Evaluation of the pre-drained coal seam gas quality

doi:10.1016/j.fuel.2014.04.051

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Evaluation of the pre-drained coal seam gas quality
	Xia, Tongqiang 1,2,4; Zhou, Fubao 1,3; Liu, Jishan 5; Gao, Feng 4
刊名	FUEL
	2014
卷号	130 页码:296-305
关键词	Coal seam gas Coal-gas interactions Gas-drained quality Compositional flow
ISSN号	0016-2361
DOI	10.1016/j.fuel.2014.04.051
英文摘要	Coal seam degasification through underground drilling and its efficiency are directly related to the safety of underground coal mining. The major problem of underground coal seam gas drainage is the rapid decay of gas concentration, which may lead to a low utilization ratio and many hazards, such as environmental pollution, spontaneous combustion of coal, gas combustion and gas explosion. Although coal-gas interactions have been comprehensively investigated, fewer studies consider the low-quality phenomenon (low gas flow and concentration) in the process of gas extraction due to the air leakage of the borehole. In this study, a fully coupled coal deformation and compositional flow model, which represents the important non-linear responses of the gas-drained quality due to the effective stress changes, was implemented into a finite element (FE) model to demonstrate the superiority and reliability of the model through a comparison with another theoretical models and a historical data matching. Subsequently, the susceptibilities of gas-drained quality associated with the intrinsic and extrinsic factors, incorporating the gas sorption, the porosity-fracture characteristics of coal, the sealing depth and the leakage flux, are quantified through a series of simulations. The simulation results revealed that (1) increasing/decreasing the CH4 Langmuir volume/pressure sorption parameter can improve the gas-drained quality, and (2) the leakage fracture characteristics around the borehole are the main factors affecting the gas-drained quality, and thus, increasing the coal permeability or extending sealing depth does not necessarily improve the gas-drained quality under the condition of serious leakage. This FE model and its simulation results can improve the understanding of the coal-gas interactions of underground gas drainage, providing a scientific basis for the evaluation of the gas-drained quality, the design and optimization of drainage systems, etc. (C) 2014 Elsevier Ltd. All rights reserved.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000336035600039
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3620]
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 Min & Technol, State Key Lab Coal Resources & Safe Min ; 4.China Univ Min & 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. Evaluation of the pre-drained coal seam gas quality[J]. FUEL,2014,130:296-305.
APA	Xia, Tongqiang,Zhou, Fubao,Liu, Jishan,&Gao, Feng.(2014).Evaluation of the pre-drained coal seam gas quality.FUEL,130,296-305.
MLA	Xia, Tongqiang,et al."Evaluation of the pre-drained coal seam gas quality".FUEL 130(2014):296-305.