我井现采煤层为高炭一层,厚度为0.38～0.52米,倾角为3～5度.直接顶厚为0.4～0.8米,其上有煤线(背影炭)厚为0.1米左右(沼气主要来源).属高沼气矿井.煤层无自然发火危险.我井过去一直采用采区前进、区内后退、走向长壁式无煤柱开采,中央并列式通风.采区采用U型通风方式.1978年以来,为了适应机械化和集中生产的通风需要,将通风方式改为中央边界式.采区实行Y型通风,获得良好的效果. The well is a high-carbon coal seam with a thickness of 0.38 ~ 0.52m and an inclination of 3 ~ 5 degrees. The direct top thickness is 0.4 ~ 0.8m, and the coal line (backchamber) is about 0.1m thick The main source of biogas) .Is a high biogas mine.Seam without spontaneous combustion danger.In the past I have been using the mining area forward, the area back to the long-wall non-pillar mining, the central parallel ventilation.The mining area using U-ventilation Since 1978, in order to meet the ventilation needs of mechanization and centralized production, the ventilation mode has been changed to the central boundary type, and Y ventilation has been adopted in the mining area to obtain good results.