震动波在煤岩介质中传播特性的模拟研究
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摘要
利用FLAC3D数值模拟软件的Dynamic模块,将井下实测的一次冲击矿压信号作为震源,模拟研究了冲击震动波在不同煤岩介质中的传播特性,取得了如下主要结论:①震动波在煤岩层中的衰减与传播距离呈乘幂关系,且垂直方向的衰减指数要大于水平方向的衰减指数。②弱岩层结构对震动波的传播起到了很好的能量衰减作用,岩性越弱,厚度越大,震动波的衰减越显著。③弱岩层结构距离巷道顶板越近,对震动波的衰减效果越明显。此外,通过现场工程实践验证了震动波在弱岩层结构中传播的衰减效应。
Based on the dynamic module of FLAC3D numerical simulation software,and using the rockburst shock wave signal measured in filed as the source,the propagation characters of shock wave in different coal and rock medium was simulated and the achieved results are as follows:① the attenuation of shock wave propagation in coal and rock strata has a power relation with distance,and the vertical-directional attenuation index is greater than it of horizontal direction.② The weak rock structure plays a positive role for the energy attenuation of shock wave propagating.The weaker the lithology is,and the thicker the weak rock thickness is,the shock wave attenuation will be more significant.③ The closer the weak structure distances from the roadway roof,the more significant the attenuation effect of shock wave is.In addition,the attenuation effect of shock wave propagating in the weak rock structure is validated through on-site engineering practice.These conclusions provide certain theoretical basis for preventing the impact fracture of roadway from shock wave.
Based on the dynamic module of FLAC3D numerical simulation software,and using the rockburst shock wave signal measured in filed as the source,the propagation characters of shock wave in different coal and rock medium was simulated and the achieved results are as follows:① the attenuation of shock wave propagation in coal and rock strata has a power relation with distance,and the vertical-directional attenuation index is greater than it of horizontal direction.② The weak rock structure plays a positive role for the energy attenuation of shock wave propagating.The weaker the lithology is,and the thicker the weak rock thickness is,the shock wave attenuation will be more significant.③ The closer the weak structure distances from the roadway roof,the more significant the attenuation effect of shock wave is.In addition,the attenuation effect of shock wave propagating in the weak rock structure is validated through on-site engineering practice.These conclusions provide certain theoretical basis for preventing the impact fracture of roadway from shock wave.
引文
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[18]陆菜平.组合煤岩的强度弱化减冲原理及其应用[D].徐州:中国矿业大学,2008.Lu Caiping.Intensity weakening theory for rockburst of compoundcoal-rock and its application[D].Xuzhou:China University of Min-ing and Technology,2008.
[19]陈国祥,窦林名,高明仕,等.动力挠动对回采巷道冲击危险的数值模拟[J].采矿与安全工程学报,2009,26(2):153-157.Chen Guoxiang,Dou Linming,Gao Mingshi,et al.Numerical simu-lation of dynamic vibration affecting rock burst in mining gatewaycaused by tremor[J].Journal of Mining and Safety Engineering,2009,26(2):153-157.
[20]李世愚,唐林波,刘建新,等.地震前低频事件的实验研究[J].地震地磁观测与研究,2002,23(4):1-7.Li Shiyu,Tang Linbo,Liu Jianxin,et al.Experimental investigationof precursory low-frequency events before strong earthquakes[J].Seismological and Geomagnetic Observation and Research,2002,23(4):1-7.
[21]陆菜平,窦林名,吴兴荣,等.岩体微震监测的频谱分析与信号识别[J].岩土工程学报,2005,27(7):772-775.Lu Caiping,Dou Linming,Wu Xingrong,et al.Frequency spectrumanalysis on microseismic monitoring and signal differentiation ofrock material[J].Chinese Journal of Geotechnical Engineering,2005,27(7):772-775.
[22]陆菜平,窦林名,吴兴荣,等.煤岩冲击前兆微震频谱演变规律的试验与实证研究.岩石力学与工程学报,2007,27(3):519-525.Lu Caiping,Dou Linming,Wu Xingrong,et al.Experimental andempirical research on frequency-spectrum evolvement rule of rock-burst precursory microseismic signals of coal-rock[J].ChineseJournal of Rock Mechanics and Engineering,2007,27(3):519-525.
[2]Goszcz,Antonl.Roof rock burst s and ways to combat them[J].Archiwum Gornictwa,1991,36(3):239-261.
[3]Huwe.Untersuchung der geologischen Einflussfaktoren auf die Ge-birgsschlaggefahr[J].Glueckauf Forschungshefte,1998,59(3):72-76.
[4]李希勇,张修峰.典型深部重大冲击地压事故原因分析及防治对策[J].煤炭科学技术,2003,31(2):15-17.Li Xiyong,Zhang Xiufeng.Accident cause analysis and preventionmeasures of typical deep mine heavy pressure bump[J].Coal Sci-ence and Technology,2003,31(2):15-17.
[5]牟宗龙,窦林名,张广文,等.坚硬顶板型冲击矿压灾害防治研究[J].中国矿业大学学报,2006,35(6):737-741.Mou Zonglong,Dou Linming,Zhang Guangwen,et al.Study of pre-vention methods of rock burst disaster caused by hard rock roof[J].Journal of China University of Mining and Technology,2006,35(6):737-741.
[6]吴文,徐松林,杨春和,等.盐岩冲击特性试验研究[J].岩石力学与工程学报,2004,23(21):3 613-3 620.Wu Wen,Xu Songlin,Yang Chunhe,et al.Testing studies on re-sponse behaviour of rocksalt to impacting[J].Chinese Journal ofRock Mechanics and Engineering,2004,23(21):3 613-3 620.
[7]寇绍金,虞吉林,杨根宏.石灰岩中应力波衰减机制的试验研究[J].力学学报,1982,14(6):583-588.Kou Shaojin,Yu Jilin,Yang Genhong.Testing studies on attenuationmechanics of stress wave in limestone[J].Journal of Mechanics,1982,14(6):583-588.
[8]Goldsmith W,Polivka M,Yang T.Dynamic behaviour of concrete[J].Experimental Mechanics,1966,6(2):65-69.
[9]Grady D E,Kipp M E.The micromechanics of impact fracture of rock[J].International Journal of Rock Mechanics and Mining Sciencesand Geomechanics Abstracts,1979,16(6):293-302.
[10]李夕兵,陈寿如,古德生.岩石在不同加载波下的动载强度[J].中南矿冶学院学报,1994,25(3):301-304.Li Xibing,Chen Shouru,Gu Desheng.Dynamic strength of rock un-der impulse loads with different stress waveforms and durations[J].Journal of Central-south Institute of Mining and Metallurgy,1994,25(3):301-304.
[11]高明仕,窦林名,张农,等.岩土介质中冲击震动波传播规律的微震试验研究[J].岩石力学与工程学报,2007,26(7):1 365-1 371.Gao Mingshi,Dou Linming,Zhang Nong,et al.Experimental studyon earthquake tremor for transmitting law of rockburst in geomateri-als[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(7):1 365-1 371.
[12]叶根喜,姜福兴,郭延华,等.煤矿深部采场爆破地震波传规律的微震原位试验研究[J].岩石力学与工程学报,2008,27(5):1 053-1 058.Ye Genxi,Jiang Fuxing,Guo Yanhua,et al.Experimental researchon seismic wave attenuation by field microseismic monitoring in adeep coal mine[J].Chinese Journal of Rock Mechanics and Engi-neering,2008,27(5):1 053-1 058.
[13]闫长斌,徐国元,李夕兵.爆破震动对采空区稳定性影响的FLAC3D分析[J].岩石力学与工程学报,2005,24(16):2 894-2 899.Yan Changbin,Xu Guoyuan,Li Xibing.Stability analysis of minedout areas influenced by blasting vibration with FLAC3D[J].Chi-nese Journal of Rock Mechanics and Engineering,2005,24(16):2 894-2 899.
[14]陈占军,朱传云,周小恒.爆破荷载作用下岩石边坡动态响应的FLAC3D模拟研究[J].爆破,2005,22(4):8-13.Chen Zhanjun,Zhu Chuanyun,Zhou Xiaoheng.FLAC3D simulationfor dynamic response of rock slope under explosion[J].Blasting,2005,22(4):8-13.
[15]卢爱红.应力波诱发冲击矿压的动力学机理研究[D].徐州:中国矿业大学,2005.Lu Aihong,Study on dynamic mechanism of rock burst induced bystress wave[D].Xuzhou:China University of Mining and Technolo-gy,2005.
[16]雷光宇,卢爱红,茅献彪.应力波作用下巷道层裂破坏的数值模拟研究[J].岩土力学,2005,26(9):1 477-1 480.Lei Guangyu,Lu Aihong,Mao Xianbiao.Numerical simulation onlayered crack and failure of roadway under stress wave[J].Rockand Soil Mechanics,2005,26(9):1 477-1 480.
[17]高明仕.冲击矿压巷道围岩的强弱强结构控制机理研究[D].徐州:中国矿业大学,2006.Gao Mingshi.Study on the strong-soft-strong structure control mech-anism of roadway subjected to rock burst[D].Xuzhou:China Uni-versity of Mining and Technology,2006.
[18]陆菜平.组合煤岩的强度弱化减冲原理及其应用[D].徐州:中国矿业大学,2008.Lu Caiping.Intensity weakening theory for rockburst of compoundcoal-rock and its application[D].Xuzhou:China University of Min-ing and Technology,2008.
[19]陈国祥,窦林名,高明仕,等.动力挠动对回采巷道冲击危险的数值模拟[J].采矿与安全工程学报,2009,26(2):153-157.Chen Guoxiang,Dou Linming,Gao Mingshi,et al.Numerical simu-lation of dynamic vibration affecting rock burst in mining gatewaycaused by tremor[J].Journal of Mining and Safety Engineering,2009,26(2):153-157.
[20]李世愚,唐林波,刘建新,等.地震前低频事件的实验研究[J].地震地磁观测与研究,2002,23(4):1-7.Li Shiyu,Tang Linbo,Liu Jianxin,et al.Experimental investigationof precursory low-frequency events before strong earthquakes[J].Seismological and Geomagnetic Observation and Research,2002,23(4):1-7.
[21]陆菜平,窦林名,吴兴荣,等.岩体微震监测的频谱分析与信号识别[J].岩土工程学报,2005,27(7):772-775.Lu Caiping,Dou Linming,Wu Xingrong,et al.Frequency spectrumanalysis on microseismic monitoring and signal differentiation ofrock material[J].Chinese Journal of Geotechnical Engineering,2005,27(7):772-775.
[22]陆菜平,窦林名,吴兴荣,等.煤岩冲击前兆微震频谱演变规律的试验与实证研究.岩石力学与工程学报,2007,27(3):519-525.Lu Caiping,Dou Linming,Wu Xingrong,et al.Experimental andempirical research on frequency-spectrum evolvement rule of rock-burst precursory microseismic signals of coal-rock[J].ChineseJournal of Rock Mechanics and Engineering,2007,27(3):519-525.
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