煤岩摩擦过程表面电位特征规律实验研究
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摘要
实验研究了煤岩摩擦过程中表面电位及其变化规律,初步探讨了煤岩摩擦表面电位变化机理。结果表明:煤岩摩擦过程中有表面电位产生,并且与载荷有较好的对应关系。煤岩摩擦过程分别经历了静摩擦阶段和动摩擦阶段,且动摩擦阶段的表面电位信号强于静摩擦阶段。岩石摩擦过程表面电位信号基本呈正负双向突变,摩擦面两侧表面电位极性相反,具有对称性;煤样摩擦过程表面电位信号基本呈单向突变,摩擦面两侧表面电位极性对称不显著。煤岩摩擦引起表面电位发生变化可由摩擦起电、热电子发射和场致电子发射等机制解释。
The experiment was made on the rules of surface potential of coal or rock during friction process.The mechanism producing surface potential of coal or rock friction was discussed initially.The results show that surface potential can be produced during coal or rock friction process,and it has a better corresponding relationship with load.The coal or rock friction process can be divided into two stages:static friction stage and kinetic friction stage.The surface potential signal in kinetic friction stage was stronger than that in static friction stage.During rock friction process,the polarity of surface potential signal was basically bidirectional mutation,and the polarity of surface potential on both sides of friction surface had obvious symmetry.While the polarity of surface potential signal was basically unidirectional mutation in coal friction process,and the polarity of surface potential on both sides of friction surface was not in significant symmetry.The changes of surface potential during coal or rock friction process can be explained by mechanism of electricity produced by friction,thermionic emission and field electron emission.
The experiment was made on the rules of surface potential of coal or rock during friction process.The mechanism producing surface potential of coal or rock friction was discussed initially.The results show that surface potential can be produced during coal or rock friction process,and it has a better corresponding relationship with load.The coal or rock friction process can be divided into two stages:static friction stage and kinetic friction stage.The surface potential signal in kinetic friction stage was stronger than that in static friction stage.During rock friction process,the polarity of surface potential signal was basically bidirectional mutation,and the polarity of surface potential on both sides of friction surface had obvious symmetry.While the polarity of surface potential signal was basically unidirectional mutation in coal friction process,and the polarity of surface potential on both sides of friction surface was not in significant symmetry.The changes of surface potential during coal or rock friction process can be explained by mechanism of electricity produced by friction,thermionic emission and field electron emission.
引文
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[18]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):187-192.Li Zhonghui,Wang Enyuan,Liu Zhentang,et al.Study on charac-teristics and rules of surface potential during coal fracture[J].Jour-nal of China University of Mining&Technology,2009,38(2):187-192.
[19]李忠辉.受载煤体变形破裂表面电位效应及其机理的研究[D].徐州:中国矿业大学,2007.Li Zhonghui.Study on surface potential effect and its mechanism ofcoal during deformation and fracture under load[D].Xuzhou:Chi-na University of Mining and Technology,2007.
[20]王恩元,李忠辉,刘贞堂,等.受载煤体表面电位效应的实验研究[J].地球物理学报,2009,52(5):1318-1325.Wang Enyuan,Li Zhonghui,Liu Zhentang,et al.Experimentalstudy on surface potential effect of coal under load[J].Chinese J.Geophys.,2009,52(5):1318-1325.
[21]刘杰,王恩元,李忠辉,等.预制裂纹煤样单轴压缩表面电位实验研究[J].煤炭学报,2011,36(7):1135-1138.Liu Jie,Wang Enyuan,Li Zhonghui,et al.Experiment study on sur-face potential of pre-cracked coal under uniaxial compression[J].Journal of China Coal Society,2011,36(7):1135-1138.
[22]陈顒,耿乃光,姚孝新.不完整岩石样品的断裂与摩擦滑动[J].地球物理学报,1979,22(2):195-200.Chen Rong,Geng Naiguang,Yao Xiaoxin.Fracture and frictional ofrock samples with saw cut[J].Chinese J.Geophysics,1979,22(2):195-200.
[23]耿乃光,刘晓红.四种岩石的摩擦滑动特征[J].岩土工程学报,1987,9(3):27-33.Geng Naiguang,Liu Xiaohong.The friction characters of four kindsof rocks[J].Chinese Journal of Geotechnical Engineering,1987,9(3):27-33.
[2]文光才,李建功,邹银辉,等.矿井煤岩动力灾害声发射监测适用条件初探[J].煤炭学报,2011,36(2):278-282.Wen Guangcai,Li Jiangong,Zou Yinhui,et al.Preliminary study onthe application conditions of acoustic emission monitoring dynamicdisasters in coal and rock[J].Journal of China Coal Society,2011,36(2):278-282.
[3]李楠,王恩元,赵恩来,等.岩石循环加载和分级加载损伤破坏声发射实验研究[J].煤炭学报,2010,35(7):1099-1103.Li Nan,Wang Enyuan,Zhao Enlai,et al.Experiment on acousticemission of rock damage and fracture under cyclic loading andmulti-stage loading[J].Journal of China Coal Society,2010,35(7):1099-1103.
[4]姜志海,焦险峰.矿井瞬变电磁超前探测物理实验[J].煤炭学报,2011,36(11):1852-1857.Jiang Zhihai,Jiao Xianfeng.Physical experiment of mine transientelectromagnetic advanced detection[J].Journal of China Coal Soci-ety,2011,36(11):1852-1857.
[5]潘一山,罗浩,肖晓春,等.三轴条件下含瓦斯煤力电感应规律的试验研究[J].煤炭学报,2012,37(6):918-922.Pan Yishan,Luo Hao,Xiao Xiaochun,et al.Experimental study onmechanical-charge induction law of coal containing gas under triaxialcompression[J].Journal of China Coal Society,2012,37(6):918-922.
[6]李丹,韩德品,石亚丁,等.采煤工作面顺煤层透视的电法探测方法[J].煤炭学报,2010,35(8):1336-1340.Li Dan,Han Depin,Shi Yading,et al.ADC electrical penetrationmethod for prospecting the coal face alone the same coal layer[J].Journal of China Coal Society,2010,35(8):1336-1340.
[7]李忠辉,王恩元,何学秋.混凝土断裂表面带电异常研究[J].煤炭学报,2010,35(6):910-914.Li Zhonghui,Wang Enyuan,He Xueqiu.Research on surface electricanomaly of concrete in fracture[J].Journal of China Coal Society,2010,35(6):910-914.
[8]吴立新,王金庄.煤岩受压红外热象与辐射温度特征实验[J].中国科学:D辑,1998,28(1):41-46.Wu Lixin,Wang Jinzhuang.Experimental study of infrared radiationfeatures of coal and rocks under loading[J].China Science:D,1998,28(1):41-46.
[9]樊栓保.国内外煤与瓦斯突出预测的新方法[J].矿业安全与环保,2000,27(5):17-19.Fan Shuanbao.New methods for coal and gas out-burst forecast inhome and abroad[J].Mining Safety&Environmental Protection,2000,27(5):17-19.
[10]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.The effect of EME&AE during the fracture of coalcontaining gas and its applications[D].Xuzhou:China Universityof Mining and Technology,1997.
[11]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,2003:389-407.He Xueqiu,Wang Enyuan,Nie Baisheng,et al.Electromagnetic dy-namics of coal or rock rheology[M].Beijing:Science Press,2003:389-407.
[12]Frid V.Rock-burst hazard forecast by electromagnetic radiation ex-cited by rock fracture[J].Rock Mechanics and Rock Engineering,1997,30(4):229-236.
[13]王恩元,何学秋,聂百胜,等.电磁辐射法预测煤与瓦斯突出原理[J].中国矿业大学学报,2000,29(3):225-229.Wang Enyuan,He Xueqiu,Nie Baisheng,et al.Principle of predic-ting coal and gas outburst using electromagnetic emission[J].Jour-nal of China University of Mining&Technology,2000,29(3):225-229.
[14]王恩元,何学秋,刘贞堂,等.煤岩动力灾害电磁辐射监测仪及其应用[J].煤炭学报,2003,28(4):366-369.Wang Enyuan,He Xueqiu,Liu Zhentang,et al.Electromagnetic ra-diation detector of coal or rock dynamic disasters and its application[J].Journal of China Coal Society,2003,28(4):366-369.
[15]吴小平,施行觉,郭自强.花岗岩压缩带电的实验研究[J].地球物理学报,1990,32(2):208-211.Wu Xiaoping,Shi Xingjue,Guo Ziqiang.Study on the electrificationof granite samples under compression[J].Chinese Journal of Geo-physics,1990,33(2):208-211.
[16]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.New result of the experi-ment on self-potential change of rocks under biaxial compression[J].Chinese Journal of Geophysics,2004,47(3):475-482.
[17]龙海丽.岩石破裂过程的自电位异常的研究[D].北京:中国地震局地球物理研究所,2003.Long Haili.The study of self-potential abnormity during the rockbreaking[D].Beijing:Institute of Geophysics,China EarthquakeAdministration,2003.
[18]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):187-192.Li Zhonghui,Wang Enyuan,Liu Zhentang,et al.Study on charac-teristics and rules of surface potential during coal fracture[J].Jour-nal of China University of Mining&Technology,2009,38(2):187-192.
[19]李忠辉.受载煤体变形破裂表面电位效应及其机理的研究[D].徐州:中国矿业大学,2007.Li Zhonghui.Study on surface potential effect and its mechanism ofcoal during deformation and fracture under load[D].Xuzhou:Chi-na University of Mining and Technology,2007.
[20]王恩元,李忠辉,刘贞堂,等.受载煤体表面电位效应的实验研究[J].地球物理学报,2009,52(5):1318-1325.Wang Enyuan,Li Zhonghui,Liu Zhentang,et al.Experimentalstudy on surface potential effect of coal under load[J].Chinese J.Geophys.,2009,52(5):1318-1325.
[21]刘杰,王恩元,李忠辉,等.预制裂纹煤样单轴压缩表面电位实验研究[J].煤炭学报,2011,36(7):1135-1138.Liu Jie,Wang Enyuan,Li Zhonghui,et al.Experiment study on sur-face potential of pre-cracked coal under uniaxial compression[J].Journal of China Coal Society,2011,36(7):1135-1138.
[22]陈顒,耿乃光,姚孝新.不完整岩石样品的断裂与摩擦滑动[J].地球物理学报,1979,22(2):195-200.Chen Rong,Geng Naiguang,Yao Xiaoxin.Fracture and frictional ofrock samples with saw cut[J].Chinese J.Geophysics,1979,22(2):195-200.
[23]耿乃光,刘晓红.四种岩石的摩擦滑动特征[J].岩土工程学报,1987,9(3):27-33.Geng Naiguang,Liu Xiaohong.The friction characters of four kindsof rocks[J].Chinese Journal of Geotechnical Engineering,1987,9(3):27-33.
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