关键词: 近距离, 下保护层, 冲击地压, 支承压力区, 微震

Abstract: Based on the geological and mining technical conditions of coal seam group in close distance, the distribution law of microseismic events and the influence range of roadway lateral abutment pressure during the production period of the upper working face after the mining of the lower protective layer are analyzed and studied by using microseismic data and drilling pressure relief technology. The engineering practice results show that: after the mining of the lower protective layer, the frequency and energy of the microseismic events in the upper coal seam decrease, and the elastic potential energy of the coal and rock mass in the affected area is released, and the lateral abatement pressure of the roadway transfers to the deep coal body, thus realizing the effect of preventing scour and reducing disaster.