China Safety Science Journal ›› 2023, Vol. 33 ›› Issue (1): 70-79.doi: 10.16265/j.cnki.issn1003-3033.2023.01.0416
• Safety engineering technology • Previous Articles Next Articles
ZHAO Pengxiang1,2(), CHANG Zechen1,**(), LI Shugang1,2, ZHUO Risheng1, LIN Haifei1,2, JIN Shikui3
Received:
2022-08-10
Revised:
2022-11-09
Online:
2023-01-28
Published:
2023-07-28
ZHAO Pengxiang, CHANG Zechen, LI Shugang, ZHUO Risheng, LIN Haifei, JIN Shikui. Research and application of directional drilling sub area extraction in thick coal seam goaf[J]. China Safety Science Journal, 2023, 33(1): 70-79.
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Tab.3
Gas drainage effect of directional borehole with different arrangement parameters
钻孔参数/m | 抽采量/ (m3·min-1) | 瓦斯抽采 体积分数/% | 抽采纯量/ (m3·min-1) | 上隅角瓦斯 体积分数/% | |
---|---|---|---|---|---|
与回风巷中心 线水平距离 | 3 | 10 | 25~38 | 2.50~3.80 | 0.65~0.90 |
13 | 10 | 19~23 | 1.90~2.30 | 0.79~0.92 | |
23 | 10 | 15~18 | 1.50~1.80 | 0.87~1.13 | |
与煤层顶板 垂直距离 | 10 | 10 | 10~15 | 1.00~1.50 | 0.77~0.85 |
18 | 10 | 19~23 | 1.90~2.30 | 0.81~0.97 | |
26 | 10 | 28~35 | 2.80~3.50 | 0.93~1.09 |
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