煤岩动力灾害电磁辐射预测技术中力电耦合方法的研究及应用
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摘要
对煤岩动力灾害电磁辐射预测技术的研究现状和发展趋势进行了论述与分析,基于煤岩变形破裂电磁辐射信号与受载时应力变化之间的关系,从FLAC应力场数值模拟与电磁辐射传播的角度对煤岩变形破裂电磁辐射力电耦合研究方法进行了研究。研究结果表明:基于FLAC模拟的力电耦合方法能合理地确定应力集中区域以及正确模拟电磁辐射在煤岩层内的分布规律,该方法为现场应用电磁辐射方法和技术准确预测预报煤岩灾害动力现象提供可靠的理论基础,对于完善煤岩变形破裂电磁辐射监测和检测理论以及促进相关学科的发展具有理论和现实意义。最后还对未来煤岩动力灾害电磁辐射预测技术研究的发展前景进行展望。
The present situation and progress trend of electro-magnetic emission(EME)prediction technology for rock or coal dynamical disasters are analyzed. On the basis of the relationship between EME signal and loading stress during deformation and fracture of coal or rock,the coupling methods between EME and stress are studied based on FLAC simulation for stress field and EME propagation. The results show that the coupling relationship can be expressed by thrice multinomial approximately. The electromagnetic emission signal will increase with the increase of loading stress,which approximately conforms to thrice multinomial. There are relatively large influences on the EME intensity or pulse in loading stress and loading speed. The higher the stress and loading speed are,the stronger the signal of electromagnetic emission produced is. The coupling results of calculation show that the EME signals increase with the increment of loading speed or the strength of coal or rock. The coupling method between EME and stress based on FLAC analogy can reliably ascertain the stress concentration fields,and properly simulate the distribution rules of EME signal in coal or rock stratum. It provides a kind of new approach to electromagnetic emission monitoring technology for the purpose of the application of monitoring EME to the prediction of dynamical disaster phenomena such as coal or rock outbursts. It can also provide reliably theoretical basis for the use of EME method and technology to predict and forecast rock or coal dynamical disasters. It has important meaning for perfecting the EME monitoring and detecting theory and promoting the related disciplines. Finally,a prospect for the research on the EME prediction technology for rock or coal dynamical disaster in the future is presented.
The present situation and progress trend of electro-magnetic emission(EME)prediction technology for rock or coal dynamical disasters are analyzed. On the basis of the relationship between EME signal and loading stress during deformation and fracture of coal or rock,the coupling methods between EME and stress are studied based on FLAC simulation for stress field and EME propagation. The results show that the coupling relationship can be expressed by thrice multinomial approximately. The electromagnetic emission signal will increase with the increase of loading stress,which approximately conforms to thrice multinomial. There are relatively large influences on the EME intensity or pulse in loading stress and loading speed. The higher the stress and loading speed are,the stronger the signal of electromagnetic emission produced is. The coupling results of calculation show that the EME signals increase with the increment of loading speed or the strength of coal or rock. The coupling method between EME and stress based on FLAC analogy can reliably ascertain the stress concentration fields,and properly simulate the distribution rules of EME signal in coal or rock stratum. It provides a kind of new approach to electromagnetic emission monitoring technology for the purpose of the application of monitoring EME to the prediction of dynamical disaster phenomena such as coal or rock outbursts. It can also provide reliably theoretical basis for the use of EME method and technology to predict and forecast rock or coal dynamical disasters. It has important meaning for perfecting the EME monitoring and detecting theory and promoting the related disciplines. Finally,a prospect for the research on the EME prediction technology for rock or coal dynamical disaster in the future is presented.
引文
[1]窦林名,何学秋.采矿地球物理学[M].北京:中国科学文化出版社,2002.(Dou Linming,He Xueqiu.Geophysics of Mining[M].Beijing:China Science and Culture Press,2002.(in Chinese))
[2]窦林名,何学秋.冲击矿压防治理论及技术[M].徐州:中国矿业大学出版社,2002.(Dou Linming,He Xueqiu.Theory and Technology of Rock Burst Prevention[M].Xuzhou:China University of Mining and Technology Press,2001.(in Chinese))
[3]何学秋,王恩元,聂百胜,等.煤岩流变电磁动力学[M].北京:科学出版社,2003.(He Xueqiu,Wang Enyuan,Nie Baisheng,et al.Electromagnetic Dynamics of Coal or Rock Rheology[M].Beijing:Science Press,2003.(in Chinese))
[4]Nie Baisheng,He Xueqiu,Wang Enyuan,et al.Macro and micro-mechanism of effect of EME on CBM adsorption in coal[A].In:Proc.the1st Mine Environment and Ventilation Symposium[C].India:Science Press,2000.121–128.
[5]He Xueqiu,Wang Enyuan,Liu Zhentang.Experimental study on the electromagnetic radiation(EMR)during the fracture of coal or rock[A].In:Proceedings of the′99International Symposium on Mining Science and Technology[C].Beijing:Science Press,1999.133–136.
[6]石显鑫,蔡栓荣,冯宏,等.利用声发射技术预测预报煤与瓦斯突出[J].煤田地质与勘探,1998,26(3):60–65.(Shi Xianxin,Cai Shuanrong,Feng Hong,et al.The prediction of coal and gas outburst using the acoustic emission technique[J].Coal Geology and Exploration,1998,26(3):60–65.(in Chinese))
[7]苏文叔.利用瓦斯涌出动态指标预测煤与瓦斯突出[J].煤炭工程师,1996,(5):1–7.(Su Wenshu.Probing into the prediction of coal and gas outburst with dynamic index of gas emission[J].Coal Engineer,1996,(5):1–7.(in Chinese))
[8]马玉虎,王培玲,吴红岩.电磁辐射与孕震过程的初探[J].高原地震,2001,13(3):24–30.(Ma Yuhu,Wang Peilin,Wu Hongyan.Preliminary discussion on electromagnetic radiation and seismogenic process[J].Plateau Earthquake Research,2001,13(3):24–30.(in Chinese))
[9]熊皓.地震电磁辐射研究的新进展[J].地震学报,1991,13(2):254–258.(Xiong Hao.New progress in electromagnetic radiation research of earthquake[J].Acta Seismologica Sinica,1991,13(2):254–258.(in Chinese))
[10]郭自强,尤俊汉,李高,等.破裂岩石的电子发射和压缩原子模型[J].地球物理学报,1989,32(2):173–177.(Guo Ziqiang,You Junhan,Li Gao,et al.Model of electron emission and compressed atom for fractured rock[J].Chinese Journal of Geophysics,1989,32(2):173–177.(in Chinese))
[11]何学秋,刘明举.含瓦斯煤岩破坏电磁动力学[M].徐州:中国矿业大学出版社,1995.(He Xueqiu,Liu Mingju.Fracture Electromagnetic Dynamics of Coal or Rock Containing Gas[M].Xuzhou:China University of Mining and Technology Press,1995.(in Chinese))
[12]王恩元,何学秋.煤岩变形破裂电磁辐射的试验研究[J].地球物理学报,2000,43(1):131–137.(Wang Enyuan,He Xueqiu.An experimental study of the electromagnetic emission during the deformation and fracture of coal or rock[J].Chinese Journal of Geophysics,2000,43(1):131–137.(in Chinese))
[13]窦林名.煤岩突变的声电效应规律及其应用研究[博士后研究工作报告][R].徐州:中国矿业大学,2001.(Dou Linming.Study on theeffect and application of AE and EME of coal or rock mutation[Postdoctoral Report][R].Xuzhou:China University of Mining and Technology,2001.(in Chinese))
[14]聂白胜.含瓦斯煤岩破裂力电效应的机制研究[博士学位论文][D].徐州:中国矿业大学,2001.(Nie Baisheng.Research on mechanism of stress-electric effect during the fracture of coal or rock containing gas[Ph.D.Thesis][D].Xuzhou:China University of Mining and Technology,2001.(in Chinese))
[15]钱建生,何学秋,王恩元,等.煤岩破裂过程电磁波传播特性的分析[J].煤炭学报,1999,24(4):392–394.(Qian Jiansheng,He Xueqiu,Wang enyuan,et al.Analysis of electromagnetic wave′s propagating characteristic process of coal rock outbursts[J].Journal of China Coal Society,1999,24(4):392–394.(in Chinese))
[16]肖红飞.煤岩变形破裂电磁辐射与应力耦合规律研究[博士学位论文][D].徐州:中国矿业大学,2003.(Xiao Hongfei.Research on the coupling laws between EME and stress during the fracture of coal or rock[Ph.D.Thesis][D].Xuzhou:China University of Mining and Technology,2003.(in Chinese))
[17]董积平,高攸纲.有限移动源的电磁波辐射[J].北京邮电大学学报,2001,24(3):89–92.(Dong Jiping,Gao Yougang.Electro-magnetic radiation of the finite moving source[J].Journal of Beijing University of Posts and Telecommunications,2001,24(3):89–92.(in Chinese))
[2]窦林名,何学秋.冲击矿压防治理论及技术[M].徐州:中国矿业大学出版社,2002.(Dou Linming,He Xueqiu.Theory and Technology of Rock Burst Prevention[M].Xuzhou:China University of Mining and Technology Press,2001.(in Chinese))
[3]何学秋,王恩元,聂百胜,等.煤岩流变电磁动力学[M].北京:科学出版社,2003.(He Xueqiu,Wang Enyuan,Nie Baisheng,et al.Electromagnetic Dynamics of Coal or Rock Rheology[M].Beijing:Science Press,2003.(in Chinese))
[4]Nie Baisheng,He Xueqiu,Wang Enyuan,et al.Macro and micro-mechanism of effect of EME on CBM adsorption in coal[A].In:Proc.the1st Mine Environment and Ventilation Symposium[C].India:Science Press,2000.121–128.
[5]He Xueqiu,Wang Enyuan,Liu Zhentang.Experimental study on the electromagnetic radiation(EMR)during the fracture of coal or rock[A].In:Proceedings of the′99International Symposium on Mining Science and Technology[C].Beijing:Science Press,1999.133–136.
[6]石显鑫,蔡栓荣,冯宏,等.利用声发射技术预测预报煤与瓦斯突出[J].煤田地质与勘探,1998,26(3):60–65.(Shi Xianxin,Cai Shuanrong,Feng Hong,et al.The prediction of coal and gas outburst using the acoustic emission technique[J].Coal Geology and Exploration,1998,26(3):60–65.(in Chinese))
[7]苏文叔.利用瓦斯涌出动态指标预测煤与瓦斯突出[J].煤炭工程师,1996,(5):1–7.(Su Wenshu.Probing into the prediction of coal and gas outburst with dynamic index of gas emission[J].Coal Engineer,1996,(5):1–7.(in Chinese))
[8]马玉虎,王培玲,吴红岩.电磁辐射与孕震过程的初探[J].高原地震,2001,13(3):24–30.(Ma Yuhu,Wang Peilin,Wu Hongyan.Preliminary discussion on electromagnetic radiation and seismogenic process[J].Plateau Earthquake Research,2001,13(3):24–30.(in Chinese))
[9]熊皓.地震电磁辐射研究的新进展[J].地震学报,1991,13(2):254–258.(Xiong Hao.New progress in electromagnetic radiation research of earthquake[J].Acta Seismologica Sinica,1991,13(2):254–258.(in Chinese))
[10]郭自强,尤俊汉,李高,等.破裂岩石的电子发射和压缩原子模型[J].地球物理学报,1989,32(2):173–177.(Guo Ziqiang,You Junhan,Li Gao,et al.Model of electron emission and compressed atom for fractured rock[J].Chinese Journal of Geophysics,1989,32(2):173–177.(in Chinese))
[11]何学秋,刘明举.含瓦斯煤岩破坏电磁动力学[M].徐州:中国矿业大学出版社,1995.(He Xueqiu,Liu Mingju.Fracture Electromagnetic Dynamics of Coal or Rock Containing Gas[M].Xuzhou:China University of Mining and Technology Press,1995.(in Chinese))
[12]王恩元,何学秋.煤岩变形破裂电磁辐射的试验研究[J].地球物理学报,2000,43(1):131–137.(Wang Enyuan,He Xueqiu.An experimental study of the electromagnetic emission during the deformation and fracture of coal or rock[J].Chinese Journal of Geophysics,2000,43(1):131–137.(in Chinese))
[13]窦林名.煤岩突变的声电效应规律及其应用研究[博士后研究工作报告][R].徐州:中国矿业大学,2001.(Dou Linming.Study on theeffect and application of AE and EME of coal or rock mutation[Postdoctoral Report][R].Xuzhou:China University of Mining and Technology,2001.(in Chinese))
[14]聂白胜.含瓦斯煤岩破裂力电效应的机制研究[博士学位论文][D].徐州:中国矿业大学,2001.(Nie Baisheng.Research on mechanism of stress-electric effect during the fracture of coal or rock containing gas[Ph.D.Thesis][D].Xuzhou:China University of Mining and Technology,2001.(in Chinese))
[15]钱建生,何学秋,王恩元,等.煤岩破裂过程电磁波传播特性的分析[J].煤炭学报,1999,24(4):392–394.(Qian Jiansheng,He Xueqiu,Wang enyuan,et al.Analysis of electromagnetic wave′s propagating characteristic process of coal rock outbursts[J].Journal of China Coal Society,1999,24(4):392–394.(in Chinese))
[16]肖红飞.煤岩变形破裂电磁辐射与应力耦合规律研究[博士学位论文][D].徐州:中国矿业大学,2003.(Xiao Hongfei.Research on the coupling laws between EME and stress during the fracture of coal or rock[Ph.D.Thesis][D].Xuzhou:China University of Mining and Technology,2003.(in Chinese))
[17]董积平,高攸纲.有限移动源的电磁波辐射[J].北京邮电大学学报,2001,24(3):89–92.(Dong Jiping,Gao Yougang.Electro-magnetic radiation of the finite moving source[J].Journal of Beijing University of Posts and Telecommunications,2001,24(3):89–92.(in Chinese))
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