292 Tuyin tap cong trinh Hdi nghi Cff hoc todn quoc Ky niem 30 ndm Vien Cff hge vii 30 inim Tgp chi Cff hoc Hd Ndi, ngdy 8 9/4/2009 Nghien ciiu va ap dung cong nghe khoan thao khi tien truoc de nang c[.]
292 Tuyin tap cong trinh Hdi nghi Cff hoc todn quoc Ky niem 30 ndm Vien Cff hge vii 30 inim Tgp chi Cff hoc Hd Ndi, ngdy 8-9/4/2009 Nghien ciiu va ap dung cong nghe khoan thao tien truoc de nang cao hieu qua va an toan khai thac cac mo than ham 16 khu vuc Quang Ninh Nguyen Xuan Thao, Nguyen Tran Tuan Vien Khoa hge - Cdng nghi Md Pham Quang Hieu, Tran Dinh Kien, V5 Trong Hung Trudng Dgi hge Md - Dia chdt Hien nay, cdc md than hdm Id dang phdt trien khai thdc xudng sdu Sdn hrgng khai thdc ngdy mot tdng Liegng metan vd cdc ddng hdnh ihodt tic cdc via than qud trinh khai thdc cdng idn Ddy Id mot hiem hog Idn ddi vdi cdng Idc an todn vd mdi trudng khai thdc md Theo die bdo cua Trung tdm Qudn ly md than Viet Nam - Vien Khoa hoc Cdng nghe Md, thi cdc md than khai thdc xudng sdu deu thuoc logi md nguy hiem ve mirc thoat metan qud trinh khai thdc Mot cdc gidi phdp ldm suy yeu vd gidm liegng metan thoat tic cdc via than qud trinh khai thdc Id khoan cdc Id khoan ddi lien trirde thu hdi metan vd cdc ddng hdnh lie cdc via than trudc khai thdc Phdn Idn metan vd cdc ddng hdnh khde tdn tgi Irong via than a trgng thdi bdm dinh, lien ket hda ly ben vimg vdi than Mudn thu hdi chiing cdn tgo cdc cdc khe niet (kenh ddn) nhdn tgo vdi kich ihiedc vi nhd via than Trong bdi bdo, cdc tdc se gid trinh bdy cdc ket qud nghien ciru cdng nghe khoan ket hgp vdi icng dung phicang phdp "edt tdch via than " bdng chdt long de tgo cdc khe nirt nhdn tgo via than Tiem nang metan cac mo than khai thac ham 16 viing Quang Ninh - Viet Nam Khi metan va cae loai khf tir nhien thoat tir cae via than qua trinh khai thac la mgt van de quan trgng va cue ky nguy hiem doi vai cae mo than khai thac ham 16 Hien nay, cae mo than khai thac ham 16 a viing Quang Ninh Viet Nam dang tiin hanh khai thac a chiiu sau tir -150 in din - 200 m; tirong lai khong xa se khai thac toi chieu sau -300 m den - 400 in San hrgng than khai thac cang tang, dong nghTa voi lugng metan va tir nhien khac thoat tix cae via than qua trinh khai thac cang lan No se la tac nhan gay tiem an mgt hiem boa rat Ion doi voi cong tac an toan va moi trirong khai thac mo eung nhu lam giam hieu qua khai thac Theo ket qua nghien ciru ciia Trung tam an toan M6-Vien Khoa bgc Cong nghe Mo thi khai thac xuong sau, eae mo than khai thac ham 16 a viing Quang Ninh diu thuge eae loai ni6 nguy hiem ve metan.Theo ket qua danh gia so' bg, voi chieu sau khai thac hien va xuong sau toi -400m, trir lirgng tai khu vire khai thac ham 16 eo khoang 4,68 ty m"^ (bang 1) Day la eae khu vuc can duge nghien ciru de eo cac giai phap thao qua trinh khai thac, dam bao giam thieu nguy co' chay no va phuc vu eho nhu eau phat trien nang hrgng Nghien cieu vd dp dung cdng nghi khoan thcio tiin trude di ndng cao hiiu qud vd an todn khai thdc cdc md than hdm Id khu vuc Qudng Ninh 293 Tiem nang metan eae mo kha Ion, day la nguon nhien lieu eo gia tri kinh ti eao eho cong nghiep va doi song dan sinh, nhung eiing la hiim boa Ion dii vai cong tae khai thac mo Cae mo khai thac ham 16 a Viing Quang Ninh, thai gian 10 nam tro lai day (199^ 2008) da xay 11 vu tai nan lao dgng metan, chiim 9,4% tong s6 cac vu tai nan lao dgng ham 16; so nguai chit 41 ngiroi, chiim 22,9 % ting s6 lao dgng bj tai nan lao dgng ham 16 Dac biet, 11-1-1999, tai mo Mao Khe da xay vu no metan lam 19 cong nhan bj thiet mang Bang Dir bao trir lugng than khai thac va metan o mgt s6 khu vuc khai thac hSm 16 a viing Quang Ninh Ten khu vuc, mo Lg Tri Binh Minh Mire khao sat, m Mao Khe Ki Bao Nga Hai Do chira trung binh, mVTKC Trir lirong khi, 10-^n^ + 100-0 29.159 0,69 16.498 100 12.252 1,32 13.262 -100 200 26.851 1,95 42.935 -200 - -300 34.150 2,50 49.508 Cong 102.412 100 56.874 3,98 185.614 76.184 2,36 147.431 100 200 Ha lam Tru' lirgng than (10^ T) Cong 133.058 100 65.879 -100 200 72.051 -200 - -300 122.203 333.045 0,73 39.435 1,25 73.852 55.706 1,79 81.765 -300 400 68.889 2,38 134.443 Cong 262.525 + 100-0 3.304 0,31 0.840 100 15.321 1,93 24.297 -100 200 162.458 3,56 473.981 -200 - - 300 181.467 4,80 714.254 Cong 362.550 LV 300 113.378 - 329.495 1.213.372 12,52 1.163.984 , Cong 113.378 + 100-0 42.035 1,47 50.761 100 59.714 5,07 248.255 -100 200 56.864 5,86 273.173 7,04 376.635 8,85 418.395 - 0 - - 300 ' ' ^ 65.243 -300 400 57.654 Cong 281.510 1.1,63.984 L367.219 Nguyin Xudn Thdo, Nguyin Trdn Tudn, Phgm Quang Hieu, Trdn Dinh Kiin, Vo Trgng Himg 294 Mirc khao sat, m Ten khu vuc, mo Trang Bach Trir lugng than (10-'T) Tru' lirong khi, 10 m Do chua khf trung binh, m-VTKC +300-+200 2.751 1,08 2.436 +200-+100 5.781 2,11 10.002 +100-0 8.548 3,23 22.640 100 17.662 2,34 33.890 -100-^-200 18.267 1,27 19.023 -200 - -300 16.314 4,55 60.868 Cong 69.323 148.859 Tong cong 4.678.178 Phuong phap nghien ciiu va quan ly metan tai cac mo ham 16 vimg Quang NinliViet Nam Truoc nhirng nam 1985, tae gia Nguyen Tien Bao da nghien ciru v i khf metan Cac kit qua nghien cuu eiia tac gia tap trung vao xac djnh djnh lugng va djnh tfnh khf metan va cac loai thien nhien co cac via than vung mo Quang Ninh, thong qua cac mlu khoan than a cac giai doan tham d6, tim kiem ty my Cae ket qua nghien cuu da lam sang to ngu6n goc, phan va qui luat phan b i metan eung nhu cae loai khf thien nhien khac trSm tfch chira than a Quang Ninh Khi metan la phan ehii yiu ciia khf cac via than, ham lugng bien dii tir 0% din 99%, trung binh khoang 40%; da vay quanh tir 0,5% din 86,6% Ham lirgng metan tang dan theo chieu sau va phan b i khong ding diu eae khu virc than 6' viing Quang Ninh Khu viic Ki Bao thay doi tii' 29% - 90%, trung binh 70% Khu vuc Hon Gai- Cam Pha tir 0% - 52%, trung binh 50% Vimg Uong Bi Mao Khe tii' 2,6% din 52%, trung binh 30% Vung Bao Dai tir 0% den 43%, trung binh 7,5% (xem hinh 1) SCf 00 PHAN VUNS C^vjn