A Review of Research on Cavity Growth in the Context of Underground Coal Gasification

doi:10.3390/en15239252

IMECH-IR > 流固耦合系统力学重点实验室

	A Review of Research on Cavity Growth in the Context of Underground Coal Gasification
	Fang, Huijun 1,2; Liu YW(刘曰武)3,4 ; Ge, Tengze 1,2; Zheng TY(郑太毅)3; Yu, Yueyu 1,2; Liu, Danlu 1,2; Ding JG(丁玖阁)3; Li LL(李龙龙)3
通讯作者	Liu, Yuewu(lywu@imech.ac.cn) ; Zheng, Taiyi(zhengtaiyi@imech.ac.cn)
发表期刊	ENERGIES
	2022-12-01
卷号	15 期号:23 页码:21
摘要	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.
关键词	underground coal gasification cavity growth field test laboratory experiment numerical simulation
DOI	10.3390/en15239252
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000896456200001
关键词[WOS]	PROCESS MODEL ; NUMERICAL-SIMULATION ; TEMPERATURE-FIELD ; SURROUNDING ROCK ; LIGNITE COAL ; UCG PROCESS ; COMBUSTION ; SITU ; PRESSURE ; SCALE
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
资助项目	Major special projects of CNPC science and technology ; [2019E025]
项目资助者	Major special projects of CNPC science and technology
论文分区	Q3
力学所作者排名	1
RpAuthor	Liu, Yuewu ; Zheng, Taiyi
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91226
专题	流固耦合系统力学重点实验室
作者单位	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
推荐引用方式 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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