Modified phenolic resin injecting paste material for coal and rock mass reinforcing and preparation method

Abstract

The invention discloses a modified phenolic resin injecting paste material for coal and rock mass reinforcing and a preparation method and aims to solve the problem that a reinforcing effect is not ideal by adopting a traditional material. The preparation method is characterized by comprising the following steps of preparing a component A from phenol, formaldehyde, barium hydroxide, urea and oxalic acid, preparing a component B from phenolsulfonic acid, phosphoric acid and para-toluenesulfonic acid, and then, mixing the component A and the component B in weight ratio of (1-4):1. The material disclosed by the invention is low in viscosity and extremely excellenent in liquidity, can permeate into very thin cracks, and is adjustable on site in curing time. The heat value of the material disclosed by the invention is lower than similar materials in markets for at least 250 DEG C, and is good in fire resistance. The raw materials are completely domesticated, and are autonomous in property right, and any technical barriers do not exist. The material disclosed by the invention is strong in operability, small in viscosity and strong in permeability and is simple to operate.

Description

technical field [0001] The invention relates to a chemical material, in particular to a modified phenolic resin grouting material for coal and rock mass reinforcement. Background technique [0002] In the process of coal mine production, due to geological changes, coal rock formations are fractured and broken, and landslides and subsidences caused by pressure during the mining process have greatly affected the production efficiency of enterprises and the life safety of miners. [0003] In the last century, the reinforcement materials used in underground coal mines mainly used cement slurry injection as the advanced reinforcement and support of coal and rock mass, but the cement slurry reinforcement and solidification time is too long, and it takes about a week to fully solidify, which greatly reduces production efficiency and has been cancelled. . [0004] At the beginning of this century, my country introduced polyurethane materials from abroad for advanced reinforcement a...

AI Technical Summary

Problems solved by technology

For example, the underground temperature in Taiyuan area is 6-15 0 C, while the underground temperature in the Huaihe River Basin is at 25 0 C-30 0 C; Each mine has different temperature due to different depths. The same material, because of different temperatures, has different curing time, which affects its own permeability. Poor permeability will affect the effect of reinforcement. In addition, polyurethane The viscosity of A and B two-component materials is generally 300mpa. s / 25 0 Above C, the fluidity itself is not very good, and the flexibility of the polyurethane polymer is also a major feature of it. Under high pressure, the deformation can reach more than 40%, and the problems of chipping, roof caving, and collapse are all caused by its own space. Yes, because there is no space, the object cannot move. It is precisely because of this characteristic that the effect of reinforcement is affected. During the construction process, the roof of the state sometimes occurs.