| A Review of Research on Cavity Growth in the Context of Underground Coal Gasification | |
Fang, Huijun1,2; Liu YW(刘曰武)3,4 ; Ge, Tengze1,2; Zheng TY(郑太毅)3; Yu, Yueyu1,2; Liu, Danlu1,2; Ding JG(丁玖阁)3; Li LL(李龙龙)3
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| Corresponding Author | Liu, Yuewu(lywu@imech.ac.cn) ; Zheng, Taiyi(zhengtaiyi@imech.ac.cn) |
| Source Publication | ENERGIES
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| 2022-12-01 | |
| Volume | 15Issue:23Pages:21 |
| Abstract | Underground Coal Gasification (UCG) is a leading-edge technology for clean and effective utilization of coal resources, especially for deep coal seams with a depth of more than 1000 m. Since the core operation place of UCG is the cavity, mastering the cavity growth pattern is a prerequisite to ensure the efficient and economic development of UCG. At present, scholars have conducted numerous research works on cavity growth, but the simulation conditions limit the research results. Hence, it is necessary to summarize and sort out the research results of cavity growth patterns, which contribute to deepening the understanding of UCG and pointing out the direction for subsequent research. First of all, this paper summarizes the development history of UCG technology and describes the cavity growth mechanism from chemical reactions and thermo-mechanical failure. Then, the research methods of cavity growth are summarized from three aspects: a field test, laboratory experiment, and numerical simulation. The results show that the appearance of the cavity is teardrop-shaped, and its growth direction is obviously related to the gas injection method, including the injection direction and rate. Subsequently, the factors affecting the cavity growth process are expounded from the geological factors (permeability, moisture content, and coal rank) and operating factors (temperature, pressure, gasification agent's composition, and gasification agent's flow pattern). Finally, the existing problems and development trends in the cavity growth are discussed. The follow-up research direction should focus on clarifying the cavity growth mechanism of the controlled-retractable-injection-point (CRIP) method of UCG in the deep coal seam and ascertain the influence of the moisture content in the coal seam on cavity growth. |
| Keyword | underground coal gasification cavity growth field test laboratory experiment numerical simulation |
| DOI | 10.3390/en15239252 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000896456200001 |
| WOS Keyword | PROCESS MODEL ; NUMERICAL-SIMULATION ; TEMPERATURE-FIELD ; SURROUNDING ROCK ; LIGNITE COAL ; UCG PROCESS ; COMBUSTION ; SITU ; PRESSURE ; SCALE |
| WOS Research Area | Energy & Fuels |
| WOS Subject | Energy & Fuels |
| Funding Project | Major special projects of CNPC science and technology ; [2019E025] |
| Funding Organization | Major special projects of CNPC science and technology |
| Classification | Q3 |
| Ranking | 1 |
| Contributor | Liu, Yuewu ; Zheng, Taiyi |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91226 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.China United Coalbed Methane Natl Engn Res Ctr Co, Beijing 100095, Peoples R China; 2.PetroChina Coalbed Methane Co Ltd, Beijing 100028, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Fang, Huijun,Liu YW,Ge, Tengze,et al. A Review of Research on Cavity Growth in the Context of Underground Coal Gasification[J]. ENERGIES,2022,15,23,:21. |
| APA | Fang, Huijun.,刘曰武.,Ge, Tengze.,郑太毅.,Yu, Yueyu.,...&李龙龙.(2022).A Review of Research on Cavity Growth in the Context of Underground Coal Gasification.ENERGIES,15(23),21. |
| MLA | Fang, Huijun,et al."A Review of Research on Cavity Growth in the Context of Underground Coal Gasification".ENERGIES 15.23(2022):21. |
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| Jp2022FA017.pdf（8516KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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