胜利煤田东二号露天矿边坡稳定性分析.pdfVIP

摘 要 胜利煤田东二号露天矿边坡是大型高陡边坡，边坡上部有厚度较大的第四系土 层，下伏的白垩系基岩成岩作用较差，有发生滑坡等地质灾害的潜在威胁。本文在 研究了露天矿边坡的地质环境条件、岩土力学性质和边坡稳定性影响因素的基础 上，应用 FLAC 软件模拟研究了边坡在初始状态、强降雨及坡脚煤层开挖条件下的 坡体变形情况。研究认为：边坡开挖后的初始状态下，边坡表层的位移量最大，随 深度增加位移量减少；最高潜水位下，边坡变形量较初始状态增大，边坡处于不稳 定状态；坡脚煤层开挖条件下，坡脚处出现陡坡，坡体稳定性下降；提出疏干排水、 削坡和布置抗滑桩的治理措施，经过 FLAC 软件分析证明治理方案是可行的。研究 结果表明 FLAC 软件在分析边坡位移及其扩展方面有较强的适应性，应用前景广阔。 关键词：露天矿边坡；滑坡；FLAC ；应力状态；稳定性 - I - Abstract Shengli coalfield east-2 open-pit mine slope is the high and steep slope.There is big thickness quaternary soil layer on the upper slope,the underlying cretaceous bedrock has poor diagenesis.It has the potential threaten from landslide and other disaster.The thesis based on the research to the open-pit mine geologic environment,geotechnical mechanics properties and slope stability factors,it simulate s the slope distortion on initial state, rainfall condition and basalslope coal excavation condition. Research show that under the initial state after excavation of slope, the surface slope has the largest displacement which increases with the depth decrease ；on the highest groundwater level ，the side slope’s amount of deformity increases comparing with it under the initial state and the slope is at the non-steady state ；under the condition that the toe of slope coal bed excavates ，the toe of slope place presents the steep slope and the stability of the slope body becomes worse ；Proposed the governance measure which is the drainage by desiccation, truncating the slope and arranging anti-slide pile and through the analysis the governance plan is feasible 。The findings indicate that the FLAC software has the strong compatibility in the aspect which is analyzing the side slope displacement and the expansion ，the application pros