口泉断裂与同忻井田强矿压显现的关系
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摘要
通过对口泉断裂的几何学、运动学和动力学的分析,确定了口泉断裂的活动特征和应力状态。在此基础上利用FLAC3D数值计算方法分析了口泉断裂两侧地块煤岩体的构造应力空间分布特征,并与同忻井田强矿压显现特征进行了对比分析。研究表明:口泉断裂在区域构造应力作用下活动性更强,更容易发生失稳;同忻井田位于口泉断裂活动性最强的中段,围岩及煤层中存在不均匀的、较高的构造应力,聚集了相对较高的弹性能量,决定了矿山压力显现的区域性分布。口泉断裂是同忻井田产生强矿压显现的地质动力因素,对井田矿压显现具有重要影响。
The Kouquan fault is the east boundary fault of Datong mining area,and Level-3 tectonic unit boundary of the Yungang block depression and the new Sanggan River rift.Tongxin minefield adjoins it.Through the analysis of geometry kinematics dynamics and activity characteristics,the stress state of the Kouquan fault is determined.On this basis,applying the FLAC3D numerical calculation method,the tectonic stress space distribution features on both sides of the Kouquan faultwere analysed,and compared with the strata behavior characteristics of the Tongxin minefield.Research shows that the action of the Kouquan fault is more active and stronger under regional tectonic stress,and its instability is more likely to happen.Tongxin minefield is located in the middle of the strongest activity area of the Kouquan fault.Surrounding rock and coal seams are asymmetrical and present higher tectonic stress,and gather relatively high elastic energy,which determine regional distribution.The Kouquan fault is the geological dynamic factor for strong strata behavior and controls the strata behavior of Tongxin minefield.
The Kouquan fault is the east boundary fault of Datong mining area,and Level-3 tectonic unit boundary of the Yungang block depression and the new Sanggan River rift.Tongxin minefield adjoins it.Through the analysis of geometry kinematics dynamics and activity characteristics,the stress state of the Kouquan fault is determined.On this basis,applying the FLAC3D numerical calculation method,the tectonic stress space distribution features on both sides of the Kouquan faultwere analysed,and compared with the strata behavior characteristics of the Tongxin minefield.Research shows that the action of the Kouquan fault is more active and stronger under regional tectonic stress,and its instability is more likely to happen.Tongxin minefield is located in the middle of the strongest activity area of the Kouquan fault.Surrounding rock and coal seams are asymmetrical and present higher tectonic stress,and gather relatively high elastic energy,which determine regional distribution.The Kouquan fault is the geological dynamic factor for strong strata behavior and controls the strata behavior of Tongxin minefield.
引文
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[15]陈蓥.同忻煤矿地质动力环境分析与矿压显现规律研究[D].阜新:辽宁工程技术大学,2011.Chen Ying.Research on geo-dynamic environment and strata-pres-sure behavior of Tongxin Mine[D].Fuxin:Liaoning TechnicalUnivsrsity,2011.
[2]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):561-565.Meng Zhaoping,Peng Suping,Li Hong.Influence of normal faults onthe physical and mechanical properties of coal and the distribution ofunderground pressure[J].Journal of China Coal Society,2001,26(6):561-565.
[3]李志华,窦林名,陈国祥,等.采动影响下断层冲击矿压危险性研究[J].中国矿业大学学报,2010,39(4):490-495.Li Zhihua,Dou Linming,Chen Guoxiang,et al.The risk of fault in-duced rockburst during mining[J].Journal of China University ofMining&Technology,2010,39(4):490-495.
[4]韦四江,支光辉,勾攀峰.滑动构造下回采工作面异常矿压显现规律模拟[J].西安科技大学学报,2010,30(4):402-405.Wei Sijiang,Zhi Guanghui,Gou Panfeng.Abnormal strata pressureof mining field under condition of gliding tectonics using numericalsimulation[J].Journal of Xi’an University of Science and Technolo-gy,2010,30(4):402-405.
[5]支光辉,韦四江,黄春光.告成矿滑动构造顶板矿压观测研究[J].矿冶工程,2011,31(3):22-25.Zhi Guanghui,Wei Sijiang,Huang Chunguang.Study on pressure ob-servation for roof of sliding structure in Gaocheng Coal Mine[J].Mining and Metallurgical Engineering,2011,31(3):22-25.
[6]尹立明,郭惟嘉,尹增德.断层影响下覆岩破坏规律研究[J].山东科技大学(自然科学版),2009,28(4):59-63.Yin Liming,Guo Weijia,Yin Zengde.Study on failure law of overla-ying strata under influence of faults[J].Journal of Shandong Univer-sity of Science and Technology(Natural Science),2009,28(4):59-63.
[7]闫宪磊,陈学华,闫宪洋.综放工作面过断层期间微震规律分析[J].煤炭学报,2011,36(S1):83-87.Yan Xianlei,Chen Xuahua,Yan Xianyang.Analysis on microseismiclaw when fully-mechanized coalface passed through fault[J].Journalof China Coal Society,2011,36(S1):83-87.
[8]张宏伟,马翼飞,段可信.构造应力与矿区地震[J].辽宁工程技术大学学报(自然科学版),1998,17(1):1-6.Zhang Hongwei,Ma Yifei,Duan Kexin.Tectonic stress and mineearthquakes[J].Journal of Liaoning Technical University(Natu-ral Science Edition),1998,17(1):1-6.
[9]张宏伟,邓智毅.地质动力区划在岩体应力预测中的应用[J].安徽理工大学学报(自然科学版),2004,24(3):9-13.Zhang Hongwei,Deng Zhiyi.The application of geo-dynamic divisionin rock stress prediction[J].Journal of Anhui University of Scienceand Technology(Natural Science),2004,24(3):9-13.
[10]张宏伟,韩军,宋卫华,等.地质动力区划[M].北京:煤炭工业出版社,2009.Zhang Hongwei,Han Jun,Song Weihua,et al.Geodynamic division[M].Beijing:China Coal Industry Publishing House,2009.
[11]王秀文,郭星全,陈建国.大同地震台水准形变异常调查与地震关系的研究[J].华北地震科学,2004,22(1):18-22.Wang Xiuwen,Guo Xingquan,Chen Jianguo.Study on the relation-ship of the fixed leveling anomalies in Datong Seismostation withearthquakes[J].North China Earthquake Sciences,2004,22(1):18-22.
[12]王贞海.口泉断裂带中段断裂组合特征及活动性研究[J].山西建筑,2008,34(35):124-125.
[13]张跃刚,胡新康.华北地区块体及其边界的相对运动[J].大地测量与地球动力学,2005,25(1):47-50.Zhang Yuegang,Hu Xinkang.Relative motion between plates andtheir boundaries in north China[J].Crustal Deformation and Earth-quake,2005,25(1):47-50.
[14]徐伟,刘旭东,张世民.口泉断裂中段晚第四纪以来断错地貌及滑动速率确定[J].地震地质,2011,33(2):335-344.Xu Wei,Liu Xudong,Zhang Shimin.Late quaternary faulted land-forms and determination of slip rates of the middle part of Kouquanfault[J].Seismology and Geology,2011,33(2):335-344.
[15]陈蓥.同忻煤矿地质动力环境分析与矿压显现规律研究[D].阜新:辽宁工程技术大学,2011.Chen Ying.Research on geo-dynamic environment and strata-pres-sure behavior of Tongxin Mine[D].Fuxin:Liaoning TechnicalUnivsrsity,2011.
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