弓长岭露天矿顺倾断层影响边坡可靠性分析

弓长岭露天铁矿北帮边坡出现了沿顺倾断层大范围整体下滑的迹象,为避免灾难性事故的发生,进行了断层、节理的工程地质调查。考虑到边坡工程中客观存在的诸多不确定性因素,实验研究了岩石与断层泥强度的随机分布参数,运用Monte-Carlo法、Rosenblueth法对剖面1～3边坡的破坏概率进行计算,Monte Carlo法的破坏概率计算结果为0.153～0.969,Rosenblueth法的破坏概率计算结果为0.147～0.919,结果表明均已远远大于可接受破坏概率0.005,说明破坏风险极大,西部长约150m滑体必须立即采取治理措施以确保矿山的生产安全。

The Slope Reliability Analysis under the Influence of Conseqent Fault of Gongchangling Open Pit Mine

There is a sign of a large scope integral landslide along the consequent fault in the north slope of Gongchangling Open Pit Mine.To avoid any disastrous accident,the engineering geological investigation was carried out to study fault and joint.Considering many objective uncertain factors of slope engineering,the random distribution strength parameter of rock and fault gouge was tested.The slope failure probability was calculated with Monte-Carlo method and Rosenblueth method.The failure probability with Monte-Carlo method is 0.153 ~ 0.969 of section 1 ~ 3,and failure probability with Rosenblueth method is 0.147~0.919.The slope failure risk is great because it is far outweigh the acceptable failure probability 0.005.The western sliding body about 150 m long must be reinforced immediately to guarantee the mine production safety.