公开(公告)号：US20190024460A1

公开(公告)日：2019-01-24

申请号：US15757681

申请日：2016-07-11

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Qingsong ZHANG ,  Guangming PAN ,  Rentai LIU ,  Xiao ZHANG ,  Lei YANG ,  Kai WANG ,  Zhaofeng LI ,  Haitong SUI ,  Teng YANG ,  Chunguo LIU

IPC: E21B10/60 ,  E21B33/13 ,  E02D3/12

Abstract: An anti-collapse jet grouting drill bit with bi-directional rib wings, and a grouting consolidation including: a grouting pump connected to a high-pressure pipeline, which connects to an underground drill rig; an outer flat drill rod, connected with the underground drill rig; a sealing device, sheathed on the outer flat drill rod at the orifice of a drill hole, ensuring the outer flat drill rod is sealed with the orifice of the drill hole which connects to a jet grouting drill bit with bi-directional rib wings. The grouting pump jets slurry into the drill hole in a static osmotic manner through the jet rib wing drill bit, while the underground jet drill rig is rotated by the force of outer flat drill rod. The rotation of the jet slurry and the rib wings, repairs the hole wall by cutting chippings or squeezing the chippings back into the hole wall.

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.