Nonlinear Motion Law of Coalbed Gas Seepage under the Combined Effects of Stress and Temperature
Abstract
In consideration of the inward (outward) swelling deformation of coal body caused by temperature effect, permeability test of the loaded coal under different temperature conditions and different working conditions was performed with the self-made seepage equipment for thermo-fluid-solid-mechanical coupling of coal containing methane by Henan Province Key Lab of Gas Geology & Gas Control. The variation of coal permeability under the combined effects of stress field and temperature field was investigated, and the gas motion law in the coal samples was also tested. Furthermore, the variation equations of coal permeability under the combined effects of stress field and temperature field, as well as the motion equations describing the nonlinear gas seepage law in coal seams were established. The established equations were proved to fit well with the experimental data, which demonstrated that the motion equations and the research methods were both reasonable. As associated gas of coal, the gas is a kind of clean, efficient energy. Study on the seepage nonlinear motion law of gas in the coal seam is great significance to the mineral gas extraction and the utilization of energy.References
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[7]Li Zhiqiang, Xian Xuefu.: Study on experiment of coal permeability with temperature and stress changing: Journal of Liaoning Technical University (Natural Science)s(4)(2009)156-159.
[8]Liang Bing, Gao Hongmei, Lan Yongwei.: Theoretical Analysis and Experimental Study on Relation between Rock Permeability and Temperature: Chinese Journal of Rock Mechanics and Engineering24(12)(2005)2009-2012.
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[10]Yang Jianping, Chen Weizhong, Tian Hongming, et a.: Study of permeability evolutions in low permeability media under different stresses and temperatures: Rock and Soil Mechanics30(12) (2009)3587-3594.
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[12]ASTM.: Standard test method for permeability of rocks by flowing air:American society for the testing of materials. USA:ASTM(1990).
[13]Tao Yunqi, Xu Jiang, Peng Shoujian, et al.: Experimental study of influencing factor of porosity and effective stress of gas-filled coal: Rock and Soil Mechanics31(11)(2010)3417-3422.
[14]COMSOL A B.: COMSOL multiphysics version 3.2: Stockholm(2005) .
[15]LANGMUIR L.: The constitution and fundamental properties of solid and liquid: Journal of American Chemical Society36(2)(1975) 221-295.
[16]Li Zhiqiang, Xian Xuefu, Xu Longjun, et al.: Quantitative Predicting method of Coalbed Methane Relative High Permeability Region in Geo-stress and Geothermal Field: Journal of China Coal Society34(6)(2009)766-770.
[17]Hu Guozhong, Wang Hongtu, Tan Haixiang, et al.: Gas seepage equation of deep mined coal seams and Its application: Journal of China University of Mining &Technology18(4)(2008)183-486
Published
2014-05-18
How to Cite
LI, Bo et al.
Nonlinear Motion Law of Coalbed Gas Seepage under the Combined Effects of Stress and Temperature.
Journal of Power Technologies, [S.l.], v. 94, n. 2, p. 106--113, may 2014.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/558>. Date accessed: 24 apr. 2024.
Issue
Section
Energy Engineering and Technology
Keywords
Stress field, Temperature field, Nonlinear, Permeability, Pore pressure gradient, Effective stress
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