煤炭工程 ›› 2015, Vol. 47 ›› Issue (11): 94-96.doi: 10.11799/ce201511030

• 研究探讨 • 上一篇    下一篇

薄煤层本煤层瓦斯抽放钻孔有效抽排放半径测试

王栓林   

  1. 煤炭科学技术研究院有限公司安全分院
  • 收稿日期:2014-07-30 修回日期:2015-07-07 出版日期:2015-11-12 发布日期:2015-12-07
  • 通讯作者: 王栓林 E-mail:wangshuanlin@163.com

Test of Drilling Gas Effective Drainage and Pumping Radius in Thin Seam

  • Received:2014-07-30 Revised:2015-07-07 Online:2015-11-12 Published:2015-12-07

摘要: 将钻孔瓦斯流量法和钻孔瓦斯压力降低法两种方法结合,通过现场施工瓦斯流量测试孔和压力测试孔的连续对比观测和分析,确定了朱家店煤矿4号煤层本煤层钻孔的有效抽排放半径,为薄煤层瓦斯抽放钻孔的布置和参数优化提供了基础参数。现场测试对比分析发现钻孔瓦斯流量法测试简单有效,技术经济方面优于瓦斯压力降低法。通过对瓦斯压力降低法测定的钻孔有效抽排放半径进行对比关联分析,结果表明钻孔的抽采负压对钻孔卸压范围〖DK〗(抽放半径〖DK〗)影响较小,可以考虑通过测定钻孔排放半径来推断钻孔抽放半径。

关键词: 薄煤层, 瓦斯流量法, 瓦斯压力降低法, 抽排放半径

Abstract: This article combined the two methods between flow method of gas drilling and drilling gas pressure drop method, by comparison site construction continuous observation and analysis of advanced testing and stress testing bore holes to determine the Zhu Jiadian No. 4 Seam coal seam drilling of the effective pumping discharge radius for thin seam gas drainage drilling layout and parameter optimization provides the basic parameters.

Key words: thin seam, drainage drilling, gas effective drainage and pumping radius

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