多粒度煤样瓦斯等温吸附解吸特征试验分析:以寺河煤矿3号煤为例

周伟; 袁亮; 薛俊华; 贺广会; 罗勇; 段昌瑞; 任波

doi:10.13272/j.issn.1671-251x.17277

多粒度煤样瓦斯等温吸附解吸特征试验分析:以寺河煤矿3号煤为例

doi: 10.13272/j.issn.1671-251x.17277

周伟^{1, 2},
袁亮^{2, 3},
薛俊华^{1, 2},
贺广会⁴,
罗勇^{1, 2},
段昌瑞^{1, 2},
任波^{1, 2}

1.
平安煤炭开采工程技术研究院有限责任公司，安徽淮南232001
2.
深部煤炭开采与环境保护国家重点实验室，安徽淮南232001
3.
安徽理工大学能源与安全学院，安徽淮南232001
4.
山西晋城无烟煤矿业集团有限责

基金项目:

国家重点研发计划资助项目（2016YFC0801402,2016YFC0801404）

国家自然科学基金资助项目（51427804）

详细信息

中图分类号: TD712
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出版历程
- 刊出日期: 2018-01-10

Experimental analysis of isothermal adsorption and desorption characteristics of gas in coal samples with multi grain sizes: A case study on No.3 coal in Sihe Coal Mine

ZHOU Wei^{1, 2},
YUAN Liang^{2, 3},
XUE Junhua^{1, 2},
HE Guanghui⁴,
LUO Yong^{1, 2},
DUAN Changrui^{1, 2},
REN Bo^{1, 2}

1.
Ping''an Coal Mining Engineering Technology Research Institute Co., Ltd., Huainan 232001, China
2.
State Key Laboratory of Deep Coal Mining and Environmental Protection, Huainan 232001, China
3.
Scho

摘要

摘要: 为研究吸附压力和粒度对煤样瓦斯解吸的影响，选取寺河煤矿3号煤为考察样本，采用瓦斯等温吸附解吸试验系统，考察了0.17～0.25，0.25～0.50，1～3 mm 3个粒度煤样在1，1.5，3 MPa吸附压力下的瓦斯解吸量和解吸速度变化特征。试验结果表明，在各吸附压力下，煤样瓦斯解吸量、初始解吸速度总体上均随吸附压力增大而增大，但0.25～0.50 mm粒度煤样瓦斯解吸量和解吸速度受吸附压力的影响程度较其他2个粒度煤样小；各粒度煤样在不同吸附压力作用下，较小粒度煤样的初始瓦斯解吸量和初始解吸速度总体上大于较大粒度煤样，但在解吸12 h后，1～3 mm粒度煤样在1.5，3 MP吸附压力下的瓦斯解吸量较其他2组煤样大。根据试验结果可得，增加煤样的吸附压力或降低煤样粒度，均会引起瓦斯解吸量和解吸速度的增加。
- 瓦斯吸附 /
- 瓦斯解吸 /
- 瓦斯等温吸附解吸 /
- 吸附压力 /
- 粒度 /
- 解吸速度
Abstract: In order to study influence of adsorption pressure and grain size of coal sample on coal gas desorption, the No.3 coal in Sihe Coal Mine was selected as samples, and variety characteristics of gas desorption amount and desorption speed of coal samples with 0.17-0.25, 0.25-0.50, 1-3 mm grain sizes were analyzed at 1, 1.5, 3 MPa adsorption pressure by use of a gas isothermal adsorption and desorption experiment system. The experimental results show that under different adsorption pressure conditions, the gas desorption amount of the coal samples and initial desorption speed increase with the increase of adsorption on the whole. However, the influence of adsorption pressure on gas desorption amount and desorption speed of coal samples with 0.25-0.50 mm grain size is smaller than the other two grain sizes. The initial gas desorption amount of coal samples with smaller grain sizes is more than the one of the coal sample with bigger grain size under different adsorption pressure conditions, and the initial desorption speed is faster. But the gas desorption amount of the coal sample with 1.0-3.0 mm grain size is more than the one of the others under 1.5, 3 MPa adsorption pressure condition. Therefore, increasing adsorption pressure of coal sample or reducing grain size would cause increase of gas desorption amount and desorption speed.
- gas adsorption /
- gas desorption /
- gas isothermal adsorption and desorption /
- adsorption pressure /
- grain size /
- desorption speed