Abstract:This paper takes Xing’an Coal Mine in Yuci, Shanxi Province as an engineering case, predicting the stoping working face, advancing working face, production mining area and the mine gas emission rate in the mine by different-source prediction model. The theoretical calculation and prediction results show that: during the stoping of No.15lower coal seam, the gas gushing quantity of gas emission from the stoping working face are mainly composed of extracting seam and then the adjacent seam. The compositions of the is mainly composed of open layer and then the adjacent layer. During the mining period of phases 1, 2, 3 and 4, the average gas emission from extracting seam accounted for 93.77%, and the from the adjacent seam accounted for 6.23%. For the gas emission compositions of stoping area, during the mining from phase 1 to phase 4, the average gas emission of stoping face, advancing face and mined-out area accounted for 56.88%, 19.99% and 23.13% respectively; and for the gas emission compositions of mine, during the mining from phase 1 to phase 4, the average gas emission of production mining area accounted for 83.38%, and of the mined area accounted for 16.62%. The prediction results can provide theoretical guidance for the application and engineering practice of gas extraction technology in Xing’an Coal Mine.
