露天采场邻近边坡下空区群稳定性分析及其治理

Stability Analysis and Treatment of Empty Area Group Near Slope of Open-pit Stope

为研究朝凯煤业南部空区对上部边坡的影响,利用Ansys进行数值计算,采用强度折减法得到边坡安全系数和相应破坏类型,提出“采空区顶板崩落+坡脚位移监测”综合治理方案。研究结果表明:治理前部分空区存在局部应力集中,采用综合治理方案后2^(#)煤层和边坡坡角拉应力分布范围和拉应力值减小,12个月后边坡位移量趋于稳定。

In order to study the in?uence of the south empty area of Chaokai Coal Industry on the upper slope,the numerical calculation is carried out by Ansys,the slope safety factor and corresponding failure type are obtained by strength reduction method,and the comprehensive treatment scheme of"goaf area roof caving+slope foot displacement monitoring"is put forward.The research results show that there is local stress concentration in some empty areas before treatment.After adopting the comprehensive treatment scheme,the distribution range and value of tensile stress at the angle of the 2^(#)coal seam and slope decrease,and the displacement of slope tends to be stable after12 months.