断层带煤岩应力分布特征数值模拟研究
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摘要
通过FLAC3D软件对演马庄矿掘进巷道过F147断层过程中煤岩内部应力场分布规律进行数值模拟,研究巷道掘进过程中断层附近应力值的变化.模拟结果表明:F147断层带附近煤岩体破碎、裂隙发育,在采动影响下断层"活化".随着距断层面距离的减小,煤层及其顶板岩体破坏程度随之增加,使得断层面附近应力得到释放,断层面处压剪应力集中得以缓解,但是拉应力增大.通过进一步研究,确定了F147断层带的影响范围约为10 m,从而说明该方法能正确模拟巷道掘进过断层过程中煤岩内部应力场分布规律,进而可以有效地指导实践.
In this paper,the stress variation of nearby fault structure F147 is studied during the coal mining based on the numerical simulation of the stress distribution law in the coal rock for Yanmazhuang Mine by using FLAC3D software.The results show that the coal rock is broken;the fracture is expanded and the fault structure will be activated under the influence of the mining.With the reducing in distance between coal bed and rock roof,the destroy degree is aggrabated,so the stress at the nearby fault structure is released,and the crushing and shearing stress concentration of the fault can be relieved,but the pulling stress is added.According to the further studies,the range of influence is 10 meters,which shows that the proposed simulating methods can analyze the distribution law of stress field of coal rock during the mining in crossing fault,and the results can provide the reference value for practice.
In this paper,the stress variation of nearby fault structure F147 is studied during the coal mining based on the numerical simulation of the stress distribution law in the coal rock for Yanmazhuang Mine by using FLAC3D software.The results show that the coal rock is broken;the fracture is expanded and the fault structure will be activated under the influence of the mining.With the reducing in distance between coal bed and rock roof,the destroy degree is aggrabated,so the stress at the nearby fault structure is released,and the crushing and shearing stress concentration of the fault can be relieved,but the pulling stress is added.According to the further studies,the range of influence is 10 meters,which shows that the proposed simulating methods can analyze the distribution law of stress field of coal rock during the mining in crossing fault,and the results can provide the reference value for practice.
引文
[1]袁前进.岩巷掘进爆破对围岩稳定性影响的研究[J].煤矿开采,2009(3):100-102.
[2]王胜本,张晓.煤矿井下地质构造与地应力的关系[J].煤炭学报,2008,33(7):738-742.
[3]沈海超,程远方,赵益忠,等.基于实测数据及数值模拟断层对地应力的影响[J].岩石力学与工程学报,2008(9):3985-3990.
[4]肖红飞,何学秋.煤岩巷道掘进过程电磁辐射的时空分布规律研究[J].岩石力学与工程学报,2008(5):2868-2874.
[5]李起彤.活断层及其工程评价[M].北京:地震出版社,1991.
[6]柴建峰.河北平原活断层评价及区域构造应力场分析[D].石家庄:河北理工学院,2003.
[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]何俊,景长生,陈新生,等.煤层断层构造演化应力场分布特征数值模拟研究[J].河南理工大学学报:自然科学版,2010,29(1):1-6.
[9]于广明,谢和平,杨伦,等.采动断层活化分形界面效应的数值模拟研究[J].煤炭学报,1998,23(4):396-399.
[10]勾攀峰,胡有光.断层附近回采巷道顶板岩层运动特征研究[J].采矿与安全工程学报,2006,23(3):285-288.
[2]王胜本,张晓.煤矿井下地质构造与地应力的关系[J].煤炭学报,2008,33(7):738-742.
[3]沈海超,程远方,赵益忠,等.基于实测数据及数值模拟断层对地应力的影响[J].岩石力学与工程学报,2008(9):3985-3990.
[4]肖红飞,何学秋.煤岩巷道掘进过程电磁辐射的时空分布规律研究[J].岩石力学与工程学报,2008(5):2868-2874.
[5]李起彤.活断层及其工程评价[M].北京:地震出版社,1991.
[6]柴建峰.河北平原活断层评价及区域构造应力场分析[D].石家庄:河北理工学院,2003.
[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]何俊,景长生,陈新生,等.煤层断层构造演化应力场分布特征数值模拟研究[J].河南理工大学学报:自然科学版,2010,29(1):1-6.
[9]于广明,谢和平,杨伦,等.采动断层活化分形界面效应的数值模拟研究[J].煤炭学报,1998,23(4):396-399.
[10]勾攀峰,胡有光.断层附近回采巷道顶板岩层运动特征研究[J].采矿与安全工程学报,2006,23(3):285-288.
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