Chemical grouting material for coal-rock mass water shutoff and reinforcement and preparation method thereof

Abstract

The invention belongs to the field of chemical synthesis, and particularly relates to a novel chemical grouting material for coal-rock mass water shutoff and reinforcement and a preparation method thereof. The chemical grouting material provided by the invention is prepared by mixing a component A and a component B at a volume ratio of 1:1, wherein the component A is prepared by proportionally mixing liquid sodium silicate, small-molecular alcohol and a catalyst; and the component B is prepared by proportionally mixing polyphenyl polymethylene polyisocyanate and a viscosity reducer. The chemical grouting material provided by the invention has the characteristics of low raw material cost, good permeability, fast curing, high adhesive force with a coal bed and high solidification strength; and particularly, the material does not foam in water, the water shutoff and reinforcement effects can be perfectly realized, the related raw materials are green and pollution-free, and the material does not contain volatile solvents or generate any poisonous gas and completely meets the requirements in use and environmental protection of coal mine water shutoff and reinforcement materials.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a chemical grouting material for water blocking and strengthening of coal and rock mass and a preparation method thereof. Background technique [0002] my country is a large coal-producing country. Affected by geological conditions, with the rapid expansion of coal mine mining scale and the continuous increase of mining depth, the water pressure suffered during mining is increasing. The problem of mine water discharge has become a prominent problem that plagues coal mine safety production. . [0003] Commonly used coal and rock mass water blocking reinforcement materials include inert materials (such as sand, sawdust, slag, etc.), cement slurry, water glass slurry and chemical grouting materials. Although materials such as sand, cement slurry, and water glass slurry are cheap, their water blocking effect is poor, and they do not have the effect of strengthening coal ...

AI Technical Summary

Problems solved by technology

Although materials such as sand, cement slurry, and water glass slurry are cheap, their water blocking effect is poor, and they do not have the effect of strengthening coal and rock mass, so they cannot completely block water

Chemical grouting materials are mainly polyurethane materials and urea-formaldehyde resins. Polyurethane materials have a fast curing speed and good water blocking effect. big investment

Urea-formaldehyde resin has a fast curing speed and can be used to block water, but its strength is not high and it cannot play a good role in reinforcement

Images