露天矿裂隙岩体边坡离散单元法模拟分析

离散单元法能够分析节理裂隙岩体沿离散界面产生滑移、张裂、垮落等大变形问题,是岩石开挖工程中分析非连续介质问题的重要方法。徐东沟露天矿最终境界边坡上下部均由坚硬块状结构岩体组成,而边坡中部则为岩性较软的绿泥石英片岩构成,且为典型的顺坡向层状结构,分析表明,绿泥石英片岩构成的局部边坡区域位移较大,模拟开采至最终-348m水平时,水平位移最大达1.6m,垂直向下位移达1.4m,应用强度折减法得到边坡安全系数仅为1.05,开采出露后极有可能产生边坡失稳,影响矿山的安全生产。

Simulation analysis of D discrete element method for simulation analysis of jointed rock mass slope in open pit mine

The discrete element method can analyze the large deformation problems of joint fracture rock mass along the discrete interface such as sliding, tensile crack and caving, which is an important method to analyze discontinuous medium problems in rock excavation engineering. Xudonggou mine slope top and bottom are composed of rigid block structure of rock mass, center for lithology and slope of soft chlorite quartz schist, and layered structure for the typical slope. Analysis showed that the chlorite quartz schist in the composition of local displacement of slope area was larger, at the condition of simulation mining to end -348 m level mining depth, the biggest horizontal displacement was1.6 m, biggest, vertical downward displacement reached1.4 m, the slope safety factor was only 1.05 by application strength subtraction. Therefore, after mining, it is very likely to cause slope instability and affect the safe production of the mine.