HIGHLY EXPANDABLE GROUTING MATERIAL FOR HIGHLY EFFICIENT SEALING OF WATER GUSHING IN KARST PIPELINES, AND PREPARATION METHOD, METHOD OF USE, AND APPLICATION OF SAME

摘要

The present invention belongs to the technical field of sealing materials for subterranean engineering, and particularly relates to a highly expandable grouting material for highly efficient sealing of water gushing in karst pipelines, and a preparation method, method of use, and application of same The grouting material comprises high molecular weight polymer particles A and a cross-linking and curing liquid B. The high molecular weight polymer particles A have an embedded core-shell structure, wherein a primary high molecular weight water-absorbing resin serves as the core, and part of a gelling catalyst adheres to a surface of the core forming the shell, and part of the gelling catalyst penetrates into the core forming an embedded structure. Prior to use, the high molecular weight polymer particles A are stirred in the cross-linking and curing liquid B until sufficiently mixed. The resulting mixed solution can then be injected as a grouting material into fissures in a fracture zone of a rock mass. The grouting material of the present invention can efficiently treat high-pressure and large-flow karst water gushing, improve and increase gushing sealing efficiency, and further facilitate major subterranean engineering constructions.