k.

Cng thc tnh:

(lung)

(III-20)

Trong :

r- Tin l ch sau mt chu k r = 1,26m

rTK Chiu rng ca tay khu rTK = 0,63

Thay s ta c

nLK = 2 lung

4. Thi gian khu ht mt lung

Cng thc xc nh

TLK = TK + Tcb,

(pht/ lung)

(III-21)

Trong :

TK - Thi gian my khu ht mt lung khng k thi gian to lung khu.

(pht/lung)

LC: Chiu di l ch LC = 132m

vtb: Vn tc trung bnh ca my khu khi khu

vtb = 3m/pht

Thay s ta c: TK = 44 pht

Tcb- Thi gian chun b khu lung mi l thi gian to bung khu v thi gian ca cng on cui ca l ch.

Tcb = 30 pht

Thay vo (III-21) c: TLK=74pht

5. Cng tc khu ca my Combai

loi b cng tc to bung khu hai u l ch bng khoan n mn, my khu than MG 150/375-W c trang b thit b t to bung khu trc khi khu lung mi. Cng vi cng tc m lung mi, cng tc dch chuyn mng co, dng v chng tng cng u l ch tip gip vi l chun b, di chuyn b truyn ng ca mng co cng c tin hnh.

Cc bc to bung khu nh sau:

I. Tm cht ti c tho d cch u l ch 10-15m.

Trc khi my khu v n u l ch. Lc tang khu (2) nm st vch va cn tang khu (1) nm st tr va. Lp than va bng chiu di thn my cha c khu.

II. Tang khu (2) pha vch c h xung tr va.

6. H chiu khu.

H chiu khai thc than bng my com bai th hin trong hnh (Hnh XIII ) III.4.10. Hnh thc vn chuyn hp l trong l ch

Than sau khi tch ph c mng co a xung thit b vn ti l dc va sau i ra l xuyn va tng ri ti sn ging v c bng ti a ra ngoi mt t.

III.4.11. Phng php chng gi trong l ch

1. p lc ln lung khai thc.

Tnh tng t nh phng n I.

Pga = 47,9 T/m

2. p lc tc dng ln khu bo v.

Tnh tng t nh phng n I ta c: Pph = R +R , T/m

* p lc ca vch trc tip tc dng ln v chng ph ho

R = , (Tn/m)

(III-13)

(1 = 2,6 T/m3.

h1 = 6m. Chiu dy vch trc tip;

: Gc dc ca va : = 280 b Chiu rng l ch, b = 2 m.

ls Bc ph ho thng k, ls = 0,63 m.

Thay s vo III-13 ta c R' = 23,84 T/m.

* p lc ca vch c bn tc dng ln v chng ph ho

R = , (T/m)

(III-14)

T- Tr s p lc do s vng ca vch c bn truyn qua lp vch trc tip tc dng ln v chng ph ho.

Thay s ta c T = 6,72 kg/cm = 0,672 T/mR= =0,87 T/m.

Vy tng p lc tc dng ln v chng ph ho l:

Pph = R +R = 23,84 + 0,87 = 24,71T/m.

* Ti trng dc gng khai thc:

Pdg = Pga + Pph = 47,9 + 24,71 = 74,41 T/m 3. Chn vt liu chng gi l ch

Cng tc chng gi l ch c thc hin bi dn chng t hnh VINAALTA 2.0/3.15 p dng h trn cho va 7 thuc khu II Cnh G p ng yu cu chng gi.

Bng c tnh k thut ca dn chng VINAALTABng III-18

S lng dn chng VINAALTA 2.0/3.15 v ZZ 3200/16/26. Dn chng VINAALTA 2.0/3.15 c s dng chng gi gng l ch cn dn ZZ 3200/16/26 chng l ch v tr st l dc va thng gi v l song song chn.

S dn chng

LC: Chiu di l ch LC = 132m

a: Khu lp t dn chng a = 1,5m

Vy

dn

V tr st l song song chn s dng 2 dn chng, v tr st l dc va thng gi s dng 3 dn chng ZZ 3200/16/26 (Tng cng l 5 dn ZZ3200/16/26).

Trong gng l ch s dng 88 dn VINAALTA 2.0/3.15- S lng ct thu lc n DZ-20 v DZ-22 s dng trong qu trnh tng cng ng ba l ch v l chun b v x l s c. Khi lng 120 ct.

- S lng x 60 x

5. H chiu chng gi l ch. (Hnh XIV ) III.4.12. iu khin vch

iu khin vch bng phng php ph ho ton phn trc khi vch sp th lp than nc s ri trc sau mi n lp vch. Vic iu khin vch cng lc vi vic di chuyn v chng.

Chn s dch chuyn v chng: s ni tip dch chuyn cc on v sau my lin hp hoc cch mt khong un cong ca mng co, y mng co un dn vo gng ngay sau my lin hp.

Lin sau, vic chng di chuyn th lp than nc ri xung tm chn pha sau ca v chng c b tr b phn thu hi than vo bn trong l ch. Sau vch s sp .

III.4.13 T chc chu k sn xut trong l ch

T chc cc cng vic trong l ch khai thc c gii ho ng b c tin hnh nh sau:

Mt chu k khai thc gm 3 ca (mi ca 8 gi) trong mi ca s thc hin 1 chu k v khu 2 lung.Cui mi ca s thc hin bo dng thit b my mc

Ca khu than gm:

- Cng c l ch

- Vn hnh my khu MG 150/375-W

- Nng c cu gi tm nc

- y mng co un

- Di chuyn dn chng

- Vn hnh bm dung dch nh ho

- Vn hnh bm phun sng

- Trc bn iu khin

- C in

- Ch o sn xut

- Cng on cui ca l ch.

Ca chun b gm:

- Cng c l ch

- Kim tra bo dng thit b

- Thu hi v chng chun b

- Ch o sn xut

- C in

- Trc ban iu khin

1. Khi lng cng vic trong mt chu k

a. Vn hnh my khu

Trong mt ca khu than my khu s khu c mt chu k .nh vy mi chu k s c hai lung khu vi chiu rng mt lung l 0,63 m ,c chu k l 1,26 mb. Nng c cu gi tm nc

Cng tc ny c thc hin trn sut chiu di l ch l 132m v ni tip sau cng tc nng c cu gi tm nc. Thc hin trn 1120m.

d. Cng tc thu hi ct

Sau mt lung khu ta tin hnh thu hi ct chng tng cng chn v u l ch e. Cng c l v bo dng thit b.Cng vic c thc hin thng xuyn trong c 3 ca: 132x 3 = 396m.

Cng tc bo dng thit b c thc hin cui mi chu k khai thc (sau mi ca)

f. Di chuyn dn chng v thu than nc: 1120m.

2. Xy dng biu t chc chu k sn xut

a. Xc nh s lng cng nhn cn thit thc hin cng tc.

Cng thc xc nh

(cng nhn);

Nid: S cng nhn cn thit hon thnh cc cng vic trong chu k

Ni: S cng nhn tng cng vic theo nh mc

i: S lng cng vic th i

ngi

Trong :

Vi: Khi lng cng vic theo i

Di: nh mc lao ng, ng-ca

Bng III-19

TTTn cng vicKhi lng Vinh mc Di/cngNi

Ca ICa IICa III

1Khu than (lt)617,80,450,45-

2Nng c cu gi tm nc (m)11204622,20,2250,225-

3Di chuyn mng co (m)11202311,10,450,45-

4Thu hi ct (m)10,082,24--4,5

5Cng c l ch (m)396306,72,252,252,25

6Di chuyn dn chng v thu hi than nc (m)11206701,671,67-

7Bo dng (m)1328--16,5

8Cng on cui (lt)80,869,39,3-

9Vn hnh trm phun sng (m)132751,861,861,76

10Vn hnh mng co, trm dch(ngi) 3ca666-

11C in (ngi)3ca2/ca222

12Cng c tuyn mang+ tiu than l ch(tn)6544-

(28,228,228,11

Vy Nid = 84,51 ngi

Ta chn tng s cng nhn thc hin cho c chu k l 66 ngi. Nh vy trong qu trnh lm vic mi cng nhn phi thc hin cng vic vi h s vt mc l:

Ta chn HVm = 1,28

Nh vy ta b tr mi ca 22 ngi.

b. Xc nh thi gian hon thnh tng cng vic

Cng thc xc nh

gi

Bng III-20: Bng b tr lng cng nhn cho tng cng vic v thi gian tng cng vic

TTTn cng vicNiNitT (h)

Ca ICa IICa IIICa ICa IICa III

1Vn hnh my khu0,450,45-22-1,375

2Nng c cu gi tm nc0,2250,225-22-1,375

3Di chuyn mng co0,450,45221,375

4Thu hi ct4,537,5

5Cng c l ch2,252,252,252237,5

6Di chuyn dn chng v

Tn thu than nc1,671,67-44-1,375

7Bo dng thit b--17,5--127,5

8Cng on cui l ch9,39,3-(12)(12)-0,5

9Vn hnh trm phun sng1,761,761,7622-7,5

10Vn hnh mng co, trm dch66-22-7,5

11C in2222227,5

12Cng c tuyn mng + tiu than l ch4444427,5

(16,816,816,8222222

c. Biu t chc chu k sn xut v biu b tr nhn lc l ch

III.4.14. Tnh ton cc ch tiu kinh t k thut c bn.1. Sn lng mt lung khu.

Q1 = m. (.r. lc. C

(tn)

Trong :

m Chiu dy lp khu

m = 2,5m

( - T trng than

( = 1,6 T/m3r- Chiu rng lung khu

C H s khai thc, dng combai C = 0,95

Q1 = 2,5.1,6 . 0,63 x 132 x 0,95 = 316 T

2.Sn lng mt lung thu hi than h trn.

Q2= m2..r.L.K2 ;tn.

m2, Chiu dy lp than thu hi, m2 = 5,1 m.

K2: H s thu hi, K2= 0,7.

Q2= 5,1.1,6.0,63.132.0,7=475 Tn

3. Sn lng chu k

Mt chu k khai thc gm 2 lung khu QCK = 2.(Q1 + Q2) = 2.(316 + 475) = 1582 tn

4.Sn lng l ch 1 ngy m

Qng=.Nca.K ; T/ng

K: h s hon thnh chu k, K= 0,8.

Nca: s ca khai thc trong mt ngy m, Nca=3 ca

Nck: s ca hon thnh chu k Nck=1.

Qng = 3.0,8 = 3316 T/ng.5. Sn lng l ch theo thng

Qthng = Q ng-m . ntnt: S ngy lm vic trong thng nt = 25 ngy

Qthng = 3316 .25 = 82900 T/thng

6. Cng sut l ch

Qnm = Qn . nn . KlKl: H s tnh n cng tc lp t v thu hi l ch khi chuyn din khai thc, Kld = 0,85

nn: S ngy lm vic trong nm 300 ngy

Qnm = 3316.300.0,85 = 756 480tn/nm

Lm trn ly Qnm =75