Application of Comprehensive Gas Control Technology for Working Face of High-gas Coal Seam
In order to optimize the layout of working face,improve the recovery rate and alleviate the tension of mining and excavation,the layout of working face changed from U+L type to simple single U type.According to the occurrence of coal seam and the characteristics of gas emission,on the basis of rea-sonable ventilation system and sufficient air distribution,comprehensive gas control measures are also ad-opted.The excavation adopts the technical measures of excavation and drainage+release drilling,and the mining adopts the technical measures of unilateral bedding directional coal seam drilling+roof tendency di-rectional drilling+upper corner buried pipe gas extraction.Through above gas control technology,the gas problem in the mining process of single U ventilation working face in high gas coal seam is effectively solved,and the economic and social benefits are remarkable.
high gas coal seamsingle U type ventilation working facecomprehensive gas control technologydirectional drilling
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