[1]陆 壮,王 亮,聂 雷,等.不同变质程度煤体瓦斯解吸迟滞特征实验研究[J].西安科技大学学报,2020,(01):88-95.
 LU Zhuang,WANG Liang,NIE Lei,et al.Experimental study of methane desorption hysteresis characteristics of coal with different metamorphic degrees[J].Journal of Xi'an University of Science and Technology,2020,(01):88-95.
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不同变质程度煤体瓦斯解吸迟滞特征实验研究(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2020年01期
页码:
88-95
栏目:
出版日期:
2020-02-15

文章信息/Info

Title:
Experimental study of methane desorption hysteresis characteristics of coal with different metamorphic degrees
文章编号:
1672-9315(2020)01-0088-08
作者:
陆 壮12王 亮12聂 雷12高 瑾12
(1.中国矿业大学 安全工程学院,江苏 徐州 221116; 2.中国矿业大学 煤矿瓦斯与火灾防治教育部重点实验室,江苏 徐州 221116)
Author(s):
LU Zhuang12WANG Liang12NIE Lei12GAO Jin12
(1.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China; 2.Key Laboratory of Coal Mine Gas and Fire Prevention and Control,China University of Mining and Technology,Xuzhou 221116,China)
关键词:
吸附 解吸 迟滞特征 变质程度 孔隙结构
Keywords:
adsorption desorption hysteresis characteristics metamorphic degree pore structure
分类号:
TD 712
文献标志码:
A
摘要:
煤体瓦斯解吸过程与吸附过程相比不具有完全可逆性,解吸相对吸附存在迟滞特征,需要对瓦斯解吸迟滞特征及其相关影响因素进行系统研究。在合理选择拟合模型的基础上,利用煤体瓦斯吸附与解吸动力学实验装置分别开展了煤样在不同变质程度、不同含水率、不同温度和不同粒径下的瓦斯吸附和解吸实验,得到了瓦斯吸附和解吸曲线,计算了不同条件下煤体瓦斯的解吸迟滞系数。结果表明:随着变质程度增加,瓦斯解吸迟滞系数和迟滞面积先减小后增大,解吸迟滞程度呈现“U”型变化; 随着煤样水分含量增大,瓦斯解吸迟滞系数和迟滞面积减小,瓦斯解吸迟滞程度减弱; 随着实验温度升高,瓦斯解吸迟滞系数和迟滞面积减小,瓦斯解吸迟滞程度减弱; 随着煤样粒径减小,瓦斯解吸迟滞系数和迟滞面积减小,瓦斯解吸迟滞程度减弱。解吸迟滞特征会对瓦斯含量直接法测定和吸附常数测定产生负面影响。
Abstract:
The gas desorption process in coal is not completely reversible compared with the adsorption process.Desorption process has hysteresis characteristics and a study must be made systematically of such characteristics and the related influencing factors.Reasonable fitting models were selected in this paper,and the gas adsorption and desorption experiments were carried out under different metamorphic degree,water content,temperature and particle size through the device of gas adsorption and desorption dynamics.The gas adsorption and desorption curves were obtained and the desorption hysteresis coefficients of coal samples under these conditions were calculated.The results show that the hysteresis coefficient and hysteresis area of gas desorption decrease first and then increase with the increase of metamorphism degree,with a U-shaped curve exhibited.With the increase of moisture content of coal sample,hysteresis coefficient and hysteresis area of gas desorption decrease,and the hysteresis degree of gas desorption weakens.With the increase of experimental temperature,the hysteresis coefficient and hysteresis area of gas desorption decrease,and the hysteresis degree of gas desorption weakens.With the increase of coalparticle size,the hysteresis coefficient and hysteresis area of gas desorption increase,and the hysteresis degree of gas desorption strengthens.The desorption hysteresis effect is found to have negative effects on the direct determination of gas content and the determination of adsorption constant.

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备注/Memo

备注/Memo:
收稿日期:2019-11-30 责任编辑:李克永
基金项目:国土资源部煤炭资源勘查与综合利用重点实验室科技研发项目(KF2018-6); 陕西省重点研发技术项目(2017ZDXM-GY-075)
通信作者:姜鹏飞(1988-),男,吉林吉林人,讲师,E-mail:jiangpengfei123456@126.com
更新日期/Last Update: 2020-02-15