基于瓦斯自然涌出规律的有效抽采半径研究

doi:10.16265/j.cnki.issn1003-3033.2018.10.017

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (10): 98-104.doi: 10.16265/j.cnki.issn1003-3033.2018.10.017

基于瓦斯自然涌出规律的有效抽采半径研究

张明杰^1,2 教授, 贾文超³, 梁锡明², 李哲²

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 陕西省交通建设集团公司,陕西西安 710075

收稿日期:2018-06-08 修回日期:2018-08-20 出版日期:2018-10-28 发布日期:2020-11-20
作者简介:张明杰 (1968—),男,河南平舆人,本科,教授,硕士生导师,主要从事矿井瓦斯灾害预测与防治方面的科研与教学工作。E-mail:13939210555@163.com。

Research on effective extraction radius based on natural gas emission law

ZHANG Mingjie^1,2, JIA Wenchao³, LIANG Ximing¹, LI Zhe¹

1 Research Center of the National Gas Geology and Gas Prevention Engineering, Jiaozuo Henan 454003, China
2 School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China
3 Shaanxi Provincial Communication Construction Group, Xi'an Shaanxi 710075,China

Received:2018-06-08 Revised:2018-08-20 Online:2018-10-28 Published:2020-11-20

摘要/Abstract

摘要： 为确定穿层钻孔有效抽采半径,提出基于钻孔瓦斯自然涌出规律的测定方法。利用COMSOL Multiphysics软件分析钻孔周围瓦斯流动规律;根据模拟结果及煤层瓦斯流动理论,建立钻孔瓦斯自然排放影响圈内瓦斯含量、瓦斯涌出量和残存瓦斯量之间的函数关系式,提出以钻孔瓦斯自然涌出有效影响半径代替抽采负压影响下的有效抽采半径;在鹤壁三矿、十矿和古汉山矿进行现场实测。结果表明:有效抽采半径内,瓦斯压力呈线性分布;受钻孔周围煤体蠕变卸压影响,瓦斯自然涌出具有明显的阶段性特征,确定的有效抽采半径最大可达4 m,研究结果符合实际。

关键词: 有效抽采半径, 自然涌出, 数值模拟, 线性分布, 分段特征, 现场应用

Abstract: In order to determine the effective extraction radius of the boreholes through strata, a method based on the natural gas emission characteristics of boreholes was proposed. The gas flow law around boreholes was analyzed by COMSOL Multiphysics software. According to the simulation results and the theory of coalbed methane flow, a function relationship was established between gas content, gas emission and residual gas quantity in the gas natural discharge of borehole. It is proposed that the effective extraction radius under the influence of extraction negative pressure was replaced by that based on natural gas emission law of the borehole. Field measurements were carried out in Hebi No.3 Mine, No.10 Mine and Guhanshan Mine. The results show that the gas pressure is linearly distributed within the effective extraction radius, that the natural gas emission has obvious periodic characteristics under the influence of pressure relief due to creep deformation, and the effective extraction radius is up to 4m, and that the research result conforms with the reality.

Key words: effective drainage radius, naturally emission, numerical simulation, linear distribution, segmented features, field application

中图分类号:

X936

张明杰, 贾文超, 梁锡明, 李哲. 基于瓦斯自然涌出规律的有效抽采半径研究[J]. 中国安全科学学报, 2018, 28(10): 98-104.

ZHANG Mingjie, JIA Wenchao, LIANG Ximing, LI Zhe. Research on effective extraction radius based on natural gas emission law[J]. China Safety Science Journal, 2018, 28(10): 98-104.

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基于瓦斯自然涌出规律的有效抽采半径研究

Research on effective extraction radius based on natural gas emission law

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