煤炭工程 ›› 2017, Vol. 49 ›› Issue (4): 66-69.doi: 10.11799/ce201704021

• 研究探讨 • 上一篇    下一篇

基于裂隙区阶梯封堵的瓦斯压力测试技术研究

张敬军1,魏国营2   

  1. 1. 河南神火集团
    2. 河南理工大学
  • 收稿日期:2016-10-16 修回日期:2017-01-17 出版日期:2017-04-09 发布日期:2017-05-16
  • 通讯作者: 张敬军 E-mail:wmtshke@126.com

Study on The Technology of Measuring Seam Gas Pressure Based on variable diameter In fracture zones

  • Received:2016-10-16 Revised:2017-01-17 Online:2017-04-09 Published:2017-05-16

摘要: 为了解决深部复杂地质条件下瓦斯压力测试中存在的裂隙封堵问题,提出基于巷道围岩应力分布的阶梯式封孔技术,通过对裂隙区和塑性强化区进行多级封孔来提高测压准确性|依据煤岩弹塑性软化模型模拟计算了巷道开挖后周边围岩塑性区半径,并通过FLAC3D软件进行了模拟验证,为一级钻孔封堵深度提供了数据支持|在薛湖煤矿29采区进行了现场应用,结果表明:阶梯式封孔技术在测压时间上平均减少了29.4%,绝对时间节省了8.3d,在测压结果上平均提升了65.6%,测试结果更加接近煤层原始瓦斯压力,具有广泛应用价值。

关键词: 煤矿安全, 瓦斯治理, 瓦斯压力, 阶梯封孔

Abstract: In order to solve the problem of sealing fracture under complicated geological conditions in measuring seam gas pressure, the technology of gradually reducing sealing is proposed in the paper based on the tunnel surrounding rock stress distribution. The fracture zone and plastic enhanced areas of multistage sealing to enhance the accuracy of the pressure. According to the coal and rock elastic plastic softening model to simulate the excavation of tunnel surrounding rock plastic zone radius, simulations are carried out to validate by FLAC3D software which provides the data support for a borehole plugging depth. Field application is carried out in XueHu Coal Mine Area 29. The results show that the variable diameter sealing technology in measuring time reduced 29.4%, equivalent to about 8.3 days, in the manometric findings enhance 65.6%. The test results close to the original coal seam gas pressure, and the technology has wide application value.

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