高边坡稳定性案例分析及支护结构优化设计

Case Analysis on High Slope Stability and Optimization Design of Supporting Structure

根据碾子沟煤矿土质高边坡再次失稳的情况,结合现场勘察资料,对滑坡失稳原因进行了分析。运用ABAQUS有限元分析软件并采用抗剪强度折减系数法进行了数值计算,得出了土体在饱和状态下的安全系数及滑动面等参数,并分析了滑坡潜在的破坏过程。根据相关规范规定,运用折线滑动面及传递系数法隐式解的概念对滑体下滑力进行了计算,为优化设计提供依据。通过优化支护结构设计,减少了降雨对边坡的不利影响,遏制了滑坡变形。

According to a case of once again high soil slope instability in Nianzigou coal mine and combined with the field survey data, the analysis is carried out on the causes of landsliding instability. The numerical calculation is made by using ABAQUS finite element analysis software and the shear strength reduction coefficient method, the parameters of the safety factor and the sliding surface of the soil under the saturated state are obtained, and the potential damage process of the landslide is analyzed. Based on the relevant provisions of specifications, the landslide sliding force is calculated by using the concept of polyline sliding surface and implicit solution of transfer coefficient method to provide the basis for optimization. By optimizing the design of support structures, the adverse impact of rainfall on the slope is reduced and the slope deformation can be controlled.