银山矿边坡滑坡类型分析及边坡角优化

Analysis of Slope Sliding Type and the Slope Angle Optimization in Yinshan Mine

以银山矿为工程背景,通过现场区域地质情况及滑坡类型的调查,根据边坡失稳的力学理论,分析了银山矿高陡边坡滑坡模式及其失稳破坏原因。在此基础上,利用强度折减方法,借助三维数值计算软件,同时考虑水渗透作用,分别对各个坡面的整体稳定性进行了对比分析。结果表明,银山矿的北东边坡中的剖面1、剖面2和剖面8经过优化后能达到的最优边坡角分别为44°、46°和45°,西北边坡中的剖面3和剖面4经过优化后能达到的最优边坡角分别为45°和48°,西边坡中的剖面5和剖面6经过优化后能达到的最优边坡角分别为46°和44°,南边坡中的剖面7经过优化后能达到的最优边坡角为44°。对矿山整体设计45°的边坡角进行了整体系统的优化,通过本次边坡角的优化对矿山整体边坡的稳定性具有一定的实际意义,同时能为矿山的安全生产提供一定指导。

With Yinshan mine as engineering background,and based on the field investigation of regional geology and the slope sliding type,the sliding mode of high steep slope in Yinshan Mine and the factors for destabilization were analyzed according to the theory of mechanics for slope sliding.Based on this,the integrated stability of each slope were contrasted and analyzed by strength reduction method and FLAC3 Dnumerical method,meanwhile considering the water permeation.The results showed that：the optimal slope angle at section 1,section 2 and section 8 of North-East slope can reach 44°,46°and 45° respectively after optimization.The optimal slope angle at section 3 and section 4 of North-West slope reach 45°and 48°.The optimal slope angle at section5 and section 6 of Western slope is 46°and 44°,and the optimal slope angle at section 7 of southern slope is 44°.The mine design with slope angle of 45° is wholly optimized,which has practical significance on keeping slope stability.Meanwhile,the research provides guidance to safety production of Yinshan mine.