Nghiên cứu lựa chọn công nghệ khai thác chèn lò dưới các công trình cần bảo vệ trên bề mặt tại công ty than hòn gai TKV

Thong tin khoa hoc cong nghe m o 'NGHIEN Cl}U LU'A CHON CONG NGHE KHAI THAC CHEN LO Dircri CfiC CONG T R J N H C A N OfiO V E T R E N B E M0T TAI CONG TY THAN HON GAI - TKV Cai Da and Thanh Cong area belonging to Hon Gai Coal Company has owned a great coal reserves (about 16 million tons) under the surface objects needed to be protected, including the residential areas, civil constructions, high voltage transm isskin line towers, water bearing bottoms and working platforms The paper introduces the results from the research on the selection of the back filling methods applied to the above mentioned for mining the coal reserves under the surface objects needed to be protected, ensuring the investment efficiency as well as the safety of the surface objects needed to be protected Cdng ty than Hdn Gai -TKV duac giao quan ly khu md than h i m Id dja phgn thdnh p h i Hg Long, bao gom md Thdnh Cdng, Gidp Khau vd Cdi Da (md Cao Thang) Theo k l hogch, khu md Giap Khiu dy kiln se kit thuc khai thdc vdo ndm 2016, sau dd sesdt nhgp ve md Suli Lai, dd, didn khai thdc tgi cdc md Cai Od, Thdnh Cdng dang dan thu hpp D l dap ipng yeu d u san luang thai gian tdi, Cdng ty dang trien khai cdc dy an md rpng nang cdng suit md, nhu 'Thilt ke tri vd md rpng ndng edng suit khai thac ham Id md Cdi Dd, khoang sdng Suoi Lgi, khu md Cao Thing" vd "Khai thdc xuong sdu dudi mirc -75 md Thanh Cdng" Qua ddnh gid sa bO eho thiy, 35% tong trip luang than huy dpng cdc dy dn ndi tren, tuang irng, khoang 16,6 tripu tan ndm dudi cae doi tuang d n bao vp b l mgt, bao gom khu dan cu, cac cdng trinh ddn dyng, dudng dien cao thi, moong eu chipa nudc va mgt bang sdn cdng nghiep md, duac de lai ldm try bao ve, khdng dua vdo quy hoach khai thae Tgi cdc nude cd n i n cdng nghiep than phdt triln tren t h i gidi nhu Nga, Ukraina, Ba Lan, Dipc vd Trung Quoc, edng nghg khai thae chen Id dd duac dp dyng rOng rdi tip kha sdm, nhdm cdc mye dich Dilu khiln da vdch; Ngdn chgn syt liin, djeh ehuyen biln dgng eua cac tang dat dd ben trdn d l bao vp cdng trinh tren be mgt; Khai thdc khdng de Igi tn^ bao ve d l tdn thu t i i da tdi nguydn than; Chen lip khoang khdng gian KS NGUYEN MINH T U Y E N Cdng ty than Hdn Gai - TKV TS ue BiPC NGUYEN KS DLJ'aNGBO'CHAl Viin khoa hoc Cdng nghi Md- Vinacomin Bien t$p: TS Dao Hong Quang da khai thdc d l ngdn ngipa chdy npi sinh khai thac cae via than cd tinh ty ehay; Giam chi phi van chuyen dd thai tip cdng tdc ddo Id len be mat, dong thdi giam mu-e dO phdt thai tip cac qua trinh san xuat md mdi trudng xung quanh Nhd nhipng thdnh tuu nghien cuu ly thuylt eung nhu thyc tiln dp dyng cdng nghp khai thdc chen Id, cdc nudc da khai thde duae hang tram trieu tan than tip try bao ve eae edng trinh, doi tuang tren be mat nhu nhd cipa, edng trinh ddn dung vd cdng nghipp, c6ng trinh giao thdng van tai, d l i tuang chipa nudc Cy t h i nhu: Tgi Ba Lan, tip nam 1950 den nay, da khai thdc duac tren ty tan than tip try bao vp cac edng trinh tren b l mat nhu thdnh phi, nhd mdy, khu cdng nghiep ,ld cao Id luyen coc, v.v bang edng nghe khai thdc chen Id, diln hinh dd la md than ham 16 Bobrek-Centrum (01 Id cha) khai thdc dudi thdnh Bytom, md Wujek (01 Id cha) khai thdc dudi khu dan eu Ligota tgi thdnh Katowice, md Wieczorek (02 Id cha) khai thdc dudi dudng eao t i c A4 vd md Staszie (01 16 cha) khai thdc dudi tuyen dudng sdt quoe gia Bielsko - Katowice Tgi b l than Bihar (An DO) ndm dudi luu vyc sdng Damodar, ngudi ta da khai thdc duae tgp cdc via than day -^ 7m, d dO sdu tip 50 -^ 500m bdng each dp dyng cae giai phap khai thdc chen Id todn phan stp dung vdt lieu chen Id dd xit thai Nhgt Ban, giai dogn nhu-ng nam 1980, da dp dyng edng nghp khai thac chen Id d l khai thdc than dudi day biln vdi KHCNM S6S/20I5* CNKT HAM LO Thong tin khoa hoc cong nghe mo san luang tip 13 -i-14 trieu tan/nam, v.v Kinh nghiem khai thdc bdng phuang phap chen Id tai nudc ngodi cho thiy, triln vpng dua vdo dp dyng mgt so sa cdng nghe khai thdc Chen Id dieu kien cae vFa than nam dudi eae edng trinh can bao ve tren be mat eiia Cdng ty than Hdn Gai Id hodn todn ed ea sd, dam bdo hipu qua kinh te eung nhu an todn qua trinh khai thdc than Tip do, Cdng ty than Hdn Gai - TKV da hap tdc vdi Vipn Khoa hpc Cdng nghp Md - Vinacomin triln khai nghien cuu lya chpn edng nghp khai thae chen Id dk khai thae cae khu vyc vfa ndi tren Kit qua ddnh gid dgc dilm dilu kien d\a chat cac via than nam dudi cde cdng trinh be mat khai tnj-dng Cdi Dd vd Thdnh Cdng thuOe Cdng ty than Hdn Gai cho thiy, phan trip luang than d n khai thdc bdng cdng nghe chen Id duac phan ehia nhdm doi tuang ehinh, gom: (1) khu vuc ddn cu; (2) cdc cdng trinh cdng nghiep ddn dyng, bao gom mgt bang san eong nghiep md va he thong dudng dipn cao the; (3) moong chira nudc cu Ket qua ddnh gid sa bd chr ring, ting trQ" luang dja chit cdc tnj than bao vp cua Cdng ty than Hdn Gai id 16.612 nghin tan, dd, khu vyc Cdi Dd Id 4.636 nghin t i n ehilm 28%; khu vue Thanh Cdng la 11.976 nghin t i n , chi^m 72% Tuy nhien, trO lifong c6 kha nSng huy dOng vao khai thSc la 15.015 nghin tlin (chiem 90%), c6n khoang 1.597 nghin tSn khong du'O'C huy aOng nam o4c try bao v$ c6 kich thudc, trO iuong nho hole nam rai rac kho o6 kha nang kit n6i voi he thong cac dyong io ohuin b| chung cua mo Trong do, tru' iyong than chu yeu nam tru bao v0 khu dan cu khoang 10,1 trieu tan, chiem 67%, tiep theo ia tru iuong than nam duoi he thong duong di#n cao the khoang 3,1 trieu tan chiem 21 % PhSn tich trO iyong than n l m try bao v§ cong trinh b l m|t khu Cai Da va khu Thanh Cong, Cong ty than Hon Gai - TKV duoc the hien tren hinh Phan tich moi tuong quan giOa tS hp'p chieu day va goc d6c via voi tong trO lygng c l n chen 16 khu vyc nghidn cyu cho thiy, phin ion try lyp'ng nlm cac trg bao ve la cac khu vyc vfa day (ma3,5 m§t) chilm 92%, chu yeu thuoc pham vi via nghieng (15 - 35°) chiem 49,6% vi via doc nghieng (35 - 55°) chiem 29,8% Hinh the hien bieu phan bo try iyp-ng than nlm try bao ve theo cac mien chilu day va goc die 16000 14000 IS J3000 c *• •n Thinh C6ng ^ 10000 8000 1.1 es 2.778^— Ji Ddn cu Budng didn Cdng trinh ddn dyng Mdt bing SON Ddi tu-ang bao vp tren b l m$t Hinh TrU lw