高瓦斯矿井煤层瓦斯压力测定及抽采研究

Gas pressure measurement and extraction of coal seam in high gas coal mine

M28煤层埋藏较深,针对M28煤层石门揭煤前对其瓦斯压力、放散速度和坚固性系数的测定结果,表明M28煤层各项参数值均较大,回采过程中容易诱发复合动力灾害。通过稳流法测定了合理的封孔抽放瓦斯位置为11m,现场不同位置抽放瓦斯结果表明合理的封孔位置能够有效的提高瓦斯抽放浓度,从而大幅的降低煤层固有的瓦斯压力,进而消除瓦斯压力过大导致的复合动力灾害显现。

M28 coal seam buried deep, according to the M28 coal seam in Shimen coal uncovering of the gas pressure, the diffusion speed and protodyakonov coefficient of determination results show that the parameters of coal seam, M28 values are larger in the mining process is easy to induce compound dynamic disaster. The current method for the determination of the reasonable gas drainage hole sealing position is 11m, the scene in different locations of the gas drainage hole sealing results show that reasonable position can effectively improve the gas drainage concentration, thus greatly reduce the natural gas pressure of coal seam, and then eliminate the compound dynamic disaster of gas pressure is too large due to the show.