煤炭工程 ›› 2019, Vol. 51 ›› Issue (4): 54-57.doi: 10.11799/ce201904013

• 生产技术 • 上一篇    下一篇

水力压裂技术在煤矿坚硬难垮顶板中的应用

苏波   

  1. 天地科技股份有限公司
  • 收稿日期:2018-04-23 修回日期:2018-06-22 出版日期:2019-04-20 发布日期:2019-04-28
  • 通讯作者: 苏波 E-mail:ccrisubo@sina.com

APPLICATION OF HYDRAULIC FRACTURING TECHNOLOGY IN HARD AND STABLE ROOF IN COAL MINE

  • Received:2018-04-23 Revised:2018-06-22 Online:2019-04-20 Published:2019-04-28

摘要: 基于煤矿坚硬难垮顶板现状及存在的问题,介绍了水力压裂技术及在井下的工业试验情况,该技术通过跨式膨胀性封孔器对压裂段进行封闭,利用高压水将封闭段进行压裂,将顶板不同位置岩体进行压裂,生成多条裂纹,最终形成裂纹网络,从而达到弱化顶板的目的。实验结果表明:随着工作面的推进,顶板依次分层、分次垮落,减弱老顶初次来压强度,保证工作面安全。水力压裂技术是一种安全、高效、绿色的控制坚硬难垮顶板的技术,有广阔的发展前景,将在煤炭行业得到广泛的应用。

关键词: 水力压裂技术, 坚硬难垮顶板, 初次来压强度, 裂纹扩展

Abstract: In view of the current situation and existing problems of hard and stable roof in coal mine, hydraulic fracturing technology is introduced. The technique is closed by a cross expansive packer and fracturing section is carried out by high pressure water, fracturing the rock mass in different positions of the roof and forming multiple cracks, and finally forming a crack network. In order to weaken the roof, with the advance of the working face, the roof lamination, sub collapse, the initial pressure strength of the old roof are weakened, and the safety of the working face is ensured. The crack growth can be seen from the construction site, and the opening pressure and expansion pressure of cracks in different fracturing sections can be directly read through the pressure curve.

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