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为了对某露天矿进行相应的台阶边坡角设计和边坡稳定性分析。首先,利用简化Bishop法进行极限平衡法分析,结果表明:台阶开挖角为65°的情况下,安全系数为1.484,边坡稳定性和经济性达到较好组合。然后,利用FLAC3D,计算边坡在台阶开挖角65°情况下的安全系数和破坏模式,结果表明:开挖完毕后,边坡处于稳定状态,其潜在滑坡为局部破坏,安全系数为1.58,与极限平衡法得到的结果相差不大(相对误差6.47%),而极限平衡法计算偏于安全。
In order to carry out the corresponding step slope angle design and slope stability analysis for an open pit mine. First, the simplified Bishop method is used to analyze the limit equilibrium method. The results show that the safety factor is 1.484 when the excavation angle is 65 °, and the slope stability and economy are well combined. Then, using FLAC3D, the safety factor and failure mode of the slope under the condition of 65 ° excavation angle are calculated. The results show that the slope is in a stable state after excavation, and the potential landslide is partial failure with a safety factor of 1.58. The results obtained by the limit equilibrium method are not significantly different (relative error 6.47%), while the limit equilibrium method is biased toward safety.