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Thfing tin khoa ht?c cong nghg mi5 w DANH GIA HIEN TRANG, NGHIEN CUfU Dl XUAT CONG NGHE KHAI T|IAC HtJP LY VA QUY HOACH AP DUNG CHO CAC KHU VUC VIA THAN THOdC COMQ TY TNHH MTV THAN MflO KHE Mao Khe is[.]
Thfing tin khoa ht?c cong nghg mi5 w DANH GIA HIEN TRANG, NGHIEN CUfU Dl XUAT CONG NGHE KHAI T|IAC HtJP LY VA QUY H O A C H AP DUNG CHO CAC K H U VUC VIA THAN THOdC COMQ TY TNHH MTV THAN MflO KHE Mao Khe is one of the big underground coal mines with many year mining experience in Vinacomin In the paper, the authors have listed the mining technologies applied to its coai mining operations in recent years with their key advantages and disadvantages as well Basing on the results from the evaluation ofthe coal reserves and the geological conditions of the mine, the paper has also proposed, the proper mining technologies for the coal seams at Mao Khe coal mine in the coming years Mo than Mgo Khe la mdt cac mo h^m 16 Id-n cua Tap doan Cong nghidp Than Khoang san Vi?t Nam Hien nay, md dang to chi>c khai thac 6" ca hai canh' canh Bac va canh Nam, canh Bac dang khai thac p h i n cdn lai cua tang -80 -^ -25, khau tan thu tang -25 -^ +30 va dao 16 chudn bi, khai thac tang -150 ^ -80, cdnh Nam dang khai thac tan thu t4ng -80 H- 16 via va chuan bi de khai thac tang -150 •^ -80 Hien tai, san lu'p'ng than khai thac bang ham Id dat tren 1,6 trieu tdn/nam va se tang len VO'I cac nam tidp theo Od dap LKng yeu cdu phat trJ6n san luo'ng, nang cao hieu qua khai thac va tan thu tai nguyen, vi^c phan tich, due rut kinh nghiem thi/c te cua mo va nghien cuu dd xuat cong nghe khai thac hp'p ly ap dung 6\hu kien khoang sang mo la rdt cdn thiet Danh gia dac diem dieu kien dja chat Theo tlnh toan, trCr lup'ng than cua mo IWao Khe tinh ddn muc -150 lai khoang TS TRU'O'NG DUC DU* ThS T R A N T U A N N G A N V/dn Khoa hoc Cdng ngh$ Md - Vinacomin Bing TT Ten via / 6 // Gid'i h^n ddnh gia Dac diem via than Chieu dfiy, m G6c doc, (Nh6-I6n/TB) (Nh6-i*n/TB) Cac via than cinh Bac 20 + 75 0,8 + 8,46 Via 10 -150-io via 2,15 45 0,80 ^ 7,49 20*70 Via 9b -150»l«via 3,15 46 0,8 - 9,5 10-80 -150-10 via Via 2,86 46 0,8-6,82 27-70 -150 4-10 via Via 1,64 45 0,8-7,93 28*78 Via? -150-10 via 45 3.63 0,8 * 7,63 20-70 Viae -150-10 via 45 3,23 0,8 * 6,82 36T80 Via -150 T 10 via 2.81 40 0.8 - 4,45 35-80 Via -150 4-10 via 1,42 40 Cac via than cinh Nam + 13.7 61 - Via 9a -150 * -80 65 9,1 6,2 T 9,87 63-68 -160-r-80 Via 7,4 65 0,8-11,38 50-80 Via -150-10 via 3.13 60 0.8-4.25 50-70 Via 8a -150-10 via 2.46 60 0,8-7,4 50^60 Via? -ISO* 10 via 2,34 65 0,8-3,48 40,80 Viae -150- 10 via 1,38 55 Tong cpng toan mo TriF lu'cng, 10'tan 26.967,9 7251.1 754.1 231.8 362.1 2.541.6 794.3 1,666.2 367.8 5.544,1 648.9 453.9 438.2 661,9 179,6 161,6 32.512,0 KIICNM s 8+9/2012" CNKT IIAM LO Thflng tin khoa hgc cflng ngh$ m6 W' 32,512,000 tin, 66 cdnh chilu ddy khai thdc Dilu ki|n tu-ong quan trD- lup'ng theo ylu Bdc la 26.967,900 t i n vd cdnh c l u tgo nhu- v$y Idm p^Crc t^p t l chilu ddy vd gdc die via Nam la 5,544.100 t i n (bdng 1) thfim phin dud-i trg vfa mOt dup'c t h i hi§n trfin hinh D$c diem chung v4 6& s6 vfa than Qua bdng vd hinh cho v&ch vk di try cua cAc via M$t s6 vTa than dup'c c l u thiy: than nhiF sau:tgo thdnh phdn Id-p phdn Id'p + TrO- lup'ng phdn b i Dd vdch: Do di^u ki$n c&u vdch vd phdn 16'p trg, kQp giCVa cdc khu vi/c via c6 chilu day ti> t^o trim tich nhip di^n hinh ndfi hai I6p d6 Id m$t t i p dd g6m 0,8+1,2 m la 1.809.600 tin, vdch via thu'd-ng t6n tgi mdt t$p sdt kit, bit kit ho3c cdt k i t chilm 5,6% t6ng tru- luong da ylu, kdm b i n vOng (vdch m6ng, c6 chilu ddy ti> phgm vi ddnh gia Trong gia) Id sdt kit, sdt than xen k^p 0,63+12,7m, trung binh khoiing d6, dilu ki|n gdc ddc via tir cdc ldp than mdng, T§p dd ndy 4m, Ddy Id t$p dd d l bj s$p 15°+350 Id 442,700 tin chilm thu'6'ng ddy tu 0,2 ^ 1,7m, dfii \df khai thdc phdn 16'p trg 1,4%; gdc d i e via 35M5° Id ch5 6'vdch via 9b, via 10 chilu Kit qud ddnh gid t6ng hp'p 728 400 t i n , chilm 2,2% va ddy cua t$p dd y l u I6n td'i tru- luong, phdn chia theo cdc g6c d6c via trfen 45" Id 638.500 2.5^4,3m, phdn bo khdng d i u y l u t6 chilu ddy, gdc d i e via t i n , chilm 2,0% tren via Ddy Id t§p dd d l bj t h i hi$n bdng 2, m i l + Tru- lup'ng phdn bo tdch, trup-t tilp xuc vd s^p 16Bing T6ng hpp trO- liyip-ng theo yeu to chieu diy, gOc doc qud trinh khai thdc, Nim Chieu diy via (m) tren tgp da yeu la Io'p bpt k i t S0,8 0,8+ 1,2 1,2 + 3,5 | > 3,5 mau xdm den c l u tgo phan \6fp GOc d6c Tong cOng (ngdn tan) mong, voi chieu day 2.0-^7,0m (OO) Triy Iwong cO Ihi iihailhOc (ngan tin) nut ne manh, tgp dd Ty 10 trO luvng (%) thuong xay hi^n tup-ng sgp 0 0 £16 Id- theo dgng keo theo Tren lap 0 0.0 0 bpt ket Id cat k i t mau xdm 12 313.7 442,7 687,9 4.183,1 15-1-35 phan IO'P day cau tgo tuong 37,9 1,4 23,6 12,9 ddi vijng chdc, nirt ne trung 728,4 730,8 049,7 952,7 binh, kho sap 16', vo'i chieu day 35 45 17,6 2.2 12,5 2,9 chung tu 5,0 -?• 15,0m on dinh 14 467,6 638 7.168,3 660,8 >46 Da trij Nam tru'c t i l p duo-i 2,0 44,5 20,5 22.0 tru via than la mpt tgp da mem 32 512,1 Tong 809 18.905.9 11 795,6 yeu gdm set kit, set than, xen cpng 100,0 5,6 68.2 36.3 kep cac Io'p than mong Chieu day cua tap da yeu ti> 0,5 -f 2,2m va thuo'ng gay nen hi^n tuong bung nen, lun nen, trupl tilp xiJc Tuy nhien, tgp da yeu thu6'ng phan bo khong deu, doi cho nam true tiep du'd'i trg via la tgp bpt kit day tuong doi 6n dinh Ndm duoi tap da yeu la lop bpt kit phan Io'p mong vo'i chilu day 1,6 -f 13,5m doi ch6 day td'i 30m Xen kep Io'p bdt kit la cac lop set than hogc cac vfa than mdng, cac thau kinh than co chieu day tri Hinh Moi tUKyng quan trir Iwiyng cdc via than khong lien tuc, doi cho dat theo yeu to chieu day va goc doc via KIICNM s o 8-f'; 2012* CNKr II.A.M U") Thflng tin khoa hpc cflng ngh$ m6 cdc khu vuc vfa cd chieu day tu 1,2^3,5m la Id-n nhit, d i n 18,905,900 t i n , chilm 58,2% tong tru' lupng phgm vi danh gia Trong dd, dieu ki^n gdc die via tu 15-5-35° Id 7,687,900 t i n , chilm 23,6%, gdc doc via 35-45° Id 4.049,700 tan, chiem 12,3% vd gdc doc via tren 45° Id 168.300 tan chilm 22,0% -1- Tru lupng phan bo cac khu vuc via c6 chieu day 16'n hon 3,5m Id 11 796 600 tin, chilm 36,3% ting tru' lup'ng phgm vi ddnh gid Trong dd, dilu kipn goc d i e tu 15-^35° Id 4,183,100 tin, chilm 12,9%, goc d i e via 35^45° Id 952.700 tan, chiem 2,9% va gdc d i e via tren 45° la 6.660.800 tin, chilm 20,5% Danh gia hien trang khai thac tai mo than Mao Khe Trong dilu kien dia chit, cau true v\a neu tren, nhung nam qua Cong ty than Mao Khe da nghien cuu vd dua vao dp dung nhieu cac logi hinh cong nghe khai thac, den nay, chu y l u dp dung cac cdng nghe, nhu 16 doc via phan tang va chia 16'p ngang nghieng su dung gia thuy luc di dgng XDY cho cac via than ddc, dong gdp san luong 16'n nhat 48,82%; cdng nghe khai thac cpt dai theo phuong chdng 16 bang cot thuy luc don vo'i san lup'ng d6ng g6p 36,35%; c6ng nghe khai thac co gi6'i h6a dong bo su dung td hop dan chong 2ANSH {cd mot 16 chg), ddng gop 4,81% san luong; cong nghe khai thac cot dai theo phuang, khai thac khau 16'p tru tran, chdng 16 bang gia thuy luc di dong XDY (cd mpt 16 chp*), VO'I sdn lup'ng dong g6p 4,55% Ngodi ra, cdc khu vuc cd dilu ki#n dia chit phuc tgp, trO' lup'ng nho kh6ng phu hp'p v6'i vi^c dp dung cdc so d6 cong ngh$ trln dup'c khai thac tgn thu bing cdc cdng ngh0 ddo Id lly than, khai thdc 16 cho ching g6 Ting hop sdn lupng khai thdc bang him 16 cua mo Mgo Khe hai ndm 2010, 2011 vd du kiln nam 2012 duoc t h i hl§n bang 3, Danh gia hi^n tr^ng ap dyng cong ngh^ - Sa c6ng ngh$ khai thdc 16 dpc via phin tang, khai thdc chia l&p ngang nghieng khau than bdng khoan n6 dieu khien da vdch bdng phwong phap pha hoa toan phan chong tdng cuung guung khai thdc bang gid thuy iijc di dong Cdng nghe khai thac da duoc dp dung nhilu nam nay, tho'i gian dau dp dung su dung vat heu chdng giu guong bing w g6, tu ndm 2003 d i n nam 2006, chuyin sang ching giu guong khlu bing vi ching thuy luc (cOt thuy lyc don kit hop vd'i xd hpp) vd tu nam 2007 d i n su dyng gid thuy lyc dl d|ng XDY ching giu cac guong khlu Ody cd the col Id m0t cdc logi hinh c6ng nghp truyin thing cua mo, vo'i san lup'ng ddng g6p hdng ndm tu 30 ^50% san luong chung cua tpdn mo, Du kiln nam 2012, san luong khai thac bdng c6ng nghp khoang 643 ngdn tin, chiem 44% san lu'png khai thac bang ham 16 Thyc t l tai Mao Khe, cdng ngh^ khai thdc 16 dpc via phan tang vd khai thac chia 16'p ngang nghieng thu6'ng duoc dp dung cac dilu kien nhu tong ho'P bang Qua thuc te dp dyng cho thdy, cdng nghe cd uu dilm CO ban la chi phi ddu tu ban ddu thip cd kha nang dp dung linh hoat cac dilu kien mo dia chat phuc tap, Bang Tong hap san luxfng than khai thac bSng ham Id San lir lyp'ng nhfi Thye t l nhilu khu vyc, cdc cfing n g h | khde khfing dp dyng dup'c hpdc kdm hipu qud thi cfing ngh$ v l n phdt huy dup'c vd mang Igi hi$u qua kmh t l tuong d l i tit, Nhupc dilm cua cfing ngh0 ndy Id vi ching cpt thuy luc don - xd khfi'p la iogi vi ching don chile Do vgy, tinh I n dmh kem hon so vo'i cdc logi vi chong to hgp (gid thuy lye gid khung); edc thao tdc qua trinh chong giu' chu y l u thyc hipn bdng thu cfing, chi phi nhdn lyc vd tho'i gian eho cong tdc chong giu 16 chp- Ion Ket c l u chong ndy khfing thich hop cdc so cfing ngh| khai thdc hg trln than n6c ehilu ddy via bien dpng, Ion ho'n chilu cao ching giu- cua cpt thuy luc don (dung logi - 22 hogc DZ - 25) Khi d6 thuong dua 16 cho v l khlu bam tru hodc bam vach via, ddn den ton thit tdi nguyen vd xay cdc su CO nhu tyt ndc hogc lun nen, lam giam muc dp an todn san xult - Sa cong nghe khai thdc cot ddi theo huung ddc, ca giai hoa ddng bp khai thdc sCr dyng td hap ddn chong 2ANSI-I, diiu khien dd vdch bing phuang KIICNM s o S-f';/2(IJ2* CNKT IIAM I.O 1,2 din 3,5m On djnh trunq binh din An dinh Din 35° On djnh trung binh din In dmh Khdng I n djnh din In dmh D l sdp d l din sdp d l trung binh TU kdm bin vOnq trfif Idn BitkV phdp phd hda todn phin Cfing ngh| khai thdc ndy da dup'c dp dyng tu' ndm 2008 sau ndm dp dyng din da khai thdc dup'c cpt (5 cpt via cdnh Bdc va cpt via cdnh Nam) L/u dilm cua so cong n g h i la giam duoc cac nguy ca m i t an todn tu su sgp dd vdch qua trinh khai thdc cdc via mdng din day trung binh d i e nghieng din doc dung nha bp phdn khau than CO buo'c khlu nhd vd dich ehuyin t l hap nhfi' eo cdu tu trupl theo chieu doc tac dfing cua khoi d i t da sap dl phia tren ddn vd tu trpng cua to hap; quy trinh cfing nghe va thao tdc ky thugt tuang dli don gian, phu hap vfi'i trinh cong nghp cua cac mo hdm Id Vi^t Nam Nhu'oc diem co ban cua cfing nghe Id phai di ehuyen vd lap ddt to hop dan chong d l chuyen dipn nhieu, chieu dai cpt khai thac theo dp dfic khong 16'n, kho khan cong tac dao, chdng 16 thuang khd-i diem, di lgi va tri 16 thuang dgng "gliJ' hgu" va chi phi g l cao T u thyc t l dp dyng tai Mao Khe, dieu ki^n dp dyng cong nghp duac tong hop bang Thflng tin khoa hgc cong ngh$ mfl Sa dd cong ngh0 khai thdc cQt dai theo phirang, khai thac bang Id chQ try hg trin khau than bing khoan no dieu khiin dd vdch bing phirong phdp phd hda toan phin, chdng giU Id chQ bing gid thuy lyc di ddng Cdng nghp khai thdc da duoc dp dyng tu ndm 2006, tu d6 den nay, hang ndm md luon c6 mot 16 cha hoat dpng, Uu dilm noi bgt cua cfing nghe ndy Id so vfi'i gid khung va ddn ching tu hanh, gid thuy luc c6 tinh co dong cao, tu di chuyin nhp nhang vd thuan tipn cho cdng tdc vdn ehuyen, lap dat hay thao do- 16 cho; chi phi d i u tu ban dau khdng qud 16'n, phgm vi dp dung tuang d l i rpng, ca dieu kien dia chit phuc tap, vfa kem fin dinh chieu day va gdc doc via biln dpng cd theo phuang vd huang doc Nhuoc dilm CO ban Id, gia thuy lyc di dong khdng co lien kit khung, lien kit giiJa cac vi chfing v6'i bang day xich nen gdc d i e 16 cho a gioi hgn tren cua dieu kien dp dung, a = 30° -^ 35°, cong tdc dl chuyin vi chdng tiln guong d l xay bi chdng xd, gay kho khan cho cong tac khai thac 16 cho, dac biet n6c, ndn 16 cha kem on dmh Pham vi dp dyng cua cong nghe t h i hien bang l i n g hop mpt so chi tieu kinh t l , ky thuat co ban cua cac cong nghe ap dung duoc thi hien bang De xuat cong nghe khai thac hap ly va quy hoach cong nghe cho cac khu vyc via than mo Mao Khe w Bang C h i l u ddy via Dd I n dinh v l c h i l u ddy Gdc d i e via Dd An dinh v l qdc d i e On djnh trunq binh d i n An djnh 45° d i n 90° Dd vdch tryc t i l p Dd vdch CO ban On d|nh trunq binh trd idn D l sdp d i n sdp dA trunq binh B i n v&nq trunq binh d i n b i n vunq 1,1 d i n 2,2m Dd try tryc t i l p Dfi cunq cua than On djnh trunq binh d i n I n djnh Bllky • BAng C h i l u ddy via Dfi An dmh v l c h i l u ddy On dinh trunq binh d i n An dmh Gdc d i e via DO I n dmh v l qdc d i e D i n 35° Dd vdch tn^c t i l p Dd vdch CO ban Ten chi tieu Conq suat N^nq s u i t On dmh trunq binh d i n An djnh Khdnq An djnh d i n An dmh D l sdp d i n sdp dA trunq binh Tip b i n v&nq trunq binh trd ldn Batky Dd try tryc t i l p D6ci>nq ciJa than Bang TT 3.5m d i n 7,0m Dem vi tinh T/n5m T/cSnq San ItFcnc(than (10' LOchq Locha CGH GTL 120 100 lin) LOchqi LiDVPTva N.nqhienq TLB 160 140 7.52 7.21 4.40 7.20 m'/IOOT Chi phi thuoc n6 Kq/IOOOT Chi phi kip no Cai/1000T 35,8 1.7 130 10,4 160 160 650 800 800 Chi phi iu'6l thep Kq/IOOOT 360 660 280 45 65 Chi phi q5 3.0 Dau nhu hOa Kq/IOOOT 85 16 c h u i n bl m/IOOOT 6,0 16.4 20-25 Ton that 8,0 26 30-35 % Kit qua danh gid dilu kien dja chit, ky thuat md Mao Khe cho thay, tru luong than ehu ylu tap trung a cac khu vuc via khdng thugn lai cho dp dung cfing nghe co gid'i hda khai thdc Phan trCr luang than co kha nang dp dung cfing nghe CO gid'i hda khong Ion, chi khoang 757 ngan tan, do, chu y l u phdn b l cdc khu wc via cfi chilu day mong va trung binh, gdc ddc dung Trong dilu kien do, tren co so' kinh nghiem vd ngoai 65 nu6'c va thuc t l dp dung cac cong nghe khai thdc a mo than Mao Khe, d l tai de xult lya chpn, djnh hud'ng phdt triln cdng nghp khai thac va quy hoach dp dyng cho cdc khu vuc via nhu sau: - Doi voi cac khu vuc via CO kha nang dp dung cdng nghe cofgi&i hoa: Tilp tuc phat tnen dp dyng cdc sa d l c6ng nghe khai thac cpt ddi theo huo'ng doc, khau toan bo chilu day via, su dung to hop dan ching 2ANSH KIICNM SO S+^/ZOn* CNKT IIAM LO âã Thftng tin khoa hgc cflng nghQ m6 Doi V&I cic khu v^iv via khong cd kha ning ip dvng cong ngh^ cor gim hda + CSc khu vi,i'c via than 06 chi^u day trung binh g6c d6c thoai tkn d6o nghiSng, ti^p tyc iva chpn ip dyng so 3,5 35 083,0 15.6 Sa CNKT cPt ddl theo phuang, khai thdc 16 cha try hg trin thu h i i than noc, khau than bdng khoan, no min, ching giu' IP cha bing gia khung thuy lyc di dpng cho via die >3,5 35-45 655,9 2,0 CNKT 16 dpc via phdn tang, khau than bdng khoan no IP khoan ngdn hodc 16 khoan ddi, chong tdng c y p n g guang khai thdc b i n g gid thuy lyc di dpng hodc ddn t y hdnh (16 dpc via phdn tang) 1,2 + 3,5 >45 908,3 8,9 Sa CNKT chia IPp ngang nghidng, k h i u than bang khoan no min, chong tdng cuPng guong khai thac bdng gia thuy lyc di dpng, gid khung thuy luc di dpng hodc ddn chong ty hdnh >3,5 >45 621,0 26,5 Cac so dp cong nghp khai thac khac nhy dao 16 l i y than hodc khai thac 16 chp c h i n g b i n g vi chong g i , 574,5 7,9 Tong cong 32.512,0 100,0 K I I ( N M S ( ) S + ' ; 21)I2»( \ K T I i \ \ I LO Th6ng tin khoa hpc cflng ngh$ m6 phap pha hoa todn phin, chong giu- 16 cha bdng gid khung thuy lyc di dpng, logi su dyng cho via doc + Cdc khu vuc via than eo chieu ddy trung binh d i n ddy, doc din doc dung, tilp tyc lya chpn dp dyng cong nghp khai thac lo doc via phdn ting hogc chia Id-p ngang nghieng, khlu than bang khoan, n l min, dilu khiln dd vdch bdng phuong phdp phd hoa todn phin, chong tdng euo'ng guong khai thac b^ng gid thuy lyc di dfing, Doi vfi'i cac khu vyc via day, doc dung, fin djnh v l chilu ddy, xem xet dp dyng efing nghe khai thdc chia lap bdng, "khlu than bdng khoan, no min, dilu khiln da vdch bang phd hoa toan phdn, chong tang cufi'ng guong khai thdc bang lUB CHON SO DO THI CONQ CilENG DlitiQ chu y l u cho phuc hfi ndy Them vao la nu'6'c mua thdm qua cac 16'p dat b l mat eung la ngufin edp nuo-e lan Nhu vay, giua song Hong va phuc he chua nuoc De tu co m i l quan he thuy luc true tilp Theo ket qua bom thu nghiem, he s l t h i m thau thay d l i tu lOm/ngay dem den 60m/ngdy dem, he so dan dp tic 35m^ din 718m^/ngdy dem Tu nhijng dac dilm dia chit cong trinh, thuy van cua khu vuc, d l xuat lua chon so d l thi cong gilng phli hap, cy the nhu sau; - Phdn cfi gieng su dyng phuong phap khai dao bdng 16 thien d l dam bao an toan vd don gian thi cong '9| hop tru luang, ddc dilm dilu ki$n dja chit - ky thugt mo, hifin trgng efing nghfi khai thdc, d l tdi dd lya chpn vd d l xult mfit sfi giai phdp ky thudt, cdng ngh$ khgi thdc hop ly cho phin tru lup'ng muc -150 - Ddi vdi cdc khu vyc + Ifi via cua mo than Mgo khde, via mong, doc nghieng Khe, Trong qua trinh triln va doc difng, via rat khong khai dp dyng, c i n t i n g hap, on djnh, dd vdch vd da try via b l sung thfim cdc tdi lifiu thu duac, nhdm Idm sang to han khong on djnh cdc dilu kifin dja chat ky thudt Tuy theo tu'ng dilu kipn cy mo tung khu vyc via than t h i eua tung khu vyc, to chij'c quy hogch khai thdc tgn thu bing cac Kit qua nghien cuu Idm co cong nghp ddo Id lly than hogc so d l Cdng ty TNHH MTV than khai thdc 16 cha ching g l Mgo Khe co nhung djnh hud'ng Quy hogch dp dyng cfing vific Igp ke hogch khai nghp cho mfi Mgo Khe duac thdc cho nhOng nam td'i, nhdm ting hap bdng ddp ung yeu cdu phdt t n l n san luyng va ndng cao hieu qua Ket luan Tu kit qua danh gia ting khai thdc cua md./ gid khung thuy lyc di dfing hogc ddn ching ty hdnh efi kit c l u thu hli than nfic, ding thfi-i, nghien cu'u ndng cao chilu cao phdn ting khai thdc bing vi$c n6 edc l5 khoan ddi su dyng kip n l vi sai phi dien (TiSp theo trang 14) - Khi xay dung xong mieng gieng su dyng cdc thdp true cfi dmh khai ddo phan than gilng, su dung so thi cong phfii hop de tdng toe dp thi cong, - Khi khai ddo den dp sau -400m tien hdnh mo" via, khai thac cdc via than 6" muc -400m, d i n g tho'i dao sau them gieng d i n muc -600 Khi thi cfing co gieng vd doan gieng g i n b l mat, ddo dat da den dau ddnh chim vo chfing den d6 Phuang phap dao ndy han che anh huang den fin djnh be mat d i t , k i t hap chfing tham each nuo-c t i t se khong gdy anh huo'ng d i n ngufin nuac, cay trfing khu vuc thi cong Ket luan Trong dieu kien dja chit phuc tap nhu tgi khu vyc Dong bang song Hfing, viec lua chon sa d l thi cfing gieng dung phoi hap se dam bao duoc tien dp thi cong, d i n g tho'i hgn che anh huo'ng den nguon nuo'c, cay trong khu vuc thi cong./ Tai lieu tham khao: Nguyen Cong Trjnh Xay dyng gieng dirng, Tru6ng Dai hpc IVId-Dia chat Ha Ndi nam 1996 Nguyen Van Dwac, Vo Trpng l-lung, Cdng nghe xay dyng cong trinh ngam Ha Npi 1998 Kaztoria va nnk, Xay du'ng cdng trinh ngim va md tap va 2, Moskva 2001 vm/w.dh-shaftsinking com KIICNM SO 8+9/2012* CNKT IIAM LO ... mo tung khu vyc via than t h i eua tung khu vyc, to chij''c quy hogch khai thdc tgn thu bing cac Kit qua nghien cuu Idm co cong nghp ddo Id lly than hogc so d l Cdng ty TNHH MTV than khai thdc... phin, chong giu- 16 cha bdng gid khung thuy lyc di dpng, logi su dyng cho via doc + Cdc khu vuc via than eo chieu ddy trung binh d i n ddy, doc din doc dung, tilp tyc lya chpn dp dyng cong nghp khai. .. k h i u than bang khoan no min, chong tdng cuPng guong khai thac bdng gia thuy lyc di dpng, gid khung thuy luc di dpng hodc ddn chong ty hdnh >3,5 >45 621,0 26,5 Cac so dp cong nghp khai thac