静水压力对原煤瓦斯解吸影响的试验研究

doi:10.13722/j.cnki.jrme.2015.1574

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Abstract Gas desorption of coal under different hydrostatic pressures in closed environment was studied based on the servo-controlled seepage equipment for thermal-hydrological- mechanical coupling of coal developed in-house. The variation of the gas desorption pressure in the confined environment was analyzed with the state equation of ideal gas as a bridge. With the increase of hydrostatic pressure，the pressure of gas in the closed system increases by 0.277%–0.750%. There are two parts in the change of gas pressure( )：the change of the gas pressure caused by the spatial change of porosity and fracture caused by the stress loading( ) and the change of the gas pressure caused by the gas desorption( ). With the increase of hydrostatic pressure，the proportion of decreases，and the proportion of gas desorption pressure in coal increases. As a result，the coal and gas outburst and other dynamic disasters are more prone to occur.

Key words： rock mechanics hydrostatic pressure state equation of ideal gas gas pressure desorption coal and gas outburst

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	LIU Chao1
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	3
	HUANG Gun1
	2
	3
	SONG Zhenlong1
	2
	3
	LI Minghui1
	2
	3
	ZHAO Honggang1
	2
	3
	ZHANG Chi1
	2
	3
	BIAN Guang1
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	3

Cite this article:

LIU Chao1,2,3, et al. Experimental study on the influence of hydrostatic pressure on the gas desorption of coal[J]. , 2016, 35(9): 1837-1843.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.1574 OR http://www.rockmech.org/EN/Y2016/V35/I9/1837

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