沙曲矿北翼风井揭过煤层瓦斯含量及瓦斯压力测定技术

Measurement Technique of Gas Content and Pressure in Cut through Coal Seam in North Air Shaft of Shaqu Coal Mine

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。

The coal seam has high gas with outburst danger in Shaqu Coal Mine.The main seam in North air shaft will be mainly cut through is the No.3＋4 and No.5 thick coal seam.In order to ensure the safety construction while coal seam cut through in the air shaft,the gas content and pressure in coal seam must be mastered accurately.The measured results show that the gas content in No.3＋4 and No.5 coal seam are 11.56 m^3/t and 14.74 m^3/t respectively,and the gas pressures are 1.5 MPa and 2.4 MPa.The results show that the No.3＋4 and No.5 coal seam are all high gas with outburst danger,and the measures of gas drainage and pressure-relief must be made to ensure the safety construction so that the north air shaft can cut through the coal seam.