A fully coupled coal deformation and compositional flow model for the control of the pre-mining coal seam gas extraction
文献类型：期刊论文
| 作者 | Xia, Tongqiang1,2,4; Zhou, Fubao1,3; Liu, Jishan5; Hu, Shengyong1; Liu, Yingke1,3 |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2014 |
| 卷号 | 72页码:138-148 |
| 关键词 | Coal seam gas drainage Coal gas interactions Compositional flow Fracture sealing |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2014.08.012 |
| 英文摘要 | Fully coupled compositional (coal seam gas and air) model of coal deformation, coal gas flow and transport, and air flow in coal seams is developed to better understand the gas drainage processes and the coal gas-air mixing mechanisms during pre-mining coal seem gas extraction. The model was first verified by showing that the modelled gas concentration profiles match reasonably with the in-situ measured ones. The verified model was then applied to evaluate how the drained gas concentration could be controlled under different conditions of the sealing length, the leakage rate and the leakage fracture width. These modelled results provides the basis of a new in-situ control technology of gas-air mixing, which uses fine expansive particles to seal the leakage fractures around the borehole. This technology has been commercially applied to enhance the concentration of the pre-mining gas drainage. The field test shows that the characteristics of the leakage fractures are greatly changed after the particles are injected into the in seam drainage borehole when the gas concentration declines. Once the leakage fractures are blocked with the particles, the outside air is prevented from entering the coal seam. Thus, an ideal gas concentration can be maintained, and the duration of higher gas concentration is extended. For boreholes with an originally low gas concentration (0-30%), the new technology can increase the gas concentration by 10-65% and extend the production time by approximately two to three months. The total amount of gas drainage increases to 2000-3000 m(3) per borehole. (C) 2014 Elsevier Ltd. All rights reserved, |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000345583900016 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3657]  |
| 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.China Univ Min & Technol, Key Lab Gas & Fire Control Coal Mines; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.China Univ Mining & Technol, State Key Lab Coal Resources & Safe Mining; 4.China Univ Mining & Technol, State Key Lab Geomech & Deep Underground Engn; 5.Univ Western Australia, Sch Mech & Chem Engn |
| 推荐引用方式 GB/T 7714 | Xia, Tongqiang,Zhou, Fubao,Liu, Jishan,et al. A fully coupled coal deformation and compositional flow model for the control of the pre-mining coal seam gas extraction[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2014,72:138-148. |
| APA | Xia, Tongqiang,Zhou, Fubao,Liu, Jishan,Hu, Shengyong,&Liu, Yingke.(2014).A fully coupled coal deformation and compositional flow model for the control of the pre-mining coal seam gas extraction.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,72,138-148. |
| MLA | Xia, Tongqiang,et al."A fully coupled coal deformation and compositional flow model for the control of the pre-mining coal seam gas extraction".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 72(2014):138-148. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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