我国不少矿井直接坐落在高陡斜坡或老滑坡的坡脚,工程活动使边坡失稳或使老滑坡复活诱发地质灾害现象时有发生。对大型老滑坡而言,其复活变形持续时间长、滑移方向因应力场条件变化而改变、且具有多级非连续破坏等特征,给滑坡的稳定评价与科学防治带来难题。本文以朱家店煤矿滑坡为例,通过现场勘查和监测研究,详细查明了滑坡区工程地质条件、滑坡复活的各种诱发因素、滑坡的变形破坏特征以及工程活动与滑坡复活的时空关系等;在此基础上,对滑坡在井洞修筑、坡体堆载前后及坡脚开挖不同应力环境下的稳定性和变形特征进行了FLAC3D数值模拟分析,再现了滑坡质点位移、塑性状态和应变增量的变化规律,以及滑坡下部采煤巷道的受力和位移的变化特征,所得结论与现场监测结果一致。 Many mines in our country are located directly on the foot of steep slopes or old landslides. The engineering activities have caused the instability of the slopes or the resurgence of old landslides to induce geological disasters. For a large old landslide, the resurrection and deformation have a long duration, the slipping direction changes due to the change of the stress field conditions, and the multi-stage non-continuous damage and other characteristics of the landslide bring difficulties to the stability evaluation and scientific control of the landslide. Taking Zhujiadian coal mine landslide as an example, this paper detailedly identified the geological conditions of landslide, the various triggering factors of landslide resurgence, the deformation and failure characteristics of landslide, and the spatial and temporal relationship between engineering activities and landslide resurgence On the basis of this, the FLAC3D numerical simulation of landslide stability and deformation under various stress conditions of well construction, slope loading and slope foot excavation was carried out, and the displacement, plastic state and strain of landslide were reproduced The change rule of increment and the change of stress and displacement of the roadway in the lower part of the landslide. The conclusion is consistent with the result of on-site monitoring.