布沼坝露天矿西帮边坡岩体应力场演变规律分析

针对上部为自然山体边坡、下部为软岩人工开挖边坡的复合高大边坡的变形机制进行数值模拟研究。根据模拟结果,由于下部软岩边坡开挖诱发上部自然山坡体变形开裂、向下滑移和破坏,再加上特殊地质构造的作用,增大向下滑移推力的作用,由此进一步加快下部人工边坡变形速率,而下部坡体的大变形又反过来加速上部自然山体的破坏,从而构成了复合型破坏机制,因此开采设计中如何控制边坡变形是后续开采需要解决的问题。

Analysis of Stress Field Changing Law For West Slope On BUZHAOBA Open Pit Mine

This paper aimed at that numerical study is carried out for mechanism for upper hill slope and lower excavation slope.As lower soft slope excavation induces upper hill slope deformation,sliding and failure。 Moreover,pull force increases as special geological structure effect.Therein,deformation rate for lower slope is increased.Combined failure mode is composited as upper hill slope failure is increased as lower slope failure.Therefore,controlling slope deformation is to solve problem for continuing excavation.