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Study on Stress Change and Stability of Dump Slope Under Rainfall
Author(s): 
Pages: 262-265
Year: Issue:  8
Journal: Safety in Coal Mines

Keyword:  降雨类型孔隙水压耦合分析边坡安全系数位移变化露天矿排土场;
Abstract: 为分析不同降雨类型对露天矿排土场边坡稳定性的影响,以历时72 h的不同降雨类型为加载条件对排土场边坡进行seep-sigma-slope耦合分析.结果表明:边坡坡体内负的孔隙水压在降雨8~14 h内逐渐降低,在雨水入渗稳定后逐渐趋于一个稳定值;初期降雨强度大小对边坡稳定性的影响较大,其中雨型A作用下边坡最终安全系数最低为1.422,降低率达11.24%;排土场边坡x、y方向位移在降雨初期增加最快,之后增速渐缓.
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