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- W2890140435 abstract "Gas extraction cycle is too long in low-permeability coal seam. In order to solve the problem, the basic principle about gas drainage drilling for gas injection technology is studied to increase permeability. And the mathematical model is established. Gas is injected into the low-permeability coal seam by numerical simulation. The results indicate that the best condition is a negative pressure drainage at 26 kPa and a gas injection pressure at 0.6 MPa in the vertical direction and in the horizontal direction of the injection hole. In Shanxi Daping Coal Mine 3113 working face, the field test is implemented. As a result, the test is successful. During the 14 d gas injection constantly, gas content of coal seam is reduced from 12.33 m 3 /t to 7.12 m 3 /t, greatly reducing the risk of coal and gas outburst elimination time required." @default.
- W2890140435 created "2018-09-27" @default.
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- W2890140435 date "2018-09-12" @default.
- W2890140435 modified "2023-09-25" @default.
- W2890140435 title "Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam" @default.
- W2890140435 cites W2029463552 @default.
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- W2890140435 doi "https://doi.org/10.1155/2018/1912383" @default.
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