In order to ensure that the N1105 working face of Yuwu Coal Industry can maintain efficient and safe mining during the mining and recovery mining, combined with the underground gas geological conditions, measures such as Pre-drainage of bedding borehole before mining, release hole of open-hole cut roof, drainage of high drainage roadway, drainage of fractured zone in drilling field, gas drainage of buried pipe of long riser in goaf area were adopted, the maximum measured residual gas desorption content of coal seam in working face was 4.992 0 m3/t, which met the standard requireme-
nt of gas drainage of working face daily output of 6 001 ~ 8 000 t.