宝日希勒露天矿端帮高位煤层靠帮回采技术研究  

End slope mining technology of top coal seam in Baorixile open-pit mine

作　　者：刘光伟[1] 张靖 白润才 李红毅 王强 LIU Guangwei;ZHANG Jing;BAI Runcai;LI Hongyi;WANG Qiang(School of Mines,Liaoning Technical University,Fuxin,Liaoning 123000,P.R.China;Liaoning University Mineral Resources Development and Utilization Technology and Equipment Research Institute,Fuxin,Liaoning 123000,P.R.China;Cathay Safety Technology Co.,Ltd.,Beijing 100101,P.R.China;Chifeng Disaster Prevention and Relief Center,Chifeng,Inner Mongolia 024000,P.R.China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁省高等学校矿产资源开发利用技术及装备研究院,辽宁阜新123000 [3]中安国泰(北京)科技发展有限公司,北京100101 [4]赤峰市防灾救灾中心,内蒙古赤峰024000

出　　处：《重庆大学学报》2023年第8期56-67,共12页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(51974144);辽宁省“揭榜挂帅”科技攻关专项资助项目(2021JH1/10400011);辽宁工程技术大学学科创新团队资助项目(LNTU20TD-07)。

摘　　要：现阶段近水平复合煤层露天矿端帮靠帮回采建设过程中,仍然存在局限,只是研究了下部煤层的回采,对于高位煤层的回采难度较大,研究较少,因此,为了能在近水平复合煤层中进行高位煤层的回采,通过分析宝日希勒露天矿边坡工程地质情况和地层赋存特点,利用FLAC^(3D)构建端帮三维数值模拟模型,计算了借助内排土场平盘靠帮回采高位煤层1-2煤时换填步距与边坡稳定性的关系,设计确定了靠帮回采高位煤层1-2煤边坡稳定性控制技术及相应的靠帮回采方案。研究结果表明:端帮1-2煤高位煤层靠帮回采换填步距不超过80 m,端帮1-2高位煤层靠帮回采时,借助于发展到1-2煤台阶底板上的内排土场平盘布置设备进行靠帮回采,回采方式为分层捣运、内排追踪回填。全区靠帮回采可多回收1-2煤2.260×10~7 t,取得49.72亿元的经济效益。At present,there are limitations in the mining and construction process of the end slope of nearhorizontal composite coal seam open-pit mines.Existing studies mainly focus on mining the lower coal seam,while mining the top coal seam is more difficult and has received less attention.Therefore,to address the mining of the top coal seam in the near-horizontal composite coal seams,this study analyzes the engineering geological conditions and strata occurrence characteristics of the Baorixile open-pit mine slope.A three-dimensional numerical simulation model of the end slope is constructed using FLAC~(3D),and the relationship between the filling step distance and the slope stability is calculated when mining the top coal seam 1-2 with the help of the inner dump plate.The slope stability control technology and corresponding mining scheme of 1-2 coal seam in top coal seam are determined.The research findings show that the replacement step distance of the top-level coal seam in the end-slope 1-2 coal seam should not exceed 80 m.When mining the top-level coal seam in the end-slope 1-2 coal seam,the equipment is arranged on the flat plate of the inner dump extended to the bottom plate of the 1-2 coal seam.The mining method involves layered tamping and inner row tracking backfilling.By employing end slope mining,the whole region can recover 2.260×10~7 t coal from the 1-2 seam,resulting in an income of 4.972 billion yuan.

关 键 词：露天矿 近水平复合煤层 高位煤层 靠帮回采 FLAC^(3D) 

分 类 号：TD824[矿业工程—煤矿开采]