煤炭工程 ›› 2016, Vol. 48 ›› Issue (11): 42-45.doi: 10.11799/ce201611013

• 施工技术 • 上一篇    下一篇

顶板高承压含水层疏水降压可行性研究

刘基   

  1. 中煤科工集团西安研究院
  • 收稿日期:2015-11-03 修回日期:2015-12-08 出版日期:2016-11-10 发布日期:2016-12-16
  • 通讯作者: 刘基 E-mail:g73018606@126.com

Study on the feasibility of the dewatering and depressurizing of the high pressure roof water

  • Received:2015-11-03 Revised:2015-12-08 Online:2016-11-10 Published:2016-12-16

摘要: 为了消除煤层顶板砂岩高承压水的威胁,通过回采前在工作面切眼里段开展井下大型放水试验,观察不同疏放水量下的水位降深情况,从而得出了顶板高承压含水层疏水降压的可行性。结果表明:经过一段时间的疏放,总放水量从最大为223.2 m3/h(Y37-3)衰减至20~30m3/h|水压从最初的5MPa将至0.38MPa,降幅很明显,从而得出顶板高承压含水层疏水降压是可行的|同时,提出了矿井进行回采的标准,为后期工作面的疏放水工作奠定了基础。

关键词: 顶板, 砂岩, 高承压水, 放水试验, 疏水降压

Abstract: In order to eliminate the threat of the high pressure water in the sandstone on the seam roof, the feasibility of the dewatering and depressurizing was studied by carrying out a large dewatering test underground before mining work and observing the water drawdown under different water discharge. The results showed that the total water discharge decreased from 223.2 m3/h(Y36-3)to 20-30 m3/h and the water pressure from 5MPa to 0.38MPa after a period of time of dewatering. The decline is obvious, so the conclusion was dawn that the way of the dewatering and depressurizing was feasible. The standard for mining work was put forward, which would play a foundational role for the later work.

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