正断层上盘边角煤开采诱发断层活化规律
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摘要
为研究边角煤工作面采动断层活化规律,基于兴隆庄煤矿肖家庄三号正断层上盘5313工作面遗留边角煤开采,采用数值模拟研究工作面采动不同层位断层面应力和断层滑移量演化规律,分析采动诱发断层活化失稳的可能性。研究结果表明:随工作面与断层距离减小,断层面剪切应力与法向应力增大,两者比值升高,同时断层滑移量随之增长,断层活化失稳可能性增大;当工作面距断层小于30 m时,断层面应力比值显著升高,滑移量剧烈增大,断层活化最为显著。
In order to study the activation laws of mining fault in the edge coal face, based on the mining of the residual edge coal in No.3 normal fault in Xinlongzhuang Coal Mine 5313 working face, the evolution laws of fault stress and fault slip in different strata are studied by numerical simulation and the possibility of fault activation instability induced by mining is analyzed.The results show that with the decreasing of the distance between the face and the fault, the shear stress and normal stress of the fault plane increase, their ratio increases, and the slip of the fault also increases, and the possibility of fault activation instability increases. When the distance from the face to the fault is less than 30 m, the activity of fault is the most obvious.
In order to study the activation laws of mining fault in the edge coal face, based on the mining of the residual edge coal in No.3 normal fault in Xinlongzhuang Coal Mine 5313 working face, the evolution laws of fault stress and fault slip in different strata are studied by numerical simulation and the possibility of fault activation instability induced by mining is analyzed.The results show that with the decreasing of the distance between the face and the fault, the shear stress and normal stress of the fault plane increase, their ratio increases, and the slip of the fault also increases, and the possibility of fault activation instability increases. When the distance from the face to the fault is less than 30 m, the activity of fault is the most obvious.
引文
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[9]许磊,魏世明.正断层活化诱发冲击地压危险性研究[J].煤矿安全,2015,46(5):54-57.
[10]姜耀东,王涛,赵毅鑫,等.采动影响下断层活化规律的数值模拟研究[J].中国矿业大学学报,2013,42(1):1-5.
[2]姜耀东,赵毅鑫,刘文岗,等.煤岩冲击失稳的机理和实验研究[M].北京:科学出版社,2008.
[3]齐庆新,李晓璐,赵善坤.煤矿冲击地压应力控制理论与实践[J].煤炭科学技术,2013,41(6):1-5.
[4]姜福兴,魏全德,姚顺利,等.冲击地压防治关键理论与技术分析[J].煤炭科学技术,2013,41(6):6-9.
[5]潘俊锋,毛德兵,蓝航,等.我国煤矿冲击地压防治技术研究现状及展望[J].煤炭科学技术,2013,41(6):21-25.
[6]姜耀东,潘一山,姜福兴,等.我国煤炭开采中的冲击地压机理和防治[J].煤炭学报,2014,39(2):205.
[7]孟召平,彭苏萍,黎洪.正断层附近煤的物理力学性质变化及其对矿压分布的影响[J].煤炭学报,2001,26(6):561-566.
[8]李志华,窦林名,曹安业,等.采动影响下断层滑移诱发煤岩冲击机理[J].煤炭学报,2011,36(S1):68-73.
[9]许磊,魏世明.正断层活化诱发冲击地压危险性研究[J].煤矿安全,2015,46(5):54-57.
[10]姜耀东,王涛,赵毅鑫,等.采动影响下断层活化规律的数值模拟研究[J].中国矿业大学学报,2013,42(1):1-5.