High-strength composite grouting reinforcement material with island structure and preparation method thereof

Abstract

The invention relates to a high-strength composite grouting reinforcement material with an island structure and a preparation method thereof, which belong to the field of engineering grouting reinforcement. The material comprises components A (silicate aqueous solution, polyisocyanate, polyol, a reaction stabilizer and a coalescing agent) with the viscosity of less than 300 mpa.s and components B(a reaction promoter, a reinforcing agent and a cooling agent) with the viscosity of less than 200 mpa.s, and through content adjustment of proper components, the material has an island structure. Thecompressive strength of the material can reach 65 Mpa or above, self-extinguishing can be achieved within 1 s after fire is removed, safety is high, stability is good, viscosity is low, infiltrationcapacity is high, the diffusion radius is large, the material is applied to the fields of coal mine roof and floor reinforcement, roadway reinforcement, slope reinforcement, soft soil foundation reinforcement and the like, the mechanical structure of a working face can be effectively improved, and the bearing capacity of the working face is improved; meanwhile, the preparation method is simple andeasy to operate, and the preparation cost of the reinforcing material can be further reduced.

Description

technical field [0001] The invention belongs to the field of engineering grouting reinforcement, and in particular relates to a high-strength composite grouting reinforcement material with a sea-island structure and a preparation method thereof. Background technique [0002] The mining environment of my country's coal mines is very harsh. In the process of coal mining, loose and broken coal seam roofs, faults, and broken zones often occur, resulting in roof caving, water seepage, gas and other disasters on the working surface, which seriously threaten the life safety of underground workers. The composite grouting reinforcement material can effectively reinforce the broken coal and rock mass, improve the mechanical structure of the coal and rock mass, and effectively prevent accidents such as slabs and roof caving in the coal mining face. Composite grouting reinforcement materials mainly include epoxy modified polyurethane composite grouting materials, graphite modified grout...

AI Technical Summary

Problems solved by technology

Epoxy-modified polyurethane composite grouting material has the advantages of compact consolidated body and no foaming when exposed to water, but the material has the disadvantages of high initial viscosity, poor fluidity and low compressive strength of the material; graphite modified grouting reinforcement material It has the advantages of low heat storage temperature and superior antistatic ability, but has the disadvantages of high viscosity of graphite system and poor uniformity of the system due to graphite easy to settle; ultrafine Portland cement-based grouting material has good pressure bearing capacity and can It takes 28 days to reach the maximum strength, and the strength growth is slow; acidified carbon nanotubes and graphene oxide modified organic / inorganic nanocomposite grouting materials have high compressive strength, but acidified carbon nanotubes with high cost are required in the preparation process , graphene oxide, POSS grafted graphene and other raw materials, resulting in higher cost of composite grouting materials

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