能量密度分析法在向斜构造区冲击地压防治中的应用

为了研究向斜构造区冲击地压特征及如何防治该类型冲击地压,本文以兴安煤矿典型向斜构造影响范围内的四水平1号工作面为研究对象,利用微震时空分布图和能量密度云图,研究了微震活动与冲击地压之间的关系.结果表明:冲击发生前微震的时空分布可直观反映微震事件的集中区域,但难以识别微震事件随时间的演化趋势;能量密度具有明显的成核特征,...

Application of energy density analysis method in prevention and control of rock burst in syncline structural area

In order to study the characteristics of rock burst in syncline structural area and how to prevent and control this type of rock burst, the relationship between microseismic activity and rock burst is studied by using microseismic spatial and temporal distribution map and energy density cloud chart on the 1 face of No. four level in the influence area of typical syncline structure in Xingan coal mine. The results show that: the temporal and spatial distribution of microseismic events before the impact can directly reflect the concentration area of microseismic events, but it is difficult to identify the evolution trend of microseismic events with time; the energy density has obvious nucleation characteristics, and has obvious expansion around the nucleation area until a strong mine earthquake occurs at the edge of the nucleation area. The seismic wave velocity tomography technology can effectively identify the high stress area formed by syncline structure, and implement large-diameter drilling and deep hole blasting measures for the coal seam in the high stress area. The microseismic activities caused by subsequent mining confirmed the effectiveness of these stress relief measures.