不同变质煤的瓦斯解吸粒级效应及规律

doi:10.16265/j.cnki.issn1003-3033.2018.07.016

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (7): 95-101.doi: 10.16265/j.cnki.issn1003-3033.2018.07.016

不同变质煤的瓦斯解吸粒级效应及规律

闫江伟^1,2,3 副教授, 武磊^1,2, 王俊铭^1,2

1 河南省瓦斯地质与瓦斯治理重点实验室－省部共建国家重点实验室培育基地,河南焦作 454003;
2 河南理工大学安全科学与工程学院,河南焦作 454003;
3 煤炭安全生产河南省协同创新中心,河南焦作 454003

收稿日期:2018-04-06 修回日期:2018-06-10 出版日期:2018-07-28 发布日期:2020-11-25
作者简介:闫江伟(1979—),男,河南柘城人,博士,副教授,主要从事瓦斯地质、瓦斯治理等方面的研究。E-mail:gisyjw@hpu.edu.cn。
基金资助:
教育部创新团队发展支持计划(IRT16R22);河南省科技攻关重点项目(152102210105);河南省教育厅自然科学研究计划(2010B440004)。

Effect of particle size on methane desorption from different metamorphic coal samples

YAN Jiangwei^1,2,3, WU Lei^1,2, WANG Junming^1,2

1 Research Center of the National Gas Geology and Gas Prevention Engineering,Jiaozuo Henan 454003,China;
2 School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454003,China;
3 Collaborative Innovation Center of Coal Safety Production of Henan,Jiaozuo Henan 454003,China

Received:2018-04-06 Revised:2018-06-10 Online:2018-07-28 Published:2020-11-25

摘要/Abstract

摘要： 为揭示粒级对煤层瓦斯(甲烷)解吸特性的影响,开展物理模拟试验,研究无烟煤(高变质)和长焰煤(低变质)柱状煤样和颗粒煤样在不同吸附压力下瓦斯解吸量和解吸速率方面的差异。结果表明:甲烷自煤样整个解吸过程中,煤样变质程度与累计瓦斯解吸量、解吸速率整体正相关,粒煤的累计瓦斯解吸量始终大于柱煤,两者之差先增大后减小;相同变质程度等压力下,累计瓦斯解吸量、解吸速率表现出明显的粒级效应;0.5～1 mm与1～3 mm煤样粒级,在解吸量上即将到达极限粒度。

关键词: 瓦斯解吸, 粒级效应, 柱状煤, 颗粒煤, 模拟测试, 解吸规律

Abstract: In order to reveal the effect of particle size on gas methane desorption from coal seam,physical simulation experiments were carried out the difference of gas desorption capacity and desorption.Differences between the cylindrical coal sample and the granular coal sample of anthracite (high metamorphic) coal and those of long flame coal (low metamorphic) in the effects on the gas desorption amount and the desorption rate were studied under different adsorption pressure conditions.The results show that there is a positive correlation between both the cumulative gas desorption amount and the desorption rate and the coal's metamorphism in the whole desorption process,that the cumulative gas desorption amount from granular coal is always greater than that from column coal,and the difference between the two increases first and then decreases,that particle size has an obvious effect on both the cumulative gas desorption amount and the desorption rate under the same metamorphic degree and pressure,and that the two granular coal sample grades of 0.5-1 mm and 1-3 mm are about to reach the limit of granularity in the desorption amount.

Key words: gas desorption, particle size effect, cylindrical coal, granular coal, simulation test, desorption law

中图分类号:

X936

闫江伟, 武磊, 王俊铭. 不同变质煤的瓦斯解吸粒级效应及规律[J]. 中国安全科学学报, 2018, 28(7): 95-101.

YAN Jiangwei, WU Lei, WANG Junming. Effect of particle size on methane desorption from different metamorphic coal samples[J]. China Safety Science Journal, 2018, 28(7): 95-101.

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不同变质煤的瓦斯解吸粒级效应及规律

Effect of particle size on methane desorption from different metamorphic coal samples

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