微震法在煤与瓦斯突出监测与预报中的应用
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摘要
瓦斯在煤岩体中的流动和冲击会产生弹性波,通过监测并分析该弹性波,提前预测煤的受力状态,并对应力集中源进行定位,以达到提前预测煤与瓦斯突出的目的。采用SOS微震监测系统,针对海孜煤矿Ⅱ1026机巷"4.25"煤与瓦斯突出的现场实测,取得了如下主要结论:①提出煤与瓦斯突出综合预测指标:震动能量和频次、微震活动度S及断层总面积A(t);②煤与瓦斯突出发生在频度和能级出现急剧增加后、微震活动度增强后、以及断层总面积出现高值异常后;利用上述指标,可以为矿井煤与瓦斯突出预测提供依据与经验。
By monitoring and analysis of the elastic wave which appears as gas flows and gas shocks in coal and rock,it is possible to forecast coal's stress state and to locate the source of stress concentration so that to achieve the outburst forecast of coal and gas in advance.With SOS microseismic(MS) monitoring system,the outburst of coal and gas happened at No.1026 working face in the conveyor roadway of Haizi mine on April 25 was measured on-site.The achieved results are as follows.Three indexes were proposed for outburst forecasting of coal and gas that were seismic energy and seismic frequency,seismicity S and total fault area A(t).After seismic energy and frequency increased dramatically,seismicity enhanced and total fault area appeared abnormal high value,coal and gas outburst would happen.Basis and experience were proposed for outburst forecasting of coal and gas by the above three indexes.
By monitoring and analysis of the elastic wave which appears as gas flows and gas shocks in coal and rock,it is possible to forecast coal's stress state and to locate the source of stress concentration so that to achieve the outburst forecast of coal and gas in advance.With SOS microseismic(MS) monitoring system,the outburst of coal and gas happened at No.1026 working face in the conveyor roadway of Haizi mine on April 25 was measured on-site.The achieved results are as follows.Three indexes were proposed for outburst forecasting of coal and gas that were seismic energy and seismic frequency,seismicity S and total fault area A(t).After seismic energy and frequency increased dramatically,seismicity enhanced and total fault area appeared abnormal high value,coal and gas outburst would happen.Basis and experience were proposed for outburst forecasting of coal and gas by the above three indexes.
引文
[1]何学秋,刘明举.含瓦斯煤岩破坏电磁动力学[M].徐州:中国矿业大学出版社,1995:56-89.
[2]A.A坎波利,M.特里维兹,G.M莫林达,等.煤与瓦斯突出的预测与防治[J].矿业安全与环保,1987(3):47-51.
[3]石坚胜,李希建,杨文涛.煤与瓦斯突出预报研究[J].矿业快报,2008(2):26-28.
[4]杨国强,王庆利,王忠鑫.基于微震监测技术的煤与瓦斯突出预报分析[J].煤矿安全,2010(8):108-111.
[5]齐庆新,窦林名.冲击地压理论与技术[M].徐州:中国矿业大学出版社,2001:101-125.
[6]谷继成,魏富胜.论地震活动性的定量化:地震活动度[J].中国地震,1987(3):12-22.
[7]时振梁,张少泉,赵荣国.地震工作手册[S].北京:地震出版社,1990.
[2]A.A坎波利,M.特里维兹,G.M莫林达,等.煤与瓦斯突出的预测与防治[J].矿业安全与环保,1987(3):47-51.
[3]石坚胜,李希建,杨文涛.煤与瓦斯突出预报研究[J].矿业快报,2008(2):26-28.
[4]杨国强,王庆利,王忠鑫.基于微震监测技术的煤与瓦斯突出预报分析[J].煤矿安全,2010(8):108-111.
[5]齐庆新,窦林名.冲击地压理论与技术[M].徐州:中国矿业大学出版社,2001:101-125.
[6]谷继成,魏富胜.论地震活动性的定量化:地震活动度[J].中国地震,1987(3):12-22.
[7]时振梁,张少泉,赵荣国.地震工作手册[S].北京:地震出版社,1990.
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