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[1]刘彦伟,张加琪,刘明举,等.水分对不同变质程度煤粒瓦斯扩散系数的影响[J].中国安全生产科学技术,2015,11(6):12-17.[doi:10.11731/j.issn.1673-193x.2015.06.002]
 LIU Yan-wei,ZHANG Jia-qi,LIU Ming-ju,et al.Influence of moisture content on gas diffusion coefficient of coal particles with different metamorphic degree[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(6):12-17.[doi:10.11731/j.issn.1673-193x.2015.06.002]
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水分对不同变质程度煤粒瓦斯扩散系数的影响
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年6期
页码:
12-17
栏目:
学术论著
出版日期:
2015-06-30

文章信息/Info

Title:
Influence of moisture content on gas diffusion coefficient of coal particles with different metamorphic degree
作者:
刘彦伟123张加琪12刘明举12李亚鹏12
(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)
Author(s):
LIU Yan-wei123 ZHANG Jia-qi12 LIU Ming-ju12 LI Ya-peng12
(1. Henan Province Key Laboratory of Gas Geology and Gas Control, State Key Laboratory Breeding Base of Provincial and MOE Jointed Established, Jiaozuo Henan 454003, China;2. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China; 3. Collaborative Innovation Center of Coal Work Safety in Henan Province, Jiaozuo Henan 454003, China)
关键词:
水分变质程度瓦斯扩散系数瓦斯扩散机理
Keywords:
moisture content metamorphic degree gas diffusion coefficient gas diffusion mechanism
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2015.06.002
文献标志码:
A
摘要:
为了研究水分对不同变质程度煤粒瓦斯扩散系数的影响,利用自制设备,对不同煤阶的干燥煤、原煤、湿煤和平衡水煤样进行瓦斯吸附-解吸-扩散实验,分析扩散过程中不同时间段内水分与变质程度两个因素对扩散系数的影响。结果表明:水分的增加,导致瓦斯扩散系数随时间衰减程度变小。寺河矿干燥煤粒和平衡水煤粒在前120min内扩散系数较前5min分别减小了58.75%和53.2%;随着水分的增大,各变质程度煤样的瓦斯扩散系数比值增大。120min内干燥无烟煤扩散系数分别为瘦煤、气肥煤的1.04和2.37倍,平衡水无烟煤扩散系数分别为瘦煤、气肥煤的1.15和2.44倍;随着水分的增加,各煤阶瓦斯扩散系数减小幅度不同,且随着变质程度的减小,扩散系数的减小程度有变大趋势,前5min内随着水分从干燥煤增加到平衡水煤样,扩散系数减小幅度从无烟煤的72.77%增大到了气肥煤的83.49%。
Abstract:
In order to study the effect of moisture content on gas diffusion coefficient of coal particles with different metamorphic degree, the gas absorption, desorption and diffusion process of dry coal, raw coal, wet coal and equilibrium water coal samples with different coal ranks were experimental studied by using the self-made instrument. The influence of moisture content and metamorphic degree on diffusion coefficient in different period of diffusion process was analyzed. The results showed that the increase of moisture content leads to the attenuation degree of gas diffusion coefficient with time becoming smaller. The diffusion coefficients of dry and equilibrium water coal samples from Sihe coal mine decrease by 58.75% and 53.2% respectively in 120 min comparing with that in 5 min. With the increase of moisture content, the gas diffusion coefficient ratio of each coal sample with different metamorphic degree increases. The diffusion coefficient of dry anthracite is 1.04 and 2.37 times of lean coal and gas fat coal respectively in 120 min, and the diffusion coefficient of equilibrium water coal is 1.15 and 2.44 times of lean coal and gas fat coal respectively. The decrease range of gas diffusion coefficient with different metamorphic degree is different with increase of moisture content, and the decrease degree of diffusion coefficient has an enlarging trend with the decrease of metamorphic degree. The decrease range of diffusion coefficient increases from 72.77% of anthracite to 83.49% of gas fat coal with the moisture content increase from dry coal to equilibrium water coal in the first 5 min.

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备注/Memo

备注/Memo:
国家自然科学基金面上项目(51374095);省部共建国家重点实验室培育基地(河南理工大学)开放基金(WS2012B02);河南理工大学博士基金(B2013-005)
更新日期/Last Update: 2015-06-30