煤系岩石脆性破坏临界电磁辐射信息分析
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摘要
根据煤系岩石加载破坏过程中的电磁辐射信息与其受载变形破坏过程的相关关系,分析了煤系岩石脆性破裂前的电磁辐射信号突增现象.通过试验数据和用岩石破坏重整化群理论系统研究岩石破裂前临界点的电磁辐射信息识别条件.单轴荷载条件下,临界点对应的应力和岩石峰值应力比值在其临界比大都在70%与80%之间,均值75%左右,误差在±9%以内,表明岩石内部微裂纹的形成与原有裂纹的扩展是电磁辐射活动的主要原因.上述研究可为煤岩动力灾害防治提供有力的依据.
It was analyzed the sudden increase of electromagnetic counts and emission before the rock brittle failure,and obtained the relationship between electromagnetic emission and rock compression process under loading,which was based on renormalization group theory.Combining rock uniaxial compression results,it was shown that the stress ratio between the electromagnetic emission of critical state and peaking state had a value range 70% to 80%.According to the test data,it could get that the stress ratio between critical point,had a value of nearly to 75%,and the deviation was less than ±9%,which was reveal that the micro-crack expansion was the main causes of electromagnetic radiation.This research result provides the prevention basis for the coal or rock dynamic disaster.
It was analyzed the sudden increase of electromagnetic counts and emission before the rock brittle failure,and obtained the relationship between electromagnetic emission and rock compression process under loading,which was based on renormalization group theory.Combining rock uniaxial compression results,it was shown that the stress ratio between the electromagnetic emission of critical state and peaking state had a value range 70% to 80%.According to the test data,it could get that the stress ratio between critical point,had a value of nearly to 75%,and the deviation was less than ±9%,which was reveal that the micro-crack expansion was the main causes of electromagnetic radiation.This research result provides the prevention basis for the coal or rock dynamic disaster.
引文
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[15]李忠辉,王恩元,刘贞堂,等.煤岩破坏表面电位特征规律研究[J].中国矿业大学学报,2009,38(2):187-192Li Zhonghui,Wang Enyuan,Liu Zhentang,et al.Study on characteristics and rules of surface potential during coalfracture[J].Journal of China University of Mining&Technology,2009,38(2):187-192
[16]宋晓艳.煤岩物性的电磁辐射响应特征与机制研究[D].徐州:中国矿业大学博士论文,2009Song Xiaoyan.Study on characteristics and mechanism of electromagnetic radiation response to physical and mechanicalproperties of coal or rock[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2009
[17]陈文学.煤岩细观损伤电磁辐射理论模型及应用研究[D].北京:中国矿业大学博士论文,2009Chen Wenxue.Study on electromagnetic emission theory model of coal-rock meso-scale damage and application in coalmines[D].Beijing:Ph.D.Thesis,China University of Mining&Technology,2009
[18]贾慧霖.受载煤岩变形破裂低频电磁信号规律特征与机理研究[D].徐州:中国矿业大学博士论文,2010Jia Huilin.Study on regularity and mechanism of low-frequency electromagnetic signals in deformation and fracture ofcoal amd rock under load[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2010
[19]王云刚.受载煤体变形破裂微波辐射规律及其机理的基础研究[D].徐州:中国矿业大学博士论文,2008Wang Yungang.Basic study on microwave radiation rules and its mechanism of loading coal in deformation and fractureprocess[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2008
[20]Bieniawski Z T.Time-dependent behaviour of fractured rock[J].Rock Mechanics and Rock Engineering,1970,2(3):123-127
[21]秦四清,徐锡伟,胡平,等.孕震断层的多锁固段脆性破裂机制与地震预测新方法的探索[J].地球物理学报,2010,53(4):1001-1014Qin Siqing,Xu Xiwei,Hu Ping,et al.Brittle failure mechanism of multiple locked patches in a seismogenic fault systemand exploration on a new way foe earthquake prediction[J].Chinses Journal of Geophysics,2010,53(4):1001-1014
[22]秦四清,王媛媛,马平.崩滑灾害临界位移演化的指数律[J].岩石力学与工程学报,2010,29(15):873-880Qin Siqing,Wang Yuanyuan,Ma Ping.Expoential laws of critical displacement evolution for landslides and avalanches[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(15):873-880
[23]Martin C D.The strength of massive Lac du Bonnet granite around underground openings[D].The United States:University of Manitoba,1993
[24]Hudson J A,Fairhurst C.Tensile strength,Weibull’s theory and a general statistical approach to rock failure[C].TheProceedings of the Southampton 1969 Civil Engineering Materials Conference,1969:901-914
[25]Qin Siqing,Jiao Jiu Jimmy,Li Zhigang.Nonlinear evolutionary mechanisms of instability of plane-shear slope:catastrophe,bifurcation,chaos and physical prediction[J].Rock Mechanics and Rock Engineering,2006,39(1):59-76
[26]薛雷.岩石破裂逾渗临界状态重正化群研究及应用[D].北京:中国科学院地质与地球物理研究所博士论文,2011Xue Lei.Renormalization study of percolation critical state in rock failure[D].Beijing:Ph.D.Thesis,Institute ofGeology and Geophysics Chinese Academy of Sciences,2011
[2]张晓春,杨挺青,缪协兴.岩石裂纹演化及其力学特性的研究进展[J].力学进展,1999,29(1):97-104Zhang Xiaochun,Yang Tingqing,Miao Xiexing.The new adavabces of cracks development and mechanical properties ofrock[J].Advacncea in Mechanics,1999,29(1):97-104
[3]王恩元,何学秋,刘贞堂,等.煤岩变形破裂的电磁辐射规律及其应用研究[J].中国安全科学学报,2000,10(2):35-39Wang Enyuan,He Xueqiu,Liu Zhentang,et al.The regularity electromagnetic radiation of coal or rock under load andits application[J].China Safety Science Journal,2000,10(2):35-39
[4]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):131-137Wang Enyuan,He Xueqiu.An experimental study on the electromagnetic emission suring the deformation and fracture ofcoal or rock[J].Chinese Journal of Geophysics,2000,43(1):131-137
[5]Cress G O,Brady B T,Rowell G A.Sources of electromagnetic radiation form fracture of rock samples in laboratory[J].Geophys Res Lett,1987,(14):331-334
[6]Brady B T,Rowell G A.Laboratory investigation of the electrodynamics of rock fracture[J].Nature,1986,321:488-492
[7]郭自强,刘斌.岩石破裂电磁辐射的频率特征[J].地球物理学报,1995,38(2):221-226Guo Ziqiang,Liu Bin.Frequency properties of electromagnetic emission associated with microscopic cracking in rocks[J].Acta Geophysica Sinica,1995,38(2):221-226
[8]郭自强,周大庄,施行觉,等.岩石破裂过程中的光电效应[J].地球物理学报,1988,31(1):37-41Guo Ziqiang,Zhou Dazhuang,Shi Xingjue,et al.The effects of light and acoustic emission during rock fracture[J].Acta Geophysica Sinica,1988,31(1):37-41
[9]徐为民,童芜生,吴培稚.岩石破裂过程中电磁辐射的实验研究[J].地球物理学报,1985,28(2):181-190Xu Weimin,Tong Wusheng,Wu Peizhi.Experimental study of electromagnetic emission during rock fracture[J].ActaGeophysica Sinica,1985,28(2):181-190
[10]李艳娜,王恩元,赵恩来.单轴压力下煤样表面电位试验[J].煤炭学报,2009,34(6):806-809Li Yanna,Wang Enyuan,Zhao Enlai.Experiment on surface potential of coal under uniaxial compression[J].Journal ofChina Coal Society,2009,34(6):806-809
[11]张世杰.煤岩破坏电磁辐射特性及信号分析处理技术研究[D].北京:中国矿业大学博士论文,2009Zhang Shijie.Research on characteristics and signal anlysis and processing technology of electromagnetic emission infracture of coal-rock[D].Beijing:Ph.D.Thesis,China University of Mining&Technology,2009
[12]欧建春.煤与瓦斯突出演化过程模拟实验室研究[D].徐州:中国矿业大学博士论文,2012Ou Jianchun.Study on simulation experiments of coal can gas outburst evolution[D].Xuzhou:Ph.D.Thesis,ChinaUniversity of Mining&Technology,2012
[13]刘晓斐.冲击地压电磁辐射前兆信息的时间序列数据挖掘及群体识别体系研究[D].徐州:中国矿业大学博士论文,2008Liu Xiaofei.Study on time series data mining and group recogition system of electromagnetic precursor information ofrock burst[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2008
[14]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):908-914Dou Linming,Wang Yunhai,He Xueqiu,et al.Study on electromagentic emission characteristic for coal sampledeformation and failure during pre-and post-peaking phases[J].China Journal of Rock Mechanics and Engineeringl,2007,26(5):908-914
[15]李忠辉,王恩元,刘贞堂,等.煤岩破坏表面电位特征规律研究[J].中国矿业大学学报,2009,38(2):187-192Li Zhonghui,Wang Enyuan,Liu Zhentang,et al.Study on characteristics and rules of surface potential during coalfracture[J].Journal of China University of Mining&Technology,2009,38(2):187-192
[16]宋晓艳.煤岩物性的电磁辐射响应特征与机制研究[D].徐州:中国矿业大学博士论文,2009Song Xiaoyan.Study on characteristics and mechanism of electromagnetic radiation response to physical and mechanicalproperties of coal or rock[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2009
[17]陈文学.煤岩细观损伤电磁辐射理论模型及应用研究[D].北京:中国矿业大学博士论文,2009Chen Wenxue.Study on electromagnetic emission theory model of coal-rock meso-scale damage and application in coalmines[D].Beijing:Ph.D.Thesis,China University of Mining&Technology,2009
[18]贾慧霖.受载煤岩变形破裂低频电磁信号规律特征与机理研究[D].徐州:中国矿业大学博士论文,2010Jia Huilin.Study on regularity and mechanism of low-frequency electromagnetic signals in deformation and fracture ofcoal amd rock under load[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2010
[19]王云刚.受载煤体变形破裂微波辐射规律及其机理的基础研究[D].徐州:中国矿业大学博士论文,2008Wang Yungang.Basic study on microwave radiation rules and its mechanism of loading coal in deformation and fractureprocess[D].Xuzhou:Ph.D.Thesis,China University of Mining&Technology,2008
[20]Bieniawski Z T.Time-dependent behaviour of fractured rock[J].Rock Mechanics and Rock Engineering,1970,2(3):123-127
[21]秦四清,徐锡伟,胡平,等.孕震断层的多锁固段脆性破裂机制与地震预测新方法的探索[J].地球物理学报,2010,53(4):1001-1014Qin Siqing,Xu Xiwei,Hu Ping,et al.Brittle failure mechanism of multiple locked patches in a seismogenic fault systemand exploration on a new way foe earthquake prediction[J].Chinses Journal of Geophysics,2010,53(4):1001-1014
[22]秦四清,王媛媛,马平.崩滑灾害临界位移演化的指数律[J].岩石力学与工程学报,2010,29(15):873-880Qin Siqing,Wang Yuanyuan,Ma Ping.Expoential laws of critical displacement evolution for landslides and avalanches[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(15):873-880
[23]Martin C D.The strength of massive Lac du Bonnet granite around underground openings[D].The United States:University of Manitoba,1993
[24]Hudson J A,Fairhurst C.Tensile strength,Weibull’s theory and a general statistical approach to rock failure[C].TheProceedings of the Southampton 1969 Civil Engineering Materials Conference,1969:901-914
[25]Qin Siqing,Jiao Jiu Jimmy,Li Zhigang.Nonlinear evolutionary mechanisms of instability of plane-shear slope:catastrophe,bifurcation,chaos and physical prediction[J].Rock Mechanics and Rock Engineering,2006,39(1):59-76
[26]薛雷.岩石破裂逾渗临界状态重正化群研究及应用[D].北京:中国科学院地质与地球物理研究所博士论文,2011Xue Lei.Renormalization study of percolation critical state in rock failure[D].Beijing:Ph.D.Thesis,Institute ofGeology and Geophysics Chinese Academy of Sciences,2011
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