公开(公告)号：US20220064347A1

公开(公告)日：2022-03-03

申请号：US17275998

申请日：2019-10-18

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Rentai LIU ,  Chenyang MA ,  Mengjun CHEN ,  Yankai LIU ,  Zhenjun WANG ,  Chunyu ZHANG ,  Xiuhao LI ,  Shaolong DUAN

IPC: C08F220/06 ,  C08K3/36 ,  E21D11/38

Abstract: A preparation method of an expansive polymer grouting material for treating high-pressure large-flow-rate karst water inrush includes: 1) adding a crosslinking agent to acrylic acid; then adding a polymer water-absorbent resin comonomer and performing a polymerization reaction to obtain a precursor; 2) adding an initiator to the precursor obtained in step 1), heating the mixture, performing a reaction to obtain a hydrogel, and grinding the hydrogel to obtain a primary polymer water-absorbent resin; 3) spraying a surface crosslinking agent onto a surface of the primary polymer water-absorbent resin obtained in step 2), and drying the product; and 4) preparing a suspension from an inorganic water conducting agent, spraying the suspension onto the product obtained in step 3), and performing drying to obtain the expansive polymer grouting material.