岩石破碎声发射和电磁辐射特征试验研究
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摘要
为了研究岩石破碎声发射和电磁辐射特征,利用RMT-150C压力试验机进行刀具静力侵入花岗岩破碎试验,采用AEwin-USB型声发射和KBD5电磁辐射采集系统接收声发射和电磁辐射信号,开展了刀具破岩过程中声发射和电磁辐射特性及加载速率对其影响的研究。以3种加载速率分别为0.001 mm/s、0.01 mm/s、0.1 mm/s进行破岩试验,结果表明:刀具受载侵入破岩过程中产生声发射和电磁辐射现象,采集的两信号波形变化与刀具侵入载荷曲线均呈跃进式特征,且具有较好的一致性;随加载速率增加,声发射和电磁辐射信号增强,声发射峰值计数率、能量率和电磁辐射峰值强度、脉冲数与加载速率呈较好的正相关性。
For researching acoustic emission and electromagnetic emission characteristics of rock fragmentation,rock static breaking experiment on the granite was carried out on the RMT-150 C rock mechanics testing machine with normal cutter by using AEwin-USB type acoustic emission and KBD5 electromagnetic emission acquisition system. The characteristics of acoustic emission and electromagnetic emission and the influence of loading rate on the rock breaking process were studied. The static rock invasion test was carried out with three loading rates of 0.001 mm/s,0. 01 mm/s and 0.1 mm/s. The results show that the phenomenon of acoustic emission and electromagnetic radiation is produced during the process of loading and breaking rock. The wave forms of the two signals and the load curves of the tools are in the form of a leap forward and have good consistency. With the increase of loading rate,the acoustic emission and electromagnetic emission signals are enhanced,and the acoustic emission peak count rate is positively correlated with the energy rate,the peak intensity of electromagnetic emission,the pulse number and the loading rate.
For researching acoustic emission and electromagnetic emission characteristics of rock fragmentation,rock static breaking experiment on the granite was carried out on the RMT-150 C rock mechanics testing machine with normal cutter by using AEwin-USB type acoustic emission and KBD5 electromagnetic emission acquisition system. The characteristics of acoustic emission and electromagnetic emission and the influence of loading rate on the rock breaking process were studied. The static rock invasion test was carried out with three loading rates of 0.001 mm/s,0. 01 mm/s and 0.1 mm/s. The results show that the phenomenon of acoustic emission and electromagnetic radiation is produced during the process of loading and breaking rock. The wave forms of the two signals and the load curves of the tools are in the form of a leap forward and have good consistency. With the increase of loading rate,the acoustic emission and electromagnetic emission signals are enhanced,and the acoustic emission peak count rate is positively correlated with the energy rate,the peak intensity of electromagnetic emission,the pulse number and the loading rate.
引文
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[17]陈宇龙,魏作安,许江,等.单轴压缩条件下岩石声发射特性的实验研究[J].煤炭学报,2011,36(增2):237-240.(Chen Yulong,Wei Zuoan,Xu Jiang,et al.Experimental research on the acoustic emission characteristics of rock under uniaxial compression[J].Chinese Journal of China Coal Society,2011,36(Supp.2):237-240.(in Chinese))
[18]李玉,赵伏军,王斌,等.刀具压入破岩声发射分形特征实验[J].湖南科技大学学报(自然科学版),2018,33(1):10-15.(Li Yu,Zhao Fujun,Wang Bin,et al.Experimental research on fractal characteristics of acoustic emission during cutter pressing in rock fragmentation[J].Journal of Hunan University of Science&Technology(Natural Science Edition),2018,33(1):10-15.(in Chinese))
[19]王恩元,赵恩来.岩土单轴压缩过程的电磁辐射特性实验研究[J].辽宁工程技术大学学报,2007,26(1):56-58.(Wang Enyuan,Zhao Enlai.Experiment study on electro-magnetic emission character of rock and soil in process uniaxial compression loading,2007,26(1):56-58.(in Chinese))
[2]王恩元,何学秋,陈忠辉,等.煤岩电磁辐射技术及其应用[M].北京:科学出版社,2009.(Wang Enyuan,He Xueqiu,Chen Zhonghui,et al.Electromagnetic emission technology of coal and rock and its application[M].Beijing:Science Press,2009.(in Chinese))
[3]Tham L G,Liu H,Tang C A,et al.On tension failure of 2-d rock specimens and associated acoustic emission[J].Rock Mechanics and Rock Engineering,2005,38(1):1-19.
[4]Shkuratnik V L,Filimonov Y L,Kuchurin S V.Regularities of acoustic emission in coal samples under triaxial compression[J].Journal of Mining Science,2005,41(1):44-52.
[5]李果,艾婷,于斌,等.不同岩性巴西劈裂实验的声发射特征[J].煤炭学报,2015,40(4):870-881.(Li Guo,Ai Ting,Yu Bin,et al.Acoustic emission characteristics of different lithologies under Brazilian splitting[J].Journal of China Coal Society,2015,40(4):870-881.(in Chinese))
[6]高保彬,李回贵,刘云鹏,等.单轴压缩下煤岩声发射及分形特征研究[J].地下空间与工程学报,2013,9(5):986-991,1005.(Gao Baonbin,Li Huigui,Liu Yunpeng,et al.Study of acoustic emission and fractal characteristics of coal rock under uniaxial compression[J].Chinese Journal of Underground Space and Engineering,2013,9(5):986-991,1005.(in Chinese))
[7]高保彬,李回贵,李化敏.不同破坏类型岩石的声发射及分形特征研究[J].地下空间与工程学报,2015,11(2):358-363.(Gao Baonbin,Li Huigui,Li Huamin.Study on acoustic emission and fractal characteristics of different damage types of rock[J].Chinese Journal of Underground Space and Engineering,2015,11(2):358-363.(in Chinese))
[8]秦虎,黄滚,王维忠.不同含水率煤岩受压变形破坏全过程声发射特征试验研究[J].岩石力学与工程学报,2012,31(6):1115-1120.(Qin Hu,Huang Gun,Wang Weizhong.Experimental study of acoustic emission characteristics of coal samples with different moisture contents in process of compression deforrmation and fallure[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(6):1115-1120.(in Chinese))
[9]Huang Q.One Possible generation mechanism of coseismic electric signals[J].Physical and Biological sciences,2002,78(7):173-178.
[10]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):908-914.(Dou Linming,Wang Yuhai,He Xueqiu,et al.Study on electromagnetic emission characteritic for coal sample derormation and fallure during pre-and-post-peaking phases[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):908-914.(in Chinese))
[11]任学坤,王恩元,李忠辉.预制裂纹岩板破坏电位与电磁辐射特征的实验研究[J].中国矿业大学学报,2016,45(3):440-446.(Ren Xuekun,Wang Enyuan,Li Zhonghui.Experimental study of characteristics of surface potential and electromagnetic radiation of precracked rock plate during fracture[J].Journal of China University of Mining and Technology,2016,45(3):440-446.(in Chinese))
[12]吕岗岗,沈荣喜,邱黎明,等.矿井底板突水过程声电信号变化特征实验研究[J].工矿自动化,2015,41(10):16-19.(LüGanggang,Shen Rongxi,Qiu Lingming,et al.Experimental research of variation characteristic of electromagnetic radiation,acoustic emission and surface electric potential during water inrush in mine floor[J].Industry and Mine Automation,2015,41(10):16-19.(in Chinese))
[13]王恩元,何学秋.煤岩变形破裂电磁辐射的实验研究[J].地球物理学报,2000,43(1):131-137.(Wang Enyuan,He Xueqiu.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))
[14]潘一山,唐治,李忠华,等.不同加载速率下煤岩单轴压缩电荷感应规律研究[J].地球物理学报,2013,56(3):1043-1048.(Pan Yishan,Tang Zhi,Li Zhonghua,et al.Resarch on the charge inducing regularty of coal rock at different loading rate in uniaxial compression tests[J].Chinese Journal of Geophysics,2013,56(3):1043-1048.(in Chinese))
[15]李忠辉,娄全,王恩元,等.顶板岩石受压破坏过程中声电热效应研究[J].中国矿业大学学报,2016,45(6):1098-1103.(Li Zhonghui,Lou Quan,Wang Enyuan,et al.Experimental study of acoustic-electric and thermal infrared characteristics of roof rock failure[J].Journal of China University of Mining and Technology,2016,45(6):1098-1103.(in Chinese))
[16]曹安业,井广成,窦林名,等.不同加载速率下岩样损伤演化的声发射特征研究[J].采矿与安全工程学报,2015,32(6):923-928,935.(Cao Anye,Jing Guangcheng,Dou Linming,et al.Damage evolution law based on acoustic emission of sandy mudstone under different uniaxial loading rate[J].Journal of Mining&Safety Engineering,2015,32(6):923-928,935.(in Chinese))
[17]陈宇龙,魏作安,许江,等.单轴压缩条件下岩石声发射特性的实验研究[J].煤炭学报,2011,36(增2):237-240.(Chen Yulong,Wei Zuoan,Xu Jiang,et al.Experimental research on the acoustic emission characteristics of rock under uniaxial compression[J].Chinese Journal of China Coal Society,2011,36(Supp.2):237-240.(in Chinese))
[18]李玉,赵伏军,王斌,等.刀具压入破岩声发射分形特征实验[J].湖南科技大学学报(自然科学版),2018,33(1):10-15.(Li Yu,Zhao Fujun,Wang Bin,et al.Experimental research on fractal characteristics of acoustic emission during cutter pressing in rock fragmentation[J].Journal of Hunan University of Science&Technology(Natural Science Edition),2018,33(1):10-15.(in Chinese))
[19]王恩元,赵恩来.岩土单轴压缩过程的电磁辐射特性实验研究[J].辽宁工程技术大学学报,2007,26(1):56-58.(Wang Enyuan,Zhao Enlai.Experiment study on electro-magnetic emission character of rock and soil in process uniaxial compression loading,2007,26(1):56-58.(in Chinese))