动压影响煤柱下方巷道微震特征及破坏机制
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摘要
为了研究动压对煤柱下方巷道稳定性的影响,采用高精度微震监测系统和顶板动态监测仪,研究了2200工作面底板微震活动特征和动压对4106巷道变形破坏的影响。结果表明:2200工作面底板微震事件具有非对称的特征,呈现下大上小的形态,微震事件集中发生深度约24m,4106材料巷受到2200工作面采动影响较小;2200工作面采空区对4106运输巷影响范围为120～140m,4106运输巷变形速率影响区域与2200工作面采动影响范围基本一致;随着煤柱宽度的增加,4106运输巷变形呈现先增大后减小的变化,最后趋于稳定,4106运输巷变形破坏表现出明显的非对称特征和区域化分布.
In order to study the influence of dynamic pressure on the stability of roadway under coal pillar,the characteristics of micro-seismic activity of floor in 2200 working face and the influence of dynamic pressure on deformation and failure of 4106 roadway were studied using high precision micro-seismic monitoring system and roof dynamic monitoring instrument.The results show that the micro-seismic events on the floor of 2200 working face are asymmetrical,showing the shape of large upwards and small downwards.The micro-seismic events mainly occur at the depth around 24 m,and the influence of 2200 working face on 4106 roadway is relatively less;the influence region of 2200 working face mined-out-area on 4106 transport roadway is 120—140 m,and the influenced area of 4106 transport roadway deformation rate is basically the same as that of 2200 working face.With the increase of coal pillar width,the deformation of 4106 transport roadway increases at first,then decreases,and finally tends to be stable.The deformation and failure of 4106 transport roadway show obvious asymmetric characteristics and regionalized distribution.
In order to study the influence of dynamic pressure on the stability of roadway under coal pillar,the characteristics of micro-seismic activity of floor in 2200 working face and the influence of dynamic pressure on deformation and failure of 4106 roadway were studied using high precision micro-seismic monitoring system and roof dynamic monitoring instrument.The results show that the micro-seismic events on the floor of 2200 working face are asymmetrical,showing the shape of large upwards and small downwards.The micro-seismic events mainly occur at the depth around 24 m,and the influence of 2200 working face on 4106 roadway is relatively less;the influence region of 2200 working face mined-out-area on 4106 transport roadway is 120—140 m,and the influenced area of 4106 transport roadway deformation rate is basically the same as that of 2200 working face.With the increase of coal pillar width,the deformation of 4106 transport roadway increases at first,then decreases,and finally tends to be stable.The deformation and failure of 4106 transport roadway show obvious asymmetric characteristics and regionalized distribution.
引文
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[22]LIU Chao,LI Shugang,CHENG Cheng,et al.Activation characteristics analysis on concealed fault in the excavating coal roadway based on microseismic monitoring technique[J].International Journal of Mining Science and Technology,2017,27(5):883-888.
[23]LIU Chao,LI Shugang,CHENG Cheng,et al.Identification methods for anomalous stress region in coal roadways based on microseismic information and numerical simulation[J].International Journal of Mining Science and Technology,2017,27(3):525-530.
[24]夏永学,蓝航,毛德兵,等.基于微震监测的超前支撑压力分布特征研究[J].中国矿业大学学报,2011,40(6):868-873.XIA Yongxue,LAN Hang,MAO Debing,et al.Study of the lead abutment pressure distribution base on microseismic monitoring[J].Journal of China U-niversity of Mining&Technology,2011,40(6):868-873.
[25]孙建,王连国,唐芙蓉,等.倾斜煤层底板破坏特征的微震监测[J].岩土力学,2011,32(5):1589-1595.SUN Jian,WANG Lianguo,TANG Furong,et al.Microseismic monitoring failure characteristics of inclined coal seam floor[J].Rock and Soil Mechanics,2011,32(5):1589-1595.
[26]刘泉声,张伟,卢兴利,等.断层破碎带大断面巷道的安全监控与稳定性分析[J].岩石力学与工程学报,2010,29(10):1954-1962.LIU Quansheng,ZHANG Wei,LU Xingli,et al.Safety monitoring and stability analysis of largescale roadway in fault fracture zone[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(10):1954-1962.
[27]孟庆彬,韩立军,乔卫国,等.应变软化与扩容特性极弱胶结围岩弹塑性分析[J].中国矿业大学学报,2018,47(4):760-767.MENG Qingbin,HAN Lijun,QIAO Weiguo,et al.Elastio-plastic analysis of the very weakly cemented surrounding rock considering characterictics of strain softenting and expansion[J].Journal of China University of Mining&Technology,2018,47(4):760-767.
[2]PAN Rui,WANG Qi,JIANG Bei,et al.Failure of bolt support and experimental study on the parameters of bolt-grouting for supporting the roadways in deep coal seam[J].Engineering Failure Analysis,2017,80:218-233.
[3]WANG Qi,RAN Rui,JIANG Bei,et al.Study on failure mechanism of roadway with soft rock in deep coal mine and confined concrete support system[J].Engineering Failure Analysis,2017,81:155-177.
[4]XIA Binwei,JIA Jinlong,YU Bin,et al.Coupling effects of coal pillars of thick coal seams in largespace stopes and hard stratum on mine pressure[J].International Journal of Mining Science and Technology,2017,27(6):965-972.
[5]侯朝炯.深部巷道围岩控制的有效途径[J].中国矿业大学学报,2017,46(3):467-473.HOU Chaojiong.Effective approach for surrounding rock control in deep roadway[J].Journal of China U-niversity of Mining&Technology,2017,46(3):467-473.
[6]李白英.预防矿井底板突水的“下三带”理论及其发展与应用[J].山东矿业学院学报,1999,18(4):11-18.LI Baiying.“Down Three Zones”in the prediction of water inrush from coalbed floor aquifer theory,development and application[J].Journal of Shandong Institute of Mining&Technology,1999,18(4):11-18.
[7]雷文杰,汪国华,薛晓晓.有限元强度折减法在煤层底板破坏中的应用[J].岩土力学,2011,32(1):299-303.LEI Wenjie,WANG Guohua,XUE Xiaoxiao.Application of finite element strength reduction method to destruction in coal seam floor[J].Rock and Soil Mechanics,2011,32(1):299-303.
[8]施龙青,韩进.开采煤层底板“四带”划分理论与实践[J].中国矿业大学学报,2005,34(1):16-23.SHI Longqing,HAN Jin.Theory and practice of dividing coal mining area floor into four-zone[J].Journal of China University of Mining&Technology,2005,34(1):16-23.
[9]华心祝,杨朋.深井大断面沿空留巷底板变形动态演化特征研究[J].中国矿业大学学报,2018,47(3):494-501.HUA Xinzhu,YANG Peng.Floor deformation dynamic evolution of gob-side entry retaining with large section in deep mine[J].Journal of China University of Mining&Technology,2018,47(3):494-501.
[10]YU Xiaoge,HAN Jin,SHI Longqing,et al.Application of a BP neural network in predicting destroyed floor depth caused by underground pressure[J].Environmental Earth Sciences,2017,76(15):535.
[11]SU Peili,WEI Zhengfan.Depth of floor failure of stope with medium-thickness coal seam[J].Geotechnical and Geological Engineering,2018,36:1341-1347.
[12]谢生荣,潘浩,陈冬冬,等.多煤层开采层间等效基本顶结构及其活动规律[J].中国矿业大学学报,2017,46(6):1219-1225.XIE Shengrong,PAN Hao,CHEN Dongdong,et al.The structure and activity laws of interlayer equivalent basic roof in multi-seam mining[J].Journal of China University of Mining&Technology,2017,46(6):1219-1225.
[13]蒋金泉,冯增强,韩继胜.跨采巷道围岩结构稳定性分类与支护参数决策[J].岩石力学与工程学报,1999,18(1):81-85.JIANG Jinquan,FENG Zengqiang,HAN Jisheng.Classification of structural stability of surrounding rocks of roadway affected by overhead mining and decision making of support parameters[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(1):81-85.
[14]李学华,姚强岭,张农,等.高水平应力跨采巷道围岩稳定性模拟研究[J].采矿与安全工程学报,2008,25(4):420-425.LI Xuehua,YAO Qiangling,ZHANG Nong,et al.Numerical simulation of stability of surrounding rock in high horizontal stress roadway under overhead mining[J].Journal of Mining&Safety Engineering,2008,25(4):420-425.
[15]李桂臣,马振乾,张农,等.淮北矿区多次跨采巷道破坏特征及控制对策研究[J].采矿与安全工程学报,2013,30(2):181-187.LI Guichen,MA Zhenqian,ZHANG Nong,et al.Research on failure characteristics and control measures of roadways affected by multiple overhead mining in Huaibei mining area[J].Journal of Mining&Safety Engineering,2013,30(2):181-187.
[16]谢文兵,史振凡,陈晓祥,等.工作面开采对底板岩巷稳定性的影响[J].中国矿业大学学报,2004,33(1):82-85.XIE Wenbing,SHI Zhenfan,CHEN Xiaoxiang,et al.Stability analysis of roadway surrounding rock induced by overhead mining[J].Journal of China University of Mining&Technology,2004,33(1):82-85.
[17]张蕊,姜振泉,岳尊彩,等.采动条件下厚煤层底板破坏规律动态监测及数值模拟研究[J].采矿与安全工程学报,2012,29(5):625-630.ZHANG Rui,JIANG Zhenquan,YUE Zuncai,et al.In-situ dynamic observation and numerical analysis of thick coal seam floor's failure law under the mining[J].Journal of Mining&Safety Engineering,2012,29(5):625-630.
[18]谢广祥,李家卓,王磊,等.采场底板围岩应力壳力学特征及时空演化[J].煤炭学报,2018,43(1):52-61.XIE Guangxiang,LI Jiazhuo,WANG Lei,et al.Mechanical characteristics and time and space evolvement of stress shell in stope floor stratum[J].Journal of China Coal Society,2018,43(1):52-61.
[19]张平松,吴基文,刘盛东.煤层采动底板破坏规律动态观测研究[J].岩石力学与工程学报,2006,25(增1):3009-3013.ZHANG Pingsong,WU Jiwen,LIU Shengdong.Study on dynamic observation of coal seam floor's failure law[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Sup 1):3009-3013.
[20]徐奴文,李术才,戴峰,等.岩质边坡微震活动特征及其施工相应分析[J].岩石力学与工程学报,2015,34(5):968-978.XU Nuwen,LI Shucai,DAI Feng,et al.Analysis on characteristics of microseisnic activity and its response to construction at rock slopes[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(5):968-978.
[21]陈炳瑞,冯夏庭,曾雄辉,等.深埋隧洞TBM掘进微震实时监测与特征分析[J].岩石力学与工程学报,2011,30(2):275-283.CHEN Bingrui,FENG Xiating,ZENG Xionghui,et al.Real-time microseismic monitoring and its characteristic analysis during TBM tunneling in deep-buried tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(2):275-283.
[22]LIU Chao,LI Shugang,CHENG Cheng,et al.Activation characteristics analysis on concealed fault in the excavating coal roadway based on microseismic monitoring technique[J].International Journal of Mining Science and Technology,2017,27(5):883-888.
[23]LIU Chao,LI Shugang,CHENG Cheng,et al.Identification methods for anomalous stress region in coal roadways based on microseismic information and numerical simulation[J].International Journal of Mining Science and Technology,2017,27(3):525-530.
[24]夏永学,蓝航,毛德兵,等.基于微震监测的超前支撑压力分布特征研究[J].中国矿业大学学报,2011,40(6):868-873.XIA Yongxue,LAN Hang,MAO Debing,et al.Study of the lead abutment pressure distribution base on microseismic monitoring[J].Journal of China U-niversity of Mining&Technology,2011,40(6):868-873.
[25]孙建,王连国,唐芙蓉,等.倾斜煤层底板破坏特征的微震监测[J].岩土力学,2011,32(5):1589-1595.SUN Jian,WANG Lianguo,TANG Furong,et al.Microseismic monitoring failure characteristics of inclined coal seam floor[J].Rock and Soil Mechanics,2011,32(5):1589-1595.
[26]刘泉声,张伟,卢兴利,等.断层破碎带大断面巷道的安全监控与稳定性分析[J].岩石力学与工程学报,2010,29(10):1954-1962.LIU Quansheng,ZHANG Wei,LU Xingli,et al.Safety monitoring and stability analysis of largescale roadway in fault fracture zone[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(10):1954-1962.
[27]孟庆彬,韩立军,乔卫国,等.应变软化与扩容特性极弱胶结围岩弹塑性分析[J].中国矿业大学学报,2018,47(4):760-767.MENG Qingbin,HAN Lijun,QIAO Weiguo,et al.Elastio-plastic analysis of the very weakly cemented surrounding rock considering characterictics of strain softenting and expansion[J].Journal of China University of Mining&Technology,2018,47(4):760-767.