Influence of gas adsorption induced non-uniform deformation on the evolution of coal permeability
文献类型：期刊论文
| 作者 | Wei, Mingyao; Liu, Jishan; Elsworth, Derek; Li, Shaojun; Zhou, Fubao |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2019 |
| 卷号 | 114期号:-页码:71-78 |
| 关键词 | Local strain Coal permeability Non-uniform swelling Strain rate |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2018.12.021 |
| 英文摘要 | When adsorbing gas is injected into coal, the gas fills in the fractures quickly and a pressure difference between matrix and fractures is created. Because of this difference, there is a pressure gradient within the matrix. The gradient evolves with time from the initial equilibrium (zero gradient) to the final equilibrium (zero gradient), so does the adsorption-swelling induced matrix deformation. Previous studies have not taken this effect into consideration. In this study, we hypothesize that the pressure gradient affects the expansion of the gas-invaded area/volume with the matrix and the propagation of the expansion front creates a non-uniform deformation within the matrix. Under this hypothesis, a relation between coal permeability and the expansion of the gas-invaded area with the matrix can be established. When the gas-invaded area is localized in the vicinity of the fracture wall, the expansion of the matrix within this area narrows the fracture opening. We define this as local swelling/shrinking. This local swelling/shrinking is controlled primarily by the coal internal structure. When the gas-invaded area is further spread over the matrix, the expansion of the whole matrix may narrow or widen the fracture opening depending on the external boundary conditions. This global swelling/shrinking is controlled primarily by the external boundary conditions. These conceptual understandings are defined through strain rate-based coal permeability models for both the matrix and the fractures. This strain rate based time-dependent permeability model was verified against experimental observations, that couples coal deformation, the gas flow in the matrix system and gas flow in the fracture system. |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000456772700008 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/15058]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Penn State Univ, G3 Ctr, Dept Energy & Mineral Engn, University Pk, PA 16802 USA; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 3.Univ Western Australia, Sch Engn, Dept Chem Engn, O35 Stirling Highway, Perth, WA 6009, Australia; 4.Penn State Univ, Energy Inst, University Pk, PA 16802 USA |
| 推荐引用方式 GB/T 7714 | Wei, Mingyao,Liu, Jishan,Elsworth, Derek,et al. Influence of gas adsorption induced non-uniform deformation on the evolution of coal permeability[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2019,114(-):71-78. |
| APA | Wei, Mingyao,Liu, Jishan,Elsworth, Derek,Li, Shaojun,&Zhou, Fubao.(2019).Influence of gas adsorption induced non-uniform deformation on the evolution of coal permeability.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,114(-),71-78. |
| MLA | Wei, Mingyao,et al."Influence of gas adsorption induced non-uniform deformation on the evolution of coal permeability".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 114.-(2019):71-78. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。