Goaf Gas Control and Utilization Technology in Zhangji Coal Mine

According to the difficulties of goaf gas control in the advanced mining face of the mine,in combined with the goaf gas emission features in the mine,a new gas control mode with the goaf gas controlled drainage was adopted to eliminate the goaf gas emission dangers due to the climate condition varied.Based on the mine gas utilization requirement,an optimized layout was conducted for the mine gas drainage system and an improved gas drainage and fire prediction and pre-warning system was established for the mine goaf.The utilization of the high density gas in the goaf would not only eliminate the gas emission and spontaneous combustion dangers in the goaf,but could fully utilize the gas resources.The coal and gas mining jointly could provide the rich experiences to control the gas in the goaf.