先锋露天煤矿软岩边坡稳定性分析及控制方案设计

Soft rock slope stability analysis and control program design in Pioneer Open-pit Coal Mine

基于在露天矿山生产过程中软岩边坡稳定的重要性,结合先锋露天煤矿北帮边坡的地质条件,采用流固耦合数值模拟与理论研究相结合的研究方法,对边坡的位移场、应力场进行分析,研究高地下水位软岩边坡在自重应力下的破坏模式和发展趋势。结果表明:北帮边坡表层泥岩发生了大范围的水平向变形,且最大变形集中在坡脚和坡中;边坡的竖直向变形主要表现为坡脚的挤出和坡顶的沉降,并根据边坡的变形提出了清方减载和抗滑桩两种不同的防治措施,并验证了其可行性。

Based on the importance of soft rock slope stability in the production process of open-pit mines,combined with the geological conditions of the north slope in Pioneer Open-pit Coal Mine,the article adopts the research method of combining the numerical simulation of fluid-solid coupling and theoretical research to analyze the displacement field and stress field of the slope,and studies the damage mode and development trend of the soft rock slope under the self-gravitational stress of the high groundwater table.The results show that the surface mudstone of the north slope has undergone a wide range of horizontal deformation,and the maximum deformation is concentrated at the foot of the slope and in the middle of the slope.The vertical deformation of the slope is mainly manifested as the extrusion of the foot of the slope and the settlement of the top of the slope.According to the deformation of the slope,the article proposes two different preventive and control measures,namely,the clearing of the square to reduce the load and the anti-slip piles,and verifies the feasibility.