Application on Comprehensive Gas Drainage Technology

In order to solve the mine gas dangers and improve the gas drainage rate,based on the mine gas deposit condition in Pingdingshan No.4 Mine,the paper analyzed the technique,parameters and results of the in-seam double directional borehole drilling,the high level borehole drilling and the high flow buried tube technology.Based on the feasibility analysis on the gas drainage results,the gas comprehensive drainage technology integrated with the in-seam gas drainage,high level borehole drainage and goaf gas drainage was applied.The applied results showed that the gas comprehensive drainage technology combined with multi gas drainage methods could make the gas drainage rate reached over 50% in Pingdingshan No.4 Mine,could have a gas comprehensive utilization and could have a coal and gas co-mining.