某建筑石料矿露天高陡边坡稳定性研究

Stability Study of Open-pit High Steep Slopes in a Building Stone Mine

露天矿山高陡边坡稳定问题一直是矿山生产面临的重大安全隐患,通过研究利用费辛柯法、格吉法、经验折减法、岩体内摩擦角换算法及H-B准则参数过渡方法,综合确定矿区边坡的岩土体物理力学参数。利用FLAC^(3D)强度折减法,从二维和三维2种角度对边坡稳定性进行了研究。研究结果表明:在自重+地下水+地震工况下,B区、C区以及D区边坡的安全系数小于许用安全系数,边坡处于不稳定性状态,有可能产生整体变形破坏,需优化边坡设计参数,为保障矿山安全生产提供了科学的依据。

The stability of high and steep slope in open-pit mine has always been a major safety hazard in mine production.The physical and mechanical parameters of rock and soil mass of mine slope are determined comprehensively by using Fesinko method,M.Georgi method,empirical reduction method,rock internal friction angle conversion method and H-B criterion parameter transition method.The stability of slope is studied from two and three dimensions by strength reduction method using FLAC^(3D).The research results show that:under the working condition of dead weight+groundwater+earthquake,the safety factor of slope in zone B,C and D is less than the allowable safety factor,and the slope is in an unstable state,which may cause overall deformation and failure.It is necessary to optimize the design parameters of slope,which provides a scientific basis for mine safety production.