甲基卡锂辉石矿露天边坡稳定性研究

针对康定甲基卡锂辉石矿东南西北4个方位形成的高度不等的露天边坡的安全稳定问题，在开展现场工程地质调查、对边坡工程地质进行岩组划分、分区和对各个分区的破坏模式进行总结的基础上，采用极限平衡分析方法、二维有限元数值模拟分析以及强度折减法对设计情况下露天边坡稳定性进行分析。通过对2个分析剖面、3个边坡稳定性分区在3种工况下边坡稳定性的极限平衡分析得出，边坡整体安全系数均大于许用安全系数1.20、1.15和1.10，并运用二维有限元数值模拟分析得出，强度折减法计算的安全系数与极限平衡分析法的结果相近，边坡的滑动模式与极限平衡分析采用的边坡滑动模式一致，证明极限平衡分析的结果具有可靠性。最后得出在现有设计情况下甲基卡锂辉石矿露天采场最终境界边坡整体是稳定的，现有台阶坡角较为合理。

Study on Stability of Open pit Slope of Jiajika Spodumene Mine#br#

The stability of four open pit slopes with different heights in Kangding Jiajika Spodumene Mine was studied.On the basis of conducting on site geological surveys,dividing the slope geology into rock groups and summarizing the failure modes of each zone,limit equilibrium method,two dimensional finite element numerical simulation analysis and strength reduction method are used to analyze the stability of the design slope of the open pit mine.Under three working conditions,the limit equilibrium analysis method is used to analyze the stability of two sections and three slope stability zones,and it is found that the stability meets the allowable safety factor.Using the two dimensional finite element numerical simulation method,it is found that the safety factor calculated by the strength reduction method is similar to the result of the limit equilibrium analysis method,and the obtained slope slip mode is also consistent,which proves that the result of the limit equilibrium analysis is reliable.The final boundary slope of the open pit of Jiajika Spodumene Mine under design is overall stable,and the step slope angle is reasonable.