论文部分内容阅读
为有效指导平庄西露天煤矿顶帮“4·17”滑坡治理工作,实现安全生产,在分析滑坡区工程地质条件的基础上,通过系统分析岩体位移监测数据并将其矢量化,研究了滑坡区域内岩体水平及垂直位移的演变规律,判定了滑面的位置与形态,揭示了滑坡形成的力学机制并明确其形成条件与诱因。结果表明:“4·17”滑坡的力学成因机制类型为推动式,破坏模式为切层-顺层滑动;滑面由逆倾的A号弱层、近乎垂直的滑坡后壁及中间的剪切圆弧组成;造成滑坡的主要原因有弱层的边界效应、辉绿岩的支承作用、地下开采对岩体完整性的破坏效应、露天开挖卸荷效应及平面形态效应,其中露天开挖卸荷是本次滑坡发生的诱发因素。
In order to effectively guide the landslide control work of “4 · 17” at the top of Pingzhuang West Open-pit Coal Mine to realize safe production, based on the analysis of engineering geological conditions in landslide area, by systematically analyzing and quantifying the monitoring data of rock mass displacement, The evolution law of horizontal and vertical displacement of rock mass in landslide area is studied. The position and form of slip surface are determined. The mechanics mechanism of landslide formation is revealed and its formation conditions and causes are clarified. The results show that the type of mechanical genesis of “4 · 17” landslide is push type and the failure mode is layer-by-layer sliding. The slip surface is composed of inverted weak A-layer, near vertical landslide back wall and middle Shearing circular arc. The main causes of landslide are the boundary effect of weak layer, the supporting effect of diabase, the destructive effect of underground mining on the integrity of rock mass, the unloading effect of open-pit excavation and the effect of plane shape, of which open-air Excavation unloading is the trigger of this landslide.