卸围压条件下含瓦斯煤渗透性演化试验研究

doi:10.16265/j.cnki.issn1003-3033.2017.08.020

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (8): 114-119.doi: 10.16265/j.cnki.issn1003-3033.2017.08.020

卸围压条件下含瓦斯煤渗透性演化试验研究

李晓艳^1,2, 孙光中^**3,4 讲师, 付江伟² 副教授

1 中南大学资源与安全工程学院,湖南长沙 410083;
2 中原工学院能源与环境学院,河南郑州 451191;
3 河南工程学院安全工程学院,河南郑州 451191;
4 河南省煤矿安全重点实验室培养基地,河南郑州 451191

收稿日期:2017-04-23 修回日期:2017-07-06 出版日期:2017-08-20 发布日期:2020-10-13
通讯作者: **孙光中(1982—),男,河南西华人,博士,讲师,主要从矿山岩体力学方面的教学与科研工作。E-mail: sgz228165@126.com。
作者简介:李晓艳(1987—),女,河南浚县人,博士研究生,研究方向为重金属污染土壤,安全人体学等。E-mail: 857445788@qq.com。
基金资助:
国家自然科学基金资助(51174082,51604091,51604311);河南省重点科技攻关项目(132102210485);河南省高等学校重点科研项目(17A440002)。

Experimental study on evolution of permeability of coal containing methane under confining pressure unloading condition

LI Xiaoyan^1,2, SUN Guangzhong^3,4, FU Jiangwei²

1 School of Resources and safety Engineering, Central South University, Changsha Hunan 410083, China;
2 School of Safety Energy & Environment Engineering, Zhongyuan University of Technology, Zhengzhou Henan 451191, China;
3 School of Safety Engineering,Henan Institute Engineering,Zhengzhou Henan 451191,China;
4 Key Laboratory of Coal Mine Safety Training Base in Henan Province,Henan Institute Engineering,Zhengzhou Henan 451191,China

Received:2017-04-23 Revised:2017-07-06 Online:2017-08-20 Published:2020-10-13

摘要/Abstract

摘要： 为探究蠕变过程煤体应力卸载瓦斯可抽采程度,用河南工程学院自行研制的含瓦斯煤热-流-固耦合三轴渗流试验装置对润东煤业3号煤层含瓦斯煤原煤样进行渗流测试,并进行渗透率模型的理论分析,对比试验数据与模型计算数据。结果表明:试验过程中轴压降起始于卸围压后,渗透率变化滞后于轴压降;渗透率在卸围压初期变化不大,随应变的增加,渗透率由慢慢减小到突然增加。卸围压过程中的渗透率与轴向应变变化具有一致性,且与时间符合指数函数关系。

关键词: 渗透率, 蠕变, 卸围压, 渗透率动态模型, 含瓦斯煤

Abstract: Seepage tests were done for containing gas coal samples from Rundong no.3 coal seam to explore the extraction degree of coal seam gas in theshort-time creep process. A theoretical analysis was made for the permeability after building a permeability model. The test data and the model calculation data were analyzed. The results show that the axial pressure drop is after unloading confining pressure and is followed by permeability change, that in the early stages of unloading, permeability changes slightly and reduces slowly with the increase of the strain, then increases suddenly, that there is good consistency between the axial strain and the permeability after unloading, and that both the permeability and the strain are a exponential function of time.

Key words: permeability, creep, unloading confining pressure, dynamic models of permeability, coal containing gas

中图分类号:

X936

李晓艳, 孙光中, 付江伟. 卸围压条件下含瓦斯煤渗透性演化试验研究[J]. 中国安全科学学报, 2017, 27(8): 114-119.

LI Xiaoyan, SUN Guangzhong, FU Jiangwei. Experimental study on evolution of permeability of coal containing methane under confining pressure unloading condition[J]. China Safety Science Journal, 2017, 27(8): 114-119.

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卸围压条件下含瓦斯煤渗透性演化试验研究

Experimental study on evolution of permeability of coal containing methane under confining pressure unloading condition

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