低温变温条件下煤吸附瓦斯过程研究

doi:10.16265/j.cnki.issn1003-3033.2019.10.019

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (10): 124-129.doi: 10.16265/j.cnki.issn1003-3033.2019.10.019

低温变温条件下煤吸附瓦斯过程研究

马树俊¹, 王兆丰^1,2 教授, 任浩洋³, 韩恩光¹, 王彬¹

1 河南理工大学安全科学与工程学院,河南焦作 454003;
2 煤矿灾害预防与抢险救灾教育部工程研究中心,河南焦作 454003;
3 山东管理学院机电学院,山东济南 250357

收稿日期:2019-07-03 修回日期:2019-09-06 出版日期:2019-10-28 发布日期:2020-10-27
作者简介:马树俊 (1995—),男,河南濮阳人,硕士研究生,主要研究方向为煤矿瓦斯灾害预测与防治方面。E-mail:2536623328@qq.com。
基金资助:
国家自然科学基金资助(51274090);河南省高校科技创新团队支持计划(17IRTSTHN030);河南省高等学校重点科研项目(19B440002)。

Study on gas adsorption process of coal at low and variable temperature

MA Shujun¹, WANG Zhaofeng^1,2, REN Haoyang³, HAN Enguang¹, WANG Bin¹

1 School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China;
2 Ministry of Education Engineering Center of Mine Disaster Prevention and Rescue, Jiaozuo Henan 454003, China;
3 School of Electro-mechanical, Shandong Management University, Ji'nan Shandong 250357, China

Received:2019-07-03 Revised:2019-09-06 Online:2019-10-28 Published:2020-10-27

摘要/Abstract

摘要： 为保证煤层瓦斯含量测定结果的可靠性和准确性,引入低温冷冻取芯技术,利用高低温吸附试验装置,开展低温变温条件下煤样吸附瓦斯全过程试验研究,并分析降温过程中煤样中瓦斯吸附量变化特征。研究结果表明:在程序降温过程中,煤样罐内煤样温度先缓慢下降后趋于稳定,煤样温度变化集中在前3 h,持续一段时间,3 h后基本趋于稳定,与外界环境温度保持一致;试验温度降低过程中,瓦斯吸附量呈现升高-降低交替变化(总体趋势为升高)的特性,随温度的稳定趋于稳定;瓦斯吸附量降低阶段基本呈线性变化趋势,吸附量下降速率先增大后减小。

关键词: 煤体瓦斯, 低温变温, 煤样温度, 吸附量变化, 线性方程

Abstract: In order to ensure reliability and accuracy of measured results of coal seam gas content, freezing core sample technology was introduced, an experimental study on coal gas adsorption process was conducted at low temperature and variable temperature by using high and low temperature adsorption test device, and variation characteristics of gas adsorption capacity during cooling process was analyzed. The results show that during programmed cooling process, temperature of coal samples in tanks slowly decreases first and then tends to be stable, and these changes generally happen in the first three hours after which temperature will maintain stable and basically close with that of external environment. During experimental cooling process, adsorption capacity would increases and decrease alternately (increase for general trend) before it achieves a stable status along with stability of temperature. It is also found that adsorption capacity decrease stage basically shows a linear change trend with a decline rate increasing first and then decreasing.

Key words: coal gas, low and variable temperature, coal sample temperature, change of adsorption capacity, linear equation

中图分类号:

X936

马树俊, 王兆丰, 任浩洋, 韩恩光, 王彬. 低温变温条件下煤吸附瓦斯过程研究[J]. 中国安全科学学报, 2019, 29(10): 124-129.

MA Shujun, WANG Zhaofeng, REN Haoyang, HAN Enguang, WANG Bin. Study on gas adsorption process of coal at low and variable temperature[J]. China Safety Science Journal, 2019, 29(10): 124-129.

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低温变温条件下煤吸附瓦斯过程研究

Study on gas adsorption process of coal at low and variable temperature

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