【摘要】 介绍了ＺＹＦ型钻孔液压封孔器的研制、实验室模拟试验及现场工业性应用试验情况。实践证明，该封孔器封孔性能好、降尘效果明显，可广泛应用于煤矿瓦斯抽放孔和其它工程用孔的施工中。更多还原

【Abstract】 Abstract The development,lab analog test and field test of Model ZYF hydraulic hole packer are presented in the paper.It is demonstrated by practice that the hole packer,with good performanceed in hole packing and dust suppression,can find wide application in the construction of boreholes for gas drainage in coal mines and other engineering.更多还原