泥浆护壁、全程套管钻进工艺在长距穿层抽采钻孔的应用

The Research and Application On The Ddrilling Technology With Slurry Wall and Whole Process Casing Pipe Used In Long Distance Wear Layers Drilling Drainage

为解决平煤股份十矿戊8-9-20230工作面回采期间上隅角瓦斯问题,采用泥浆护壁、全程套管钻进工艺施工长距离穿层钻孔抽采采空区瓦斯,成功穿透丁组煤层裂隙发育区域,钻孔联网后最高单孔浓度91%,杜绝了采面上隅角瓦斯超限事故,取得了预期的安全、经济效益。

In order to solve the gas problem in upper comer of 20230 working face during mining period,the author applies drilling technology with slurry wall and whole process casing pipe while constructing,long distance and wear layers drilling to drain gas in the goaf successfully penetrates the coal fissure-developed zone in Group Ding coal seam,the highest concentration per borehole is 91% after.lt avoids the gas acci-dent in upper corner of the mining face,obtaines the anticipative economic benefit with the safe performance,