中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (3): 82-86.doi: 10.16265/j.cnki.issn1003-3033.2020.03.013

• 安全工程技术 • 上一篇    下一篇

钻孔瓦斯连续流量法测定煤巷卸压带宽度研究

田世祥 讲师, 马瑞帅, 邹义怀, 许石青, 林华颖, 余照阳   

  1. 贵州大学 矿业学院,贵州 贵阳 550025
  • 收稿日期:2019-12-08 修回日期:2020-02-04 出版日期:2020-03-28 发布日期:2021-01-26
  • 作者简介:田世祥(1988—),男,贵州镇远人,博士,讲师,主要从事矿井瓦斯防治方面的教学与科研工作。E-mail:husttsx@163.com。
  • 基金资助:
    贵州省科技计划项目(黔科合支撑[2019]2887号,黔科合支撑[2020]4Y050号,黔科合平台人才[2017]5788)。

Measurement of stress-relief zone width of roadway by borehole gas continuous flow method

TIAN Shixiang, MA Ruishuai, ZOU Yihuai, XU Shiqing, LIN Huaying, YU Zhaoyang   

  1. College of Mining, Guizhou University, Guiyang Guizhou 550025, China
  • Received:2019-12-08 Revised:2020-02-04 Online:2020-03-28 Published:2021-01-26

摘要: 为准确测定煤巷工作面前方卸压带宽度,基于工作面前方煤体涌出的瓦斯流量与地应力之间的关系,提出钻孔瓦斯连续流量法测定卸压带宽度,并从理论上分析该方法的可行性;采用煤巷突出线预测装置在薛湖煤矿2303风巷测定钻孔瓦斯流量。研究结果表明:瓦斯流量曲线先增大后减小,瓦斯流量曲线峰值为卸压带边界,确定该工作面前方卸压带宽度为9~10 m;采用钻屑量与钻屑瓦斯解吸指标Δh2测定的工作面前方卸压带宽度为9.5~10 m,与钻孔瓦斯续流量法测定结果一致,验证了钻孔瓦斯连续流量法测定卸压带宽度的可靠性。

关键词: 突出, 地应力, 煤巷, 卸压带宽度, 钻孔瓦斯连续流量法

Abstract: In order to accurately measure the width of stress-relief zone ahead of roadway working face, borehole gas continuous flow method was proposed based on the relationship between gas flow discharged from coals and in-suit stress, and its feasibility was verified theoretically. Then, borehole gas flow was measured in 2303 ventilating roadway of Xuehu coal mine by using outburst prediction device. The results show that gas flow increases first and then decreases with its peak being the boundary of stress-relief zone, and the width of the zone ahead of working face is determined to be 9-10 meter. Meanwhile, that measured by using drillings amount and drillings gas absorption index Δh2 is 9.5-10 meter, consistent with results of borehole gas continuous flow method, therefore verifying its reliability in determining width of stress-relief zone.

Key words: outburst, in-situ stress, coal roadway, stress-relief zone width, borehole gas continuous flow method

中图分类号: