中文摘要：

以某露天矿边坡为研究对象,结合矿区的水文工程地质条件,借助有限元计算软件Midas/GTS,在两种不同的降雨条件开展了多个工况下的露天矿边坡稳定性研究分析。结果表明：在强降雨条件下,由于降雨强度远大于土体的渗透能力,短时间内边坡浅层土体含水量会迅速增加,会形成暂态饱和区,因此对深部土体影响较小,对边坡的稳定性和安全系数影响较小;连阴雨条件下,当降雨强度小于土体的渗透能力时,雨水能够充分渗入到边坡土体中,对边坡稳定性产生不利影响。通过绘制曲线图可知渗透系数的增大开始阶段安全系数按斜率较大的线性函数发生变化,随后安全系数递减速率逐渐降低,当饱和透系数达到一定程度后,安全系数变化不明显。

英文摘要：

With an open pit mine slope as the study object,in combination with the hydrological and geological conditions of the mine area,with the aid of the finite element software Midas / GTS,the study and analysis on slope stability of open pit mine in several working conditions under two different kinds of precipitation conditions were carried out. The results show that,under the strong precipitation condition,as the precipitation intensity is far higher than the infiltration capacity of soil mass,the water content of the shallow layer soil mass of the slope will increase rapidly in short time and the transient saturated zone is formed,which has little effect on the deep soil mass and the slope stability and safety coefficient. Under the continuous rain condition,when the precipitation intensity is lower than the infiltration capacity of soil mass,the rain water can fully infiltrate soil mass of the slope,which has adverse effect on the slope stability. By plotting the curve graph,we can know that at the initial increasing stage of infiltration coefficient,the safety coefficient varies with the linear function of high gradient,and then the decreasing rate of the safety coefficient reduces gradually,when the saturated permeability coefficient reaches a certain degree,the safety coefficient variation is not obvious.