露天煤矿含断层顺倾边坡渗流与稳定性分析

Analysis of seepage and stability of down dip slopes in open-pit coal mines containing faults

采用极限平衡法与数值模拟相结合的手段,以西南某露天矿含断层顺倾边坡为背景,模拟分析了在渗流条件下边坡的孔隙水压力与渗流场变化,对边坡稳定性变化进行探讨。研究表明:降雨入渗改变了边坡的孔隙水压力,弱化了岩土体的物理力学性质,改变了渗流场的分布,导致边坡稳定性降低;断层加快了雨水的入渗速度进而影响滑坡位置。

This article adopts the limit equilibrium method combined with numerical simulation.Taking a fault-bearing down-slope of an open pit mine in southwest China as a background,the article simulates and analyzes the changes of pore water pressure and seepage field of slope under seepage conditions,and explores the changes of slope stability.The study shows that the infiltration of rainfall changes the pore water pressure of the slope,weakens the physical and mechanical properties of the geotechnical body and changes the distribution of the seepage field,leading to a decrease in slope stability.The fault accelerates the infiltration rate of rainwater and thus affects the location of the landslide.