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针对倾斜煤层露天矿顶帮稳定性及空间形态问题,应用二维刚体极限平衡与三维FLAC3D数值模拟计算分析相结合的方法,对平庄西露天矿倾斜煤层顶帮边坡进行稳定性分析及空间形态优化.研究结果表明:平庄西露天矿滑坡模式为局部切层-顺层组合滑动且发生在A弱层的底界面;整体最终边坡角为25°,452水平标高以下局部边坡角可达到62°;倾斜煤层露天矿顶帮边坡随边坡倾角的增大,稳定性系数Fs呈线性减小规律;通过刚体极限平衡与三维数值模拟相结合的方法,能够准确分析潜在滑坡模式,提高倾斜煤层露天矿顶帮边坡倾角,确保边坡稳定安全,增大煤炭资源回采量.
Aiming at the problem of top-slope stability and space shape in inclined coal seam, the stability analysis of top slope of inclined coal seam in Pingzhuang West Open Pit is carried out with the combination of 2D rigid body limit equilibrium and 3D FLAC3D numerical simulation. The results show that the landslide mode of Pingzhuangxi open-pit mine is partial layer-bedding combination sliding and occurs at the bottom interface of weak layer A; the overall final slope angle is 25 ° and the local slope angle below 452 Which can reach 62 °. The slope of the top slope in the inclined coal seam open pit increases linearly with the increase of the slope inclination, and the stability coefficient Fs decreases linearly. By integrating the limit equilibrium of body with the three-dimensional numerical simulation, the potential landslide mode , Increase the inclination of top slope of open pit in inclined coal seam to ensure the stability and safety of slope and increase the recovery of coal resources.