Modified phenolic resin grouting material for seepage and water blocking in underground coal mines and its preparation method

Abstract

The invention discloses a permeable water plugging modified phenolic resin injecting paste material for an underground coal mine and a preparation method and aims to solve the problem that a water plugging 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, oxalic acid and urea, 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 1:1. The material disclosed by the invention is low in viscosity and high in liquidity and is capable of completely plugging ultra-thin cracks, is high in curing time which is adjustable on site within a range of 5-60 seconds; a polymer cannot be pulverized, is stable when meeting water and is capable of permanently plugging the cracks. The material reaches a fire-retardant level and is environmentally friendly; production raw materials are completely domesticated and are pollution-free; the construction is simple; the operation is simple and easy to implement; the environment cannot be polluted during a production process, and the health of workers is not influenced.

Description

technical field [0001] The invention relates to a seepage and water blocking material for underground coal mines, in particular to a modified phenolic resin grouting material. Background technique [0002] In the process of coal mining, due to geological changes, the coal rock formations are fractured and broken, and rich formation water flows into the roadway through the broken cracks, which not only brings inconvenience to safe production, but also increases with the long-term erosion of the water flow. Large, it may also cause roof fall, collapse, etc., which will affect the lives of miners. [0003] Coal mines mainly adopt the methods of guiding, pumping and injecting chemical slurry to control the underground water. Guidance and drainage cannot fundamentally solve the water leakage situation, and the existing grouting method is mainly to use polyurethane to drill holes in the leakage area and use the characteristics of rapid solidification of polyurethane to seal the c...

AI Technical Summary

Problems solved by technology

Guidance and drainage cannot fundamentally solve the water leakage situation, and the existing grouting method is mainly to use polyurethane to drill holes in the leakage area and use the characteristics of rapid solidification of polyurethane to seal the coal and rock cracks to achieve water effect

[0004] However, during the polymerization process of polyurethane materials, the reaction to water is too strong, mainly manifested in the rapid foaming and hollowing when encountering water, which cannot withstand long-term water pressure, and the water blocking effect is not ideal, especially in China at 10m per hour. 3 In the case of low water flow, most of the methods of guiding and pumping are used to ensure safe production in the well