露天煤矿不稳定工作帮边坡治理方案研究

Study on Treatment of Unstable Working Slope of Open-pit Mine

为避免魏家峁露天矿工作帮边坡持续变形导致更大范围的滑坡灾害,基于地质勘察及地表-地下联合监测手段,确定了潜在滑体的滑面形态,采用差分计算方法对滑面形态的合理性进行了论证,并分析了边坡的变形机理和破坏模式。综合考虑矿山开采现状及规划,采取滑体清方减载的方案进行滑坡治理,从台阶高度、平盘宽度两方面进行了边坡参数优化,并对设计边坡的稳定趋势进行了预测,结论表明工作帮边坡经治理后将处于稳定状态,研究成果对于指导后期采矿设计和同类型矿山滑坡治理具有指导意义。

In order to avoid the landslide caused by the continuous deformation of the unstable slope of the Weijiamao open-pit mine, based on the geological survey and the surface-underground joint monitoring, the shape of the sliding surface of the potential sliding body was determined. The rationality of sliding surface morphology is demonstrated by using differential calculation method, and the deformation mechanism and failure mode of the slope were analyzed. Considering the present situation and future planning of mining, it is finally determined that the slope treatment should be carried out by means of the plan of eliminating the load of the sliding body. From the aspects of single step height and width of flat plate, the optimal control design of slope parameters is carried out, and the stability characteristics of the slope after the treatment are predicted, and the rationality of the control scheme is verified.