Chemical grouting filling seal material for coal mine, and preparation method and application method thereof

Abstract

The invention discloses a chemical grouting filling seal material for coal mine, which comprises a component A and a component B, wherein the component A comprises a main agent phenol formaldehyde resin and an assistant, and the assistant comprises one and / or mixture of a foaming agent, a foam stabilizer, a flame retardant, a special-type assistant and the like; the component B is a curing agent; and the component A and the component B are proportionally mixed to form the foam material. The chemical grouting filling seal material for coal mine can foam at room temperature, does not generate environment-polluting gas, has the advantages of high foaming ratio, high safety, no pollution, favorable flame retardancy, favorable antistatic property, simple production technique and easily controlled product quality, and is especially suitable for filling a coal mine.

Description

technical field [0001] The invention relates to a chemical grouting material, in particular to a chemical grouting filling material for coal mines, belonging to the field of chemical materials. Background technique [0002] my country has large coal reserves, complex geological conditions, complex coal seams, serious safety problems, and generally low production efficiency. my country's coal mines are mainly underground mining, which requires the excavation of large-scale underground roadways. Due to the characteristics of low strength, fragmentation and high ground stress in my country's coal mine sedimentary strata; small coal pillars for road protection, and strong dynamic pressure influence, among them, roadway support , Reinforcement of the coal wall of the working face, reinforcement of the roadway, filling of the high-risk area of ​​the roadway, water blocking, fire prevention, sealing of the goaf and other related safety materials are key technologies that directly af...

AI Technical Summary

Problems solved by technology

The use of traditional inorganic materials as filling and sealing materials has disadvantages such as low construction efficiency, difficulty in grouting, and large amount of filling due to non-foaming. However, chemical grouting materials are used as filling and sealing materials. Currently, only polyurethane, urea-formaldehyde resin, and Phenolic resin, modified water glass, etc.

[0004] Although polyurethane filling materials have the advantages of high foaming ratio, less filling amount, and foaming when exposed to water, there are fatal defects such as high price, high application cost, and poor flame retardancy when used in coal mines.

Although the urea-formaldehyde resin filling material has low viscosity, convenient construction, high foaming ratio, and good mechanical properties, the urea-formaldehyde resin raw material monomer content is high, the volatility is large, and it pollutes the environment. will be affected

Although phenolic resin filling materials have the advantages of low viscosity, convenient construction, high foaming ratio, low monomer content, flame retardancy, and antistatic properties, most of them use halogenated hydrocarbons as foaming agents, which pollute the environment and limit their application.

Water glass is used as a filling material, and its price is low, its expansion ratio is low, and its mechanical properties are poor, which also limits its application.

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