CONE; ROA \ A 1 - 101 Ct NORIA viCiT \A\!

D6c i p Tu. do - Hanh phut

DoA N caNG NC I MAN- KHOANG S.AN V1}:„ AM

cONG Ty TNHH MOT THANI-1 Vifs:N THAN UONG HI - VINACOMIN UOng Bi. ngen . 2012

S6: 24.0 / TUB-KTCN-MT V/v tra to trinh s(5 1723/11 --THT ngay 24/5/2012 c6a Cong ty than H6ng Thai

Kinh COng ty TNHH MTV than Hong Thai.

Can dr vao Quy dinh phan cap quin 1ST k9 thuat trong cOng tic didu hanh cita TO hop

Cong ty INHEI MTV than Uong BI - Vinacomin ban hanh kern theo Quyet Binh s6: 41/QD-

TUB ngay 05 thing 01 nam 2011 cna TOng Giam d6c Cong ty than Uong BI- Vinacomin;

Xet to trinh s6: 1723/TTr-THT, ngay 24 thing 5 nam 2012 cila ang ty than Hong

Thai V/v xin phe duyet bao cao danh gia ke't qua ap dung thir nghiem cong nghe khai

thac sir dung gia khung di dOng GK1600/1.6/2.4/HTD tai le cho via 24 mitt +30-:-10

via - COng ty TNHH MTV than HOng Thai.

Theo bao cao tham dinh cUa Cong ty than Uong BI - Vinacomin.

rang giarn d6c Cong ty than liOng BI - Vinacomin tra to i nhtr sau:

1. Thfing nhgt voi not dung thus hien trong bao cao do Vien KHCN MO -

Vinacomin lap gom cac not dung sau: - Dinh gia dac didm didu kien dia chat Icy thuat m"6 khu virc lap du . an

- Cac giai doan thqc hien tridn khai dir an.

- Qua trinh tridn khai khai that thir nghiem.

- Danh gia ket qua ap dung thir nghiem.

- Kd hoach tridn khai ap dung trong theci gian toi.

- Kdt lu'a.n, kidn nghi.

2. Giao cho Cong ty than H6ng Thai t6 chic tridn khai thtfc hien cac Int& tie-p

theo thing quy dinh.

3. Giao cho cac PhOng: P.KTCN-MT, P.DDSX, P.AT-BHLD, P.Co dien, P.Dau

tit, P.KHVT COng ty than Uong BI - Vinacomin dOn d6c, kidm tra, giarn sat Cong ty

than Hong Thai trong qua trinh tridn khai thu.c hien./.

Noi nhein: - Niitr kinh - Cac phong: DDSX; DT; CD; AT - BHLD; KHVT; - Lu'u KTCN-MT; Van phong, (S..07).

gee 1.21thfif

(TONG HO• HO CHI: NGHIA vifj NAM Doc Lag - Tu do - Hanh pink

UOng Bi, ngay .,14 dicing 7 mini 2012

TAP DOAN LONG NGFIE(1) THAN - KHOANG SAN vi0- NAM

CONG TY TNHH MOT THANH VIEN THAN LONG BI-VINACOMIN

BAO CAO TRAM DINH Ve Bac) aro dank gia kei qud ap dung Ma' nghiOni cong ng4 khai iliac dung

gia khung they lyc di dOng GK1600/1.6/2.4/HTD tai 10 cho' via 24 1771k +30-:-10 via Cling ty TNHH MTV than Hong Thai.

Kinh giri: Ong T6ng Giam d6c Cong ty TNHH MTV than liOng Bf - Vinacomin

Sau khi xem xet h6 so. bdo cdo danh gid ket qua dp dung thir nghiem cong nghe khai that six dung gia khung di Ong GK1600/1.6/2.4/HTD tai lo chic( via 24 milt +30-:-lo via - COng ty TNHH MTV than H6ng Thai do Vien KHCN MO - Vinacomin lap, P.KTCN- MT t6ng hop bdo cdo T6ng gidm doc not dung thgm dinh nhu . sau:

I. Can dr thAm dinh: Nghi dinh s6: 209/2004/ND - CP, ngay 16 thang 12 nam 2004 cila chiral phi' ve

quit-14/ chat luong xay dung cong trinh; Nghi dinh s6: 12/2009/ND - CP, ngay 12 thang 02 nam 2009 cila chiral phil ye

quan ly dix an dau tu' xay dung cong trinh; Quy chu'gn ky thuat qu6c gia ve an town trong khai that than ham 1o: QCVN

01:2011/BCT; Dix an dau ttx nang ding suit len 600.000 tan/nam khu Trang Khe II; III -

Cong ty than H6ng Thai, do Cong ty c6 phan tu van Dau ttx mO va Ong nghiep lap. Dix an dau tu' ap dung gid khung di dOng trong cOng nghe khai that cot dai

theo phuong cho cdc via than c6 g6c d6c den 45 ° tai Cong ty TNHH mot thanh vien than H6ng Thai - Cong ty TNHH mot thanh vien than UOng BI - Vinacomin, do Vien KHCN MO - Vinacomin lap thang 3/2008.

Hop d6ng t6ng thdu EPC s6 241/HD-KHVT ngay 15/8/2008 gifta Cong ty than H6ng Thai va Vien KHCN MO - TKV V/v thuc hien g6i thdu EPC: Thies ke, cung cap thiet bi , vat tu, dao tao va chuydn giao cong nghe khai that cOt dai theo phuong b'ang gid khung di Ong cho cdc via than c6 goc d6c den 45 ° tai Cong ty TNHH MTV than Hong Thai thu6c du an dau ttr dp dung thir nghiem gia khung di dOng trong cong nghe khai that cot dai theo phuong cho cac via than c6 goc d6c den 45 ° tai Cong ty TNHH MTV than Hong Thai - Cong ty than U6ng 13f - TKV;

Hop (Tong tu van thiet ke s6 328:/HD-KITH ngay 10 thang 12 nam 2009 giira cOng ty than Hong Thai va Vien KHCN MO - TKV ve viec "Nghien ciru Ikra chon Ong nghe khai that hop 15, cho via 24 mix +30/LV - khu Trang Khe theo huong (trig xir nhu than có tinh tu' chay va lap thiet ke ban ye thi cong cOng nghe duo'c Iva chon".

Thie't Ice ban ye thi cong clir an dau ttx dp dung gia khung di dOng trong cOng nghe khai that cOt dai theo phuong cho cdc via than c6 goc d6c den 45 ° tai Cong ty TNHH mot thanh vien than Hang Thai - Cong ty TNHH mot thanh vien than UOng

BI - Vinacon-!;;I, do - Vinacomin lz:tp thin ')/2008. COng <u so: 752/TIDUSX-KCM rq...Y. ay 16 thing 11 nam 2010 curl GiIm (16::

Trung tam (lieu hanii fan xual tai Quang Ninh V/v kien Wain gia TKKT-TC ho sung cho via 24 - Khu Trang Khe.

Quyet dinh s6 2085/QD-TUB ngay 18/7/2011 cua Ong ty than tong BI — Vinacomin V/v phe duyet thi'et ke nghien cdukra chon cOng nghe khai thac hop 19 cho via 24 mdc +30/LV-Khu Trang Khe theo huang Ling x.ir nhu . than có tinh ti,r chay va lap thiet ke ban ve thi cOng cOng nghe duoc kra chon;

Xet OtrInh s6: 1723/f lr-THT, ngay 24 thing 5 nam 2012 dia. Ong ty than Hong Thai V/v xin ph8 duyet bao cao danh gia k6t qua Ai) dung thir nghiem cong nghe khai thac sir dung gia khung di Ong GK I600/1.6/2.4/HTD tai 16 cho via 24 mdc +30-:-lo via - Cong ty TNHH MTV than H6ng Thai.

II. NOi dung tham dinh:

1. Ten bao cao: Dinh gia k6t qua dp dung thir nghiem cong nghe khai thac sir dung gia khung di Ong GK1600/1.6/2.4/HTD tai 16 chg via 24 milt +30-:-1Q via -Cong ty TNHH MTV than H6ng Thai.

2. Chu dau tu: C6ng ty TNHH MTV than Hong Thai. 3. Don vi lap a coring: Vien KHCN MO - Vinacomin. 4. NOi dung va muc tieu bao cao: 4.1. Dinh gia rkic diim diesu kien dia cluit ky thutit me') khu vu'c kip du' - Lo cho 11-24-3 (g6m 16 chon 11-24-3-1 va 11-24-3-2 canh Tay) mdc +30 ÷

+126 via 24, gidi han tir phay F.129 d6n tru bao ve 16 xuyen via mdc +30 c6 chieu day via thay d6i td 1,8 + 2,1m, trung binh 2,0m; goc d6c via thay d6i tit 36 ° + 42° , trung binh 40°; chi& dai theo phrong khai tilde khoang 930m; chi& dai theo twang d6c trung binh khoang 140m. Vach true ti6p ciia via Om set k6t, set than phan lop mang vdi chieu day trung binh khoang 0,8m. Nam phia ten tap da m6m la tap bOt k6t phan lop mang, dai ch6 xen kep set k6t, chi& day tir 1,2 ÷ 8m. Vach trkrc ti6p thuOc loai . On dinh trung binh. Vach co, ban la cat k6t xen kep bQt k6t voi tong chi& day td 5 ÷ 22m, c6 ch6 day 32 m, trung binh 12m. Da vach thu0c loai On dinh, sap d6 trung binh d6n kho sap d6. Cueng dQ khung nen tit 43,6 ÷ 76,2 MPa, trung binh 68,4 MPa. Da tru trut ti6p: thanh phan chu y6u la b6t k6t, chi& day thay d6i tir 6 ÷ 14m, trung binh la 12m. arong d6 khang nen trung binh 6n = 46,4 MPa. Trong luong the tich 2,63 T/m3. TrCt luong dia chat caa khu vqc khoang 323.100 tan.

- Lo cho' 111-24-1 a (canh DOng) mdc +126 ÷ +200 via 24, gidi han td T.XIII T.XIV khu Trang Khe III co chi6u day via thay d6i tir 1,8 + 2,3m, trung binh 2,1m, g6c d6c via thay d6i tir 36° + 42°, trung binh 400; chieu dai theo phuong khai thac khoang 320m; chieu dai theo huOng d6c trung binh khoing 95m.

- Le cho 111-24-2 (canh Dang) ink +30 ± +126 via 24, gidi han tir T.XIV d6n tru bao v8 16 xuyen via thong gio mdc +126 khu Trang Khe III c6 chi6u day via thay d6i tir 1,7 ± 2,1m, trung binh 1,9m; g6c d6c via thay d6i t.1' 36 ° ÷ 42°, trung binh 40° ; chi& dai theo phuong khai thac khoang 840m; chieu dai theo huong d6c trung binh khoang 127m.

V•Lich t'il't' iii C:11(: 111-24- Li. ill-24-2 is tap da \ C_t

kC:t \c Lin set tilUt co (Rt ∎ ' ;rung khoang 1.2m: ohLI tren

hOt kit phan bo 3.5 -:- int. VA(_1 trisc tiO thuOc loai On dinh trung Mutt Gn 25.8 61.6 MPa, trung hilib anal = 40.2 MPa. \hid' co ban lit tap hOt k6t xen czit k6t. sari ket day 7,6 + 18.5 m. trung binh 12.5 m. Vach co ban thuOc loai sap d6 trung binh den kilo sap dO, an = 62,8 4- 97,9 MPa, trung Binh antb = 78,2 MPa. Tru trio ti6p la lop* k6t xen lan cat k6t day tit' 3,4 + 8.6 m thuOc loai b8n yang trung binh d6n b8n yang. Trir luong dia chat cUa khu \rut hai lo cho' tren khoang 410.585 tail.

- 1.6 chi III-10-1 milt +90 + +150 va to cho 111-10-2 mire +30 + +90 thuOc via 10 khu •Trang Khe III, giai han tit phay F.15 d6n tuy6n T.XV co chi8u day via thay dOi tir 1,7 + 2,4m, trung binh I,8m; gOc d6c via thay doi tir 31 ° ÷ 33° , trung binh 32°; chi& dai theo phuongkhai thac khoang 350m; chieu dai theo Inrong d6c trung binh khoang 110m. Vach true tip caa via Om lop set ket phan b6 khOng deu di8u day ttr 0,1 -:- 0,6m, ti6p tren do la tap bOt k6t phan b6 deu day dr 3,2 + 7,6m. Vach true ti6p thuOc loai on dinh trung binh. Vach co ban la lop cat k6t, bOt k6t phan b6 deu day tir 6 -:- 20m. Vach co ban thuOc loai sap clO trung binh CO ctrong dO khung nen tit' 40,6 + 83,2 MPa, trung binh 72,6 MPa. Tru true ti6p cua via la cac lop set k6t xen kep set than, nlii8u ch6 xen kep lop than mOng co chi& day tix 0,3 + 0,7m. Tru true ti6p thuOc loai kern b8n yang d6n lo8n \rang trung binh. TAT luting dia chat dia khu vile hai 16 char tren khoang 255.479 tan.

Tuy nhien, thut t6 trong qua. trInh dao Io va khai thac cho thay, do bi6n dOng dia chat phut tap, mire dO bi6n ging chieu day via trong khu \Tut 16n, tai nhi8u vi tri chi8u cao khau gtrong lo chop chi can 1,5 + 1,7m, trong via xuat hi6n lop kep Ia bOt k6t eting có chieu day tai 0,6m. Ngoai ra, 16p vach true ti6p tren via than la set k6t xen kep cac lop than mOng, me'm y6u có chieu day tir 0,28 + 6,5m, trung binh 4m. Phca tren 16p set la lap bOt k6t. cling chi8u day tir 4 -:- 5m, phia tren lop bOt la lop sin k6t co chieu day trung binh 10m. Trong qua trinh khai thac, lap set k6t a- sap Iey va tach lop khi khai thac dale cl6n hi6n tu'ong rung noc, mat dp Nit nen khung ch6ng trong khi gOc d6c 16 cho' Ion (co ch6 cuc 100 len d6n 44 °). Mat khac, lop bOt k6t va. sin k6t sap do' sau lOp set k6t tao xung lire tic Ong cue 130 len cac vi ch6ng lo cho' gay kilo khan cho cling tic khai thac.

4.2. Ccic giai doan thu'c hie:n triin khai du an.

- Giai don lap du an ddu tu': De khai thac phan trir Wong cac via than co chi8u day trung binh, goc d6c d6n 45 ° dam bao an town va hi6u qua, COng ty than HOng Thai da de nghi va thong nhat ky k6t hop dong kinh t6 voi Vin KHCN MO s6 129/HD-KHVT ngay 25/4/2008 V/v: Lap du an elk to ap dung thir nghi6rn gia khung they lire di Ong trong cOng ngh6 khai thac cOt dai theo phuong cho cac via than co gOc d6c d6n 45 ° tai Ong ty TNHH MTV than H6ng Thai - COng ty than L;Ong 13f - Vinacomin. Theo do, Vin KHCN MO ti6n hanh khao sat, lap der an dau tu va da du'o'c Giam d6c COng ty than Hong Thai phe duy6t tai quy6t dinh s6 1040/QD-CT'CT ngay 03 thing 05 nam 2008 v6i tong mac cifin nr 28.743 tri6u dOng, cOng suit thi6t k6 185.000 T/nam, suit dau to caa du an 155.000 dong/rin, gia tri hien tai thu'c (NPV) 4.993 tri6u dOng, thai gian hoan von (T) 3,74 nam va ti 14 lai nOi tai (IRR)

khu auv Amig vito tricit khai =_It,:fig (hit' [ighieni tr ag dt. r (iiu6e \fa 24 via 10 khu Trang Khe II. tOrig- trd luvng dia cha't flu) . (Ring Et 1.064.476 trCt luong cong nghiep la 935.820 th. Khu vkrc kien zip dung dau tien is 16 cho 11-24-3-1 (dinh Tay) mCrc +30 ÷ +126 via 24. khu Trang Khe II.

- Giai doan lisp thia k6 ban ye thi cong: Tren co so' du an dau tu' du ctuot phe duyet, Cong ty than Hong Thai va Vien KHCN MO k/ ke't hop (long ton` thau EPC s6 241/HD-KHVT ngay 15 tiling 8 nam 2008 VA/ "Thiel k6, cung cap thi6t bi vat tu, dao tao van hanh chuy6n giao cong nghe khai thac cot dai theo phuong bang gia khung thUy Itsc di dOng cho cac via than co goc d6c den 45 0 tai Cong ty TNHH MTV than Hong Thai". Theo do, Vien KHCN MO tien hanh lap thi6t k6 ban ye thi cong du an dau tu' dp dung thenghiem gia khung thdy Itrc di dOng trong cong nghe khai thac cot dai theo phuong cho cac via than c6 g6c d6c d6n 45 ° tai Ong ty TNHH MTV than Hong Thai - Cong ty than t;Ong BI - Vinacomin. Thi6t k6 da cluot Giam d6c Cong ty than Hong Thai phe duyet tai quy6t dinh s6 134/QD-DTXDCB ngay 16/1/2009. Khu visc lua chon thi6t k6 ap dung this nghiem gia khung thily luc di d6ng dau tien thuOc 16 chg 11-24-3 via 24, khu Trang Khe II milc +30 ÷ +126.

4.3. Qua trinh trim khai khai iliac dui nghiem.

4.3.1. Giai doan khai thac dau den (chieu dai to char thud t6 147m): Giai doan nay 16 chg lap dat gia khung xong va tien hanh di6u khi6n da vach

ban dau cho 16 chg gia khung bang cac cup phi hOa. khoang cach cac alp theo chi6u d6c 16 chg 8 rn, chieu dai moi alp ar 6 ÷ 8 m. Sau khi di6u khi6n da vach xong quan sat that' tinh trang 16 chg gia khung khOng 6n dinh. Lo chg bi tut noc, ncr guong tai nhi6u vi tri clan d6n cac gia khung trong 16 chg bi xieu veo, x6 dat. Cac khung ch6ng 16 cho bi x6 lech, chi6u cao chOng girth) chg kh6ng dam bao (co doan gia khung chfing khOng tai vach 16 cho trong khi c6 doan do than tut to dan d6n chi6u cao 16 chg chi dat 0,8 ÷ 1,2m khOng dam bao khung gian lam viec. D6 khac phuc, Vien KHCN MO da ph6i hop vii Cong ty than Wing Thai lap cac bien phap xis . 1/ nhix ding c6 toan tuy6n girong 16 chg bang cach dinh b6 sung cot dap tang arang bang cot thiay luc don.

Sau khi town tuy6n guong 16 chg da." ding c6 va khoi phuc, lo chg bat dau dugc van hanh khai thac va d6n ngay 6/5/2009,16 cho khau theo phuong vuot khOi thisong lap gia dugc 1,6 m. Tuy nhien, ca 2 ngay 6/5/2009 da xay ra six c6 chay 16 tai vi trl gia s6 105, 106. De' dam bao an toan, Cong ty than Hong Thai rut toan b6 cong nhan trong 16 chq va cac khu vqc lien quan ra vi tri an toan (long thud dong dra dung khai thac. D6 xis 1/ str c6, Cong ty than HOng Thai tien hanh xay tuang chin cach ly va bum Ulf nito vao dap tat darn chay theo phuong an )(ill/ six c6 chay 16 chg 11-24-3 rridc +30 ÷ +120 khu Trang Khe II Ong ty TNHH MTV than Hong Thai, COng ty than Cong BI da dugc Tap Doan phe duyet tai bien ban lam viec ngay 6/5/2009 va ngay 18/5/2009. Theo su chi dao cua. Tap ctoan tai thOng bao s6 41/TB-TTDHSX ngay 25/5/2009, Cong ty than UOng BI, Cong ty than Hong Thai va Vien KHCN MO thing nhgt "Lap phuong an khai thOng chu'an bi va xirl/ 16 cho 11-24-3 mdc+30 ÷ +120 V24 khu Khu Trang Khe II - Cong ty than Hong Thai" (bien ban

II>ity I 3/7 ..;. 2 01(it, xJ.-1[152. Situ dá la thu hOi (lave 93

4.3.2. Giai down khai Ulric ling xii. nht than có kith chaff.

Tren co se. Thiel 1:6 va ciieu kien thtrc te". COng ty than liOng BI. COng ty than HOng Thai va Vien KHCN Mo th6ng shat chuy6n vi tr1 (tat khung sang lo thuong thOng giO mire +30 + +115 pi -11a tarot, vi tri lap dat gia kitting ti.• mdc +50 + +115 vai chieu dai khoang 72m. Doan le thtrong con lai mCrc +30 ÷ +50 (chieu dell

khoang 38 m) khOng lap dat gia khung, qua trinh khai thdc du'ot de lai lam tru bao ve lo xuy'en via mtic +30 N/A doc via than mdc +30 via 24.

Tren co so cac giai phap k9 thuat da th6ng nhat, Cong ty than Hong Thai da tien hanh khau rang them 03 luOng (03m) tir to thtrong thOng gi6 mdc +30 ÷ +115 ra phia ngoai de chudn bi cho cong tac lap dat gia.

TU ngay 5/9/2011 d6n ngay 22/9/2011 voi sty phai hop dm cac can be Vien KHCN MO, Cong ty than Hong Thai da hoan thanh cong tac lap dat gia khung thus) Ityc di dOng tai thugng thong gi6 +50 ÷ +115 (chieu dai 72 - m), tang sa gia khung dtrqc lap dat la 68 gia, kham &du va kham chars to dig duce thong bang vi chang cat thUy Ityc don xa hap. Trong khoing thoi gian tLr ngay 23/9/2011 d6n ngay 29/9/2011 ti6n hanh cOng tac cUng c6 town tuy6n lo chq (barn ba xung ap cac cat chang, danh cat dap thily lut don ch6ng tang cuing cac gia, can chinh cac cat ch6ng, x6p cui gia cuing mat s6 vi trf, khau ch6ng kham chart, kham dau) va that hien cOng tac pha Ilea ban dau de chudn bi dtra to chq vac) khai that thtrong k9. Cong ty than Hong Thai da chinh thirc dua to chq 11-24-3 Irak +50 ÷ +115 ch6ng giir bang gia khung thily Ityc di Ong vao khai that. Tuy nhien, to chq duy ter. khai that an .dinh trong thei gian khoang 3 thang (tit' dau thang 10/2011 d6n dau thang 1/2012) vol chieu dai theo phtrong khai that &roc khoang 140m thi xay ra six c6 x6 dat cac gia khung tai met s6 clop cira to chq.

4.4. Danh gui kei qud ap dung thti nghignz.

- Danh gia cac chi tieu kinh t6 k9 thuat dat dtrqc cua ding nghes. - Danh gid mdc dO an town cfra cong nghe. - Danh gia ye dOng bO thi6t bi gia khung. - MOt s6 kinh nghiem trong qua trinh trien khai cong nghe. - Nhdn xet: + Trong giai down tir thang 10 ÷ 12/2011, khi dieu kien dia chat khu vac an

dinh; viec ap dung so do cong nghe khai that cot dai theo phuong, khau than bang khoan no min, ch6ng giEr to cho bang gia khung thay lac di clang, dieu khien da vach bang phd has town phan 1a pha hop v6i dieu kien dia chat to cho 11-24-3 mdc +30 ÷ +115 via 24 khu Trang Khe. San strong than khai that va nang suat lao clang dat duot trong giai down nay IA cao so vol cac le chq co cung dieu kien tai vUng Quang Ninh.

+ Trong giai down to thang 1 ± 4/2012, khi dieu kien dia chat khu vtyc bi6n clang, viec ap dung so (VS cong nghe tren cho via 24 khu Trang Khe da gap cac Icho khan. San Wong va nang suit lao clang thap.

4.5. Ke" hogch tries khai ap dung trong thoi gian tai:

F1.011 2' vl-ce L'oilg LL (dl c•iicI 1ic au:

- Là chc 111-24-1 (cdnit DOng) ratic +126 + +20() va 16 cho 11.1-24-2 (canh DOng) mtirc —30 + +126 thu6c khu Trang Khe III via 24. Sau khi xem xet so d6 cap !that ciao 16 tai cac khu vuc teen thay rting, cac khu vcrc 16 dig c6 chieu day via thay di tir 1,6 2,1 in. trung binh 1,8 m. G6c cl6c via thay Oi tr 36 ° + 42° trung binh 40° (16 chq III-24-1 c6 g6c doc thay di cue b0 toi 50 °). Trong via c6 tir 0 + 1 lop Rep, chieu day lop da kep thay d6i tr 0 4- 0,14 m, thanh phan da kep Ia set ket, set than. Vach true tip cua via g6m set ket xen ln set than phan b6 deu tit 1,63 -:- 3m, c6 nai len den 7m de sap d6 trong qua trinh khai thac; phia tren la tap b6t ket phan b6 t 3,5 -:- 7m. Vach true tiep thu6c loai kern 6n dinh den 6n dinh trung blnh, an = 18,8 + 61,6 MPa, trung binh ontb = 40,2 MPa. Vach ca ban la tap b0t ket xen lan cat ket, san ket day 7,6 + 18,5 m, trung binh 12,5 m. Vach cci ban thu0c loai sap d6 trung binh den khó sap d6, G n = 62,8 + 97,9 MPa, trung binh cyntb = 78,2 MPa. Tru true tiep là 16p bOt ket xen ran cat ket day ta' 3,4 + 8,6 m thuO‘c loai ben \king trung binh den ben yang.

- Le chq III-10-1 mdc +90 + +150 va 16 chg 111-10-2 mdc +30 + +90 thu0c khu Trang Khe III via 10. Hi'en tai, 16 chq III-10-1 clang dugc mO khai thac theo he th6ng khai tilde c0t dai theo phuong, ch6ng gift 16 cho' bang cot thuy lut don xa khop. Lo chq 111-10-2 mire +30 + +90 theo ke hoach së thrqc chan bi khai thac trong th6i gian t6i. Theo hien trang cap nhat °nolo va khai thac cac khu vu'c 16 chq lan can cho thay, 16 chq 111-10-2 có vach thu6c loai kho sap d6. Vach true tie'p dia. via IA tap b6t ket phan b6 deu day tCr 3,8 + 8,5m thuOc loai 6n dinh trung binh den 6n dinh; vach co ban la 16p cat ket, bQt ket phan b6 deu day tir 6 -:- 20m arng viing kho sap (16.

+ Qua ket qua dinh gia b6 sung cac khu vt .rc chuyen din thu0c du. an Tau nr áp dung gia khung thay arc di dOng cho thay:

- Lo chq 111-24-1, 111-24-2 (canh DOng) via 24 CO dieu kien dia chat ky thuat mO arang tkr 16 chq 11-24-3 (canh Tay) nht.r mire d'6 bien Ong chieu day, g6c d6c 16n, vach via la lop set Ica, set than mem yeu a sap la gay tut noc 16, lam giarn dO 6n dinh cüa gia ch6ng va dac biet than trong via c6 tinh tkr chg.)/ gay khO khan cho cong tic khai thac NIA phong ch6ng chay. Do do, bao cao de xuat khong áp dung giá khung thily lire di Ong cho 16 chq 111-24-1, 111-24-2.

- LO chq 111-10-2 mix +30 + +90 thu0c via 10, khu Trang Khe III c6 da vach thu6c loai kh6 sap d6 nen bao cao dé xuat khong ap dung gia khung thily lire di Ong cho 16 chq nay.

De có k8 hoach khai thac áp dung gia khung thay lure di Ong trong th6i gian Vin KHCN MO de xuat tiep tuc tridn khai ap dung gia khung thay luc di Ong

GK/1600/1.6/2.4 vao khai thac cac via than c6 goc d6c den 45 ° va CO lieu kien ky thuat mO thuan lei theo hoach caa mo.

4.6. K et luizn, kien nghi. Qua qua trinh trien khai thuc hien dcr an cho thay, cong nghe khai thac ap dung

tai 16 chq 11-24-3 theo thiet Id lap la hohn town phi hop. Dieu nay &Ric khunginh trong giai doan 16 chq khai thac 6n dinh (tir 10/2011 den 1/2012), sari luong khai thac 16 chq dat toi hart 14.117 T/thang, trung binh 12.688 T/thang, nani suet lao Ong dat

4,1 lan/cOn,12.-ca. NliIn diting, so v6i c is 16 cho chOng cOt thy lire don. c.hong gO trong ding di6ii kien thi cac chi tieu kinh te:k9 thuat dat CILNYC cua 16 chcl ch6ng b ing gia khung thUy lifc di Ong la =rig d6i tot. Do do, co th6 dinh cOng nghe khai tilde sir dung gia khung they tut di Ong GK/1600/1.6/2.4/HTD la ap dung duvc cho viec khai thac cac via c6 goc d6c da vach va da try via thuQc loai on dinh trung binh dell on dinh. Tuy ithien, trong qua trInh khai thac da xay ra skr c6 din den 16 chq phai dirng khai thac som lion so v6i k6 hoach. Nguyen nhan do than trong via c6 tinh tu' chay, trong qua trinh khai thEic phai ap dung cac giai phap Ung xtr nhu than c6 tinh tkr chay dale den lam chain ti6n (IQ khai thac, lam tang rink do rfing noc, to guung 16 chq. Ngoai ra, thkrc t6 di6u kien dia chat via than thay d6i phdc tap, chi6u day via co xu InrOng mong dale, trong via xuat hien 16p kep la lop bQt k6t cling c6 chi6u day trung binh la 0,6 m, phia tren via than la 16p set k6t day trung binh 4m m6m y6u de sap d6 gay hien arcing rOng noc trong qua trinh khai thac. Phia ten 16p set la 16p bQt va san 1dt cling co chieu day 4 ÷ 15m sap do sau lop set k6t tao xung ltrc tac dQng cuc bQ len cac gia khung gay hien arcing x6 dat gia ch6ng.

Theo k6t qua cap nhat hien trong dao 16 va khai thac, cac khu vkrc chuydn dien trong dkr an co dieu kien dia chat Icy thuat khong dam bao ap dung gia khung thily hrc di d0ng GK/1600/1.6/2.4/HTD. Do do, de ti6p tuc ap dung trong th6i gian t6i, gia khung thily lu'c di d0ng sau khi dirge thu hoi tai 16 cho' 11-24-3 can xem xet dtxa vao lap dat khai thac tai cac khu virc co di6u kien k9 thuat m6 thuan 16i theo k6 hoach khai thac ciaa ang ty.

III. V kiin thim dinh va k6t Wan:

- Th6ng nhat vOi cac not dung trong bao cao danh gia kel qua ap dung thin nghiem cong nghe khai thac sir dung gia khung di dOng GK1600/1.6/2.4/HTD tai 16 ch6 via 24 unit +30-:-10 via - Cong ty TNHH MTV than Hong Thai do Vien khoa hoc cong nghe ma - Vinacomin 14p.

- Giao cho Cong ty than H6ng Thai cling k6t hop voi Vien KHCN m6 -Vinacomin xem xet, nghien cdu cOng nghe khai tilde de thay th6 cho cong nghe chfing go clang ap dung hien tai cUa via 24, via 18 khu Trang Khe.

- P.KTCN-MT bao cao va d6 nghi Tang giam d6c Cong ty xem xet d6ng bao cao danh gia k6t qua ap dung thix nghiem cong nghe khai thac sir dung gia khung di Ong GK1600/1.6/2.4/HTD tai lo chq via 24 mix +30-:-I0 via - Cong ty TNHH MTV than Hong Thai lam co' s6 dd tridn khai dux hien cac buot ti6p theo./.

PHO TONG GIAM HOC TP.KTCN-MT

Nguyin Ba Tru'o'ng Da Anh