| Fractal characteristics of acoustic emission of gas-bearing coal subjected to true triaxial loading | |
Zhang, Ran1,2; Liu, Jie1,2,3 ; Sa, Zhanyou1,2; Wang, Zaiquan4; Lu, Shouqing1,2; Lv ZY(吕召阳)5,6
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| 通讯作者 | Liu, Jie([email protected]) |
| 发表期刊 | MEASUREMENT
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| 2021-02-01 | |
| 卷号 | 169页码:13 |
| ISSN | 0263-2241 |
| 摘要 | As coal mining proceeds deeper, coal and rock are subjected to growing stresses and gas pressures. Consequently, coal and rock gas dynamic disasters pose more and more considerable threats and hazards which should be warned in advance. Coal and rock in the field is actually in the true triaxial stress state. Study on deformation characteristics and precursory information of coal and rock under this state is meaningful for disaster warning. In this paper, experiments on the deformation, failure and acoustic emission (AE) characteristics of gas-bearing coal under true triaxial loading conditions were carried out. Besides, the variation law and fractal characteristics of AE under different gas pressures and confining stresses were analyzed. Furthermore, the effects of gas pressure and confining stress on the deformation, failure and fractal characteristics of coal were discussed. The results show that the process of AE variation under true triaxial loading conditions can be divided into two stages, namely the slow growth stage and the accelerated growth stage. A higher gas pressure corresponds to a shorter duration of slow growth stage, while a higher confining stress corresponds to a longer duration of slow growth stage. AE time series has fractal characteristics, and the correlation dimension can characterize the damage degree of a loaded coal sample. The dynamic changes, i.e., fluctuation-increase-decrease, in correlation dimension can accurately reflect the damage evolution process of a coal sample. In addition, the gradual reduction of correlation dimension can be used as the precursor information of coal sample instability and damage. The research results boast instructive significance for preventing the occurrence of coal and rock gas dynamic disasters and for reducing casualties and property loss in coal mines. |
| 关键词 | True triaxial Gas-bearing coal Acoustic emission Correlation dimension Fractal characteristic |
| DOI | 10.1016/j.measurement.2020.108349 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000600431500005 |
| 关键词[WOS] | DEFORMATION ; ENERGY ; DIMENSION ; PRESSURE ; METHANE ; AE |
| WOS研究方向 | Engineering ; Instruments & Instrumentation |
| WOS类目 | Engineering, Multidisciplinary ; Instruments & Instrumentation |
| 资助项目 | National Natural Science Foundation of China[51504140] ; National Natural Science Foundation of China[51574153] ; National Natural Science Foundation of China[51804176] ; National Natural Science Foundation of China[51974169] ; Natural Science Foundation of Shandong Province[ZR2018PEE001] ; Key R&D Plan in Shandong Province[2018GSF120012] ; China Postdoctoral Science Foundation[2018M642632] ; China Postdoctoral Science Foundation[2019M652346] ; Project of Shandong Province Higher Educational Science and Technology Program[J18KA187] ; Open Found of the Laboratory of Mining Disaster Prevention and Control[MDPC201903] |
| 项目资助者 | National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province ; Key R&D Plan in Shandong Province ; China Postdoctoral Science Foundation ; Project of Shandong Province Higher Educational Science and Technology Program ; Open Found of the Laboratory of Mining Disaster Prevention and Control |
| 论文分区 | 二类/Q1 |
| 力学所作者排名 | 5+ |
| RpAuthor | Liu, Jie |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/85895 |
| 专题 | 流固耦合系统力学重点实验室 |
| 作者单位 | 1.Qingdao Univ Technol, Dept Safety Engn, Qingdao 266520, Shandong, Peoples R China; 2.Shandong Key Ind Field Accid Prevent Technol Res, Qingdao 266520, Shandong, Peoples R China; 3.West Virginia Univ, Dept Min Engn, Morgantown, WV 26506 USA; 4.Qingdao Univ Technol, Sch Sci, Qingdao 266520, Shandong, Peoples R China; 5.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ran,Liu, Jie,Sa, Zhanyou,et al. Fractal characteristics of acoustic emission of gas-bearing coal subjected to true triaxial loading[J]. MEASUREMENT,2021,169:13.Rp_Au:Liu, Jie |
| APA | Zhang, Ran,Liu, Jie,Sa, Zhanyou,Wang, Zaiquan,Lu, Shouqing,&吕召阳.(2021).Fractal characteristics of acoustic emission of gas-bearing coal subjected to true triaxial loading.MEASUREMENT,169,13. |
| MLA | Zhang, Ran,et al."Fractal characteristics of acoustic emission of gas-bearing coal subjected to true triaxial loading".MEASUREMENT 169(2021):13. |
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