Low-temperature safe polyurethane modified grouting material for coal and rock mass reinforcement and preparation method of low-temperature safe polyurethane modified grouting material

The invention belongs to the field of polyurethane materials, and particularly relates to a low-temperature safe polyurethane modified grouting material for coal and rock mass reinforcement and a preparation method of the low-temperature safe polyurethane modified grouting material. Comprising a component A and a component B. The component A comprises the following raw materials by weight: 15-25 parts of a filler; 70-95 parts of liquid sodium silicate; 1-5 parts of glycerol; 0.5 to 5 parts of a catalyst; wherein the filler is prepared from the following materials: n-docosyl, a silicon-based macroporous material, polycarbonate polyol, water, an anti-settling agent and concentrated sulfuric acid. The component B is prepared from the following raw materials in parts by weight: 100 parts of isocyanate prepolymer. The problems that in the curing process of existing polyurethane modified grouting materials, the reaction temperature is high, and core burning, spontaneous combustion and other potential safety hazards