Comprehensive Gas Prevention and Control Technology of Fully Mechanized Coal Mining Face in High Gassy and Outburst Mine

In order to control the gas content of No.18205 fully mechanized coal mining face in Tunlan Mine which is a high gassy outburst mine, based on the Y ty pe ventilation system, a site experiment was conducted mainly on the gas drainage with the floor gas drainage gateway and secondary on the gas drainage with the bor eholes along the mining seam, the gas drainage in top neighbour seam and the gas drainage with pipe buried in isolation wall of the gateway retained along goaf.When above gas measures applied, the gas drainage rate reached over 70%, the ventilation discharged gas value in the coal mining face was only 5.93 m3/min, the relative g as emission value was 4.51 m3/t, and the values individually reduced by 76.4% and 70.7%.Thus the mine gas control capacity was generally improved.