安家岭矿端帮煤开采边坡稳定性分析与控制  

Analysis and control of slope stability of end wall coal mining in Anjialing Open-pit Mine

作　　者：侯成恒 HOU Chengheng(China Coal,Technology and Engi.neering Group Shenyang Research Institute Co.,Ltd.,Fushun 113122,China;State Key Lohoratory of Coal,Mine Safety Technology,Fushun 113122,China)

机构地区：[1]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [2]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2022年第7期235-240,共6页Safety in Coal Mines

基　　金：中国煤炭科工集团有限公司科技创新创业资金专项重点资助项目(2019-ZD004);国家重点研发计划资助项目(2017YFC1503106)。

摘　　要：为解决安家岭露天矿端帮到界边坡压煤问题,结合安家岭露天矿北帮到界边坡实际情况,运用极限平衡方法,对回采高度、整体边坡角与边坡稳定之间敏感性分析,采用三维数值模拟方法研究横采内排追踪距离、内排压脚高度与边坡稳定性关系。结果表明:回采高度由1276m水平降至1264 m水平、整体边坡角由34°提高至35°时,边坡稳定系数变化最为敏感,综合分析确定端帮压煤回采方案为回采高度1264 m水平、整体边坡角35°;横采内排追踪距离为30m、横采内排压脚高度24 m,可实现煤炭资源安全高效回收,同时具有较高社会效益。In order to solve the coal pressing problem of the end-to-boundary slope of Anjialing Open-pit Mine,combined with the actual situation of the north slope to the boundary of Anjialing Open-pit Mine,the sensitivity between the mining height,the overall slope angle and the slope stability is analyzed by using the limit equilibrium method,and the relationship between the horizontal mining internal discharge tracking distance,the internal discharge presser foot height and the slope stability is studied by using the three-dimensional numerical simulation method.The results show that,the mining height is reduced from 1276 to 1264,the overall slope angle is increased from 34°to 35°,and the slope stability coefficient is the most sensitive.Through comprehensive analysis,it is determined that the stoping height is 1264 m level and the overall slope angle is 35°for the stoping scheme of end-side pressing coal;the tracking distance of inner drainage in horizontal mining is 30 m,the height of inner drainage presser foot in horizontal mining is 24 m,which can realize the safe and efficient recovery of coal resources,and it has higher social benefits.

关 键 词：端帮煤开采 边坡稳定 敏感性分析 控制方案 横采内排 

分 类 号：TD824.7[矿业工程—煤矿开采]