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针对马兰矿高瓦斯工作面上隅角瓦斯浓度偏高问题,结合其近距离煤层的地质及回采条件,通过在8~#煤下邻近层9~#煤层内布置底抽巷,既可作为后期开采9#煤时的回采巷道,有利于采掘衔接,又可截抽下邻近层卸压瓦斯和预抽本煤层瓦斯,再又抽采高位裂隙带内瓦斯和现采空区的瓦斯。马兰矿将该技术在18301工作面得以实践,取得了良好的抽采效果。
In view of the high concentration of gas in the upper corner of the high gas face of Malan Mine and by combining the geological and mining conditions of its close distance coal seam and the bottom draining lane in the adjacent coal seam 9 ~ When mining 9 # coal mining roadway, is conducive to mining and convergence, but also cut off the adjacent layer of pressure relief gas and pre-pumping the coal seam gas, and then pumping high fissure zone gas and the gas is the goaf. Malan mine this technology in the 18301 face to practice, and achieved good pumping effect.