| Correlation dimension analysis of AE sequence under failure process of gas-filled coal |
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| 作者姓名： | LIU Yan bao CAO Shu gang LI Yong GUO Ping and ZHANG Zun guo |
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| 作者单位： | Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, P.R.China;Chongqing Research Institute of China Coal Technology & Engineering Gro;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education;State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P.R.China;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, P.R.China; DISTART Department, Faculty of Engineering, University of Bologna, Via;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education;State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P.R.China;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education;State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P.R.China |
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| 摘 要： | The correlation dimension evolution characteristics of acoustic emission(AE) time-series during the instability and failure of coal with and without gas are analyzed base on fractal theory. The results show the coal rock’s AE time-series of deformation stages have obviously fractal characteristics under uniaxial loading. The processes of AE of deformation have different self-similarity, and the correlation dimension can describe the mechanical state of coal. During the triaxial loading process, the stress-varying trend of AE time-series of coal with and without gas is similar to the trend of AE correlation dimension. The sharp decrease of AE time-series’ correlation dimension can be considered as a “precursor” for failure. This feature doesn’t change with the change of confining pressure and gas pressure.
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| 关 键 词： | gas-filled coal damage acoustic emission correlation dimension gas adsorption |
Correlation dimension analysis of AE sequence under failure process of gas-filled coal |
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| LIU Yan bao,CAO Shu gang,LI Yong,GUO Ping and ZHANG Zun guo.Correlation dimension analysis of AE sequence under failure process of gas-filled coal[J].Storage & Process,2012(3):108-114. |
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| Authors: | LIU Yan bao CAO Shu gang LI Yong GUO Ping and ZHANG Zun guo |
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| Institution: | Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, P.R.China;Chongqing Research Institute of China Coal Technology & Engineering Gro;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education;State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P.R.China;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, P.R.China; DISTART Department, Faculty of Engineering, University of Bologna, Via;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education;State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P.R.China;Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education;State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P.R.China |
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| Abstract: | |
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| Keywords: | gas-filled coal damage acoustic emission correlation dimension gas adsorption |
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