Research on simulating coal crack development under high voltage electric pulse stress waves using zero thickness cohesive elements
文献类型：期刊论文
| 作者 | Wu, Jiayao1; Jiang, Changbao1; Hou, Diandong2; Nie, Baisheng1; Yan, Fazhi3; Wu, Mingyang1,4 |
| 刊名 | FUEL
 |
| 出版日期 | 2024-12-15 |
| 卷号 | 378页码:14 |
| 关键词 | Coal fracturing High-voltage electrical pulse technology Stress wave Crack development process Zero thickness cohesive elements |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2024.132657 |
| 英文摘要 | High voltage electric pulse (HVEP) technology has demonstrated significant potential in enhancing coal seam permeability. However, there is a notable gap in numerical simulation studies that investigate the cracks development patterns in coal under the influence of this technology. In this study, a HVEP coal rock fracturing system was utilized to conduct a physical simulation experiment of coal sample electrical fragmentation. A finitediscrete element method (FDEM) model, incorporating zero-thickness cohesive elements, was developed to simulate the process of stress wave-induced crack propagation in coal, triggered by the plasma channel. The results indicate that over time, the stress wave typically exhibits an initial rapid rise followed by an oscillatory decline. The peak value of the stress wave decreases significantly with distance, stabilizing beyond a propagation distance of 10 mm. Furthermore, the fracturing efficacy of coal by HVEP stress waves is closely linked to specific characteristic parameters: within the range of 75-125 MPa, a positive correlation exists between the stress wave peak and the complexity of the coal crack network. Reducing the stress wave loading rate can increase the crack area to some extent, although excessively slow loading rates may lead to excessive energy dissipation during propagation, which is detrimental to crack expansion. Conversely, when the ratio of beta to alpha ranges from 1 to 100, decelerating the attenuation rate of the stress wave aids in generating stress concentration within the crack zone, thereby facilitating crack propagation. The established numerical model aims to advance understanding of HVEP's fracturing mechanisms and enhance its application in coalbed methane extraction. |
| 资助项目 | National Natural Science Foundation of China[52074044] ; National Natural Science Foundation of China[52274111] ; National Natural Science Foundation of China[52274221] ; Entrepreneurship & Innovation Support Program for Chongqing Overseas Returnees[cx2020112] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001299879100001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42340]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jiang, Changbao; Wu, Mingyang |
| 作者单位 | 1.Chongqing Univ, Sch Resources & Safety Engn, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400030, Peoples R China 2.Yankuang Energy Grp Co Ltd, Jining Mine 3, Jining 272169, Peoples R China 3.Taiyuan Univ Technol, Coll Safety & Emergency Management Engn, Taiyuan 030024, Peoples R China 4.Chinese Acad Sci, Wuhan Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Jiayao,Jiang, Changbao,Hou, Diandong,et al. Research on simulating coal crack development under high voltage electric pulse stress waves using zero thickness cohesive elements[J]. FUEL,2024,378:14. |
| APA | Wu, Jiayao,Jiang, Changbao,Hou, Diandong,Nie, Baisheng,Yan, Fazhi,&Wu, Mingyang.(2024).Research on simulating coal crack development under high voltage electric pulse stress waves using zero thickness cohesive elements.FUEL,378,14. |
| MLA | Wu, Jiayao,et al."Research on simulating coal crack development under high voltage electric pulse stress waves using zero thickness cohesive elements".FUEL 378(2024):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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