某露天矿南端帮边坡稳定性分析及治理措施

Stability Analysis and Treatment Measures of Southern Side Slope of an Open-pit Coal Mine

以国内某露天煤矿为依托进行边坡稳定性研究,该矿自2015年至今已出现多次局部滑坡和片帮现象。采用边坡地质调查、工程地质钻探等方法,分析南端帮边坡工程地质与水文地质条件,查明岩土体空间分布状态、弱层分布情况及滑坡参数;通过现场测试与室内岩土物理力学性质试验,获得南端帮岩土物理力学性质参数,结合滑坡反分析方法,确定边坡稳定性评价指标;通过建立工程地质模型,利用极限平衡法分析南端帮边坡稳定情况,并提出边坡变形破坏综合治理措施。

Based on the study of slope stability in a domestic open-pit coal mine,the mine has experienced many local landslides and patches since 2015.In this paper,geological survey of slope,engineering geological drilling and other methods are used to analyze the engineering geological and hydrogeological conditions of the southern end slope,and to find out the spatial distribution of rock and soil,the distribution of weak layers and the parameters of landslides.Through field test and indoor geophysical and mechanical properties test,the physical and mechanical properties of the southern end of the rock are obtained,and the landslide back analysis method is used to determine the slope stability evaluation index.Through the establishment of engineering geological model,the limit equilibrium method is used to analyze the stability of the southern end slope,and the comprehensive treatment measures for slope deformation and failure are proposed.