遗留煤柱影响区域微震活动规律研究
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摘要
遗留煤柱影响区域易形成应力叠加,煤柱下方工作面冲击危险性较无煤柱影响回采期间一般有所升高。基于SOS微震监测系统监测桃山煤矿工作面通过煤柱影响区域的微震活动,分析了微震空间分布规律,能量、频次变化规律以及震动信号频谱特征。研究结果表明:工作面过煤柱影响区域,震动能量、频次均有显著提高,强矿震发生在微震活动持续增强或急剧下降阶段;冲击矿压主震信号较前兆信号有主频低,振幅大,速度快,衰减慢等特征。研究成果为评价煤柱影响区域冲击矿压危险性提供依据,具有一定的理论意义与实用价值。
The stress superposition would be occurred in the area affected by the left coal pillars.The coal mining face under the left coal pillars would have a more possibility to have the mine pressure bumping danger occurred than the pillarless mining area.Base on the micro seismic activities in the coal pillar influence area of the coal mining face in the Taoshan Mine monitored and measured with the SOS seismic monitoring and measuring system,the paper analyzed the micro seismic space distribution law,energy quantity,frequency variation law was well as the seismic signal spectrum features.The study results showed that(1) when the coal mining face passed through the coal pillar influence area,the seismic energy and frequency all would be obviously increased and after the high mine seismic occurred,the micro seismic activities would be continued or could be at the serious reduced stage,(2) in comparison with the forewarning signals,the main seismic signal of the mine pressure bumping would have the low main frequency,high amplitude,fast speed,attenuation slow and other features.The study achievements would be the references to the evaluation of the mine pressure bumping danger in the coal pillar influence area and would have the certain theoretical meaning and practical value.
The stress superposition would be occurred in the area affected by the left coal pillars.The coal mining face under the left coal pillars would have a more possibility to have the mine pressure bumping danger occurred than the pillarless mining area.Base on the micro seismic activities in the coal pillar influence area of the coal mining face in the Taoshan Mine monitored and measured with the SOS seismic monitoring and measuring system,the paper analyzed the micro seismic space distribution law,energy quantity,frequency variation law was well as the seismic signal spectrum features.The study results showed that(1) when the coal mining face passed through the coal pillar influence area,the seismic energy and frequency all would be obviously increased and after the high mine seismic occurred,the micro seismic activities would be continued or could be at the serious reduced stage,(2) in comparison with the forewarning signals,the main seismic signal of the mine pressure bumping would have the low main frequency,high amplitude,fast speed,attenuation slow and other features.The study achievements would be the references to the evaluation of the mine pressure bumping danger in the coal pillar influence area and would have the certain theoretical meaning and practical value.
引文
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[11]姜福兴,杨淑华,成云海,等.煤矿冲击地压的微地震监测研究[J].地球物理学报,2006,49(5):1511~1516.
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[13]赵本均.冲击地压及其防治[M].北京:煤炭工业出版社,1994.
[14]王存文,姜福兴,王平,等.煤柱诱发冲击地压的微震事件分布特征与力学机理[J].煤炭学报,2009,34(9):1169~1173.
[15]陆菜平,窦林名,吴兴容,等.岩体微震监测的频谱分析与信号识别[J].岩土工程学报,2005,27(7):772~775.
[2]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,2008.
[3]鞠金峰,许家林,朱卫兵,等.近距离煤层工作面出倾向煤柱动载矿压机理研究[J].煤炭学报,2010,35(1):15~20.
[4]CAO An-ye,DOU Lin-ming,CHEN Guo-xiang,et al.Focal mechanism caused by fracture or burst of a coal pillar[J].Journal of China University of Mining&Technology,2008,18(2):153~158.
[5]王连国,缪协兴.基于尖点突变模型的矿柱失稳机理研究[J].采矿与安全工程学报,2006,23(2):137~140.
[6]王连国,缪协兴.煤柱失稳的突变学特征研究[J].中国矿业大学学报,2007,36(1):7~11.
[7]潘岳,王志强.狭窄煤柱冲击地压的折迭突变模型[J].岩土力学,2004,25(1):23~30.
[8]郑百生,谢文兵,窦林名,等.不规则煤柱作用下工作面开采的三维数值模拟[J].煤炭学报,2006,31(2):137~140.
[9]王存权.近距离煤层开采斜交过上覆采空区煤柱矿压规律研究[J].中国煤炭,2006,32(2):35~37.
[10]窦林名,何学秋.采矿地球物理学[M].北京:中国科学文化出版社,2002.
[11]姜福兴,杨淑华,成云海,等.煤矿冲击地压的微地震监测研究[J].地球物理学报,2006,49(5):1511~1516.
[12]钱鸣高,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003.
[13]赵本均.冲击地压及其防治[M].北京:煤炭工业出版社,1994.
[14]王存文,姜福兴,王平,等.煤柱诱发冲击地压的微震事件分布特征与力学机理[J].煤炭学报,2009,34(9):1169~1173.
[15]陆菜平,窦林名,吴兴容,等.岩体微震监测的频谱分析与信号识别[J].岩土工程学报,2005,27(7):772~775.
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