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针对自然界中的层状岩质滑坡绝大部分呈现出明显的三维形态特征,在倾倒破坏极限平衡二维推导分析方法的基础上,考虑层状岩质斜坡的三维受力状态,进行三维力系的简化与等效,提出了考虑三维受力的倾倒分析方法,在考虑真倾角方向的倾倒极限平衡分析中,将层状岩质滑坡近似为悬臂梁处理。并以重庆鸡冠岭滑坡为例进行验证分析。计算结果表明:1自然状态下,鸡冠岭斜坡处于稳定状态;2地下采空状态下,鸡冠岭煤层上覆岩层逐层发生倾倒破坏,并挤压下伏阻滑关键块体,导致关键块体剪出破坏后形成滑坡。该分析结果与实际情况基本一致。
For the most part, the stratified rock landslides in nature show obvious three-dimensional morphological characteristics. Based on the two-dimensional derivation analysis method of the limit of collapse and collapse, considering the three-dimensional stress state of stratiform rock slopes, The simplification and equivalent of the method are proposed. The method of dumping considering three-dimensional force is proposed. In the analysis of dumping limit equilibrium considering the true dip angle, the stratified rock mass is approximated as a cantilever beam. A case study of Jiguanshan landslide in Chongqing is carried out. The calculated results show that: 1, under the natural condition, the JGG slope is in steady state; under the condition of underground mined-out, the overlying strata of Jiguanling coal seam collapse and collapse, Cut out the damage after the formation of landslides. The result of this analysis is basically the same as the actual situation.