注浆法揭过突出煤层技术

-430总回风巷(西段)巷道揭过9煤层,分析了巷道施工过程中巷道周边围岩抗压强度变化、注浆加固机理及施工过程中顶板管理细节,先采用布置抽放钻孔降低煤层瓦斯含量消除突出危险;再利用抽放钻孔注浆及分阶段打眼注浆加固巷道围岩,提高煤体抗压强度;最后在超前支护条件下先喷浆封顶再栽棚腿的短注短掘、短掘短支方式进尺。注浆加固及顶板管理效果明显,取得了显著的经济效益。

Note Thick Liquid Law Has Uncovered Prominent Coal Bed Technology

-430 always returns to the wind lane(west section) the tunnel to uncover 9 coal beds,Has analyzed in the tunnel construction process the tunnel peripheral adjacent formation compressive strength change,Note thick liquid reinforcement mechanism and in construction process roof management detail,Uses the arrangement to pull out first puts the drill hole to reduce the coal bed gas content to eliminate the prominent danger,Again uses pulls out puts the drill hole note thick liquid and a minute stage drills the note thick liquid reinforcement tunnel adjacent formation,Enhances the coal body compressive strength,Finally is supporting and protecting under the condition the gunite to place an upper limit on first in advance plants the awning leg the short note to dig short again,Digs the short way to enter the ruler short.The note thick liquid reinforcement and the roof management effect are obvious,Has obtained the remarkable technical economic efficiency