安家岭露天矿东排土场边坡稳定性分析

Slope stability analysis of east dump of Anjialing open-pit mine

安家岭露天煤矿东排土场位于西易井工矿采空区上方,并且排土标高增加导致出现平盘裂缝、应用数值模拟和极限平衡理论,分析了东排土场的变形破坏机理,评价东排土场边坡稳定。结果表明:DP3剖面不满足安全储备要求,存在滑坡隐患,新增标高排土是东排土场平盘出现新裂缝的一个主要因素,西易井工矿开采9#煤后采空区为东排土场不稳定的最主要因素;提出了停止排土,巡查以及布置监测线监测点实现实时监测提前预警的防治措施。

The paper aims at Anjialing open-pit coal mine is located above the goaf of xiyi mine,and the actual engineering situation of flat plate cracks caused by the increase of dump elevation,application of numerical simulation and limit equilibrium theory,deformation and failure mechanism of the east dump is analyzed,the slope stability of the east dump is evaluated.The study indicates that section DP3 does not meet safety reserve requirements,have danger of landslides;new elevation dump is one of the main factors causing new cracks in the flat plate of east dump,the goaf after mining 9 coal in Xiyi mine is the most important factor for the instability of the east dump.The preventive measures of stopping dumping,inspecting and arranging monitoring points of monitoring line to realize real-time monitoring and early warning are put forward.