· coudil iOlls il! t,llp hasili 'U1d it,.; PIII·irOIlS. For Illorf' tllall LO years ppriodirill le\,pl slIr\'('y Oll IIi!' hO!tOll1 ol" Opf'1I pih ;llld urift.s llave hPPII COlldllClpd

$Page 1: · coudil iOlls il! t,llp hasili 'U1d it,.; PIII·irOIlS. For Illorf' tllall LO years ppriodirill le\,pl slIr\'('y Oll IIi!' hO!tOll1 ol" Opf'1I pih ;llld urift.s llave hPPII COlldllClpd$
,,('TA \I00:T,\ '.\ IKS;\I .\S ('f{ (I I'I!I)

HYDROGEOLOGICAL AND GEOTECHNICAL CHANGES

IN SOKOLOV BASIN CAUSED BY COAL MI ING

JIŘINA THCh:O\· .... \.-SKOH 1::1'0\'.\ .

.JOSEF' HANZLÍI\ rllld LADISLAV !\j\'(;I�H

ln,tilut ... of StrllctlU· ... "11d H",-k IIl,.,ch"lli,-,. CZ"d, H"pllbli,- /\,·ad"'lll.v of Scit'["l!"("

V Hol"'ovi ... k/,,-h <II. 182UH [ -' r"gu ... 8. ('z"d, H" pu"Ijc

Phone:+42U2/3121748. F"x :+-1202/fi88004H. E-llI"il: I rckovr,((vi,." II .,·",.,'Z

AS::;TRAC'T. IVlillillg nf brnwn cOill iu Sokolov Ba�ill illtf'rf,"n":-, wi!" tllPrlllř1.1 gn.� rj,�ll

W'llt'l' wit.h tl,.., wat.e,. 1 ... \' ... 1 ,,,,,1 ... ,. II,,· pn>"'u· ... . Si"c ... Iwgi""i,,,; of II,i, (" 'lItury tl",

t-hel'rnal \Vater at MariI'> MiIH! ha� 1H-"�11 ptunpcc'd to '!lak,·· 1IIHII-'rgl'olutd IlJilljllg f(�a.:-.jblt'. ln th ... last dt'cad" IIH'rlllal wal,>,. 'll .Jiří coaJ 0IWll-pil l1lin ... wa, p'UII" ... d ' " pn,,,id ...

geolp(-hruc;,] saf ... ly. Thi, pap"''' i"dlld", dala I"""d "II (>\'"lu,,1 io" "I' I lO,.d ,,,I,· rOllt i,,1'

UleaSlU't>UIf-'nt� in area illf"If..l'lI'pd !)Y plIlnpiug. dl;Lllhr':-' ill walf�r dIPlni:..l!'y n",:!,flJ'dillt!.

10 d"wat.f>,.illg a!lel r"" IlII, of b"ol"d,"i,-;,] n" """Th.

J(EYWORD:-i: Open-pit cnal 111illillg. thpJ'l1lal jJIT:-':-'IU'/' watp-I' alld dpf()nllal iOIl Ch;HlgP:-',

1. INTRODUCTION

For sť'vť'rill yeill's CO<l1 ill I he celltral part or Sokolov Basill IIHS heE'1I IIlilWd 1IIIder

the 1)J'ť'ssul'ť'leve) oflllel'lll<ll gas ric" lVa(.eI'Orb<lSill aqllir<'l' (.Jelel, 1�7L; Frrl.lts. 1 �)K4;

Fig.l). Mining OCCIII'S iu pl'otecle<l zoUť'S of 1\<lrlO\'Y Vary Ilallll'i1l lwaliug t.hť'l'Illill

Spl'lllgs. Becallsť' dil'ert cOllnť'cl i011 het.weell 1.11ť'I'III<1.1 1V<lIel' ill SokolO\' Rasill allU Karlovy Vary spriugs has nevel' Iwell ť'XCllldť'd, th(,l'e is l'ei11 possihilily Illat. IlliJJing has a loug t.el'lII impact. Oll t.IJese' spl'iugs (HYllie, 1 DG:!: H)()/I). TIIC' s('l ol' ť'xpellsive

IJlouit.oriug devices allcl I IWaSlll'eS I,as beell rlliť'Ay fO('lls(-'<I at rl g<,ot('clluici11 sal'ety

ol' opeu-pil <:Oillulillillg Iwfol'ť' I "('1'11 lal pl'essltl'e \VaLel' �,rrp('ls ill IIlillillg al'e<l "lid

its lal'ge elJvirons.

By t.he ť'nel of thť' I <l.sl. Cť'IILury <l.lld <1.(. t.lw begillniug or (.llis C('III.III'Y ..

. Josef· coal

sť'alll W<lS Illined by <l.1l Ilndť'rgrollll<l Illillillg Ilwt!Jod. ZOlle:-; IVhel'<' .Josef coal S('i1111

IV<l.S sť'parat.ed only hy t.hill lay<'l's ol' ( 'Iay fl'Olll IllIdf'rlyillg walpr h('<lrillg Stal'<' S ,.,dlo

st·rata Mld crystalliue Iwdrock cOIJlaillillg pl'E'SSIII'f' waler. wel'e cOllsidprf'd IIIIS;\I',., for

IJlillillg. III sllch ZOlJť'S IIliuillg al tllal'ie MillP occllrr('(l. III drifls illl'lIslJ or thpl'Ill,,1

water lVilS observť'd. In Octobť'r UlOl dlll'iug excil\'itl i011 of I III' '1lIaill drift a.1 :'\0.11 silaft. ol' tlal'ie Mille all illt'llsll ol' tllť'l'lllill wat.ť'1' alld cOIIseqllPut.ly f!oodiug ol' dl'ift.s

occllI'recl (.Jol'dan et. a!., 1908; Klíl', I D82). FollolI'iug IIH' illl'llsh cllallge iu cHpacit.y ol' Karlovy Vary spriugs lVas ohserved. Aft.er 1�()8 IIIP ol'igilJal cilprtcity of springs

lVas I'ea.cheel.

lUU .J,TRČ'I«)d-S"OŘEI'()\',�, ,I,IIA�ZLí" ,,11<1 I. .. \�(:EH

s QDB , I l��'� < � ,,@]

IJII

PIC;, I, SclJelll"lic geologic Illap ol' SokolOl' H;ISill (adajlll'd aľlC')'

V,ILwlPlla I ml:!): I C'ypri� t'la,\':-.ltiJll':-.1 r:da. '2 :\llIcHlíll t't,;d �/';lIll i1JHI \'"kalli,'

dptrital :-.trata. :s �tan-; Sf-'dlo :-.trillil a,lId .I()�t·r ('I),tI !">("lIll. 4 -Dnllp()\':-.k� i\lt:-.. pYI'IH"la:-.tic· I"o(·k:-.. Mralli!(', fl CT,\':-.I;JJiIW

c()nlpl�x. I 111aill falllt:-. nf L>a:-.ill. R oP1'1I pit Illillf:-' (.Ii .Ii"í. Dl' - D(,lIž"a), �) I "'('I-'holl-",

Alll.Ollíll ('oal sealll is Illi]](>d h," all opel I-pil Illillill!!, 1111'IIIOd, I)\])'illg Illillillg

tIJp t,hel'lll:\1 gas )'ir!J IHPSSII)'I' lI'alp)' ,rilll ;-tll Ilpll';])'d li,vd)'osti\lic P)'I'SSII)'{' I'fl'c-c(s

I lIP ill'iwl'Illl'i\hlt' 1lllclP)'lyillg sl )'al,;] alld Plldall!!,!'),s t 1\1' sl,ahilily (jl' IlJI> coal 01ll'11-

pil, hot,l, olll, COlJsidc)'ilig IlJI' dip ol' IllC'se sl)'al;l 111('1'(' are' Ci)'CIIIIISI;IIICI'S 11'1\1'11 a hotl,olll of t.IH> 0IWII-pit Illitl(' gels dp<-'ply Iwlloll' liJ(' 11J('I'III;tI lVal(')' P)'PSSII)'{' Iwad,

01J(' of tlle kpy )'ellwdy 10 ill'iHOI'e Illillilig saľe!.,' is pllll'i>ill!!, liJ(' IIJ('l'Illal PI'(',.,slI)'e

1I';l(e)' 1')'0111 the IIlJde)'lyillg has;tI aqllif(')', Tlw ohj('cli"I' is 10 )'pdIlCI' Ilwl'Ill;tI wall')' 1)I'I'ssll)'e IlPad ;11$1 ;11 Ilw Silllll' lillw 10 lilllil df'ľ"l'Illalioll (JI' discll;H!!,<-,d \'()k"llic

Ll et,)' i tal st)'ata 'II liJ(' opell pil bollolll. TlJe plllllpill).!, illlpacl ol' I lwl'llJitl lI'all')' Oll IIH' geo-hydrologiral sysl.elll ol' 111(' hasill 's 1'11\'1)'011"; IS also Illollilol'('d lI'il llili

OIH'l'i\l iOlli\l IIIf'aSIII'l'S,

('0:\1 Illillillg H UOI 1 IP;lIlipc ! hy IlJI' 1I1'C('SSH)'," pllll'i>lllg (JI' IIIPI'lIJi" lI'all')' will 1)('

carried Ollt dllriug IIf'xt yf'ars, For I llis rf'a,,;oll I hl' risk ol' ('llilll!!,l' ol' tlJ('l'Illal \\'"If'1'

rf'glllle ol' hasill 's IllId('rI,villg sl,r;l(a will! possihilil�' ol' ils prop;l!!,alioll alld lillnl

illlJlarl Oll l';i$'lovy Var,v Ih<'l'II1,,1 spl'illgs 1)(')'sisls, I')'o.i('cl ol' ll .. , ('z('ch !ipPllhlic

lUl

Cl'illll Agf'lIcy crtllt'd "C'Ollst'qllt'llet's ol" eoal Illillillg Oll \\'atpl' hp'\I"illl-', systf'111 ol" SokolOl' BilSill in relrttioll 10 l\arlOl·.I· Vrtry IllPrlllal wal!'r prot!'ctioll" df'als willl tbis problelll. Project is fOCllsf'd Oll sylltllf'sis ol" elllTf>11I dilla I'f>grmlillg pro(" ('ssPS IU IllilJillg rtrert of Jiř'í OPPll-pil IllillP <lud Slll'rolllJ<lillg arpa.

'2. I:3,\SIN CIIAHACTEHISTICS

Bf'drocks ol" Sokolov bro\V1I eoal BilSilJ is l" orllJ('d ln' ).!;Plllil('" of I\arlo\"\' \'ill",'" plllloll aut! crystallilJf> sehists. Hasal Slarp St'dlo sl rala i" c1laraelniz('d hy irr<'gltlar del'plopIIH'1J1 ol" si1l1ds eOllglolll<'r;llps alld qllarzilt's illCllldillg Iwds of cla�·. TIIP

oldesl repl'psPlIta(iv(' ol" orgallog(,llie spdillJ<'lJlal i011 is .Josef co;t! spalll ",hiclJ i" I U III IlIirk. OI'Pl'lyillg strata of .lOSf'1" spalll 'HP fOrllJ('d hy \"()kallic d('1 ril al sl I'al iI fOrlll<'d by tllff"s, rl<ly and ela�'sloll(, illcllldillg (Iillilp Illalf'l'ial as illl accpssor.v. t\hO\'(' III(' 40 80111 tliick volcallie-del,rilal slral;l llw IlIrlill Alllollíll ('(l,t! ";('rllll lll) 10i)()lll llliek is loealrd. OVf>l'lyillg sl rilla of liJ(' , .;('alll ijJ'(> fOrllwd h\' el'I.\'"loll" lip t'JI :\i) III Illiek (Pill"2), SedilllPllJs ol" SokolO\' H'lSil1 ar<' dislllrlH'd hy "i).!;llifiealll I<'elollie hillll'<'s sl rikillg N E- S\\' aud hy a 1llIlldll'r ol" di'l!-',olJal i\lld ohliqlll' ťilltlls \\'lliell \\,pakl'll I lie slrrllgl,li of \'Okallie-delrilal slrilla (Fig.l),

500 (111) a.s,1. 4o�0:líllilill

500 1000 J 500 (m) 1 ° ""dayilll', {'la,I" 4 ('""I �f-'f.L1I1 . 141:-'1 ·1"

2 111)('1'11,,1 ""'''I' J Střlr� �f·cll() :-.lralll ř1l1d I",d,..wk:-. 3 (\);tI :-,erlTlI Jn:-.d' G \',dn'llli,' cI.'1 ri I "I ,I,.;ti il

PIC;, '2. Scll"llIalie spel i011 {Jf hasili,

VolnUlie-df>l,rital sl pila fOrllls ;1 eOldillillg 1;1.1'('1' of 1111' Il Iilwr;t!izpd IIH'r1I1,t! ga,.; riell wa,lpr \Vil,ll a IHt'SSIII'I' IpvI'I, i\lld '\1"(, P;Hliřt!I.,· li('d 10 .Jo";Pf S('illll, hlll prilJI'll'ily to I III' h<lsal aqlliff>r of SI aré Spdlo st I'al a aut! t 11(' IIPPI'I' Jl'1I'1 of I III' cr.vstalliIJl' ('()IIIplt'x. 'vV<tt,f'r t(,lIljwratlll'!' 1'<1llg<'s 1)('111'('1'11 L.) -IO"C. loLl! dissoh,,'d solids (TnS)

GOOO DOOO Illg,I-1. ('hplllil'all.l· 1\';111'1' hrlollgs 10 Illill('I',l! lI'al ('1' ol'' ' ('arlshad 1.I'jl!'' ' (Dvořrí.k . 1000). TiJeI'lIJ;l! jlI'PSSIII'" lI'ill('1' colil ;lillS Iljl 10 · 1.'jOU 1111-',,1-1 nI' [';Hhrlll dioxid!' alld 1 :l,'j Illg.I-1 ol" lIill'o!S('II. S'IIIII'i\1 iOIl jlI'PSSIII'(' l'illl!!,I'S !J"II\'('('II 0. 1- 0.1·-) �I Pa (.)('I!'I. HJ7L).

:3, C'IIANGES C'AlJSED !:lY ('0,\1, f\IININc; f\IO.'JITOIlL'JC; t\IETIIO[)S REVIE\\'

To f'IlSlll'r gf'OIf'r1lllicrtl saJc'ly. ol' Ojl!'11 pil IlliJJillg alld 10 pl'olf'el 1IIt'I'IJJřll lViller all f'XI,f'llsivf' I'XplOl'al,iolJ pI'O).!;I'i\111 is 1'111'1'('1111." III pl'ogJ'('SS. Mosl ol' activiti('s al'!'

102 .J.TRi"I\OI'Á-Sl\oi':EP()\·.� . .J.I-IAI'ZLíl\ ;,,,d L . . \;>;C;EH

focllseu ID prol'idf' a SlHhilily ol" Ilw opPII-pil hollolll ;lg;lillsl a !lolpllliHI hrpak IllI"ollgll causpu hy lift illg I"orcf'S ol" gHS riell \\'alf'r I"rolll Ilw hil!"'al aqllifpL Irlliclt coulcl result in cessat.ioll of IlIillillg allcl also 'III sigllificaltl dlilllf!,I'S ol" Ilydrologind coudil iOlls il! t,llp hasili 'U1d it,.; PIII·irOIlS .

For Illorf' tllall LO years ppriodirill le\,pl slIr\'('y Oll I Ii!' hO!tOll1 ol" Opf'1I pih ;llld sf'rvicp urift.s llave hPPII COlldllClpd. Tbis sll]'\'ey providl�s dala reg;lrdillg IIIHlprl. l·illg strata of t,lH' mined coa! Sf',ÚII dllrillg cOlltillllOIlS sl rippillg <tIld Illillillg of coa! Op!'lIpit faces ancl regarding defol'lllatiolls callsPC! hy gas riell I IIPl' lllal ll'alpr OI'f'rpITSSllre frolll the basal aljllifeL

III ilrea. of ('oal opf'll-pil IllilWS alld ils elJ\'irolls ohsl'I'I';11 iOIl horplJOIf's 1I'III'n' challges of t,hel'llla! \\'ater 1)I'('SSllrl' Iw,,,1 arp COllliIlIlOIlSI,\' Illollilon,d an' drill"d (PaZdf'ril, 1989-1995). Ilpad of lllis \\ 'al('\' IlPllo\\' lili' hollolll of op"II-pits is IO(';III�; redllced hy draillilge horellOles. Tplllpf'ratllrp rllallgps. g;lS rOlll!'111 ;llHI ('1J('lIlisl r�' of plllllped t.hel'lllal \Vater is IlIollilorpd Oll 11](' I(mg I('rlll h;lSis.

F'urt,herlllore a.t. opell-pils gpolprllllical SIII'I'I',\'S ;11'(' rOlldlJrlpd. BorellOlps rol' I'XlellSOllwt.ers ancl for precise illclillolllel ry slll'l'ey lI'prf' drilkd. To IIlakp disl rihlJl iOll of verlical IflOVelllelJls ill I'olrallic dptrilal sl.rala III0rp ;ICCllrall' slwcific hon'holl's lilwd hy IlIaglletic rillgs lVf'rp drillpd. To forpcnsl del"ol'lllal iOIl ol' I Itp opell-pil hol-10111 callspd hy 'III IlIlcolllrolll�d IIIPI'III;t! 11''111'1' o\,('rprpSSllrl' alld 10 asspss I lIP slahilily of collfilling layer, :\1) (tlte 1111'1'1' dilllpllsicJllal) pltysical lllodpl alld 1llillltf'lIlalind 1I10df'lIillg bas I)('ell IIsed for sl'I'l'ral ypars (Tr(�k()\ ':'-Skoi'('pOl ':', IIl!JK: DolpžaIOl';i, 1 D9L).

TIIP IIlosl nil,ical sil,lIal,ioll is al .JiH 0IWII pil IIlilll' II'IIPrp 'll liJ(' IJllc()\'('r"d hol 10111 ,tll lIl!colll,rollřlhl(� OVI'rprpSSllr(' ol' ('OllriIlPd lI'řlll'I' IVil hOlil řl 11,1 ' I c)(' a I rpdllcl iOIl ol" 1 his IVřller pressllre bead lVollld n'i\rh O'(i ;\l l'iI.

4. INTEHVENTION IN lINDER(;HOl'!'\ll W,\I'I-:I< HE(;I\II�

4.1 . Mari( lIlillc N(). \. :';haf! fJ1I1/Ijlillq

Ulili! Hl90 tllP regilll(> ol' ulldergl'oulld \\'iller 1)I'('SSllr!' ol' .Jos!'r ('(lili SP;1I11 has;tI i-lquil"pl ' lVilS sigllificillllly illrhl1'lI('('d hy jllllllpillg ol' I 1I1'I'I11al \\'all'l' frolll ,\10.\' sl Jil 1"1 ol" Marif' M illP \Vhicb řil Ilw I){'gillllillg ol' tbis celll liry h('(';IIII(' I lIP Sokolo\' 1'\;I"ill dl'aillilge celll,l'p (Fig, :\). III Orlohel' 1901 followillg :tll illrll",11 ol' I li1'rlllal \\'al('1' ill No.1 1 silan, ol' Marie Mille IVllell IIlilll' waler l'aisl'd lip t() lili' Ipvl'l ol' AlllclIIÍII (,Ocli SpeUII ;uld nooded Illilll' OIH'llillgs a dl'lI'ilterillg or:Jospl' ('0;11 "'('illlI slilrll'd. F'rolll sll;lft

No,\' a warlll lI'aler ol" "('i-lrlsb;ld" Iype ill 1'0111111(' ol' r).() :Hl.OI.s-1 lI'ilS pllllqlC'd.

TIJP walpr lel'pl ill No.V S I lit rl \\,;lS kepl al :)L�III iI,S.1. hy plllJlpillg. I llIp;lcl ol'

plllllpillg éllld projlagillioll ol' depressioll l\'ilS 11J011i101'1'd llll'Ollgll hore,llolps ill \o.\' sltaft Ileighbolll'hood. III hOl'eho!1's 1101 onl,\ ' Cl waler 1,,1'(,1 IIIOV1'IJII'ul hlll also ;1 gas

phase lI'as 11101litol'ed. \\'ith sllIall l'řlrialiollS iI (,(lIIdiliOIl 1'I'l'al1'd I"ollo\\'illg liJ(' 1I';lll'r illrush was kept for a 11I11I")('r ol' ,l'P;HS ",111'11 \0.\' sllarl 1I',lS Ilse'd rol' de\\'<lll'rillg

(F'ig.4). Long lel'lll IllOllitol'illg ol" pl'l'SSlIrp "eads I 1II'0llgh hOI'l'hol('s prol'pd 1'''1'1 "ill illdelwllc!ellce of tlJ(' :Josef ('oal sealll aqllifél' wlwre i1 depre'ssioll nl'aled by plllllpillg of a thel'lllal water řil No,V sbřll'l played il sip;lIiri(,řllIl, I'olp (Pazdpra, 1980).

N

I

60P"

HVDROGEOLO(;WAL A N D L:EOTEC'H ICAL C'HANC;E" IN SOKOLO\' B,\"'I\: '"

'l.�� KPI42

(I (J,'; ll/klll

--- "'111"/\ We/lf

IUJ

Fl c:, 3, Sit lIat.ioll of opell pi I lili IWS alld ohsen'a I i011 hor('l,oles i II Sokolm' hasi ll,

III rerellt years Iwfore t,lle old noodf'd 1V0rkillgs čll .Jos('f ročll SI'čllll \v('IT clospd ;1II

Ill]('oul,rolled seepillg of wakr nrolllld III<' sl,nfl casillg ()(,(,IIITe'd I)('C;III;;(' I ll<' orific(' gal'!!;(> isolčll.ioll \\'as Ipakillg, I'llIggillg 0PP!'čtl iOIl of I lIP "h;lf, pť'J'i pl Iť'ra I nlsillg I()ok

plarp IlPI\Veť-'1l HJ90-1991, At II,al tilllP II,P 11I11IIpillg p"riod al \u,\' "llafl 1'lId('d

nud dosillg hy floodillg startť'd,

Thollgll Ilw plJllljliug of tlJPl'llIal \Valer at No,\' shčtfl of 1\lariť' \Iiue lasf<>d for

85 years t.be preS1;ure head of IIJPl'llIal \Vn,ter ill hOITllol('" ol' SI aJ'(; Spdlo sl ral a alld

n,vstalliJJe bedrock iu tlH' widp PII\'irous of l!Jp sklfl \Vas pr;lrl irnll,\' 1I0t illflllPlI('('d,

4,2, .]dí O1'rl1 Pit I1lm( l'lf))lpinq

lu 19�9 a l'pducf.joll or t,llI'rlllal \\,n(.('r pressllre Iwad of hnsnl i-$llIirer ill ;11'(';1

of Jiří 0P('ll pit, IIlille startpd (Fi!!;, :$, Tlw redllrt iOIl of ťl\'('rprl'SSlIre hy plllllpiu)!,

I IIPl'lllnl \Vater i" lIeressčuy to plilllillatp I lIP Jlossihility of \\'atl'r sp<'pagp ill IIl1dprl,\'illg

sl !'čll a of tlw Alllollíll ('oal spalll sl)('rilicall,\' ill \'irillity uf II'cl(lIIir [';jillll'es čllld ;IIso

to pre\'('lIt illacllllissihlp del'orlll;11 iOIl of t liP (1)('11 pil hol t011l ill locatious \\'Iwr,' a sigllifinllJl o\'f'rpressurp ol' II,erlll:11 \\,:11('1' \\';\S sigllifir;11I1 (Skoj'ppo\'čÍ" I DK�), "lId('r

If'asl favourablf' coudit-ioll n hrf'akolll of opell-pil hollolll čLlld ils f100dillg rOllld takp place,

Pnrnllel 1.0 local de\Vntprillg progralll ill ,1,(, 0P('U pit II lilie' ar<,a alld its eU\'irolls

a S,\'SIPIII of ohservntioll horellOlC's \\'i-IS drillC'd to IlIollilor cllallges of prpSSIII'P \\'čtlpr

level, Iplllpenll,lIre, ('0:1 cOllteld ;llId IIIPI'IIIi-II wat('r clll'lIli,.,tn' (1';lzdera, I!)xq

1 U4 J . TRéKO\'Á-SI\OŘEPO\',\ . .I.I-l.�NZLíK ,,1,,1 L .. \N(;ER

In5

InG

ln7

.1<11

N

1 1(10(1

./

• '\./"

_----Í-_

/

.... __ .1 __ _ )/ -

.:!O{)O{IIl)

FIG.4. Df'pressioll devploplllf'lIt III No.V sliaft ofi\lari" !\Iil le f'IlVlrOIlS III ypars 19Wi 19Ki

HVDROC;EOLOCI<'AL AND (�E()TECHNI,,\L ('HANC;E� li' �()"()L()V H'\�Ii' ...

1994

1995

19%

N

1

@ Silan \'

KP." o

IOOU

PIC;. 'jo Dpprpssioll clt-'v('loplllC'III ill .Iii·í 0P"II' pil 111111<' ('IIVI-

rous III yt-'i-HS I �J!)4 I DDO

I (J.;

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FI('. I. SrbPIII<tlir gpologir IIl'lp or Sokolm' I-L,sill (;,dapll'd "rll'r

V.ll'lvlplJa l�)H:I): I - ('ypJ'i� day:--llllli':--1 J';:da, 1. - j\r\lllllíu ('(lilI �1';llll aut! \'llkaJlil'

dt->tJ'ital :--.trata.:� �tan� Sedlo �t l'a ' a allr! .I()�t-'r ,�I);d :--I'alll. .:.l -Dnllpov�k? IVltt.. pyr()da�tic I'(),�k�. Fl �I';-Lllit(·, !) ''I'y:--talliI1l'

c0l11plpx. 7 - lllaiJI ľalllt� nf h;:l�ill. R 0pI'"-pit Illillf':--' (.Ii-.Jiří.

Dr- Drnžl",). H � I",r,··liol,�,.

AlJt,o]jÍII roa.1 spalll io-; IlIilJed Ilv :111 opell-pit Illillill!!, 1I11'lllod. J)lIrilJg IllillilJg

tlw t.henwd gas rirb prpsslln° \Valer with ,lil IIplV;lrd lJ.vdroo-;t'llic pn'ssll],(' dl'l'cI s

tbe illlperllleahle IIl1derlyillg slr"I ,;.) nlld <'II <I ,I lI!!,prs lili-' sl,allility or I ll(' roal Opl'lI

pil, hot-t , olll . COlJsiderillg t, 11e dip or t,"esp sl r;,la 1,11<'n' arp circlllllst;IIIC('S ",111'11 a bOt,t,OIlI of t, be opelJ-pit IIlilJP gel,s dpl'ply IlI'lIo\\' I liP tlll-'rlll;\1 \V;ller pressllj'(' IWclcl, Glle ol' 111P key relllpdy t,o illlprOl'e I II iu i liJ.!, sarely is plllllpill).'; tlil' 11il'1'llIal prc-'sslIre

W'ltpr l' rolll t.ll<' lIuderlyiug has,tI ;\(I"ifer. TIII-' ohj('cliv(' is 10 rpclllce I I II-'l'l 11;1 I \ \' ,ll er

pressurp III-'ad aut! ,tl t,1lf' sa.llle I illll-' 1,0 lilllil d('rorlllil l iOll Ilr discluHget! \'olr'l llirdet, rit, al sl,ra.tn al, I,IIP Olwu-pil bol,I·,olll. TIJe JlILlllpil1!!, illlpacl or 1111-'1'111;\1 \\';\I el' on t,be geo-I,ydrological SYSt,('111 of' I liP hasill's IOIl\'irolls IS nlso Illollilored \\·illlill

opera tiollal II lf'a.SIl ['es. Coa.1 Illiuiug accolllpallied by 111(' lIl'C(-'Ssar,v JlllIllJlillg ol' 11Jl'I'IIIC1I \\'nll'l' \\·ill 1)(>

carriecl Ollt dnrillg lIext yPiUS. Fol' Iltis I'(O,ISOII litI' risk of' cllil lli!,(' ol' 111(,(,11,,11 \\'ClI COl' regll11ť' ať hrlSiu's 1l11clerlyillg str"ta witl! Jlossihilil,y ol' ils prop"!!"llioll Cl lld lillal

illlpa.ct Oll Karlovy Vnry 1,llel'lllClI sJlrillgs pl'rsists, l'l'o.il'cl of I III' ('Zl'clt Rppllhlic

lUl

C�l'allt Agellcy nt/led "C'ollseqllellcp:-< of coal IlIillillg Oll walpl' IH'ill'illg :-<yslelll 0(" Sokolov Basill ill l'elMiol1 1.0 l"':arlO \·.v Vary tlH'l'lIlal \\';1IPI' pl'olpCI iOIl " dPnls wil II this Jll'oblelll. Pl'o.iect is foclls('d Oll sYllllwsis 0(" cIII"l'plII d;\1 a I'egal'dillg I1I'0C('S:-<('S III IIlillil1g i'll'ea of Jiří oJlPII-pil IlIill(' aud SlllTOlllldillg ;HPa.

2. BASIN CHAHr\CTEHISTICS

Bedl'ocks 0(" Sokolov bl'OIVII coal Basil1 is ("ol'lIlpd h.\· gP\lIiIP" 0(" I"': a rl 0\\' ,'ill'y plllloll ?\IId nystallillP scliisls. Hasili SI ill'P S(,dlo s t 1';\1 a i" cll;uacfl'l'iz('d hy il'r<'glllal' dp \'plop"I('11f or sallds ("(lIIglolll('l'alps alld qll;uzitt's illcllldillg Iwds 0(" cla.\". TIIP oldt'st I'Ppl'PsPlltativl' 0(" ol'gallogC'lIic sedilllC'111 al iClII is .Josp(" cOill ;,P;\1I1 ,,·IJiell i;.; I () III tlliek. O"pl'lyill)!,stl'ata of Jose(" spalll art' rOI'IIiť'd h.\· vo!rallic dpll'ilal s tl'illa fClI"llI('d by tllffs. clay and cla.\'sI OlIC illCllldillg IlIflilp IIlal('l'ial ;\,.; 'III accpssol'.\". AhO\'(' Ilw 40 80111 tlliek volcanic-del. l'it;tI sll'ala I lle IlIaill Allfollíll coill ;';(''1111 lip loi)O lll lllick is loealpd. OVPI'Iyil1g ,.;t.l'al a of II", ";PillIl ;-\I"P ("ol'lI1f'd h\' clil.,·sloll(' lip 10 I :V) III Illick (F'ig. :2). SedilllplIls or Sokolm' 1l;lsill al'p di";!.lIl'h,'d h.,· ,.;igllifin\1I1 I('clollic r;\illli"('s sll'ikillg NE-S\\' alld hy a 111111")('1' or diagoll;tI ill,,1 ohli(!'/(' rillllls wllicll I\'p;)kPII ll", sll'ellgl.h of l"O!rallic-dpl I'il cd sll';tI ;\ (fig. 1).

500 (m) a.s.l.

40(�) lilIi.;;; 500 1000 1500 (m)

1 On·r1"yiJl.t; .-1"-'" 4 ('(lid :-,1';1111 ,10:-'1-1' 2 [JlI"mal d",,'I ' [, �tar?- �f·cllfI :-.t rali1 alld I H'drfwk:-. 3 Co:-d :-.i';.lIlI ,Io:-'I-'f G VC)kilJlic' <It-'Irilal :-.1n-LliI

P I (;. 2. Sclll'lI1<ll.ie spcl iOIl (Jf hasili.

Volntllic-clpl.l'itrtl sl Pita rOl'lIlS ,\ r(lIIfillillg 1;1.\'('1' 0(" I II(' Illill('l",dizpd I bpl'lIl;11 g;IS l'icIJ walpl' wi!.11 a pl't'SSlIl'p Ip\·('1. ;lIld ill'e' pill'l iall.,· I ied 1 0 .Jo";e'(" S(';III1. IJIII pl'illl;Hily to 1. 1", hasal aqllifel' (Jf SI al'P Spdlo sl pila all(l t lIP "PP"I" pal"l or I II" CI".\·slnllill(' COIIIrlex. \lVal!'1" tplllpt'l"atllrP 1"i11l1!;I'S I)(,!II'('PII LG ·I()OC, lolili dissol \""d solids (TDS) (lOOO DOOO IlIg.l-I C'1H'lIlira ".,. \\'<I! ('I" 1H'lolIg,.; 10 III illPl"a I I\';]! el" or" Ca rlslmd I \'pp"

(Dvoř·Rk. I D90). Tberlllal pI"PSSlln' walPI" CO II I i1.ills IIp lo ·1·"j()O IIlg.I-1 or ral"holl dioxidp alld ]:IG IlIg.I-1 of lIilrogPII. Sa!lIl"alioll IlI" eSSIII"(, nlll)2,('S IlPII\'('('1I O.l- O.!:) .\IP;) (.]e!el . l!ln).

:L C'IIANGES CAUSE!) !:lY ('0,\1. i\I I N I N(; i\IO,'iITO I U;--.J(; i\1�T I I OIlS RE\'II�\\'

To plISIII"P geot'pcllilical saJ(·'ly. of OpI'li ril IIlillillg alld !o prolprl 111<'1"111<11 lVa.!pl" ctil pxf,PlIsiv(' pxplol"rtt. ioll progl";] II I is CIII"I"<'III I.\· III pl"ogl""SS. Mosl or artiviti('s ill"e

1 02 . I . T R<'·I\O\'Á-S IW ř� EP( )\·.� . .I . HANZLí" <tild L . . \ " (; E k

foc l I ,.;ed t o p rO\' i df' i I ,.;t n h i l i t y of t l w O I H ' I I - p i t h ot t o l l l r\!!,il i l l s t ; 1 p o t f' l I t i é\ 1 I , r('é\ k t l l ro l l g l t causf'd by l i ft i l l g fOI"Cf'S ol" )!;é\S r i d l \\'a l f'r frOl l 1 t l w has r t l rl q l l i l"f' r . 11' l l i c l l cou l d res ul t. i n cessil t i o l l of I l l i l l i l l g <l l l d a lso a l l s ig l l i f"i n l l J l r l l a l l ges o f I ly d ro l og i c a l cou d i l i O l l S i u L l w b as i l l r U l d i l.s f' 1 1 1· i m I I S .

For I I IOrf' t b a l l 2 0 yf'ill"S I l f' r i o d i c a l 1 f'\"I,1 S l l rn'\' O l l t l l P 1 )O I t O l l l oľ OPf' l l-pi l '" ; l l l d sf' r v i c e d r ifts I t rl.Vf' 1 ) (,f'1 1 cOl l d I l C I f'd . T l t is S I I j" \'f'y p rovi des d rl t a J"(')!; i l rd ill)!; 1 1 I 1 I 1 f' r l \' i l l g s l rata of I, l t l:' miued coal Sl:'a'l l l d l l 1" i l l g ("(l i l i i l l l l O I lS s l r i p p i l l g a l l d I I l i l l i l l g of cmd (1 ) (' 1 1 -p i t faces a n d regarcl i llg defol" l l l M io l ls c a l l sf'd hy g a s r i r l J I I W l" l I I a l lI'il t l' r ( )\'f'r p l"(,SS I I I"f'

rrO l 1 l t he b as a l aqlJ i ff'r .

l i l arf'a o f cOill O p f' l l p i l I l l i l l l'S a l l d i l s f'1 I 1· i ro l ls ohs( , I" \' ; l I i o l l h o r(' I JO I f's 11' 1 11 ' 1"1' ch il l lgl:'s or t. 1 t f' l" I l l a l lI'a l l:' r p rf'SS l l rp I tl:'ad a rp C O l l t i l l l l o l l s h' I I IO l l i t o l"l'd a rf' d r i l l l'd ( Pazdf'ra . 1 989 - l 9D5 ) . l I f' ild or l h i s \\' il t pr I l I' I I OI\" t l l l ' ho l l o l l l o f O I ) (' 1 1 p i t s i s l o r ; t l l y red l l cf'd by d r il i l l age h o rf' l t o l l:'s. T(' I I I j ) f'ril t I l rf' c l ]; '\ l l gl's. gas rOl l l p l l 1 a l l d d l P l l l i s t ry

ol' p U l l l p cd t h e r l l m l wil k r is I l lo l l i l o red O l l I l w I O l l g 1 1' 1' 1 1 1 has is .

Fur l h e n l l o re M, o p e l l p i l s gpo l ( 'ch l l i c a l S I I I"I·I'.I·S a r( ' rO l l d l l r t l'd . Bor( 'ho les 1"01" I'Xl e l lSOI J leters a l l cl for p rpc isl:' i l l r l i l l o l l lf'1 ry S I I I"I'Py 11'I'rf' d r i l l l'd . To 1 1 1 é\ kf' d ist r i h l l l i O I l or ver t i c a l l llove l l wl l l s i l l v o l c a l l i r dl,t r i l a l s t ra l a I l l o re a cr l l r; \ l p S I )f'c i f i c h O I"l' l l o l ps l i l l f'd hy l l l ag l l Pt i c r i l l gs lVf'rf' d r i l led . To fo rf'rasl d " fo r l l l a l i 0 1 1 o f I I I P o p e l l - p i l hol -1 0 1 1 1 c a l l sf'd by a u 1 I I I rou l rol l ed 1 1 1 I ' l" I l utl \\'rl l (' r ( ) \'prp l"l'SS I I I"(, ; l I l d 1 0 r ISSf'SS t l w sl a l , i l i l )" of cO l l fi u i l l g I ilyl:' !" . :I D ( l ili' I l l rf' l ' d i l l lP l I s i o l l a l ) p l lys i r ; t ! I l l o d f' 1 ; l I l d 1 1 1 <l I I W l l l r l l i r a l I l lode l l i l l g I l as h f'f'1 l I l sed fo r sl'I' ( ' ril l yf'ilrs ( TrčkOl·rí-Skoř·" p ( )\ · ií . I I H) K : D o l ('ž ; t ! O\·;í . H)92 ) .

T I I f' I l losl cr i l . i ca l s i t . l l a l , i o l J i s rl l ol i ř" í 0 IW l l p i t I l l i l l l ' 11' 1 1< ' 1''' ; 1 1 I l JI' 1 1 1 j ( ' ( )\ ' I ' I'pd bol 1'.0 1 1 1 al l I l l l co l l t. ro l l a h l p OVf'I" J ) J"( 'SS I I J " (' of CO l l fi l led wrl l · l 'r w i l I l o l l t a l l " l o c a l rf'd l l c l i 0 1 1 of I , l t i s \Vater p rpSS I I J" (' l w a d lVo u l d rl'ach OJi i\ 1 Pa.

LI . l . Jlfarir lIJ i11 f No. \ . :..,'1> 0/1 PU lllpillq

U l l t i l 1 990 t lw regi l l l l' of I I l 1 df'rgro l l u d w a t f'r p l"l'SS I I I" I ' oľ .l osl'! ' c ( }a l S(';l l l l l ' r IS : 1 1

a ql l i fpr \\'i\S sigu i fi c a l l t l .,· i l l n l l e l l cl 'd h.\." p l l l l l p i ug of 1 I I I ' I " I I I a l \\' a l l ' r fro l l l j\ o . \ ' s h a n of I'vl a r i p M i l l e w h i c l i a l t l w l H'gi l l l l i up; oľ t l l is c e l l l my hl 'C ; I I I J ( ' l i l i ' Soko l o l' ! 1 ; l s i l l d r a i l l agp ceut.re ( F i g . :\) . I I I O r l ol ) (' r 1 90 1 f "o l lolV i l l g a l l i 1 1 1" 1 I S 1 1 of I l wl" l l l a l 1I' ; I I f' r i l l N o . 1 1 s l l a fl . of" M ar i f' M i l W IV I I {' I I I l l i l l l ' w a l er ra isl'c I l i p 1 0 1 1 1 1 ' I p \"(' 1 o f A l l l o l l í l l coa l

S('; l l l l r t l l d �l()() d f'd I I I i lW OI H' u i l l )!;s a c l l'lI'a t e r i l lg oľ .J osl'f· co; l i S" r \ l l l s l r \ l" l ed . Fro l l l s l l r l fl :'11 0 . \ ' a wa n l l lVa t f'r o f" " C ' a r l s h r l c l " I �'pf' i l l \"C 1 1 1 1 1 1 I I ' of �) . O :Hl . O I .s- I lI'as J > 1 1 1 1 1 I ' ť'd . T l w \\,a,I f'r le" p l i u N o . V sh aJI \\' ; )S kppl a l : l2K I I I a .s . l . hy p l l l l l p i l l g . 1 I I l j l a c I of

p l J l l l p i I l g a u d p ro p agat. i o l l o f" c l l' I H('ss i O I I \\'as 1 1 10 1 1 i I orpd I h rOI l !!, 1 1 h o re l l o l es i I I \' l l . V

shil f"t nf'igh b o u rhood . I I I h o rf' l i o l l's 1 10 1 ot l l .,' a lI'a l n j p " I ' 1 1 1 1 ( }\i(' I I I I ' l l t h l l t a l so ;) gas

p h a s,' IVas I l lo l l i t orpd . \oV i l h s l l l :l l l " rl l" ia l i O l l s a cO l l d i l i O I l C I"I' : l I ( 'd [ " I " Io\\' i l l )!; l i J < ' w a l l'r

i l l ru s I J lVas kt'p t fo r a I I I I I I J l ) (' r o f" ." (':1 1'''; \\' 1 1 1' 1 1 .\ 0 . \ ' s h a fl lI'as I I sl'd fo r dl'wa t l' r i l l g ( F ig . 4 ) . L o ng l en l l I l lo l l i t o r i l l g of I ) f"ess u r p I wads I l l ro l l g l l h o re h o ll's p rowd cpr l a i l l i l l c l f' IW l l d euce o f" t l ip J osef" ("o a l sea l l l aql l i f"t>r w lwre a dl'p rc'ss i o l l cr l 'a l f'd by p l l l l l J l i l l g of a t l wr t l l a l I'vat.er ilt. N o . V s l l a fl p l ayed řl s i g l l i ri c a l l l r o l l' ( I 'azd( ' ra , I mlO ) .

H V D ROGEOLOGI<'AL AND G EO T EC ' I ! N I C A L C' H A N n E" IN SO{O;OLOI' B A " I !':

ll. � 1 0 klll

- - - Fuulls II'cl/s

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Fl G , :L Si t u at. i o l J o f op el l-p i I I I I i I I es <t i l d o hsen'al iO I l h o r( ' l lO les i I I SokolO\' h a" i I I .

I I I rcc(, l l t, years I )('for(' t, h f' o l d noodf'd wo r k i l l gs a t .J osef coc d sc'a l / I WC'J'(' dosed a . l l

1 I 1 1 (,o l l l ro l l ed seep i l lg o f w a l ( ' J' i l I'O / l l l d t l l ( ' s h a ft ca" i l l g O (, C I I I'1 'C'd 1 ) ( ' c ' ; l l l s(' I bc' o r i f i cC'

g r i l l)!}' i so l a t io l l \Vas Ic'ak i l lg , I ' l l Igg i l lg oper r t ! i0 1 1 ol' I Iw ,, 1 1 < 1 1'1 per i p l w r a l ( ' as i l l g l ook

p l <l ce 1 )(- ' 1 wee lJ 1 990 - 1 99 1 , A t 1 1 1 ; 1 1 I i l l /P I l l e p l l l l l p i l lg l H ' r i o d < I I \ 0 . \ ' s l l afl c ' l l ded

< I I I c l c 10s i l l g h y fl oo d i l l g s l a r l e d ,

T l l O l I g l l l iJe p l l l l l p i l l g o l' I l iP l' l l l a l w<l l er a t N o . \ ' s h al'l o l ' I\ l ar i e i\ l i u e l ast c 'd fo r

85 yE'ars t, b E' p ress u re head of l ! J p l' l l l a l w<l l e r i l l h o re l l o l es oť S l a J'(; S('c l lo s t ra l a a l l d

(' 1 '� 'sl a\ l i l l e bed ro c k i ll t.be \V i de C" I I \' i m l l s o f I I l e s h a fl W;lS p r; l c l i nl l 1 ,\' l I o t i l l f1 l 1 e l l ( ' ( 'd ,

4 , :2, Jiří Op ( 1I Pit Ali1l ( ! I II II I /' lnq

l u 1 9 8 D a red l l r t . i o l l o l' 1, 1 1 < ' l' I l l a l water p reSS l l l'e I wa d o l' hasa l ; 1 < J ! l i fc'r i l l rl J'("a o l' J i ř í 0 I W I I p i l. 1 1 I i l l (, s l a r l e d ( P i g , :l ) , T I 1<' red l l ( ' l i o l l o l' O\ ' ( ' J 'p r�'ss l J J'(' h,\' p l l l l l p i l lg

1 l lf'I' I 1 1 a l ll'a l er is I I f'ressary 1 0 el i l l l i l l < l l (' t h e' p os"i h i l i l " of ll' a t C ' r se(' p agc ' i l l l l l l d e rl ,l ' i l lg

s l ra l il o f 1 1 1 (' A l l t O l l í l l c ( J a l sea l l l sp( ' (' i fi (, il l I �' i l l I' i c i l l i l y o f I ( ' ( ' I c l I I i ( ' f; l i l l l res ; l l 1 d ; " so

1 0 P ]' ('I'f' 1 1 f i l l a d l l l iss i h lC' d(' fo r l l l a l i O I l o l' I I l e OpC'U p i l ho l l o l l l i l l 1 0 (' < 1 1 i O l l � 1I' I I p rp iI

s ig l l i fi c H l l t o\'C'rp r('ssu r(' or I h e l' l I I ; t ! \\' a l er lI'as s igl l i fi c <l 1 1 1 ( S kořepm' (l . 1 (88 ) . ľ l l d p r

I('asl ravou r a b l E' COl l d i t i oll a h reakol l t of 0PC' I I p i l h o t l ol l l n l l d i l s f100d i l l g c O l d d

t ake p l ate ,

Pa r a l l e l t,o l oral d e w a t,e r i l l g p rogra l l l i l l 1 1 H' o p e l I p i t I l l i l l P ;Hl'rl a l l d i ls em' i ro l l s

a sysl .e l l l o f ohservat i o l J h o re l l O l ps w a s d r i l l l'd t o I l lo l l i l o r c l l a l l ges of p reSS l l l'e II' < t ! p r

l e l'p l , I C' l l l p er a t u re , CO:! ( 'ol l l e l l l < l l I d I l iP I' I I I ; " lI' a l c ' r C I I l ' l l l is l l' ,I ' ( 1 ' ; l zd p ra , 1 !)ii � )

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\V l w l l I he rpu l l c l i o l l o l' I hp lI' i l l pr p rpSS l l rp Iwa d h p!!, l l l J . l ! J e VOI I I I I IP ol' I lw 1r ; l l pr

p l l l l l p ed lVas a ro ll u d Hi . O l .s- 1 C ' I I ITpl l t ly i l l regards 1 0 I l l i l l i l l !!, co u d i t i o l l s ( I l i p

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I I I l DH 7 l i j (' p l l ys i (' a l 1 I I 0 l k l 1 0 fOl'pc<1s1 i I d d'o rl l l ; l l i O I l d ( '\'" l o I l I I I I ' 1 1 1 1'01 ' p(' l' i o d hpI lI'fP I I HJDlJ - I ODfi IV<1S I I SPc! ( S ko i'<'po\' iÍ , I � ) K K ) , D l I l' i l l )!, I l tos( ' \ 'pars I I J P h o l l ol l l o l' I ht' o p el l-p i t I I l i l l e IV<1S g l'a d l l a l l ,l' h ro l l g l l l i u l o I I I 0sI d a l l gPl'o l l s p l acps , I I I 1 1 1 ( JSf p l aces t l t e I l I J Co l l t, l'ol !ec ! w a l f r p l'eSS l I re o l' t I l P r l l l <1 1 \\' a l p l' I'p ; lc l lP d l i p to O , (j \ 1 1 ' <1 , T l l f I l I i l l i " g fie l el lI'as C l i l by I I I ; l, i o r gpo l o)!, i c a l fa l " l s II' l t i c h a d I ' C 'rspl .1' a H'pr l pd , 1 1 ť ' I I l 1 d l' l' l y i l l g s l I'a l a s t a h i l i l y , H ('S I " l s o l' I I I < ' I l lO d ( ' 1 ,'x P(, l' i l l l ( ' 1 1 1 sholl'pd I l l a l i l l I l l is I'eg i o l l l i l i' s a rpl y I l I i l l i l l g dpP f l l d s O l l I'ed l l c l i 0 1 1 o l' I\' a l p l' I ) I'I'SS I I I' I ' I I < '<ld hy p l l l l l p i l l )!" Fo r I l lP yei l r o l' l DDO fo l lo w i l l g P I' ( Jc ( 'ss i l l g ( J f' d ( ' f'o 1' / 1 u l l i O I l \',l i l l l 'S I l l f 'a s l I l'f,d O l l I l i t' I l I o d e l i l IVas I 'P('O I I I I I IP l l l lpd 1 .0 h l' i l l g d01V 1 1 I I I I' \\' a l p l' P I'f 'SS I / I' ( ' I I f ' ; l d 1 0 : \GO I I I a , s , l ,

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reg a r d i l J g p l a u i l Jg p rored l l res of t l w o p e l l p i t I l l i l le l i l i I I I < ' ( ' l i d of I D ! )2 del ( ' l' I l l i I Wd

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w i l l I l Ot. exceed v a l u es e l l d a l l gC'r i l l g o p e l l p i t holl o l l l p ro \' i d i l l g I h ;l l I lw I l l i l l i l l l l l l l l \V i d l I I ol' t l te o p p l l - p i l bot 1 01 1 1 a u d 1 1 1 ;IXi l l l l l l l l d i p ol' i I J l ( ' I' I J ; t ! d l l 1 1 1 1 > w i l l 1 ) (, sl r i c l l y

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o l' ca l c u l at ions fro l l l p rel' i o l ls I I lodds ( l}olež<l I Ol ' ;í ('I ' l l . . 1 !) �J l h ) . As ;) r('ré'r<' l I ce

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t o b e rel <lt .ed (.0 t b e cha. r a.c le r of l lw A l l l o l I Í I I corI. ! sr'a l l l l 'o!ca l I i c dr-' l r i l a l l l l l < ! P I' i \' i l l g st. r<ll·.a d i s p l <lce l l I Pu l <l 1 ] ( 1 t lI P d i s l I l r ha l I ce o l' i l s i l l J ! H " J' I l wa h i l i l y ( ' ř I I ISed h y 1 1 1 J !O il d i l I g fol low i ug st r ip p i ng a u d I I l i u i lJg ol' 1 1 1 é' c();l l SP; l I l 1 a l H I ;J! so h y O\'PI' p re:-;:-; l l re o l' I 1 1 <' 1 ' 1 1 l a l

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1 . 5 I I I a bove I b r' s("rv i ee d r i ft foot i l lg a I lP l I C 1 1 I l l M k i l l c l l l d r'd i l l I l lr' "; 1Ir 1·e.' p o i l l l sysl e l J I of level l i l lg lV<ls fixed ( So ko lovsko . . . 1 9% ; 1 99<-: ) .

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I l I e l l l s i l J v <lr ious p a r l s of vo ! r - ; IlÚC dpl r i t ;I i sl ra l il C < l U l l< ' I l l o u i l orpd . I I e O I l Ce l' l l S

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al h o l p 1\ 1 .1 :1 2 1 r i l L gs ( d i sl a l l c( ' hel \\'!'(' L I l i li ' I " a l l d I I I \ ' 2 1 , 1 , r i l l ).!, \\' i I S :HJ . :tl ' l l I l )

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of l ec( ( l I I i c fa l l l t s IV l lerp 1 I 10vel l l ( ' l t l ,.; a l o l l g t l ! pse r'l I l l l '" I I l i g l l l oc c l l r . T I IP I I w l I l i O l lP d

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t er s p r i l lgs becal lse I HesP l l 1 1 I I 0 l l i l o r i l lg is foc u st'd I I la i l l l .v 1 0 p ro l l' c l s a fe l y or t l l !'

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b,u r i p r i l l O l l ře R i ve r ,·a l lpy řl l l ohsel"va l i O I l hO I"I, l l o l " O l l I l i l ' r i g l t l I l a l l d ha l l k o l" I l l is

r i \'Pr is reCJ l l i red .

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rpsl t l l i l l e l l d a l lgPl" i l l j!, I\: a r lovy \'a!".,· I I l f r l l l a l S J l rl l l gs .

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support ať C : ra l J l N o . '2fFí/f J7/0i/t{ " C 'o l lse q l ) (, l Jc ('S o f' coa l I l l i l l i l l).', O l l \\' ;1 1 ('1' h ('a l· i l l ).',

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