新型囊袋式带压封孔技术应用

摘要

为有效提高瓦斯抽采浓度，马兰煤矿采取了囊袋式带压封孔工艺，共施工本煤层钻孔443个，穿层抽放钻孔430个，通过与聚氨酯封孔技术的瓦斯抽采浓度及囊袋式封孔浓度相互进行比较，得出：囊袋式封孔技术瓦斯抽采浓度提高10％，囊袋式注浆封孔钻孔浓度变化有一定波动，主要是由抽采前期瓦斯浓度并不稳定及打钻过程中较早见矸导致的。%To improve the density of gas suction ,the author introduces the technique of sac online hole sealing , with 443 boreholes on base layer and 430 through-bed holes ,and concludes that the gas suction density with polyurethane hole sealing has increased by 10% while it fluctuates with sac hole sealing due to the unstable gas density in the prophase of drainage and the early gauge occurrence in the process of drilling .