探矿工程-岩土钻掘工程Issue(7)：1-4,4.
松软煤层瓦斯抽采孔 PVC 管护壁技术应用研究
Application Study on Wall Protection Technology with PVC Pipe in Gas Drainage Hole in Soft Seams
摘要
Abstract
Geological structure is complex with soft seams and poor permeability in Zhaozhuang coal mine of Shanxi.Wall collapse of gas drainage hole caused by unstability leads to gas drainage channel blocking, low extraction rate and poor drainage effect.By the technology that drill pipe is kept at the completion of drilling construction and in which gas extrac-tion screen liner is lowered to protect the wall, gas drainage channel can be formed after drill pipe is lifted.The application results show that the pipe lowering efficiency is largely improved comparing with that of traditional drill casing technology. The pipe length is up to more than 98%of the hole depth, which is helpful to improve the efficiency of gas drainage and has great significance for coal mine safety.关键词
松软煤层/瓦斯抽采孔/护壁技术/PVC管Key words
soft seams/gas drainage hole/wall protection technology/PVC pipe分类
矿业与冶金引用本文复制引用
曹建明,宋斌,刘发义,金新,王建彬,侯红..松软煤层瓦斯抽采孔 PVC 管护壁技术应用研究[J].探矿工程-岩土钻掘工程,2014,(7):1-4,4.基金项目
“十二五”国家科技重大专项项目“山西晋城矿区采气采煤一体化煤层气开发示范工程” （）
