基于水影响作用下的露天煤矿边坡稳定性研究

Study on slope stability in open-pit coal mine based on the influence of water

为研究边坡内水体对边坡稳定性的影响,通过将孔隙水压力作用和软岩遇水后强度弱化效果进行耦合分析,对露天煤矿边坡稳定性展开了综合研究;以FLAC3D作为分析软件,提出了一种新的水体单元耦合方法,将水体对边坡稳定性的影响机理进行比较全面的模拟分析;同时以伊敏露天煤矿东帮的最终采掘状态为例,使用FLAC3D对水体耦合过程进行了模拟。结果表明:x方向位移云图展现出了强降雨对东帮边坡位移特征的影响情况,边坡安全系数在降雨的影响下也出现了明显的降低。

In order to study the influence of water body on slope stability,through coupling the effect of pore pressure with the effect of strength weakening of soft rock after encountering water,the article comprehensively studies the slope stability of open-pit coal mine.Through the use of FLAC3D software,we present a new water element coupling method,comprehensively simulate and analyze the influence mechanism of water body on slope stability.Taking the final excavation state of the east slope of Yimin Open-pit Coal Mine as an example,the article simulates water coupling process by FLAC3D.The results show that the x-direction displacement nephogram reflects the influence of heavy rainfall on the displacement characteristics of the east slope,and the slope safety factor is also significantly reduced under the influence of rainfall.