Zezhou Tian'an Coal Industry Co., Ltd., Shanxi Jinmei Group

以91302孤岛工作面为研究对象,建立了能量冲击地压预警指数(ERW指数),分析了S值、b值和能量指数等参数对冲击地压的响应关系。结果表明:利用微震事件的时空分布和能量密度云图对8月22日和9月28日发生两次冲击地压进行解释,综合对比多起冲击地压事件得出S值迅速增大、b值显著减小、能量指数迅速增大是预测冲击地压发生的重要指标,建立的ERW指数预测方法显著提高了冲击地压的预测准确性。

Taking the 91302 isolated island working face as the research object, an Energy Rock Burst Early Warning Index (ERW Index) is established, and the response relationship of parameters such as S value, b value, energy index and others to rock burst is analyzed. The results show that using the space-time distribution and energy density cloud maps of microseismic events to explain the two rock burst events that occurred on August 22nd and September 28th, multiple rock burst events are comprehensively compared to conclud that the rapid increase in S value, significant decrease in b value, and rapid increase in energy index are important indicators for predicting rock burst occurrence. The established ERW index prediction method significantly improves the accuracy of rock burst prediction.