Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading
Taking coal under hydro-mechanical coupling as the research object, the discrete element software PFC3D (particle flow code) was used to analyze the relationships among the force, acoustic emission (AE), and energy during coal fracture. Based on the moment tensor (MT) inversion, we revealed the AE e...
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MDPI AG
2022-09-01
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| author | Jie-Fang Song Cai-Ping Lu Zhao-Wei Zhan Hai-Feng Cui Yan-Min Wang Jian-Hua Wang |
| author_facet | Jie-Fang Song Cai-Ping Lu Zhao-Wei Zhan Hai-Feng Cui Yan-Min Wang Jian-Hua Wang |
| author_sort | Jie-Fang Song |
| collection | DOAJ |
| description | Taking coal under hydro-mechanical coupling as the research object, the discrete element software PFC3D (particle flow code) was used to analyze the relationships among the force, acoustic emission (AE), and energy during coal fracture. Based on the moment tensor (MT) inversion, we revealed the AE event distribution and source type during crack initiation and propagation until the final failure of coal. Meanwhile, we examined the relationships among the stress, number and type of cracks, magnitude, K<sub>E</sub>, and b value of AE under different water and confining pressures. The results show that the numerical simulation can effectively determine the microscopic damage mechanism of coal under different conditions. Moreover, the rupture type of the numerical simulation is consistent with the field investigations, which verifies the rationality of the simulation. These research results can provide reference for safety production evaluation of water inrush mines. |
| first_indexed | 2024-03-09T21:32:01Z |
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| id | doaj.art-03ccc5e6c1304f06a8ef30d91655e724 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:32:01Z |
| publishDate | 2022-09-01 |
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| spelling | doaj.art-03ccc5e6c1304f06a8ef30d91655e7242023-11-23T20:52:02ZengMDPI AGMaterials1996-19442022-09-011519651010.3390/ma15196510Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling LoadingJie-Fang Song0Cai-Ping Lu1Zhao-Wei Zhan2Hai-Feng Cui3Yan-Min Wang4Jian-Hua Wang5Key Laboratory of Deep Coal Resource Mining, Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining, Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaXiaoyun Coal Mine, Jining Energy Group, Jining 272000, ChinaXiaoyun Coal Mine, Jining Energy Group, Jining 272000, ChinaXiaoyun Coal Mine, Jining Energy Group, Jining 272000, ChinaXiaoyun Coal Mine, Jining Energy Group, Jining 272000, ChinaTaking coal under hydro-mechanical coupling as the research object, the discrete element software PFC3D (particle flow code) was used to analyze the relationships among the force, acoustic emission (AE), and energy during coal fracture. Based on the moment tensor (MT) inversion, we revealed the AE event distribution and source type during crack initiation and propagation until the final failure of coal. Meanwhile, we examined the relationships among the stress, number and type of cracks, magnitude, K<sub>E</sub>, and b value of AE under different water and confining pressures. The results show that the numerical simulation can effectively determine the microscopic damage mechanism of coal under different conditions. Moreover, the rupture type of the numerical simulation is consistent with the field investigations, which verifies the rationality of the simulation. These research results can provide reference for safety production evaluation of water inrush mines.https://www.mdpi.com/1996-1944/15/19/6510hydro-mechanical couplingfailure mechanismconfining pressureacoustic emissionmoment tensor inversion |
| spellingShingle | Jie-Fang Song Cai-Ping Lu Zhao-Wei Zhan Hai-Feng Cui Yan-Min Wang Jian-Hua Wang Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading Materials hydro-mechanical coupling failure mechanism confining pressure acoustic emission moment tensor inversion |
| title | Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading |
| title_full | Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading |
| title_fullStr | Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading |
| title_full_unstemmed | Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading |
| title_short | Numerical and Field Investigations of Acoustic Emission Laws of Coal Fracture under Hydro-Mechanical Coupling Loading |
| title_sort | numerical and field investigations of acoustic emission laws of coal fracture under hydro mechanical coupling loading |
| topic | hydro-mechanical coupling failure mechanism confining pressure acoustic emission moment tensor inversion |
| url | https://www.mdpi.com/1996-1944/15/19/6510 |
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