Nghiên cứu đề xuất áp dụng các giải pháp tận thu trụ than bảo vệ lò dọc vỉa trong điều kiện vỉa than dày trung bình, dốc thoải đến nghiên tại một số mỏ vùng quảng ninh

Thong tin khoa hoc cong nghe m o ^ NGHIEN ClJfU DE XUAT AP DUNG CAC GIAI PHAP KHAI THAC TAN THU tru than bao ve 16 dgc via flieu hien via than day trung falnh, doc thoai den nghleng tai mgt so mo vung Quang Ninh According to the calculation, the recovery of the coal from the coal nbs will provide 71% of total coal reserves at the coal ribs of the roadways This result will be used as a basis for applying the solutions for recovering the coal ribs at the roadways under the conditions of medium coal seams with the gentle slope to inclined angle at some coa! mines in Quang Nmh area, meeting the aim of recovering natural resources and ensuring the safety in the coal mining process Theo kit qua danh gia ting hp'p tri> lup'ng tgi mpt so md than ham Id viJng Quang Ninh nhu Ming Thai, Nam M l u , Duang Huy va Quang Hanh cho thiy, tru* lup'ng than cac tru bao ve Id dgc via van tai giir lai de lam Id dpc via thdng gid cho phan tang dudi chiem khoang 10 ^ 15% ting trir lup'ng cac khu vue vfa day trung binh die thoai din nghleng huy dpng vao khai thac Vdi trCr lugng than Idn se phai d l Igi iam trg bao vg cac dudng Id dgc vfa nhu tren, nlu khdng khai thac tan thu se gay ton that tai nguyen khdng t h i tai tgo Do dd, vigc nghien ciru de xuat ap dgng eae gial phap khai thac cac trg than bao vg Id dgc via dieu kign cac via than day trung binh, doc thoai din nghleng viing Quang Ninh la h i t sire can thiet Tren ca sd eae tai li^u dia chat, quy hoach khai thac him Id, k l hoaeh khai thac 2014 va ban cgp nh|t hign trgng khai thae mdt so mo d|c trung nhu Nam M l u , Hdng Thai, Quang Hanh, Duong Huy va danh gia tong hop trCr lup'ng than cac try bao vg thugc khu vyc via day trung binh doe thoai d i n nghleng tai eae TS, LeBifCVINH KS PHAM K H A N H M I N H ThS PJ-iClNG VIET BAC Vi$n Khoa hgc Cong nghe Mo - Vinacomin Bien t$p: TS Trwcmg OiJc Dw md tren, cho thiy: tong tru- lug'ng than cae tai bao ve khoang 21.084 nghin tan, dd md Nam Mlu chiem 11,7%, md Hing Thai chiem 2,3%, md Quang Hanh chiem 34% va md Duong Huy chiem 52,1%, (bang 1) D I khai thac tgn thu phan tru lup'ng than cac try bao ve nhu tren, mot so nudc tren the gidi nhu CH Sec, Slovakia, My, Dire, Australia, Nga, v.v thudng ap dung khai thae phan than eua trg bao vg bang vigc keo dai id chg cua phan tang dudi hoac khai thac trg bao vg Id dpc via bang may khoan dudng kinh Idn Cg the nhu sau: * Doi voi giai phap khai thac tru bao ve Id dgc via thong gio bang viec keo dai 16 chry phan tang duvi: Tiiy theo dieu kien dja chat ky thuat md tai khu vuc tru bao vg, cdng tac tac chuan bj de khai thac phan tru' lugng trg than bao ve Id dgc via thdng gid cd t h i thuc hien theo hinh thirc keo dai guong Id chg ting dudi len khai thac ca phan trg bao vg Guong 16 eho dang cut (khdng cd Id dgc vfa thdng gid cho doan Id chg tru bao Bing fru' Iwong than tru bao v? (ny tan) TT Ten mo a Slfia