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| Research on upper and lower combined gas control technology in Shanjiaoshu Coal Mine |
| Feng Yunfei, Zhang Jianlong, Li Ronglei |
| Guizhou Coalbed Methane Shale Gas Engineering Technology Research Center, Guiyang 550000, China |
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Abstract Gas poses a great threat to coal mine safety production. In order to realize the safe and efficient production of coal mine and the efficient utilization of resources, combined with the specific situation of 221015 working face of Shanjiaoshu Coal Mine in Guizhou, the combined gas control technology is used to analyze and study the effect of combined gas control. The practical results show that the gas concentration of surface drilling extraction can be stabilized at more than 90%, and the average concentration of underground gas extraction can reach 30%. Moreover, surface drilling extraction can improve the effect of underground extraction and ensure the safe and efficient production of Shanjiaoshu Coal Mine.
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