Abstract: In order to solve the problem of gas control in irregular working face adjoining Gob, taking the No.2327 working face in Jinyuan Mine as project background, the law of gas migration in gob was studied by theoretical analysis and field measurement. The gas concentration of open-off in No.2321 gob is 42.86%,which is about four times of the average gas concentration of the gob, which verifies the existence of the gas enrichment area in the gob. According to the law of gas emission during excavation, the degree of gas enrichment in gob was divided into three areas: solid coal area, gob gas enrichment area and gob gas non-enrichment area. Focusing on the gas enrichment area in gob, the measures of blocking gas gushing passage, upper corner drainage and high borehole drainage in gob are adopted. The gas concentration in return air roadway is range of 0.06%～0.12% and in upper corner is range of 0.14%～0.22%. The gas danger in the mining period is solved economically and effectively