基于FLAC3D的露天矿边坡破坏成因研究与预测

针对某矿区发生多起大规模滑坡、崩塌等地质灾害,对露天矿的安全和正在进行的残矿回采工作造成威胁的问题,以矿区内某矿山为研究对象,利用FLAC3D软件建立露天矿坑边坡数值分析模型,采用传统地质分析方法结合数值模拟对边坡破坏成因进行分析.结果 显示,凝灰岩中发育的顺坡向节理是边坡发生滑塌的关键因素.强度折减法计算结果可知,边坡内部沿节理面形成贯通滑带,是最危险的潜在破坏面;随着时间的推移,深层节理面强度弱化,边坡可能再次发生滑塌.

Analysis and prediction of open pit slope failure based on FLCA3D

As to the problem that there are many geological disasters such as the large scale landslide and collapse in a mining area, and the safety of open pit and the residual depesit mining are threatened, taking a mine of the mining area as the research object, the numerical analysis model of the open pit slope is built by FLAC3D software, and the traditional geological analysis method is combined with the numerical simulation to analyze the cause of slope failure. The results show that the joints along the slope direction developed in tuff are the key factor for slope landslide and collapse. According to the calculation results of the strength reduction method, a penetrating sliding zone is formed along the joint surface of the slope internal, which is the most dangerous potential failure surface. Over time, the strength of the deep joint surface is weaken, and then the slope may collapse once again.