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为了考察板巷水力冲孔卸压增透强化抽放快速消突的效果,以义马煤业集团李沟矿21采区-105m集中巷为试验点,考察水力冲孔出煤量的大小、瓦斯抽放浓度变化与瓦斯抽放纯量的增加、冲孔前后瓦斯含量与瓦斯压力的的变化。结果表明:瓦斯压力由冲孔前的1.05MPa下降到冲孔后0.46MPa,瓦斯含量也由冲孔前的6.51m3/t下降到冲孔后3.82m3/t,使压力和含量值都降到了规定的临界值以下,消除了突出危险性。
In order to investigate the effect of hydraulic punching pressure intensification and intensification drainage of slab lane rapid elimination and sudden protrusion, take the -105m concentration lane of 21 mining area in Ligou Coal Mine of Yima Coal Industry Group as the test point, Gas concentration changes and gas drainage capacity increased, before and after punching gas content and gas pressure changes. The results show that the gas pressure decreases from 1.05MPa before punching to 0.46MPa after punching, and the gas content also decreases from 6.51m3 / t before punching to 3.82m3 / t after punching, so both the pressure and the content are reduced The threshold below the provisions of the elimination of the prominent danger.