基于震动场监测的采动覆岩运移规律分析

Analysis of mining overburden movement law based on vibration field monitoring

针对现阶段冲击地压频发现象,本文通过理论分析、现场监测手段对采动影响下覆岩裂隙发育高度、工作面超前支承压力影响距离实现监测,对覆岩裂隙发育规律进行研究,主要得到:①采动影响下单工作面见方阶段覆岩裂隙发育高度约为90m;②基于微震监测揭示的微震事件平面超前分布距离约为180m,优化了矿井超前支护。该监测成果对矿井安全生产起到重要指导作用,为相似冲击地压矿井具有借鉴意义。

In view of the frequent occurrence of rock burst, through theoretical analysis and field monitoring methods to monitor the height of the fracture development of overlying rock and the influence distance of the overbearing pressure on the working face, the law of the fracture development of the overburden is studied, and the main results are as follows:(1) the development of the overlying rock fracture in the single stage of the single working face under the influence of the mining. The height is about 90 m.(2) The advance distribution distance of microseismic events based on microseismic monitoring is about 180 m, which optimizes the advance support of mine. The monitoring results play an important guiding role in mine safety production, and can be used for reference for similar rock burst mines.