胜利东二号露天煤矿采场南帮局部边坡变形治理

Deformation control of local slope in the south slope of stope in Shengli East No. 2 Open-pit Coal Mine

针对胜利东二号露天煤矿南帮滑坡区西侧边坡出现双台阶变形的不良地质问题,对变形区边坡稳定性进行了定性分析;选取典型剖面位置,建立二维边坡模型,运用离散元数值模拟确定其潜在滑坡模式;基于刚体极限平衡法,进行边坡稳定性计算并针对性地提出削坡整形治理方案。结果表明:变形区破坏模式为圆弧滑动,治理前边坡稳定性系数为0.993;采用削坡方案治理后,边坡稳定性系数为1.102,局部边坡角减缓至18°,满足安全储备系数要求。

In response to the problem of double-step deformation on the west slope of the south slope landslide area of Shengli East No.2 Open-pit Mine,the article qualitatively analyzes the slope stability,selectes the typical section and establishes two-dimensional slope model.The article determines potential landslide mode using discrete element numerical simulation,calculates the slope stability based on the rigid body limit equilibrium method,and accordingly proposes a slope trimming and reshaping treatment scheme.The results show that the deformation zone's failure mode is circular sliding.The slope stability coefficient before treatment is 0.993,and it is 1.102 after the slope trimming and reshaping treatment.The local slope angle is reduced to 18°,meeting the safety reserve coefficient requirements.