Abstract: Gas dynamic phenomenon occurred in 8^# and 9^# coal seam of Bao’an coal indusrtry during tunneling process is extrusion outburst.It is identified that 8^# and 9^# seam are coal and gas outburst seam and Bao’an coal mine is outburst mine.Taking 15^# coal seam as a protective layer mining(15^# coal seam was identified as non-outburst coal seam),due to the downward mining becomes ascending mining,the threat of coal and gas outburst is reduced.Using roof strike high drainage roadway and crossing hole to drain adjacent layers and goaf gas,8^# and 9^# coal seam are liberated and the regional outburst elimination is achieved.Taking 8^# and 9^# outburst seam to non-outburst seam,adopting false-inclined high drainage roadway,gas drainage roadway and crossing hole to drain initial mining gas,the problem of gas overrun in upper corner of 15^# seam working face is solved.