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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摘要运用自主研制的煤岩热流–固–耦合试验系统，以原煤为研究对象，进行不同静水压力条件下煤体瓦斯解吸试验。基于物理假设，以理想气体状态方程为桥梁，分析密闭环境中解吸瓦斯压力的变化规律。研究结果表明：随着静水压力的上升，封闭系统中煤体瓦斯压力升高0.277%～0.750%。煤中瓦斯压力的变化量δP由两部分组成：孔裂隙压缩引起瓦斯压力的变化量δPV和瓦斯解吸引起瓦斯压力的变化量δPd。随着静水压力的上升，瓦斯解吸引起的瓦斯压力变化量所占总瓦斯压力变化的比例减小，煤体中瓦斯解吸压力所占初始瓦斯压力的比例ω增大，煤与瓦斯突出等煤矿动力灾害也越容易发生。

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	刘超1
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	黄滚1
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	宋真龙1
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	李铭辉1
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关键词 ：岩石力学, 静水压力, 理想气体状态方程, 瓦斯压力, 解吸, 煤与瓦斯突出

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

引用本文:

刘超1，2，3，黄滚1，2，3，宋真龙1，2，3，李铭辉1，2，3，赵宏刚1，2，3，张驰1，2，3，边光1，2，3. 静水压力对原煤瓦斯解吸影响的试验研究[J]. 岩石力学与工程学报, 2016, 35(9): 1837-1843.
LIU Chao1，2，3，HUANG Gun1，2，3，SONG Zhenlong1，2，3，LI Minghui1，2，3，ZHAO Honggang1，2，3，ZHANG Chi1，2，3，BIAN Guang1，2，3. Experimental study on the influence of hydrostatic pressure on the gas desorption of coal. , 2016, 35(9): 1837-1843.

链接本文:

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

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