Thong tin khoa hoc cong nghe mo JS NGHIEN Ciru LITA CHON GIAI PHAP DIEU KHIEN DA VACH CHO DIEU KIEN VIA 4 KHE CHUOI Cong ty T r a m MTV 91 Tong Cong ty Dong B^c After providing the mining conditions,[.]
Thong tin khoa hoc cong nghe m o JS NGHIEN Ciru LITA CHON GIAI PHAP DIEU KHIEN DA VACH CHO DIEU KIEN VIA KHE CHUOI Cong ty T r a m MTV 91 Tong Cong ty Dong B^c After providing the mining conditions, the paperTS TRU'aNG DUC DU" TS DAG H N G QUANG refers to the selection of the solutions for controlling KS TRAN MINH T I ^ N the ground pressure as well as the flowsheets applied to the coal seam if at Khe Chuoi coal mine The ' Vien Khoa hoc Cong nghe Mo - Vinacomin paper also introduces the technical and economic index obtained after applying these flowsheets / - j ^ i e n nay, Cong ty TNHH (fMJuiy 91 dang tien hanh dao 16 va khai thac via mo than Khe Chuoi tCr mCpc +300 -^ LQ via Qua nghien CLKU, danh gia t6ng hp'p trCf lu-p-ng va dieu kien dja chat ky thugt mo tCi- mu-c +250 -H +330 via Khe Chuoi cho thay p h i n lo-n tru- lu-Q-ng t i p trung tgi cac khu vyc via day trung binh, doc thoai d^n nghieng (khoang 70% t6ng tru' lu-p-ng huy dpng vao khai thac) D | c diem da v i c h , try via Khe Chu6i nhusau: Da vach: nam ti^p giap via than la t i p bot ket mau xam sang, ran chac, It nCrt ne, phan lap day 0,3 -^ 0,5m, doi ch5 chi^u day phan lap len tai 0,5 - 0,8m thuQC logi phan lap trung binh d i n day Chieu day t i p bpt ket thay d6i tu- 4,2m -^ 6,5m, trung binh 5,1m Cu-ang dp khang nen trung binh Cn = 66,8 MPa Trpng lu-ang the tich trung binh y = 2,66 llrr? Ti6p theo la t | p cat k i t mau x l m , hpt vu-a, ran chac it nCrt r\k T i p c i t k i t CO c l u tgo p h i n lap vo'i c h i l u day cac p h i n I6p thay d6i tu- 0,6 + 1,0m, doi ch6 t | p cat k i t c6 xen ke c i c t i p b$t k i t dgng t h i u kinh ran chic, it n u l ne Chieu day cac t | p cat k i t thay d6i tu- 10,6m -^ 24,8m, trung binh 16,3m Cu-ang dp khang nen trung binh On = 99,8 l\/IPa Trpng lu-ang t h i tich trung binh y = 2,65 T/m^ - Da try gom cac thau kinh set than mem y l u c6 chieu day tu- 0,5 -H 0,6m, doi cho phan b6 try-c tiep du-ai via la t i p set k i t c6 chieu day thay d6i tu- 0,6 H- 2,7m, trung binh 1,87m, d l g l y hi$n tu-ang tm-ot t i l p xuc, lun nen K i t qua danh gia d | c diem da vach via Khe Chuoi cho thay, da vach a day thupc loai ben vu-ng va kho dieu khien Theo tinh chat s | p do, da vach thu$c iogi kho s | p vach n|ng Vi v|y, can phai nghien cu-u giai phap dieu khiln da vach nham khai thac hi$u qua va an toan Dieu khien da vach (hay dieu khien ap lye mo) la mot cong do?n r i t quan trpng nham p h i n b6 i^i lye da mo xung quanh ham 16 tac dOng len vi chong, khoi da nguyen, try than, khoi da Chen Hipn nay, ve ca ban c6 phyang phap dieu khien da vach la: phyang phap pha hoa, phu-ang phap chen 16 va KHCNM S6 10/2011* CNKT HAM L phu-ang phap vach tu- tu- Viec lya chpn phu-ang phap dieu khien da vach phy thupc vao nhieu y l u to, dac diem cau tao da vach ( d l dieu khiln, tu-ang doi kho dieu khiln va kho dieu khien), dac d i l m tinh chat cua via than (via day, via mong, than c6 gia trj cao hay gia trj thap ) va yeu cliu cua vipc dieu khien da vach (phai bao vp ho|c khong clln bao vp cac cong trinh tren m|t) la cac y l u to quan trpng nhat Theo mu-c dp ben vu-ng, da vach kho dieu khien du-pc chia lam logi sau: Da vach r i t y l u , s | p sau no khai thac than nen cong tac chong giijgu-ang khai thac rat kho khan - Da vach ben vu-ng, khong t y s | p sau di chuyin vi chong, chi s | p dipn Ip Ian sinh ap lye mo Ian h o l e cu dam mo, anh hu-o-ng d i n trgng thai on djnh cua 16 chg, CO s | p toan bp 16 cha, gay mat an toan d nu-o-c ngoai, d l khai thac vai cac via than c6 dieu kipn nhu- tren, cac mo ham 16 da s y dyng nhieu phu-ang phap Thong tin khoa hoc cong nghe m o dieu khiln da vach khac nhau, song t i p hp-p lai theo hai hu-ang chinh la: Hw&ng thCp nhat: SO- dyng cac giai phap va phu-ang ti$n tac dpng tryc tilp vao khoi da vach ben vu-ng, kho s|p 6e du-a da vach ve trang thai de s|p hole r4p trung binh Sau do, cong tie khai thac du-p-c tiln hanh theo sa cong nghe vai phu-ang phap dieu khiln da vach bang pha hoa toan phan Trong hu-ang dieu khiln da vach tren, ban chat la lam giam cac tinh chat ben vu-ng ca ly cua khoi nham thach, du-a chung ve trang thai de pha huy hole giam kich thu-ac s|p eung nhu- thay 6p\ d|e thCi pha huy cua khii nham thach vach via khoang khong d l khai thac, dam bao ap dung du-ac cac giai phap chong giudieu khien vach s|p toan phan sau khai thac an toan Cac giai phap va phu-ang tipn du-p-c sy dung phu-ang phap tren du-ac tiln hanh thong qua cac 16 khoan d l i phia tru-ac gu-ang khai thac (tu- cac du-ang 16 chuan bj hole ty cac vfa lln c|n hay khong gian phia tren via) Giam tinh chat ben vyng ca ly cua da vach bing nap no om hole bam hoa chat nhuchat tru-ang no- vai ap suit cao lam tang dp nCrt ne eung nhy kha nang tach lap cua nham thgch vach via Cong nghe sy dyng khoan no phia tryae gyang lam giam tinh chat ben vu-ng cua da vach thI hien tren hinh la Wuwig thiip hai: Su- dyng giai phap gian tilp nham giam tai tac dpng cua khoi da vach IIATCXTA-A UMs2^ a Khoan nd phia trif&c girang l^m giim tinh chit bSn vOng cua d^ v§ch } J r \ LOteitavinii Trurtilntpi hg|c >i> t i i b Sa dS cdng ngh$ khai thdc dieu khiin v^ch bSng cAc dai tru bio v$ Hinh PhuKyng phap dieu khien da vach kho s$p &nuw: ngoai kho s|p d i n luong gu-ang khai thac Cac giai phap bao gom su- dyng v|t lipu chen vao khoang d l khai thac; chl t^o cac loai vl chong d|c bipt c6 kha nang cin bang tai trpng dat da vach tac dpng len vi ching; dieu khiln da vach h^ dan dan qua trinh tiln gu-ang bang cac dai try than bao vp Sa d6 cong nghp khai thac dieu kiln vach bang cac dai try bao ve the hien tren hinh lb Kit qua ap dyng cac giai phap dilu khiln da vach kho s|p a nyac ngoai cho thay, cac giai phap theo hyo-ng thii- nhat c6 t h I ap dyng rpng rai nhieu dieu kipn da vach kho s|p Cong tac dieu khiln da vach khong lam thay doi cong nghp va trinh ty khau than Nhyp-c KHCNM SO 10/2011* CNKT HAM LO diem cua phu-ang phap la d6i hoi dau tu- Ian ve trang thilt bj xu- ly eung nhu- doi hoi ve trinh dp ky thu|t cao xu- ly khoan tiln tru-ac V6i giai phap thu- hai, phu-ang phap dieu khiln da vach hoan toan chu dpng theo dinh hu-ang cua ngu-ai, d§ thyc hipn va khong doi hoi trang thilt bj tien tiln Tuy nhien, nhu-p-c dilm cua phu-ang phap la gly phii-c t?p dly chuyin cong nghp khau than, giam ning suat va hipu qua khai thac Tgi Vipt Nam, qua trinh khai thac tgi cac mo than him 16 vung Quang Ninh eung da g i p mpt so vfa than c6 dieu kipn da vach kho s|p nhy via khu Canh Ga mo than Vang Danh, via 15 Bac Bang Danh mo than Cao Thing va via 46 mo than Thong tin khoa hoc cong nghe m o mhcvlatMiigtft T lai dly, Cong ty chuyin sang ap dyng sa cong nghe khai thac cot dai theo phu-ang, khau than bang khoan no min, ching giu- 16 cha bang cot thuy lye dan bam djch trong, dieu khiln da vach bang pha hoa toan phan, cong nghe d l cai thien du-gc mpt s6 ehi tieu nhu- ting cong suit khai thac va nIng suit Iao dpng song mtpc dp an toan han chl bu-ac gly cua da vach Ian (10 -^ 15m), cong tac dilu khiln ap lye mo g|p nhieu kho khan, chi phi v|t lieu va phu-ang tipn n6 phyc vy cho cong tie pha hoa da vach cu-o-ng bCpc cao IVlpt so ehi tieu kinh t l ky thult dat du-ac theo cac sa cong nghp khai thac da ap dung tai via Khe Chuoi du-pc Hinh Sa cdng nghe khai thac buong Id chv dieu khien da vach bang cic dai try than ap dyng cho via 46 mo than Hong Thai thI hien tren bang Kinh nghipm khai thac va H6ng Thai D l khai thac cac chuyin dipn nhieu (tu- ^ dieu khiln da vach kho sap via than nay, Vipn Khoa hpc Ian mpt cpt khai thac c6 tren thI giai va nu-o-c, Cong nghp Mo d l phoi hp-p vai chieu dai theo phu-ang tu- 70 -^ eung nhu- dieu kipn trang thilt cac dan vi khai thac than 80m) bj ky thult hipn eo cua Cong nghien cu-u v l du-a va ap Trong giai doan tu- nam ty TNHH MTV 91 cho thay, dyng sa cong nghp khai 2002 den nim 2007, tren ca giai dogn tru-ae mit, thac buong 16 cha, dieu so- cac kit qua dat du-ac cua viec ap dung cac giai phap khiln da vach bang cic dai try giai phap dilu khiln da vach tryc tilp 6e dieu khiln da kho s|p da ap dyng cho vach kho s|p cho via than bao vp (hinh 2) via 46 mo than Hong Thai, Khe Chuoi nhu- khoan no Kit qua ap dyng cho thay, C6ng ty TNHH MTV 91 eung tiln tru-ac, ho|c su- dyng hoa cong tac khai thac 16 cha dam da ap dyng sa cong nghe chit kho CO thI thyc hipn bao an toan, cac chi tieu kinh khai thac buong -16 cha, khiu du-gc phai dau tu- trang t l ky thu|t dgt du-p-c va gia than bang khoan no min, thilt bj, cong nghp phu-c tap khai thic cc t h I chap chong giu- 16 cha blng g5, Nhu- vay, vipc lya chpn giai nh|n dyac Tuy nhien, dieu khiln da vach dan phap dieu khiln da vach hgp phu-ang phap vln c6n cac dan bang cac dai try than d l ly cho dieu kipn via Khe ton t^i la san lu-ang v l nIng khai thac cac 16 cha tu- mu-c Chuoi vln phai thyc liipn theo suit iao dpng c6n thap (san +330 H- Lp via thupc via Khe hu-ang gian tilp nhlm giam lyp-ng tu- 2000 ^ 5000 Chuoi Qua trinh khai thac cac tie dpng cua khoi da vach tai tin/thang, nIng suit Iao dpng 16 cha tren dam bao an toln din luong gu-ang kho s|p ty 1,6 + 2,2 tin/ccng), chi phi dieu kipn da vach kho khai thac thong qua vipc dieu met 16 chuin bj v l ton thit s|p do, nhien, ton thIt tai khiln da vach h?i dan din than cao (chi phi met 16 tu- 30 nguyen v l chi phi met 16 qua trinh tiln gu-ang ^ 42 m/1000 tin, t i n thIt than chuIn bj cao nhy d l phin tich bang cac dai try bao vp nhuty 33 ^ 40%) 16 chp' phai a phin tren l\/lpt vai nIm tra KHCNM SO 10/2011» CNKT HAM L Thong tin khoa hoc cong nghe mo Bang1 Mot so chi tieu kinh te ky thuat dat duvfc cua cac sa cong nghe khai thac daapd mg tai via Khe Chuoi TT Ten chi tieu Don vi 10 Chilu day via trung binh Goc doc via trung binh Chilu dai 16 chg trung binh Trpng lu-gng t h I tich cua than San lu-gng than khai thac mpt dem San lu-gng than khai thac mpt thang Nang suat Iao dpng cong nhan 16 chg Chi phi thulc n6 cho 1000 tan than Chi phi kip n6 cho 1000 t i n than Chi phi g6 cho 1000 t i n than Chi phi met 16 chuan bj cho 1000 tan than Ton that than theo cong nghe m dp m T/m' T T T/cong kg cai m 11 12 So Iwang Buong Id cha CDTP chong CTL 2,2 2,2 25 25 50 50 1,7 1,7 150 180 3750 4500 2,6 380 265 1200 905 20 48 m 30 6,5 % 38 15 TrylhinbtovtBflictecjt T OBI hfnctrng khai ftteoiac^ MATCATA-A VlWripdliiCniamiAitvrhfcil^D m i u nhan t»c bang tit lai ThiOT|IWIi*