基于背景应力场与微震活动性的注浆帷幕突水危险性评价
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摘要
为了研究背景应力场、微震活动规律和突水危险性之间的关系,结合张马屯铁矿注浆帷幕共同体堵水工程,运用已经建立并运行的ESG微震监测系统,圈定微破裂形成并积聚的三维空间,划分注浆帷幕共同体的突水危险区域。通过三维有限元程序MSC.PATRAN建立矿帷幕共同体的三维力学模型,模拟高水压下的背景应力场分布,得到矿帷幕共同体的应力场集中区域。二者对比结果表明:帷幕西南区域和矿体采空区两侧积聚了大量的微震定位事件,微震活动性信息较为明显;而在上述2个区域,高水压力和开采扰动使原应力场发生极大改变,出现了明显的地应力集中现象,说明应力场的扰动会诱发微破裂的萌生、发展和贯通。微震活动规律与背景应力场表现出了很好的一致性,采用不同的科研手段分析和预测注浆帷幕共同体背景应力场和微震活动规律的前兆性信息特征,并且初步评价其突水危险性。研究成果可以指导工程技术人员采取相应的开采方式和防治措施,为井下开采活动的正常运行提供安全保障。
In order to understand the relation between background stress field of three-dimensional numerical simulation with microseismicity and water inrush probability,combining with an engineering case of grout curtain community for Zhangmatun iron mine,an operation microseismic monitoring system of ESG is used.Then,the accumulated three-dimensional geometry spaces of micro-rupture is delineated;and the possible dangerous water inrush regions of grout curtain community are divided.A three-dimensional mechanical model of curtain community is established by three-dimensional FEM,MSC.PATRAN,to simulate the background stress field distribution under high water pressure to obtain the stress field concentration region of curtain community.The comparative research results show that a large number of microseismic location events are accumulated at curtain southwest region and orebody bilateral mined-out area;the microseismicity information is very clear;original stress field greatly changes under high water pressure and mining disturbance in the above two region.There are the apparent stress concentrations here,which implies that micro-rupture will occur,develop and link under high stress.So microseismicity and background stress fields are almost consistent;and different scientific research methods illustrate the precursory characteristics of background stress field and microseismicity of grout curtain community.Then,the probability of water inrush is evaluated preliminarily.As a result,some reasonable exploitation methods and prevention measures can be adopted to provide safe measures for underground mining activities.
In order to understand the relation between background stress field of three-dimensional numerical simulation with microseismicity and water inrush probability,combining with an engineering case of grout curtain community for Zhangmatun iron mine,an operation microseismic monitoring system of ESG is used.Then,the accumulated three-dimensional geometry spaces of micro-rupture is delineated;and the possible dangerous water inrush regions of grout curtain community are divided.A three-dimensional mechanical model of curtain community is established by three-dimensional FEM,MSC.PATRAN,to simulate the background stress field distribution under high water pressure to obtain the stress field concentration region of curtain community.The comparative research results show that a large number of microseismic location events are accumulated at curtain southwest region and orebody bilateral mined-out area;the microseismicity information is very clear;original stress field greatly changes under high water pressure and mining disturbance in the above two region.There are the apparent stress concentrations here,which implies that micro-rupture will occur,develop and link under high stress.So microseismicity and background stress fields are almost consistent;and different scientific research methods illustrate the precursory characteristics of background stress field and microseismicity of grout curtain community.Then,the probability of water inrush is evaluated preliminarily.As a result,some reasonable exploitation methods and prevention measures can be adopted to provide safe measures for underground mining activities.
引文
[1]杨天鸿,唐春安,徐涛,等.岩石破裂过程的渗流特性——理论、模型与应用[M].北京:科学出版社,2004.(YANG Tianhong,TANG Chun′an,XU Tao,et al.Seepage characteristics in rock failure—theory,model and applications[M].Beijing:Science Press,2004.(in Chinese))
[2]黎良杰,钱鸣高,李树刚.断层突水机制分析[J].煤炭学报,1996,21(2):119–123.(LI Liangjie,QIAN Minggao,LI Shugang.Mechanism of water inrush through fault[J].Journal of China Coal Society,1996,21(2):119–123.(in Chinese))
[3]孙明贵,李天珍,黄先伍,等.基于层状岩体渗流失稳条件的煤矿突水机制[J].中国矿业大学学报,2005,34(3):284–293.(SUN Minggui,LI Tianzhen,HUANG Xianwu,et al.Mechanism of water inrush based on instability of the seepage flow in rock strata[J].Journal of China University of Mining and Technology,2005,34(3):284–293.(in Chinese))
[4]张彦青.岩溶水的突水机制分析[J].山西焦煤科技,2004,28(9):20–23.(ZHANG Yanqing.Analysis of water inrush mechanism of karst water[J].Shanxi Coking Coal Science and Technology,2004,28(9):20–23.(in Chinese))
[5]李抗抗,王成绪.用于煤层底板突水机制研究的岩体原位测试技术[J].煤田地质与勘探,2001,25(3):31–34.(LI Kangkang,WANG Chengxu.Technique measuring stress of rock mass used in study of mechanism of water inrush from coal floor[J].Coal Geology and Exploration,2001,25(3):31–34.(in Chinese))
[6]张辉.带压开采工作面的突水机制及防治水工作[J].中国煤田地质,2004,16(5):43–45.(ZHANG Hui.Water inrush mechanism and control on mining faces under water pressure[J].Coal Geology of China,2004,16(5):43–45.(in Chinese))
[7]王媛,刘杰.裂隙岩体非恒定渗流场与弹性应力场动态全耦合分析[J].岩石力学与工程学报,2007,26(6):1 151–1 157.(WANG Yuan,LIU Jie.Complete coupling analysis of transient fluid flow and elastic stress in fractured rock masses[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(6):1 151–1 157.(in Chinese))
[8]刘先珊,周创兵.裂隙岩体非饱和水力应力耦合的不连续介质模型研究[J].岩石力学与工程学报,2007,26(7):1 486–1 497.(LIU Xianshan,ZHOU Chuangbing.Study on discontinuous medium model for unsaturated hydro-mechanical coupling of fractured rock masses[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(7):1 486–1 497.(in Chinese))
[9]鲁振华,张连城.门头沟矿微震的近场监测效能评估[J].地震,1989,10(5):32–39.(LU Zhenhua,ZHANG Liancheng.Evaluation of near-field monitoring efficiency of tremors in Mentougou mine[J].Earthquake,1989,10(5):32–39.(in Chinese))
[10]李庶林,伊贤刚,郑文达,等.凡口铅锌矿多通道微震监测系统及其应用研究[J].岩石力学与工程学报,2005,24(12):2 048–2 053.(LI Shulin,YI Xiangang,ZHENG Wenda,et al.Research on multi-channel microseismic monitoring system and its application to Fankou lead-zinc mine[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(12):2 048–2 053.(in Chinese))
[11]唐礼忠,潘长良,杨承祥,等.冬瓜山铜矿微震监测系统建立及应用研究[J].采矿技术,2006,6(3):272–277.(TANG Lizhong,PAN Changliang,YANG Chengxiang,et al.Research on microseismic monitoring system and its application to Dongguashan copper mine[J].Mining Technology,2006,6(3):272–277.(in Chinese))
[12]姜福兴,XUN Luo,杨淑华.采场覆岩空间破裂与采动应力场的微震探测研究[J].岩土工程学报,2003,25(1):23–25.(JIANG Fuxing,XUN Luo,YANG Shuhua.Study on microseismic monitoring for spatial structure of overlying strata and mining pressure field in longwall face[J].Chinese Journal of Geotechnical Engineering,2003,25(1):23–25.(in Chinese))
[13]成云海,姜福兴,张兴民,等.微震监测揭示的C型采场空间结构及应力场[J].岩石力学与工程学报,2007,26(1):102–107.(CHENG Yunhai,JIANG Fuxing,ZHANG Xingmin,et al.C-shaped strata spatial structure and stress field in longwall face monitored by microseismic monitoring[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(1):102–107.(in Chinese))
[14]杨天鸿,唐春安,谭志宏,等.岩体破坏突水模型研究现状及突水预测预报研究发展趋势[J].岩石力学与工程学报,2007,26(2):268–277.(YANG Tianhong,TANG Chun′an,TAN Zhihong,et al.State of the art of water inrush models in rock mass failure and developing trend for prediction and forecast of groundwater inrush[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(2):268–277.(in Chinese))
[15]赵兴东,唐春安,李元辉,等.基于微震监测及应力场分析的冲击地压预测方法[J].岩石力学与工程学报2,005,24(增1)4:745–4 749.(ZHAO Xingdong,TANG Chun′an,LI Yuanhui,et al.Prediction method of rockburst based on microseismic monitoring and stress field analysis[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(Supp.1):4 745–4 749.(in Chinese))
[16]WANG H L,GE M C.Acoustic emission/microseismic source location analysis for a limestone mine exhibiting high horizontal stresses[J].International Journal of Rock Mechanics and Mining Sciences,2008,45(5):720–728.
[17]MERCERA R A,BAWDEN W F.A statistical approach for the integrated analysis of mine induced seismicity and numerical stress estimates,a case study—part II:evaluation of the relations[J].International Journal of Rock Mechanics and Mining Sciences,2005,42(1):73–94.
[2]黎良杰,钱鸣高,李树刚.断层突水机制分析[J].煤炭学报,1996,21(2):119–123.(LI Liangjie,QIAN Minggao,LI Shugang.Mechanism of water inrush through fault[J].Journal of China Coal Society,1996,21(2):119–123.(in Chinese))
[3]孙明贵,李天珍,黄先伍,等.基于层状岩体渗流失稳条件的煤矿突水机制[J].中国矿业大学学报,2005,34(3):284–293.(SUN Minggui,LI Tianzhen,HUANG Xianwu,et al.Mechanism of water inrush based on instability of the seepage flow in rock strata[J].Journal of China University of Mining and Technology,2005,34(3):284–293.(in Chinese))
[4]张彦青.岩溶水的突水机制分析[J].山西焦煤科技,2004,28(9):20–23.(ZHANG Yanqing.Analysis of water inrush mechanism of karst water[J].Shanxi Coking Coal Science and Technology,2004,28(9):20–23.(in Chinese))
[5]李抗抗,王成绪.用于煤层底板突水机制研究的岩体原位测试技术[J].煤田地质与勘探,2001,25(3):31–34.(LI Kangkang,WANG Chengxu.Technique measuring stress of rock mass used in study of mechanism of water inrush from coal floor[J].Coal Geology and Exploration,2001,25(3):31–34.(in Chinese))
[6]张辉.带压开采工作面的突水机制及防治水工作[J].中国煤田地质,2004,16(5):43–45.(ZHANG Hui.Water inrush mechanism and control on mining faces under water pressure[J].Coal Geology of China,2004,16(5):43–45.(in Chinese))
[7]王媛,刘杰.裂隙岩体非恒定渗流场与弹性应力场动态全耦合分析[J].岩石力学与工程学报,2007,26(6):1 151–1 157.(WANG Yuan,LIU Jie.Complete coupling analysis of transient fluid flow and elastic stress in fractured rock masses[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(6):1 151–1 157.(in Chinese))
[8]刘先珊,周创兵.裂隙岩体非饱和水力应力耦合的不连续介质模型研究[J].岩石力学与工程学报,2007,26(7):1 486–1 497.(LIU Xianshan,ZHOU Chuangbing.Study on discontinuous medium model for unsaturated hydro-mechanical coupling of fractured rock masses[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(7):1 486–1 497.(in Chinese))
[9]鲁振华,张连城.门头沟矿微震的近场监测效能评估[J].地震,1989,10(5):32–39.(LU Zhenhua,ZHANG Liancheng.Evaluation of near-field monitoring efficiency of tremors in Mentougou mine[J].Earthquake,1989,10(5):32–39.(in Chinese))
[10]李庶林,伊贤刚,郑文达,等.凡口铅锌矿多通道微震监测系统及其应用研究[J].岩石力学与工程学报,2005,24(12):2 048–2 053.(LI Shulin,YI Xiangang,ZHENG Wenda,et al.Research on multi-channel microseismic monitoring system and its application to Fankou lead-zinc mine[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(12):2 048–2 053.(in Chinese))
[11]唐礼忠,潘长良,杨承祥,等.冬瓜山铜矿微震监测系统建立及应用研究[J].采矿技术,2006,6(3):272–277.(TANG Lizhong,PAN Changliang,YANG Chengxiang,et al.Research on microseismic monitoring system and its application to Dongguashan copper mine[J].Mining Technology,2006,6(3):272–277.(in Chinese))
[12]姜福兴,XUN Luo,杨淑华.采场覆岩空间破裂与采动应力场的微震探测研究[J].岩土工程学报,2003,25(1):23–25.(JIANG Fuxing,XUN Luo,YANG Shuhua.Study on microseismic monitoring for spatial structure of overlying strata and mining pressure field in longwall face[J].Chinese Journal of Geotechnical Engineering,2003,25(1):23–25.(in Chinese))
[13]成云海,姜福兴,张兴民,等.微震监测揭示的C型采场空间结构及应力场[J].岩石力学与工程学报,2007,26(1):102–107.(CHENG Yunhai,JIANG Fuxing,ZHANG Xingmin,et al.C-shaped strata spatial structure and stress field in longwall face monitored by microseismic monitoring[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(1):102–107.(in Chinese))
[14]杨天鸿,唐春安,谭志宏,等.岩体破坏突水模型研究现状及突水预测预报研究发展趋势[J].岩石力学与工程学报,2007,26(2):268–277.(YANG Tianhong,TANG Chun′an,TAN Zhihong,et al.State of the art of water inrush models in rock mass failure and developing trend for prediction and forecast of groundwater inrush[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(2):268–277.(in Chinese))
[15]赵兴东,唐春安,李元辉,等.基于微震监测及应力场分析的冲击地压预测方法[J].岩石力学与工程学报2,005,24(增1)4:745–4 749.(ZHAO Xingdong,TANG Chun′an,LI Yuanhui,et al.Prediction method of rockburst based on microseismic monitoring and stress field analysis[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(Supp.1):4 745–4 749.(in Chinese))
[16]WANG H L,GE M C.Acoustic emission/microseismic source location analysis for a limestone mine exhibiting high horizontal stresses[J].International Journal of Rock Mechanics and Mining Sciences,2008,45(5):720–728.
[17]MERCERA R A,BAWDEN W F.A statistical approach for the integrated analysis of mine induced seismicity and numerical stress estimates,a case study—part II:evaluation of the relations[J].International Journal of Rock Mechanics and Mining Sciences,2005,42(1):73–94.
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