贵州垄脊地貌下置换条带煤柱开采研究  

Numerical simulation of coal pillar mining in replacement strips under monopoly ridge terrain in Guizhou

作　　者：高方玲 刘萍[1] 贾毅超 陈镇 罗畅 黄鑫康 GAO Fangling;LIU Ping;JIA Yichao;CHEN Zhen;LUO Chang;HUANG Xinkang(Mining College,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025

出　　处：《煤炭工程》2023年第3期12-18,共7页Coal Engineering

基　　金：贵州省科技计划资助项目(黔科合基础[2020]1Z047)。

摘　　要：贵州矿区生态环境脆弱,且地形地貌较为复杂,大多属低、中山垄脊地貌,以此典型地质条件下的攀枝花煤矿11071工作面为研究背景,采用置换条带煤柱开采,一种“采-留-充”结合的减损开采方法,该方法提高了煤炭资源的回收率,降低了采煤对矿区环境和地表的影响,具有重要的应用价值。通过理论分析与计算确定了保留煤柱宽度a不小于20 m,条带开采宽度b为25~35 m,采用数值模拟方法研究了3种条带开采方案的地表变形特征,综合优选“采-留”方案,后针对优选方案充填置换煤柱进行再次模拟分析上覆岩层移动规律,置换煤柱比例为25%、50%、75%,研究了不同置换率充填对上覆岩层移动的影响,根据上覆岩层的条件合理确定置换率,可最大限度地提高资源回收率。研究结果表明:方案“采35 m留30 m,置换率25%~50%”最为合理,地表二次变形不明显,地表变形符合建筑物损毁等级Ⅰ级标准。In the mining area of Guizhou,the ecological environment is fragile,and the topography is complex,most of them are low and medium mountain monopoly ridges.The 11071 working face of Panzhihua Coal Mine in this typical geological condition is taken as the background,coal pillar mining in replacement strips,a mining-retaining-filling mining method,is used,which has important application value as it improves the recovery rate of coal resources and reduces the impact of coal mining on the environment and surface of the mine area.Through theoretical analysis and calculation,the width of retained coal pillar a is not less than 20 m,and the strip mining width b is 25~35 m,and the surface deformation characteristics of three strip mining solutions are studied by numerical simulation,and the mining-retaining solution is integrated and preferred.The effect of different replacement rates on the movement of the overlying rocks is studied,and the replacement rates are determined reasonably according to the conditions of the overlying rocks to maximize the resource recovery rate.The results show that the solution of“mining 35m and retaining 30m,replacement rate 25%~50%”is the most reasonable,the secondary deformation of the ground surface is not obvious,and the ground surface deformation is in line with the standard of building damage levelⅠ.

关 键 词：垄脊地貌 置换条带 煤柱开采 上覆岩层 运移规律 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]