Abstract: The 8101 working face of the Tashan Mine 4^# coal seam is high-intensity mining face, since the mining, gas concentration has been frequently overrun. In this paper, the gas resource and gas emission laws are measures. Through the determination, the gas comes from the coal wall and the cut-off-coal, which accounts for 90% of the total gas emission. Gas Emission from the zone between No. 50 support and No. 105 support is the maximum, which should be focused on.