碟子沟风井边坡变形破坏机制及稳定性分析

Deformation and failure mechanism and stability analysis of slope of Diezigou shaft

为了掌握王家岭煤矿碟子沟风井工业场地内各边坡的变形破坏机制,对边坡稳定性进行分析评价;以现场补充勘察数据结果为基础,运用FLAC3D数值模拟软件研究了场区东侧古滑坡体、西侧古滑坡体以及北侧矸石回填边坡的变形破坏机制;通过Geo-slope软件分析了场区内典型边坡的稳定性。结果表明:东侧古滑坡体边坡滑动模式为沿基底岩层滑动;西侧古滑坡体未形成整体滑动变形趋势,在边坡内部存在黄土层内部滑动趋势;北侧矸石回填边坡在现状与预测条件下均未形成整体滑动变形趋势。碟子沟风井工业场地内的各边坡在现状条件下的安全系数在1.103~3.279之间,稳定性较好,局部存在软弱区域,整体稳定性能够满足安全储备要求。

In order to grasp the deformation and failure mechanism of different slopes in Diezigou ventilation shaft industrial site of Wangjialing Coal Mine,the article analyzes and evaluates the stability of the slopes,uses FLAC3 Dnumerical simulation software to study the deformation and failure mechanism of the ancient landslide body on the east side of the site,the ancient landslide body on the west side and the gangue backfill slope on the north side of the site,and analyzes the stability of the typical slope in the site by Geo-slope software.The research results show that the main deformation of the slope in the industrial site of Diezigou ventilation shaft is the displacement deformation caused by stress release caused by stripping and excavation activities,and no obvious sliding is formed in each slope.There is no overall sliding deformation trend of the ancient landslide in the west,but there is a sliding trend of the loess layer in the slope.Under the present situation and the predicted condition,the gangue backfill slope on the north side does not form the overall sliding deformation trend.The safety factor of each slope in the industrial site of Diezigou ventilation shaft is between 1.103 to 3.279 under the current conditions,which shows good stability,local weak areas and overall stability to meet the safety reserve requirements.