“刀形”工作面采至短巷时的瓦斯治理技术

The Technique for Gas Control When a "Knife"-shaped Face Retreats to the Point of a Short Road

1652(3)为潘一矿历史上第一个"刀形"工作面,工作面退采至短巷时遇到的风流短路及支架移走所留空间冒落易造成大量瓦斯积聚并涌向回风巷造成瓦斯超限等问题,通过建筑挡风墙、预留抽采管、施工高位钻孔、使用局扇供风等方法得以成功解决。

At the time when the 1652(3) knife-shaped face,the first of its kind on the mining history of Panyi Coal Mine,retreats to the point of a short roadway,excessive gas tends to accumulate and flows into the airreturn way causing the concentration of gas to rise above the allowable level due to short circuit of air flow and roof caving in the space left unsupported because of removal of supports.Through setting bayshon,laying gas drainage pipes in advance,drilling drainage holes in the air way above the short road and addition of ventilation fan,the problems encountered have been successfully tackled