Silicon-based polymer filling material for coal mines, and preparation method thereof

Abstract

The invention discloses a silicon-based polymer filling material for coal mines, and relates to the technical field of filling materials for the coal mines. The silicon-based polymer filling materialis prepared from a component A and a component B through mixing, wherein the mass ratio of the component A to the component B is (1.2-1.6):1, the component A is prepared from water glass, a compositecatalyst, a foam stabilizer and a surfactant through mixing, and the component B is prepared from isocyanate, a flame retardant and a plasticizer through mixing. The invention also discloses a preparation method of the silicon-based polymer filling material for the coal mines. The silicon-based polymer filling material has the advantages of environment protection, adjustability in expansion times,low heat storage and self-extinguishing, solving the problems of poor environmental protection property, low tight-filling rate, high heat release and no flame retardance of current filling materialsfor the coal mines.

Description

technical field [0001] The invention relates to the technical field of filling materials for coal mines, in particular to a silicon-based polymer filling material for coal mines and a preparation method thereof. Background technique [0002] Coal spontaneous combustion is a major hidden danger hindering the safe mining of coal mines. One of the important causes of coal spontaneous combustion is air leakage in gobs or roadways. Therefore, the use of suitable filling and plugging materials is one of the main means to block air leakage and prevent spontaneous combustion of coal seams, which has huge economic and important social benefits for ensuring coal safety production. [0003] At present, my country still mainly uses cheap inorganic materials (loess, masonry, cement, fly ash, etc.) in mine filling and plugging. Under the action of deep, high ground stress, large deformation roadway and mining, the rigid wall is often deformed by fracturing, and broken to form a certain a...

AI Technical Summary

Problems solved by technology

[0003] At present, my country still mainly uses cheap inorganic materials (loess, masonry, cement, fly ash, etc.) in mine filling and plugging. Under the action of deep, high ground stress, large deformation roadway and mining, the rigid wall is often deformed by fracturing, and broken to form a certain air leakage channel, which is difficult to meet the long-term plugging of air leakage.

However, organic solidified foams generally have disadvantages such as high foaming temperature, high cost, flammability, and toxic fumes released by combustion, which limit their use in coal mines.