露天矿土-岩复合逆倾边坡空间形态优化

针对露天矿土-岩复合逆倾边坡到界边坡形态设计问题，结合达连河露天煤矿外排土场北帮-采场顶帮复合逆倾边坡的工程实际，基于刚体极限平衡与三维数值模拟的手段，研究了露天矿土-岩复合逆倾边坡的滑坡模式及稳定性规律，设计了最终边坡形态，确保北帮到界过程中煤炭资源回采的安全。研究结果表明：达连河露天煤外排土场北帮-采场顶帮复合逆倾边坡的滑坡模式为圆弧滑动；使外排土场北帮-采场顶帮复合逆倾边坡满足安全要求的采场边坡角为33°；露天矿土-岩复合逆倾边坡岩体的破坏形式为拉张-剪切复合型，岩体自重作用下的坡脚处应力集中造成的局部岩体破坏是整体边坡失稳的诱发因素。

Space Shape Optimization of the Soil-rock Composite Reverse Dip Slope in Open-pit Mine

In view of the shape design of the boundary slope of the soil-rock composite reverse dip slope in the open-pit mine,the landslide model and stability of soil rock composite reverse dip slope in Dalianhe Open-pit Coal Mine is studied by a-dopting the method of rigid body limit equilibrium and three-dimensional numerical simulation. The study is based on the engi-neering practice of the compound reverse dip slope of the north slope of outer dump and the top slope of the stope in Dalianhe open-pit coal mine,by which the safety of the mining of coal resources of the north to boundary slope is guaranteed. The study results show that for the compound reverse dip slope of the north slope of outer dump and the top slope of the stope in Dalianhe open-pit coal mine,the landslide model is circular sliding;in order to meet the safety requirements, the mining slope angle should be up to 33°;the failure form of rock mass is the composition of tension and shear. At the foot of slope,local rock mass destruction should be done due to the stress concentration caused by the rock mass weight and it is the inducing factor of the whole slope failure.