考虑降雨入渗的某矿区滑坡数值模拟分析

摘要

According to the geographical characteristics and construction characteristics of the landslide slope,we adopt the finite element method to contrast and analyze the safety coefficients of the landslide slope in a mine before and after the rainfall,taking into consideration the fluid-solid coupling between the stress field and seepage field in the soil body.The numerical simulation results indicate that the safety coefficient of the landslide slope declines obviously when it is subjected to the rainfall infiltration.%矿区坡体土质粘粒较少,在二次翻采、随意堆弃工况下,极易造成滑坡区土质疏松、加大土体的孔隙率。根据矿区滑坡坡体的工程地质及工况特点,考虑土体内应力场与渗流场之间的流—固耦合作用,采用有限元法,对比分析了某矿区滑坡体的边坡在降雨前、后的边坡安全系数.数值分析表明,考虑降雨入渗的情况下边坡安全系数明显下降.