不同采高下S形滑面对边坡的影响

Effect of S- shaped Sliding Surface on Slope Stability Under Different Mining Height

为了研究顺坡下行开采对边坡稳定性的影响,基于开采沉陷理论,采用UDEC数值软件研究采动对滑面的影响,并利用变滑面试验台模拟不同采高(0.8、1.2、1.8、2.4 m)下滑面变形对坡体稳定性的影响。结果表明:顺坡下行开采使上部滑面成S型挠曲,坡体出现不同程度的裂缝;且随着开采高度的增加,滑面挠曲程度增大,坡体内部裂缝加宽,坡体整体稳定性急剧降低。

In order to study the influence of downward mining along the slope on the slope stability,based on the mining subsidence theory in this paper,the effect of mining on the sliding surface was analyzed by using UDEC numerical simulation software. The influence of the deformation of the sliding surface on slope stability under different mining height（ including 0. 8 m,1. 2 m,1. 8 m,2. 4m,respectively） was simulated by utilizing the test bed with a variable sliding surface. The results show that downward mining along the slope makes the upper sliding surface occur an S- shaped deflection. Cracks of different degrees will appear in the slope body. And with the increase of mining height,the deflection degree of sliding surface increases; cracks in the slope body are widened,and the whole stability of slope body reduces drastically.