中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (5): 117-123.doi: 10.16265/j.cnki.issn1003-3033.2019.05.020

• 安全工程技术科学 • 上一篇    下一篇

以孔代巷瓦斯抽采布孔间距模拟及试验研究

年军1,2,3 副研究员, 高巍2,4, 李润芝2,4, 王伟1,2,3   

  1. 1 辽宁工程技术大学 安全科学与工程学院,辽宁 阜新 123000;
    2 煤科集团沈阳研究院有限公司,辽宁 抚顺 113122;
    3 辽宁工程技术大学 矿山热动力灾害与防治教育部重点实验室, 辽宁 阜新 123000;
    4 煤科集团沈阳研究院有限公司 煤矿安全技术国家重点实验室,辽宁 抚顺 113122
  • 收稿日期:2018-01-03 修回日期:2019-03-09 发布日期:2020-11-02
  • 作者简介:年军(1985—),男,辽宁沈阳人,硕士,副研究员,主要从事煤矿通风与安全方面的研究。E-mail:njmkws@163.com。

Simulation and experimental study on space between boreholes for gas drainage instead of roadway

NIAN Jun1,2,3, GAO Wei2,4, LI Runzhi2,4, WANG Wei1,2,3   

  1. 1 College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
    2 China Coal Technology and Engineering Group Shenyang Research lnstitute, Fushun Liaoning 113122, China;
    3 Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Fuxin Liaoning 123000, China;
    4 State Key Laboratory of Coal Mine Safety Technology, China Coal Technology and Engineering Group Shenyang Research lnstitute, Fushun Liaoning 113122, China
  • Received:2018-01-03 Revised:2019-03-09 Published:2020-11-02

摘要: 为解决借鉴埋管抽采技术经验或仅依据采空区瓦斯分布模拟来确定以孔代巷瓦斯抽采技术布孔间距可靠性不高的问题,以腾晖矿2-105工作面为试验区,先模拟不同布孔位置的采空区瓦斯浓度分布;再模拟采空区流场情况;根据采空区瓦斯浓度分布和流线轨迹变化趋势分析钻孔对上隅角瓦斯的影响,以此来确定以孔代巷瓦斯抽采布孔间距;最后将模拟确定的布孔间距应用到2-105工作面以孔代巷瓦斯抽采的现场试验中,并将现场数据与模拟结果进行对比验证。结果表明:通过模拟所确定的布孔间距能保证上隅角瓦斯体积分数一直被控制在0.8%以下,解决了2-105工作面上隅角瓦斯超限问题。

关键词: 以孔代巷, 大直径钻孔, 采空区, 瓦斯抽采, 布孔间距

Abstract: The space between boreholes for gas drainage replacing roadway is currently determined on the basis of the experience of buried pipe drainage technology or only on the simulation of gas distribution in goaf, and its reliability is not high. Therefore, with the 2-105 working face of Tenghui mine as an experimental area, the gas concentration distribution in goaf at different hole positions and then the goaf flow field were simulated successively. On account of the gas concentration distribution and the trend of the flow track change, the influence of boreholes on gas in upper corner was analyzed so as to decide the space between boreholes. Finally, the space determined through the simulation was applied to the field test of borehole gas drainage instead of roadway in 2-105 working face, and the field data and simulation results were compared and verified. The results show that the space determined through the simulation can ensure that the gas volume fraction in upper corner is always below 0.8%, thus solving the problem of corner gas overflow on the 2-105 working face.

Key words: hole replacing roadway, large diameter drilling, goaf, gas extraction, spacing of holes

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