露天煤矿顺层边坡变形失稳控制对策研究与实践

摘要

顺倾岩层作为影响边坡稳定的重要因素之一,长期困扰着露天矿安全生产,当边坡内部赋存有软弱岩层时,边坡稳定问题将更加突出.以平朔矿区安太堡露天矿南帮边坡变形失稳控制工程为例,采用数值分析、极限平衡分析与变形监测相结合的方法,针对含弱层顺层边坡的变形失稳破坏模式及内排压脚治理措施的可行性进行了研究,并进行了工程适用性验证分析.研究与实践结果表明,内排压脚措施成本低、见效快,对于控制露天矿边坡稳定具有明显的适用性.%Down-dip strata is one of the important factors that influence slope stability,which has long troubled the safe production of surface coal mine.When there are weak rock formations in the slope,slope stability will be more serious.Taking the deformation and instability control project of the south side slope of Antaibao Surface Coal Mine in Pingshuo Mining Area as an example,the methods of numerical analysis,limit equilibrium analysis and deformation monitoring are adopted in this paper,and the feasibility of deformation failure mode and the control measure of internal dumping and presser foot for bedding slope containing weak strata is studied,and the engineering applicability verification analysis is carried out.The results of research and practice show that the internal dumping and presser foot method has the characteristics of low cost and quick effect,which has obvious applicability to control the slope stability of surface coal mine.