基于强度折减法的露采边坡稳定性分析

根据青海松树南沟矿区的勘察资料，建立了西南部高边坡剖面计算模型，利用强度折减法求解边坡的安全系数。采用FLAC3D计算得到了不同折减系数条件下的计算结果，确定了以塑性区分析为主，最大水平位移为辅的判断依据能够快速得到其安全系数。分析计算结果可知，青海松树南沟西南部边坡在天然状态下的安全系数为1.85。通过对比分析，矿山西南边坡内的断层对边坡稳定性有较大的影响，需要在开挖过程中重点监测。

Stability Analysis of Open Pit Mining Slope Based on the Shear Strength Reduction Method

According to the geological survey information of Songshunangou diggings in Qinghai province，the computation model of slope in southwest was built. The safety factor was solved by shear strength reduction method.The result under different reduction coefficient was obtained by using the FLAC3D. And the criterion with main plastic zone analysis and assisting by maximum horizontal displacement is determined to achieve the safety factor quickly. After analyzing the computation result，it concludes that the safety factor of southwestern slope is 1.85 under natural state. Through comparative analysis，the fault in southwest slope has a great influence on stability of mine slope，which must be majorly monitored during the mine excavation.