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[1]王志明,孙玉宁,王永龙,等.瓦斯抽采钻孔动态漏气圈特性及漏气处置研究[J].中国安全生产科学技术,2016,12(5):139-145.[doi:10.11731/j.issn.1673-193x.2016.05.024]
　WANG Zhiming,SUN Yuning,WANG Yonglong,et al.Study on characteristics of dynamic leakage ring and leakage disposal of gas extraction borehole[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(5):139-145.[doi:10.11731/j.issn.1673-193x.2016.05.024]
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瓦斯抽采钻孔动态漏气圈特性及漏气处置研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年5期
页码:
139-145
栏目:
现代职业安全卫生管理与技术
出版日期:
2016-05-30

文章信息/Info

Title:
Study on characteristics of dynamic leakage ring and leakage disposal of gas extraction borehole
作者:
王志明1; 孙玉宁1; 王永龙1; 2; 王振锋1
（1.河南理工大学 能源科学与工程学院，河南 焦作 454000； 2. 煤炭安全生产河南省协同创新中心，河南 焦作 454000）
Author(s):
WANG Zhiming1;  SUN Yuning1;  WANG Yonglong1; 2;  WANG Zhenfeng1
(1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China; 2. Collaborative Innovation Center of Coal Work Safety, Jiaozuo Henan 454000, China)
关键词:
瓦斯抽采; 动态漏气圈; 漏气处置; 三囊袋封堵器; 流变
Keywords:
gas extraction;  dynamic leakage ring;  leakage disposal;  three-pouch closure device;  rheologyy
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2016.05.024
文献标志码:
A
摘要:
为了研究煤矿瓦斯抽采过程中钻孔瓦斯浓度衰减的问题，提出了动态漏气圈的概念，通过建立动态漏气圈数学模型，采用理论推导，数值模拟的方法分析了瓦斯抽采钻孔漏气圈的变化特性，并采用三囊袋封堵器在义安煤矿进行瓦斯抽采封孔及漏气处置工业性试验。研究表明，漏气圈半径随时间呈现动态变化，在瓦斯抽采初期急剧增大，随着抽采持续漏气半径增大趋势逐渐降低；煤体强度及钻孔所处的应力是影响漏气圈半径的重要因素，地应力越大漏气圈半径越大而煤体强度越大漏气圈半径越小；在整个抽采过程中漏气圈半径存在一个稳定值，在达到稳定值以前漏气圈半径呈现增加大趋势，研究得出了地应力及煤体强度影响下的该种趋势的特性；采用三囊袋封堵器对瓦斯抽采钻孔进行漏气处置可以有效改善瓦斯抽采效果，并且测得的瓦斯浓度变化曲线也证实抽采钻孔漏气圈的动态变化特性。
Abstract:
To study the problem of concentration decline for borehole gas in gas extraction process of coal mine, the concept of dynamic leakage ring was proposed. The change characteristics of borehole leakage ring in gas extraction were analyzed by the methods of theoretical derivation and numerical simulation through establishing the mathematical model of dynamic leakage ring, and the industrial tests on borehole sealing and leakage disposal of gas extraction were carried out by using the three-pouch closure device in Yi'an Coal Mine. The results showed that the radius of leakage ring presents a dynamic change with time, it increases sharply in the initial stage of gas extraction, but the increasing trend reduces gradually with the continuous extraction. The coal strength and the stress condition around the borehole are the important factors influencing the radius of leakage ring, the larger the crustal stress, the larger the radius of leakage ring, while the larger the coal strength, the smaller the radius of leakage ring. The radius of leakage ring exists a steady value in the whole extraction process, and it presents an increasing trend before reaching this value. The characteristics of this trend under the influence of crustal stress and coal strength were obtained. The leakage disposal on gas extraction borehole by using the three-pouch closure device can effectively improve the gas extraction effect, and the measured change curves of gas concentration also proved the dynamic change characteristics of borehole leakage ring.

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备注/Memo

备注/Memo:
“十二五”国家科技支撑计划课题项目（2013BAA03B02）；河南省高校基本科研业务费专项资金项目(NSFRF140135)
更新日期/Last Update: 2016-06-17