安太堡矿与东露天矿换界开采对南帮边坡稳定性的影响

Effect of mining sector exchange of Antaibao Mine and East Open-pit mine on the south slope stability

安太堡矿南帮边坡同时受露井联采、4~#煤风化、南帮靠帮等一系列不利影响,为了确保安太堡矿与东露天矿换界开采期间南帮边坡安全,利用FLAC^(3D)分析了南帮可能的破坏模式,利用GEO-Slope分析了南帮的稳定性。研究认为安太堡换界开采期间南帮边坡的破坏模式主要为上层黄土的崩塌破坏和弱层上部岩土体的顺层滑动,南部二号井工矿采空区影响范围到南帮上部表土台阶;虽然南帮表土台阶出现了局部崩塌现象,但是南帮整体的稳定性满足规范要求,能保证换界开采安全平稳进行。

The south slope is affected by a series of adverse effects such as open-pit and well combined mining,4^#coal weathering,and by slope.In order to ensure the south slope safety during the mining sector exchange,this article analyzes the possible failure modes and stability of south slope using FLAC3D and GEO-Slope.Research believes that the failure mode of the south slope is mainly the collapse of the upper loess and the CIS sliding of the rock and soil in the upper part of the weak layer during the mining.The influence range of goaf in No.2well is to the upper topsoil steps.Although the local collapse appears in the south slope,but the whole stability of the south slope meets needs,which can ensure safe and stable operation of mining.