我局现有9个矿16对生产井口,其中12对生产井口是由日伪时期开采的老井,经过恢复改造而简易投产的。矿区可采煤层12层,厚度0.6～1.7m,其中稳定煤层有2、5、7、9、10_1、10_2等6层。由于矿井开采年限长和矿井不断延深及范围逐渐扩大,机械化程度逐渐提高,矿井通风问题的难度越来越大。再加瓦斯涌出量逐渐递增,据近几年矿井瓦斯等级鉴定,全局16对生产井口 Our bureau has 9 mines and 16 pairs of production wellheads, among which 12 pairs of production wellheads are simple wells that were mined during the Puppet Period and are easy to put into operation after their restoration and reconstruction. Mining coal seam 12 layers, thickness 0.6 ~ 1.7m, of which there are stable coal seam 2,5,7,9,10_1,10_2 6 layers. Due to the long mine life and the continuous deepening of the mine and the scope of the gradual expansion of the gradual increase in the degree of mechanization, mine ventilation problems more and more difficult. Together with the gradual increase in gas emission, according to mine gas grade identification in recent years, the overall 16 pairs of production wellhead