基于数值模拟的露天边坡稳定性分析

Analysis on the Slope Stability of Open-pit Mine Based on Numerical Simulation

为系统分析塔罗金矿露天边坡稳定性状况,选取具有代表性的现状边坡剖面,运用极限平衡法和强度折减法分别进行计算,得出剖面的平均安全系数为1.458;建立剖面的三维模型,运用有限差分软件分析边坡的塑性区和位移场变化,结果显示边坡的塑性区主要分布于各台阶的坡面位置,塑性区面积较小,未贯穿坡体,也未产生潜在滑移面;布置在边坡典型位置的监测点位移量较小,边坡产生整体滑移的可能性不大。安全系数和数值模拟计算结果与现场实际观测情况一致。

In order to systematically analyze the slope stability of Taluo gold mine, a representative cross section of slope was selected. Calculated by limit equilibrium method and strength reduction method, the average safety factor of cross section was 1.458. Then, the three-dimensional model was established and the finite difference software was used to an- alyze the changes for plastic zone and displacement field of the slope. The results showed that plastic zone mainly dis- tributed in the slope position of each step, and plastic zone was small in size, neither breaking through the slope, nor creating the potential slip surface. The monitoring points decorating on typical slope position presented small displace- ment, which indicated that it was unlikely to create overall slippage of slope. The calculated safety factor and numericalsimulation results were consistent with the actual situation observation.