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针对尖山磷矿开采实际情况,利用ANSYS有限元分析软件建立了考虑重力载荷作用的高边坡体稳定性分析数值模型,运用强度折减法折减边坡岩体的黏聚力和内摩擦角,根据计算结果分析尖山磷矿东采区高边坡在重力作用下的稳定情况。结果表明:当折减系数由1.33增加到1.34时,高边坡体的位移、塑性应变发生突变,通过边坡失稳的主要判据判定目前尖山磷矿东采区高边坡的安全系数为1.33,边坡稳定。
According to the actual situation of Jianshan phosphate rock mining, the numerical model for stability analysis of high slope subjected to gravity load is established by ANSYS finite element analysis software. The strength reduction method is used to reduce the cohesion and internal friction angle of rock mass. According to the calculation results, the stability of high slope in the east mining area of Jianshan phosphate rock under gravity is analyzed. The results show that when the reduction coefficient increases from 1.33 to 1.34, the displacement and plastic strain of high slope body change suddenly. The main criterion of slope instability determines that the safety factor of the high slope in the east mining area of Jianshan phosphate rock is 1.33, slope stability.