平庄西露天煤矿顶帮“4·17”滑坡形成机制研究  

“4·17” Landslide Mechanism of Top Slope in Pingzhuang Western Surface Coal Mine

作　　者：陈凤阳 

机构地区：[1]国电平庄能源股份有限公司西露天煤矿,内蒙古赤峰024076

出　　处：《煤矿安全》2017年第9期73-76,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(U1361211;51474119;51104084)

摘　　要：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 guide the treatment work of＂4 · 17＂ landslide of top slope in Pingzhuang Western Surface Coal Mine effectively and realize the safety production, based on the engineering geological conditions in sliding area, the evolvement characteristics of horizontal and vertical displacement were studied by the analysis of the monitoring data and the displacement vectorization, then the position and the shape were obtained, the mechanic mechanism was revealed and the formation conditions and the predispos- ing factors were determined. It is shown that the formation mechanism of ＂4· 17＂ landslide is translational gliding mode, its failure mode is cutting-bedding and the sliding surface is composed of counter-tih weak layer A, a near-vertical back wall and the sheared arc, that the main factors causing the landslide include boundary effect of the weak layer, the supporting role of the diabase, the damage of the integrity of the rock mass, unloading effort caused by surface mining and the plan form, in which, the predisposing factor is the unloading effort caused by surface mining.

关 键 词：推动式滑坡 破坏模式 岩体位移监测 滑坡机制 位移矢量 

分 类 号：TD824.7[矿业工程—煤矿开采]