沙曲煤矿属于高瓦斯突出矿井。北翼风井所要揭过的主要煤层为3+4#和5#厚煤层,为了保证风井揭煤的安全施工,必须准确掌握两层煤的瓦斯含量和瓦斯压力。测定结果为:3+4#煤层相对瓦斯含量为11.56 m3/t,5#煤层为14.74 m3/t;3+4#煤层瓦斯压力为1.5 MPa,5#煤层为2.4 MPa。结果表明这两层煤为高瓦斯突出煤层,要保障安全揭煤必须采取瓦斯抽放和卸压措施,满足防突细则后方可实施揭煤工程。 Shaqu mine belongs to high gas outburst mine. The main coal seam to be exposed by the northern wing is the 3 + 4 # and 5 # thick coal seams. In order to ensure the safe construction of the coal in the shaft, the gas content and gas pressure of the two layers of coal must be accurately grasped. The results are as follows: the relative gas content of No.3 + 4 # coal seam is 11.56 m3 / t, that of No.5 seam is 14.74 m3 / t; that of No.3 + 4 # coal seam is 1.5 MPa and that of No.5 seam is 2.4 MPa. The results show that the two layers of coal are high-gas outburst coal seam. To ensure the safety of coal uncovering, gas drainage and pressure relief measures must be taken to meet the requirements of preventing outbreaks before the coal uncovering project can be implemented.