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基于岩石破裂损伤理论和气固耦合方法,利用RFPA2D-GasFlow数值模拟系统,对含不同厚度软分层煤层发生煤与瓦斯突出的微震前兆特征进行了分析。研究结果表明:随着软分层厚度的增加,微震前兆在时间上的分布表现越来越模糊,平静期增长,煤与瓦斯突出规模变大;而微震前兆在空间上的分布越来越集中,其与煤与瓦斯突出发生的初始位置有较好的一致性。研究结果对微震监测技术在煤与瓦斯突出监测中的应用有一定的参考价值。
Based on the theory of rock burst damage and the method of gas-solid coupling, the characteristics of microseismic precursors of coal and gas outburst occurred in soft seam with different thickness were analyzed by RFPA2D-GasFlow numerical simulation system. The results show that with the increase of soft delamination thickness, the distribution of microseismic precursors in time becomes more and more vague, the quiescence period increases, and the size of coal and gas outburst becomes larger; and the distribution of microseismic precursors is more and more concentrated in space , Which is in good agreement with the initial location of coal and gas outburst. The research results have certain reference value to the application of microseismic monitoring technology in coal and gas outburst monitoring.