“两堵一注一排全筛网管”工艺及机制研究

doi:10.16265/j.cnki.issn1003-3033.2019.08.019

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (8): 118-123.doi: 10.16265/j.cnki.issn1003-3033.2019.08.019

“两堵一注一排全筛网管”工艺及机制研究

赵尤信¹, 齐庆杰¹ 教授, 吕有厂² 教授, 贾新雷¹, 张晋京²

1 辽宁工程技术大学安全科学与工程学院,辽宁阜新 123000;
2 炼焦煤资源开发及综合利用国家重点实验室,河南平顶山 467000

收稿日期:2019-04-09 修回日期:2019-06-22
作者简介:赵尤信 (1989—),男,山东临沂人,博士研究生, 研究方向为矿井灾害防治。E-mail:553663095@qq.com。
基金资助:
国家自然科学基金资助 (51704147); 国家重点研发计划重点专项资助项目(2018YFC0807900)。

Technology of "two plugging, one injection and one discharge of full net pipe" and its mechanism research

ZHAO Youxin¹, QI Qingjie¹, LYU Youchang², JIA Xinlei¹, ZHANG Jinjing²

1 College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
2 State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization,Henan Pingdingshan 467000,China

Received:2019-04-09 Revised:2019-06-22

摘要/Abstract

摘要： 为解决煤层瓦斯抽采体积分数低和抽采安全问题,分析抽采钻孔封堵段漏气原因和有效瓦斯抽采段压损机制。通过分析得到,漏气量与注浆压力、封堵长度成反比,与孔径大小和抽采负压成正比,且有效瓦斯抽采段全筛网管技术可减少沿程负压损失,在此基础上设计“两堵一注一排全网管”一体化装置。工程实践表明:与“两堵一注”封孔方法相比,在同等条件下“两堵一注一排全网管”封孔抽采瓦斯体积分提高了54.33%;“两堵一注一排全筛网管”比“两堵一注一排直管”在塌孔后平均瓦斯体积分数提高了125.82%。

关键词: 两堵一注一排全筛网管, 机制分析, 封堵段漏气, 沿程压能损失, 瓦斯抽采效率

Abstract: In order to solve the problem of low gas drainage concentration and ensure extraction safety in coal seams, the reason for gas leakage in the plugging section and the mechanism of pressure loss in effective gas extraction section were analyzed. The analysis showed that the amount of air leakage is inversely proportional to the grouting pressure and the plugging length, and is proportional to the pore size and negative pressure of gas extraction, and the whole screen mesh tube technology for the effective gas extraction section can reduce the negative pressure loss along the path. Based on this, the "two plugging, one injection and one discharge of full net pipe" integrated device was designed. The engineering practice shows that compared with the "two plugging and one injection" sealing method, under the same conditions, the gas volume by "two plugging, one injection and one discharge of full net pipe" sealing method increases by 54.33%, and that the average gas concentration by "two plugging, one injection and one discharge of full net pipe" method is 125.82% higher than that by "two plugs, one injection, one row of full net straight pipe" after hole collapse.

Key words: two plugging, one injection and one discharge of full net pipe, mechanism analysis, gas leakage in plugging section, pressure loss along path, gas extraction efficiency

中图分类号:

X936

赵尤信, 齐庆杰, 吕有厂, 贾新雷, 张晋京. “两堵一注一排全筛网管”工艺及机制研究[J]. 中国安全科学学报, 2019, 29(8): 118-123.

ZHAO Youxin, QI Qingjie, LYU Youchang, JIA Xinlei, ZHANG Jinjing. Technology of "two plugging, one injection and one discharge of full net pipe" and its mechanism research[J]. China Safety Science Journal, 2019, 29(8): 118-123.

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“两堵一注一排全筛网管”工艺及机制研究

Technology of "two plugging, one injection and one discharge of full net pipe" and its mechanism research

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