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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.
In the mining area, there are few soil clay particles. Under the condition of secondary mining and random dumping, the soil quality of the landslide area can easily be loosened and the porosity of the soil body is increased. According to the engineering geology and working conditions of landslide slope, taking into account the fluid-solid coupling between the stress field and the seepage field, the finite element method is used to analyze the slope of landslide body in a mining area before and after rainfall Of the slope safety factor.The numerical analysis shows that under the condition of rainfall infiltration slope safety factor decreased significantly.