单轴压力下煤样表面电位实验
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摘要
建立了煤岩变形破裂过程表面电位测试实验系统,研究了不同试样单轴压力下变形破裂过程中的表面电位特征规律.结果表明,原煤、型煤和混凝土在受单轴压力变形破裂过程中都有表面电位产生,并且表面电位在整个变形破裂过程中始终存在.从总体上看,表面电位和载荷的变化趋势一致;载荷突变时,表面电位信号也出现突变,表面电位的突变幅度和载荷的突变幅度成正相关.
The experimental system for collecting surface potential was founded.The research was made on the characteristic of surface potential signal during the deformation and fracture of coal and concrete.The results show that surface potential signal generates during the process and exists during the whole deformation and fracture of coal and concrete.As a whole,the change tendency of the surface potential with the load is the same.When there is a break in load,the surface potential signal will change as well and the break extent of the surface potential and the load are positive correlation.
The experimental system for collecting surface potential was founded.The research was made on the characteristic of surface potential signal during the deformation and fracture of coal and concrete.The results show that surface potential signal generates during the process and exists during the whole deformation and fracture of coal and concrete.As a whole,the change tendency of the surface potential with the load is the same.When there is a break in load,the surface potential signal will change as well and the break extent of the surface potential and the load are positive correlation.
引文
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[14]郝锦绮,刘力强,龙海丽,等.双轴压力下岩样自电位变化实验的新结果[J].地球物理学报,2004,47(3):475-482.Hao Jinqi,Liu Liqiang,Long Haili,et al.Newresult of the experiment on self-potential change of rocks under biaxial com-pression[J].Chinese J.Geo-phys.,2004,47(3):475-482.
[2]王佑安,吴继周,杨思敬,等.煤矿安全手册[M].北京:煤炭工业出版社,1994.
[3]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.
[4]王恩元.含瓦斯煤破裂的电磁辐射和声发射效应及其应用研究[D].徐州:中国矿业大学,1997.Wang Enyuan.EMR and AE and application of fracture of gassy coal or rock[D].Xuzhou:China University of Mining andTechnology,1997.
[5]АбдуппабекоВКН.地壳中的电现象[M].北京:学术期刊出版社,1990.АбдуппабекоВКН.Electricity phenomenon in lithosphere[M].Beijing:Science Journal Press,1990.
[6]孙正江,王丽华,高宏.岩石标本破裂时的电磁辐射和光发射[J].地球物理学报,1986,29(5):491-495.Sun Zhengjiang,Wang Lihua,Gao Hong.EMR and AE of fracture of rock sample[J].Acta Geophysica Sinica,1986,29(5):491-495.
[7]Cress G O,Brady B T.Sources of electromagnetic radiation from fracture of rock samples in laboratory[J].Geophys.Res.Lett.,1987,14(4):331-334.
[8]郭自强,周大庄,施行觉,等.岩石破裂中的光声效应[J].地球物理学报,1988,31(1):37-41.Guo Ziqiang,Zhou Dazhuang,Shi Xingjue,et al.The effects of light and acoustic emission during rock fracture[J].ActaGeophysica Sinica,1988,31(1):37-41.
[9]郭自强,周大庄,施行觉,等.岩石破裂中的电子发射[J].地球物理学报,1988,31(5):566-571.Guo Ziqiang,Zhou Dazhuang,Shi Xingjue,et al.Electron emission during rock fracture[J].Acta Geophysica Sinica,1988,31(5):566-571.
[10]郭自强,尤峻汉,李高,等.岩石破裂的电子发射与压缩电子模型[J].地球物理学报,1989,32(2):173-177.Guo Ziqiang,You Junhan,Li Gao,et al.The model of compressed atoms and electron emission of rock fracture[J].ActaGeophysica Sinica,1989,32(2):173-177.
[11]Poturayev V N,Bulat A F.Combined detection of electromagnetic and acoustic emission associated with rock failure[J].Transactions(Doklady)of the USSR Academy of Sciences:Earth Science Sections,1989,308(5):86-89.
[12]ХатиашвилиHГ.论碱性卤素结晶体和岩石中裂隙形成时的电磁效应[A].地震地电学论文集[C],北京:地震出版社,1989:149-158.ХатиашвилиHГ.EMR effect during fracture deformation of alkaline halogen crystallinesubstance and rock[A].SeismicElectricity Symposium[C].Beijing:Earthquake Press,1989:149-158.
[13]钱书清,郝锦绮,周建国,等.岩石受压破裂的ULF和LF电磁前兆信号[J].中国地震,2003,19(2):109-116.Qian Shuqing,Hao Jinqi,Zhou Jianguo,et al.Precursory electric and magnetic signals at ULF and LF bands during the frac-ture of rocks under pressure[J].Earthquake Research in China,2003,19(2):109-116.
[14]郝锦绮,刘力强,龙海丽,等.双轴压力下岩样自电位变化实验的新结果[J].地球物理学报,2004,47(3):475-482.Hao Jinqi,Liu Liqiang,Long Haili,et al.Newresult of the experiment on self-potential change of rocks under biaxial com-pression[J].Chinese J.Geo-phys.,2004,47(3):475-482.
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