综放工作面瓦斯分源抽放综合治理瓦斯技术

综放开采采高大,赋存在下分层及残留煤中的瓦斯不断涌向采空区的卸压裂隙带,在落煤和放顶煤时瓦斯涌出量会迅速增大,易造成工作面回风上隅角和回风巷道的瓦斯超限,甚至在回风隅角形成瓦斯积聚。胡家河矿井在生产实践中,采用采前预抽、上隅角埋管抽放、采后卸压抽放和高位瓦斯抽放巷抽放等瓦斯综合治理措施,可以解决矿井的瓦斯积聚问题,对类似矿井地质条件和开采工艺下矿井瓦斯治理具有重要的参考价值。

The comprehensive method by differentiating source drainage to control gas in sub-level caving mining

The gas continuously pour into fractured zone from lower slice and residual coal in sub-level caving mining.It is easy to overrun gas limit in upper corner and return airway when dropping and caving coal.The Hujiahe mine effectively control the gas gathering by the comprehensive method of pre-mining drainage,buried pipes at the upper corner,gas drainage in pressure-releasing zone,and high drainage roadway.it has reference value for the similar geological conditions and mining process.