布沼坝露天矿西帮边坡滑坡机制及综合治理研究

Landslide mechanism and comprehensive management in the western slope of Buzhaoba Open-pit Mine

为揭示西帮边坡滑坡机理和演化规律,综合治理矿山边坡滑坡,保障露天矿安全开采,以布沼坝露天矿西帮滑坡体为例,深入勘查布沼坝露天矿滑坡区域地质情况及滑坡信息,分析滑坡成因。采用原位实验及室内实验获取岩体力学参数,利用FLAC^(3D)软件对西帮自然状态及浸水条件下边坡应力、位移、滑坡模式及稳定性进行分析。结果表明,在天然状态下西帮现状边坡基本处于稳定状态,但在浸水条件下其整体稳定性降低,且部分区域处于不稳定状态。最后针对西帮不同区域提出了清方减载、抗滑桩支挡和地表水及地下水综合治理方案,边坡稳定性显著。

In order to reveal the landslide mechanism and evolution law of the western slope of Buzhaoba Open-pit Mine,a comprehensive treatment scheme of mine slope landslide is put forward to ensure the safe mining.The regional geological condition and landslide information of Buzhuba Open-Pit Mine was explored,and the cause of landslidewas analyzed.Mechanical parameters of rock mass were obtained by in-situ and laboratory experiments,and the stress,displacement,landslide mode and stability of the slope under natural state and flood condition were analyzed by FLAC^(3D)software.The results show that the present slope is basically stable under the natural condition,but the overall stability of the present slope is reduced under the flooding condition,and some areas are in the unstable state.At last,for different areas in the west of the slope,the plan of clearing square load reduction,anti-slide pile retaining and comprehensive treatment of surface water and groundwater were put forward,which greatly improved the stability of the slope.