底抽巷“一巷三用”煤与瓦斯共采技术

Simultaneous Exploitation Technology of Coal and Gas in Bottom Pumping Tunnel of One Roadway with Triple Purposes

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 gas concentration in the upper comer of the high gas working face of Malan Mine, combined with the geological and mining conditions of the close coal seams, the bottom pumping alley in 9# coal seam near 8# coal can be used as the mining roadway after mining 9# coal, which is not only conducive to mining-excavation replacement, but also cuts off the pressure re- lief gas of adjacent layer and pre-pumping the coal seam gas, and then pumping the gas in high cracks zone and the existing goal. This technology is applied to Malan Mine 18301 working face, and achieves a good mining effect for the safety of mining face.