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Based on the elliptic paraboloid zone theory of mining fissure, a theoretical model was established, which means that the temporal and spatial form of excellent mining gas channel was corresponding to the advancing distance of working face, and the upper and lower boundary of excellent gas channel was determined in this study. Based on the geological conditions of Qinan Coal Mine of Huaibei, this study investigated the expanding rule of mining gas channel by UDEC as well as the control action of the channel acting on the pressure relief flow under the condition of coal seam group using field test. The numerical calculations show that the typical location, height and width of excellent mining gas channel are lower with the higher drawing speed. According to the numerical calculations, the design parameters of high drilling was optimized with the higher drawing speed for the field test in 34low2 working face, which verifies the feasibility of parameters optimization for high drilling, and also confirms the guidance and control effect of drawing speed on excellent gas channel proposed in this study. [ABSTRACT FROM AUTHOR]