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| Gas control methods and measures for working face corner under complex geological conditions |
| Wang Huihui |
| Beixinyao Coal Company, Jinneng Holding Coal Group，Xinzhou 036000, China |
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Abstract In order to solve the problem of over-limit gas in the corner angle on the working face of Beixinyao Mine 8201 working face, based on the original gas control by drilling and pipe insertion, CO2 pre-cracking and penetration technology, roof high drilling and upper corner buried pipe gas comprehensive extraction technology was used to control the gas on the working face, through the actual application on site, it showed that the average wind discharge gas volume was reduced from 17.35 m3/min to 9.74 m3/min. The average gas concentration decreased from 0.62% to 0.4%, the concentration decreased obviously, and there was no over-limit pre-warning phenomenon, which ensured the normal production progress of the working face.
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