吸附瓦斯含量对煤与瓦斯突出的影响与能量分析

doi:10.13722/j.cnki.jrme.2017.0559

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摘要煤层中高压瓦斯主要以吸附态为主，为了研究吸附瓦斯含量对煤与瓦斯突出的影响，利用吸附性依次增强的氦气、氮气、甲烷和二氧化碳模拟相同气压下吸附瓦斯含量的不同。将0.75 MPa的上述4种气体充入物理力学性质相同的型煤并充分吸附，模拟游离瓦斯含量相同、吸附瓦斯含量不同的煤体，考虑4种不同强度型煤开展16次瞬间揭露试验。试验发生9次持续时间1 s左右的突出现象，对于低强度型煤试验不吸附的氦气也发生突出现象；试验结果表明随吸附气体含量增加，型煤发生突出的风险增大，吸附气体含量越大其突出强度越大。提出吸附气体膨胀能的测定方法，根据突出能量公式计算发生突出的煤体弹性能、吸附及游离气体膨胀能等突出潜能和煤体破碎功、抛出功等突出耗能，突出潜能与突出耗能基本相等验证吸附气体膨胀能测定方法的合理性。能量分析表明参与突出过程的吸附气体膨胀能占总气体膨胀能的7.9%～32.3%，占突出潜能的6.5%～25.6%，且其占比随吸附气体含量增大而增大。研究成果为揭示、量化吸附瓦斯含量在突出中的作用提供参考和依据。

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	王汉鹏1
	张冰1
	袁亮1
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	李清川1
	李术才1
	薛俊华2
	周伟2
	周杰2

关键词 ：采矿工程, 煤与瓦斯突出, 吸附瓦斯, 瓦斯含量, 能量分析, 型煤试验

Abstract：The high pressure gas in coal is mainly in adsorbed state. In order to study the influence of adsorbed gas content on outburst，He，N2，CH4 and CO2 have adsorption in increasing order and were thus used to simulate the different adsorbed gas contents under the same pressure. The above four gases of 0.75 MPa were applied to the briquettes of the same properties to simulate the coal with the same free gas content and with different adsorbed gas contents. 16 tests were conducted to 4 kinds of briquettes with different strengths. 9 outburst phenomena occurred in these tests，and the test with He which cannot be absorbed also burst out. These test results show that the risk and the intensity of outburst increased when the adsorbed gas content increased. A method to determine the expansion energy of adsorbed gas was proposed. The elastic energy of coal，the expansion energy of adsorbed gas and free gas，the energy consumption of coal crushing and throwing power were calculated. The potential energy and energy consumption were basically equal，which proved the rationality of the measurement method of expansion energy of adsorbed gas. Energy analysis indicated that the expansion energy of adsorbed gas accounted for 6.5%–25.6% of the potential energy，and the ratio increased with the increase of adsorbed gas content.

Key words： mining engineering coal and gas outburst adsorption gas gas content energy analysis briquette test

引用本文:

王汉鹏1，张冰1，袁亮1，2，3，李清川1，李术才1，薛俊华2，周伟2，周杰2. 吸附瓦斯含量对煤与瓦斯突出的影响与能量分析[J]. 岩石力学与工程学报, 2017, 36(10): 2449-2456.
WANG Hanpeng1，ZHANG Bing1，YUAN Liang1，2，3，LI Qingchuan1，LI Shucai1，XUE Junhua2，ZHOU Wei2，ZHOU Jie2. Influence of adsorption gas content on coal and gas outburst and energy analysis. , 2017, 36(10): 2449-2456.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0559 或 http://www.rockmech.org/CN/Y2017/V36/I10/2449

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