Based on the governance difficult circumstances of working face gas in upper corner, No. 2 Mine of Yungaishan Mine fully mechanized top corner gas management was taken as an example, in order to ensure the normal of upper corner gas in 22204 comprehensive working face mining recovery, special high gas drainage drilling field in upper corner and high drilling construction were set in 22204 return airway, which effectively controled gas in upper corner and provided effective technical reference for deep hole construction.