Polyurethane polymer material for coal rock mass reinforcement and preparation method thereof

Abstract

The invention belongs to the field of chemical synthesis, and particularly relates to a polyurethane high polymer material for coal rock mass reinforcement and a preparation method of the polyurethane polymer material. The polyurethane polymer material consists of component A and component B, wherein the component A is composed of a polyalcohol, a solvent, a catalyst and a fire retardant and the component B is composed of polyaryl polymethylene polyisocyanate. The polyurethane polymer material and the preparation method, disclosed by the invention, have the advantages that: through formulation design, foaming is carried out at a normal temperature, the curing rate is adjustable, the strength of consolidation body is high, compressive strength is more than 55MPa, the coal rock support force can be obviously increased; the consolidation body has very good toughness and can bear subsequent mining influence; the raw liquid is low in viscosity and has good permeability in the coal rock mass; and the caking property of the consolidation body and the coal rock mass is good; the related raw materials in the invention are green, pollution-free and harmless to human body, contain no volatile solvent and generate no any toxic gas, therefore, the use and environmental requirements for the coal rock mass reinforcement are completely satisfied; and the material is pressed and filled by using a double liquid grouting pump, therefore, the pumpability is good and the use is convenient.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a polyurethane polymer material for strengthening coal and rock mass and a preparation method thereof. Background technique [0002] During the production process of coal mines, roadways and mine working faces are often affected by faults and mining pressures, which cause safety hazards such as soft and broken roofs, roof caving, slabs, and subsidence. In addition to normal mechanical support, injection polymer reinforcement materials are safe and effective in solving coal mine collapse and caving, preventing roadway deformation hazards caused by the development of cracks in surrounding rocks, and improving the self-supporting capacity of surrounding rocks during excavation or repair. Quick and efficient action. [0003] Commonly used coal and rock mass strengthening agents mainly include polyurethanes, epoxy resins, urea-formaldehyde resins, etc. Among them, the e...

AI Technical Summary

Problems solved by technology

Among them, the epoxy resin curing agent has good adhesion, small curing shrinkage, no gas during curing, excellent heat resistance and durability, but the slurry is stiff and not flexible enough; the raw material liquid of the urea-formaldehyde resin curing agent is water-based The material has low viscosity, good pumpability, good flame retardancy, but the compressive strength is slightly poor, and the material contains free formaldehyde, which will cause great harm to the operators.