1.grouting for the coal mine with seal is piling, 2.the special one-time ... , light,fast. 3.stopping water Mine Filling Packer(Liquid packer)Description:Grouting for the coal mine with seal is piling, grouting of ... plastic seal is mainly used for surface for the coal mining, when the openings for was cut off, protect ... cement or other media. Filling packer for rock reinforcement,coal mine stopping water