深部冲击倾向煤岩循环加卸载的纵波波速与应力关系试验研究
|
摘要
研究了单轴循环加卸载条件下深部冲击倾向煤岩样应力与纵波波速的耦合关系,基于煤岩试样在弹性阶段纵波波速变化梯度大,塑性阶段波速变化趋于平缓的特征建立了应力与纵波波速之间的试验关系模型,并对模型参数进行了分析。研究表明:①由于闭合的孔隙和裂隙又重新张开,颗粒之间的压实程度减弱,煤岩试样卸载过程中,随着应力的降低,波速也降低;②部分裂隙和孔隙在压密阶段发生永久闭合,造成应力降低后再无法张开,因此下一循环的开始纵波波速值要大于第一个循环开始时的波速值;③与实测值的相关系数计算结果表明,试验关系模型具有较高的拟合度,很好地体现了试样纵波波速变化对载荷的敏感程度。
Through the laboratorial research,the coupling correlation between stress and P wave velocity are studied under uniaxial cyclic loading and unloading ways to create the experimental model based on the characteristic that the velocity gradient is usually high at elastic stage and then begins to level out at plastic stage for burst tendency coal and rock samples from deep coal mine.Also the parameters of the derived model are analyzed.Studies indicate that: ①In the unloading process,the P wave velocity decrease with the drop of stress because of the reopen of closed crack and weakening in the compaction degree between grains;②The starting P wave velocity of next cyclic is higher than the starting of first cyclic,because that partial crack and pore that closed permanently in the compression phase can not reopen when stress decrease;③The calculated correlation coefficients to measured value show that the experimental model has the better fitness,and can be well applied to describe the P wave changing sensitivity degree of samples under stress.
Through the laboratorial research,the coupling correlation between stress and P wave velocity are studied under uniaxial cyclic loading and unloading ways to create the experimental model based on the characteristic that the velocity gradient is usually high at elastic stage and then begins to level out at plastic stage for burst tendency coal and rock samples from deep coal mine.Also the parameters of the derived model are analyzed.Studies indicate that: ①In the unloading process,the P wave velocity decrease with the drop of stress because of the reopen of closed crack and weakening in the compaction degree between grains;②The starting P wave velocity of next cyclic is higher than the starting of first cyclic,because that partial crack and pore that closed permanently in the compression phase can not reopen when stress decrease;③The calculated correlation coefficients to measured value show that the experimental model has the better fitness,and can be well applied to describe the P wave changing sensitivity degree of samples under stress.
引文
[1]窦林名,何学秋.冲击矿压防治理论与技术[M].徐州:中国矿业大学出版社,2001.
[2]齐庆新,窦林名.冲击地压理论与技术[M].徐州:中国矿业大学出版社,2008.
[3]姜福兴,杨淑华,成云海,等.煤矿冲击地压的微地震监测研究[J].地球物理学报,2006,49(5):1511-1516.JIANG Fu-xing,YANG Shu-hua,CHENG Yun-hai,et al.A study on microseismic monitoring of rock burst in coal mine[J].Chinese Journal Geophysics,2006,49(5):1511-1516.
[4]李志华,窦林名,管向清,等.矿震前兆分区监测方法及应用[J].煤炭学报,2009,34(5):614-618.LI Zhi-hua,DOU Lin-ming,GUAN Xiang-qing,et al.A zoning monitoring method of microseismic premonition and its application[J].Journal of China Coal Society,2009,34(5):614-618.
[5]张明伟,窦林名,王占成,等.深井SOS微震监测系统建设与应用[J].煤矿开采,2010,15(2):16-20.ZHANG Ming-wei,DOU Lin-ming,WANG Zhan-cheng,et al.Construction and application of SOS micro-seismic monitoring system in deep mine[J].Coal Mining Technology,2010,15(2):16-20.
[6]窦林名,田京城,陆菜平,等.组合煤岩冲击破坏电磁辐射规律研究[J].岩石力学与工程学报,2005,24(19):3541-3544.DOU Lin-ming,TIAN Jing-cheng,LU Cai-ping,et al.Research on electromagnetic radiation rules of composed coal-rock burst failure[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(19):3541-3544.
[7]窦林名,王云海,何学秋,等.煤样变形破坏峰值前后电磁辐射特征研究[J].岩石力学与工程学报,2007,26(5):908-914.DOU Lin-ming,WANG Yun-hai,HE Xue-qiu,et al.Study on electromagnetic emission characteristic for coal sample deformation and failure during pre-and post-peaking phases[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):908-914.
[8]姜福兴,苗小虎,王存文,等.构造控制型冲击地压的微地震监测预警研究与实践[J].煤炭学报,2010,35(6):900-903.JIANG Fu-xing,MIAO Xiao-hu,WANG Cun-wen,et al.Predicting research and practice of tectonic-controlled coal burst by microseismic monitoring[J].Journal of China Coal Society,2010,35(6):900-903.
[9]李铁,蔡美峰,纪洪广,等.强矿震预测的研究[J].北京科技大学学报,2005,27(3):260-263.LI Tie,CAI Mei-feng,JI Hong-guang,et al.Study on forecasting strong mining-induced earthquake[J].Journal of University of Science and Technology Beijing,2005,27(3):260-263.
[10]夏永学,康立军,齐庆新,等.基于微震监测的5个指标及其在冲击地压预测中的应用[J].煤炭学报,2010,35(12):2011-2016.XIA Yong-xue,KANG Li-jun,QI Qing-xin,et al.Five indexes of microseismic and their application in rock burst forecastion[J].Journal of China Coal Society,2010,35(12):2011-2016.
[11]巩思园.矿震震动波波速层析成像原理及其预测煤矿冲击危险应用实践[D].徐州:中国矿业大学,2010.
[12]LURKA A.Location of high seismic activity zones and seismic hazard assessment in Zabrze Bielszowice coal mine using passive tomography[J].China University of Mining&Technology,2008,18(2):177-181.
[13]SHARMA P.Geophysical methods in geology[M].New York:Elsevier,1986.
[14]WYLLIE R,GREGORY A,GARDNER G.An experimental investigation of factors affecting elastic wave veloicties in porous media[J].Geophysics,1958,23(3):459-493.
[15]TOKS?Z M,CHENG A C,TIMUR A.Velocities of seismic waves in porous rocks[J].Geophysics,1976,41(4):621-635.
[16]SEYA K,SUZUKI I,FUJIWARA H.The change in ultrasonic wave velocities in triaxially stressed brittle rock[J].Journal of Physics of the Earth,1979,27(5):409-421.
[17]NUR A,SIMMONS G.Stress-induced velocity anisotropy in rock:an experimental study[J].Journal of Geophysical Research,1969,74(27):6667-6674.
[18]方华,伍向阳,杨伟.岩石中裂纹对弹性波速度的影响[J].地球物理学进展,1998,13(3):79-83.FANG Hua,WU Xiang-yang,YANG Wei.The influences of cracks in compressional wave velocity[J].Progress in Geophysics,1998,13(3):79-83.
[19]郑贵平,赵兴东,刘建坡,等.岩石加载过程声波波速变化规律实验研究[J].东北大学学报(自然科学版),2009,30(8):1197-1200.ZHENG Gui-ping,ZHAO Xing-dong,LIU Jian-po,et al.Experimental study on change in acoustic wave velocity when rock is loading[J].Journal of Northeastern University(Natural Science),2009,30(8):1197-1200.
[20]宋丽莉,葛洪魁,王宝善.疏松砂岩弹性波速的实验研究[J].测井技术,2004,28(6):487-490.SONG Li-li,GE Hong-kui,WANG Bao-shan.Experimental study of unconsolidated sandstone’s elastic wave velocities[J].Well Logging Technology,2004,28(6):487-490.
[21]刘向君,刘洪,徐晓雷,等.低孔低渗砂岩加载条件下的声波传播特性实验研究[J].岩石力学与工程学报,2009,28(3):560-567.LIU Xiang-jun,LIU Hong,XU Xiao-lei,et al.Experimental research on acoustic wave propagation characteristic of low porosity and permeability sandstone under loading conditions[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(3):560-567.
[2]齐庆新,窦林名.冲击地压理论与技术[M].徐州:中国矿业大学出版社,2008.
[3]姜福兴,杨淑华,成云海,等.煤矿冲击地压的微地震监测研究[J].地球物理学报,2006,49(5):1511-1516.JIANG Fu-xing,YANG Shu-hua,CHENG Yun-hai,et al.A study on microseismic monitoring of rock burst in coal mine[J].Chinese Journal Geophysics,2006,49(5):1511-1516.
[4]李志华,窦林名,管向清,等.矿震前兆分区监测方法及应用[J].煤炭学报,2009,34(5):614-618.LI Zhi-hua,DOU Lin-ming,GUAN Xiang-qing,et al.A zoning monitoring method of microseismic premonition and its application[J].Journal of China Coal Society,2009,34(5):614-618.
[5]张明伟,窦林名,王占成,等.深井SOS微震监测系统建设与应用[J].煤矿开采,2010,15(2):16-20.ZHANG Ming-wei,DOU Lin-ming,WANG Zhan-cheng,et al.Construction and application of SOS micro-seismic monitoring system in deep mine[J].Coal Mining Technology,2010,15(2):16-20.
[6]窦林名,田京城,陆菜平,等.组合煤岩冲击破坏电磁辐射规律研究[J].岩石力学与工程学报,2005,24(19):3541-3544.DOU Lin-ming,TIAN Jing-cheng,LU Cai-ping,et al.Research on electromagnetic radiation rules of composed coal-rock burst failure[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(19):3541-3544.
[7]窦林名,王云海,何学秋,等.煤样变形破坏峰值前后电磁辐射特征研究[J].岩石力学与工程学报,2007,26(5):908-914.DOU Lin-ming,WANG Yun-hai,HE Xue-qiu,et al.Study on electromagnetic emission characteristic for coal sample deformation and failure during pre-and post-peaking phases[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):908-914.
[8]姜福兴,苗小虎,王存文,等.构造控制型冲击地压的微地震监测预警研究与实践[J].煤炭学报,2010,35(6):900-903.JIANG Fu-xing,MIAO Xiao-hu,WANG Cun-wen,et al.Predicting research and practice of tectonic-controlled coal burst by microseismic monitoring[J].Journal of China Coal Society,2010,35(6):900-903.
[9]李铁,蔡美峰,纪洪广,等.强矿震预测的研究[J].北京科技大学学报,2005,27(3):260-263.LI Tie,CAI Mei-feng,JI Hong-guang,et al.Study on forecasting strong mining-induced earthquake[J].Journal of University of Science and Technology Beijing,2005,27(3):260-263.
[10]夏永学,康立军,齐庆新,等.基于微震监测的5个指标及其在冲击地压预测中的应用[J].煤炭学报,2010,35(12):2011-2016.XIA Yong-xue,KANG Li-jun,QI Qing-xin,et al.Five indexes of microseismic and their application in rock burst forecastion[J].Journal of China Coal Society,2010,35(12):2011-2016.
[11]巩思园.矿震震动波波速层析成像原理及其预测煤矿冲击危险应用实践[D].徐州:中国矿业大学,2010.
[12]LURKA A.Location of high seismic activity zones and seismic hazard assessment in Zabrze Bielszowice coal mine using passive tomography[J].China University of Mining&Technology,2008,18(2):177-181.
[13]SHARMA P.Geophysical methods in geology[M].New York:Elsevier,1986.
[14]WYLLIE R,GREGORY A,GARDNER G.An experimental investigation of factors affecting elastic wave veloicties in porous media[J].Geophysics,1958,23(3):459-493.
[15]TOKS?Z M,CHENG A C,TIMUR A.Velocities of seismic waves in porous rocks[J].Geophysics,1976,41(4):621-635.
[16]SEYA K,SUZUKI I,FUJIWARA H.The change in ultrasonic wave velocities in triaxially stressed brittle rock[J].Journal of Physics of the Earth,1979,27(5):409-421.
[17]NUR A,SIMMONS G.Stress-induced velocity anisotropy in rock:an experimental study[J].Journal of Geophysical Research,1969,74(27):6667-6674.
[18]方华,伍向阳,杨伟.岩石中裂纹对弹性波速度的影响[J].地球物理学进展,1998,13(3):79-83.FANG Hua,WU Xiang-yang,YANG Wei.The influences of cracks in compressional wave velocity[J].Progress in Geophysics,1998,13(3):79-83.
[19]郑贵平,赵兴东,刘建坡,等.岩石加载过程声波波速变化规律实验研究[J].东北大学学报(自然科学版),2009,30(8):1197-1200.ZHENG Gui-ping,ZHAO Xing-dong,LIU Jian-po,et al.Experimental study on change in acoustic wave velocity when rock is loading[J].Journal of Northeastern University(Natural Science),2009,30(8):1197-1200.
[20]宋丽莉,葛洪魁,王宝善.疏松砂岩弹性波速的实验研究[J].测井技术,2004,28(6):487-490.SONG Li-li,GE Hong-kui,WANG Bao-shan.Experimental study of unconsolidated sandstone’s elastic wave velocities[J].Well Logging Technology,2004,28(6):487-490.
[21]刘向君,刘洪,徐晓雷,等.低孔低渗砂岩加载条件下的声波传播特性实验研究[J].岩石力学与工程学报,2009,28(3):560-567.LIU Xiang-jun,LIU Hong,XU Xiao-lei,et al.Experimental research on acoustic wave propagation characteristic of low porosity and permeability sandstone under loading conditions[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(3):560-567.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心