| 刘红星,孙占海,汤孟庆.超高压水力割缝强化抽采瓦斯技术研究[J].安徽建筑大学学报,2017,25(6):41-44 |
| 超高压水力割缝强化抽采瓦斯技术研究 |
| Study on the Technology of Hydraulic Slotting with Ultra-high Pressure for Enhanced Gas Drainage |
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| DOI：10.11921/j.issn.2095-8382.20170608 |
| 中文关键词: 水力割缝 超高压 瓦斯抽采纯量 抽采半径 |
| 英文关键词: hydraulic slotting ultra-high pressure gas drainage quantity extracting radius |
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| 中文摘要: |
| 水力割缝是一种重要的强化瓦斯抽采增透技术，现已开始在低透气性突出煤层应用。为了进一步
考察其实际效果，选取新集二矿1 煤组220112 工作面底抽巷实施了100 MPa 超高压水力割缝试验。试验
结果表明：割缝后，瓦斯抽采纯量平均0.77 m³/min，是未割缝钻孔的瓦斯抽采纯量(0.34 m³/min) 的2.26
倍；1 煤层组瓦斯抽采钻孔抽采30、60 天的抽采有效半径为5 m、7.5 m，极限抽采半径为8 m，相比水
力冲孔、未割缝钻孔抽采有效半径显著增加，超高压水力割缝强化抽采瓦斯技术具有广泛的应用前景。 |
| 英文摘要: |
| Hydraulic slotting is an important technology for enhanced gas extraction from low permeable coal
seams. In order to further investigate its actual effect, hydraulic slotting with 100 MPa ultra-high pressure
was applied to the boreholes for 1 coal seam group in the end-located drainage roadway of 220112 working
face at No.2 coal mine of Xinji. The test results showed that after the slotting, the gas extraction quantity
was average 0.77 m³/ min, and was 2.26 times of that of the un-slotting holes (0.34 m³/min). The effective
radius of extraction for 30 or 60 days of gas extraction in coal seam is 5 m and 7.5 m, and the radius of the
limit extraction is 8 m. And the effective radius is significantly increased compared with that of hydraulic
punching holes and original drilling holes. This shows that the technology of hydraulic slotting with ultra-high
pressure is very important. |
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