坡脚扰动对工作帮整体稳定性的影响

Effect of Toe of Slope Disturbance on Global Stability of Working Slope

以安太堡露天矿工作帮边坡为工程背景,以数值模拟软件FLAC3D为研究手段,对受到多次坡脚扰动作用下露天矿工作帮边坡稳定性的演化规律进行了数值模拟研究。研究结果表明:受到坡脚扰动作用时,露天边坡体内的X、Z 2个方向上的压应力均呈减小趋势,在X方向上出现局部的拉应力区;均匀坡脚扰动对露天边坡体产生的影响作用呈现非线性特性;露天边坡体内的X方向上的应变均呈拉伸特性,且随着扰动作用的增加呈增加趋势;Z方向将以压应变为主,仅在坡脚局部出现拉应变区域;边坡体受到来自坡脚的扰动后发生滑移破坏的部位极可能在坡脚位置的呈拉伸状态区域附近。

Take the working slope of Antaibao open-pit mine as an engineering background,the evolution law of global stability of surface mine working slope affected by toe of slope disturbance is simulated by FLAC3D.The results show that compressive stress of surface mine working slope after affected by toe of slope disturbance is showed gradually decreased on direction of X and Z,and tension stress zone appeared in local zone on direction of X;the effect of uniform toe of slope disturbance on global stability of working slope is showed nonlinear;the property of tensile strain is showed on direction of X in surface mine working slope,and tensile strain will increase as the increase of toe of slope disturbance;compressive strain is mainly on direction of Z,but tensile strain will appear in local zone of toe of slope on direction of Z,too.Slip deformation is most easily to occur in the tensile strain area of toe of slope.