煤炭工程 ›› 2014, Vol. 46 ›› Issue (8): 61-63.doi: 10.11799/ce201408020

• 生产技术 • 上一篇    下一篇

底板巷水射流网格式割缝强化增透技术研究及应用

邹全乐   

  1. 中国矿业大学
  • 收稿日期:2013-06-25 修回日期:2013-09-04 出版日期:2014-08-11 发布日期:2014-08-10
  • 通讯作者: 邹全乐 E-mail:756873156@qq.com

Research on strengthen permeability enhancement through waterjet rigid slotting and its application

  • Received:2013-06-25 Revised:2013-09-04 Online:2014-08-11 Published:2014-08-10

摘要:

为了考察水射流网格式割缝强化增透技术对增加煤层透气性、改善瓦斯抽采效果的有效性,在杨柳矿10412机抽巷实施现场试验。结果表明:高压水射流割缝通过形成卸压空间,促使煤体发生流变,提高了煤体的渗透性,促进瓦斯的解吸流动。通过割缝孔与普通孔组合布置掩护巷道掘进能够实现网格式强化增透及局部高效消突。钻孔内割缝可以强化钻孔的抽采效果,钻孔间割缝可以激活临近的普通孔。

关键词: 消突, 穿层钻孔, 割缝, 网格式, 增透

Abstract:

In order to investigate the effect of permeability enhancement and gas drainage of waterjet rigid slotting, field test was carried out in Yangliu mine 10412 extraction tunnel. The result shows that the high pressure water slotting can form pressure relief space, which leaves the coal mass rheology and the permeability enhanced. Gas desorption and flow are boosted. Grid strengthen permeability enhancement and local effective outburst elimination can be realized through the combined arrangement of slotting boreholes and ordinary boreholes. The effect of gas drainage is strengthened if slotting inside the boreholes and the adjacent ordinary boreholes are activated if slotting between the boreholes.

Key words: outburst elimination, crossing boreholes, slotting, grid, permeability enhancement