突出煤型煤全应力–应变全程瓦斯渗流试验研究

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Abstract Based on the briquette specimens of the outburst coal seam K1 of typical coal and gas outburst mine of Sanhui a mine of Tianfu Coal Industry Co.，Ltd. in Chongqing，the experimental study of gas seepage law of outburst coal briquettes in complete stress-strain process under continuous loading is conducted by fluid-solid-heat coupling with triaxial servo-controlled seepage system of coal containing gas. The study results show that gas flow is tightly related with the damage deformation of the outburst coal briquettes during the complete stress-strain process. Gas flow firstly decreases gradually with the increase in axial strain，but it starts to rise after the yielding point of the complete stress-strain process of outburst coal briquettes；and the increasing rate of gas flow also enlarges after the peak point. On the other hand，the gas flow decreases primarily when the coal sample is volume compressed and then reverses to increase after the sample starts on dilatancy. The increasing range of gas flow enlarges after failure phase. The relationship between gas flow and axial strain can be expressed as a quadratic function and the gas flow decreases with the increasing confining pressure.

Key words： rock mechanics outburst coal briquette complete stress-strain gas seepage discharge

Received: 10 August 2009

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	Articles by authors
	JIANG Changbao1
	YIN Guangzhi1
	2
	LI Xiaoquan1
	CAI Bo1

Cite this article:

JIANG Changbao1,YIN Guangzhi1,2, et al. EXPERIMENTAL STUDY OF GAS PERMEABILITY OF OUTBURST COAL BRIQUETTES IN COMPLETE STRESS-STRAIN PROCESS[J]. , 2010, 29(S2): 3482-3487.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3482

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