高瓦斯矿井沿空留巷Y型通风瓦斯抽采技术实践

Practice of Gob-Side Entry Retaining for Y-type Ventilation Gas Extraction in High-gas Mine

运用沿空留巷Y型通风瓦斯抽采技术实现高瓦斯工作面无煤柱开采,改善通风方式,治理工作面上隅角与回风流中的瓦斯积聚。布置本煤层、邻近层抽采钻孔,采空区埋管抽采孔对工作面瓦斯进行抽采利用。瓦斯浓度与涌出量监测结果表明,瓦斯抽采效果良好,回风流中瓦斯浓度明显降低。

By gob-side entry retaining,Y-type ventilation gas extraction can realize without coal pillar extraction,improve ventilate methods and govern methane accumulation in up corner and returning air.The work face gas is extracted by borehole of the coal seam,adjacent coal seam and gob pipe laying extraction hole.Gas density and gush quantity monitoring results showed that effect of gas extraction is favorable and gas density of returning air drops obviously.