Thong tin khoa hoc cong nghe m o i NGHIEN CllU LUA CHON CAC GIAI PHAP CONG NGHE KHAI THAC HUP LY CHO CAC KHU VUC VIA THAN THUOC CONG TY THAN HON GAI - TKV In recent years, for obtaining the underground coal output, ThS TRAN TUAN NGMi Hon Gai coal company has applied some mining technologies ThS.DAMHUYTAl such as longwall advancing on strike with using sliding hydraulic KS NGUYEN NGOC GIANG supports, layer mining technology with using hydaulic props KS NGO QUANG THANG Under the complicated geological conditions with present mining Wen Khoa hoc Cong ngh$ Mo - Vinacomin technologies, the coal output and labor productivity from the Bi$n t$p: TS Dao Hong Quang longwall are nigh high Basing on the evaluation of the present application of the mining technologies and the geological conditions of the coal seams, the paper has selected some mining technologies suitable to the geological conditions of the coal seams at Hon Gai coal company LDatvdndi Cdng ty than Hdn Gai hien dang dupe TKV giao quan !y va khai thac d cac khu Sudi Lai vd Binh Minh vdi sdn lup'ng khai thdc him Id hang nam t u 1,3-^1.6 triOu tan/nam Theo k l hoach, nam 2015 sSn lupng khai thac than him Id cua Cdng ty la 1,7 triOu tan vd se tang d i n cac nam tilp theo D l dat duoc san lupng nhu tren, hipn Cdng ty c i n huy ddng tCr 18-^22 Id chp' hoat dpng ddng thdi, vdi cac cdng nghO khai thac dang dp dung: cdng nghe khai thac opt dai theo phuong, chong giu Id cha bang gia thuy luc di ddng d cdc khu vyc via day, doc thoai den nghieng (chilm ty lp Idn la 64,2% tdng san lup'ng khai thac h i m Id); cdng nghp khai thdc chia Idp ngang nghieng va doc via phan tang, chdng giu bang gid thuy luc di dpng cho cac khu vyc vfa day trung binh den day, doc (chilm 32,1%); cdng nghp khai thdc cpt dai theo phuong, chlng giu* Id chp' blng cpt thuy luc don cho cdc khu vyc via day trung binh doc thoai d i n nghieng (chilm 1,8%) Ngodi ra, mpt so khu vyc khai thdc Id chp chong g5 vd ddo Id de tan thu than cung tham gia san lup'ng nhung khdng nhilu, chi chilm 1,9% tong san lupng khai thac him Id cua Cdng ty Vdi dilu kidn dja chit md phuc tap va cdc cdng nghe khai thdc hipn tai Cdng ty khd hoan k l hoach dipoc giao Vi vay, vipc nghien cuu lya chpn cac giai phdp cdng nghe khai thac hop 1]^ nham nang cao cdng suit, nang suit lao dpng la rit c i n thilt Danh gia kit qua ap dung cdc so' dd cong nghe khai thac thai gian gin day So lipu thong ke va ty lp san luong tu cdc Id ch(7 giai doan 2012-^2014 cua Cdng ty than Hdn Gal duoc t h i hien bang va hinh [1] Kit qua dp dung cdc so dd cdng nghp khai thdc nhu sau: 1) So cdng nghp khai thdc cpt ddi theo phuong, khai thac blng Id chp tru trin, khiu than bang khoan no min, chong giu Id chp blng gia thuy luc di dpng, dilu khien da vach bang phuong phap phd hda toan phln: cdng nghe duoc dp dung dilu kien via than day, gdc die thoai d i n nghieng Thyc te dp dgng tai Bing Sin luryng khai thic ti> cic Id chQ cOa Cdng ty than Hdn Gal giai do^n 2012-^2014 TT NSm khai thic 2012 2013 2014 T6ng Tyl#(%) Ld chQ TLB LdchvGTL 19.093 30.601 22.390 72.084 1.8 901.065 867.865 836.658 2.605.588 64,2 Than tir khai thic id chpr (tan) Ldchp Bio Id liy Lo cha gd N nghieng than 323.068 7.531 14.651 472.026 11.869 10.396 506.491 2.186 32.225 1.301.685 21.586 57.272 32.1 0.5 1.4 Tong than K.Thic 1.265.408 1.392.757 1.399.950 4.058.115 100 KHCNM S 7/2015* CNKT HAM Ld Thong tin khoa hoc cong nghe m d hoach san lupng nhung nam tdi Id hit sue khd khan Do vpy, vipc ddi mdi cdng nghp khai thac than him Id nhdm nang eao cdng suit, nang suit lao ddng, nang cao mCrc dp an todn vd cai thien &\eu kien lam vipc cho cdng nhan Id hit su-c can thiet Tuy nhien, neu so sanh vdi ede edng ty khai thac than ham Id vung Quang Ninh cd dieu kipn dja chat ky thu^t md tuong ty dp dyng gid khung thuy lyc di dpng, vdi cdng suat 150 -^ 250 ngdn tdn/nam, nang suit lao dpng 4^ tan/cdng, cao hon 150^250% so vdi gid thuy lyc dl dpng eung dieu kipn cua Cdng ty dang dp dyng Hinh BiSu dd (j? 1$ sin lux?ng cOa cic cdng ngh$ ip di^ng (thdng kd giai do^n 2012^2014) Cdng ty cho thay, cdng suit khai thdc dpt tu 72.000H-222.000 tIn/nam, taing binh 98.740 tan/nam; nang suit lao ddng dat tu 4,0^7,5 tin/cdng, trung binh 4,8 tan/cdng Vdi vipc dp dyng gia thuy lyc di dpng trang khai thdc Id chp try tran, san lupng than tang len rd rpt so vdi cac Id cho l tren 28% giam xuong edn tu 20^25% (giam ton that nd hp tran ed dilu khiln) - So d l cdng nghp khai thdc cpt dai theo phuong, khiu than bang khoan no min, chong giu Id chp bdng cdt TLD vdi xa khdp, dilu khiln d^ vdch blng phuong phap pha hda toan phln: cong nghp dupe dp dung (^lu kidn vfa day,trupg,t)lnh, dicthoai d i n nghieng Hien nay, Cdng ty chr cdn mdt day chuyen edng nghp khai thde chlng giu bang cpt TLD Ket qua dp dyng cua cdng nghe cho thiy, cdng suit khai thdc dat ti>'57.600-^69.000 tIn/nam; nang suit lao dpng dat 3,3 tan/cdng; chi phi g l 17,1 m3/1Q00T; t i n ^ thit than 22,6% Cd t h i thay, edng suit va nang suit lao dpng dpt dupe chua cao, nguyen nhan chinh la dieu kipn dja chit vfa phipc tap nhu phay phd u l n nep, khu vyc cd tru lupng nhd, chieu ddi theo phuong vd hudng d i e ngin, phai chuyen dIOn nHilu lam gian dopn thdi gian khai thdc Thuc t l , ty lp san lugng khai thdc ndm g i n day cua cdng nghp chi chilm 1,8% ting san lupng khai thac him Id cua Cdng ty T6m lai Nhin chung, cae so d l edng nghp dang dp dyng tpi cdc khu vuc thudc Cdng ty than Hdn Gai tuong doi phu hpp vdi dilu kipn dja chat, ky thupt md Cdc cdng nghp ndy da ddng gdp san lugng dam bao k l hopeh thdi gian qua Tuy nhien, m0t s6 khd khan v l dilu kien 6\a chit, vpt liOu chlng giu Id chg chi la cpt thuy lyc don, gid thuy lye di dOng, ndn edng suit Id chp vd ndng suit lao ddng ehua cao Do vay, ein phai xem xdt lya chpn cdng nghO vd vat lieu chlng mdi phu hop d l nang eao cdng suit, nang suit Id chg Nghidn cuu lua chpn cac giai phap cdng nghp khai thac hp^p ly D I lya ehpn cdng nghe khai thdc phu hgp vdi dilu kiOn dja chit, k9 thuat md eho eac khu vyc thupc khodng sdng Cdng ty than Hdn Gai quan ly, Vipn Khoa hoe Cdng nghe Md da tien hdnh ddnh gid tong hgp tru lugng cac via than khu vuc nghien euu Kit qua danh gia cho thay, tdng tru lugng pham vi danh gia Id 18.109,4 ngan tan, dd, trlJ- lugng tap trung ehu y l u d eac via than ed chilu day > 3,5m, Id 16.182 ngan t i n (chiem tdi 89,4%) Trong dd, gdc doe tu 15° £ a < 35° Id 8.442 ngan tan (ehilm 46,6%); gdc doc < IS'' Id 3.346 ngan t i n (ehilm 18,5%) Ddi vdi cdc via than cd chilu day tu 1,21-5-2,5m, tru' lugng Id 847 ngan ^ (chilm 4,7%) Trong dd, gdc d i e tu ° ^ ^ la^70 ngdn t i n (chilm 2,0%); gdc die tu 36 < a < 45° Id 428 ngan tin (chilm 2,4%) TrO lugng ede vfa than ed chilu day tu 2,51-^3,5m la 1.080 ngdn tan (chilm 6,0%) Trong do, gdc d i e tu 15° < a < 35° Id 618 ngan t i n (ehilm 3,4%); gde doc tu 35°