Fire retardant coating for underground coal seam of coal mine

Abstract

The invention provides fire retardant coating for an underground coal seam of a coal mine, comprising the following compositions in parts by weight: 74 to 140 parts of powder materials, and 15 to 56 parts of polymer emulsion. The powder materials comprise the following compositions in parts by weight: 30 to 50 parts of high quality cement, 7 to 10 parts of expanded perlite, 5 to 10 parts of expanded vermiculite, 10 to 25 parts of quartz sands, 10 to 15 parts of graphite powder, 0 to 10 parts of coal ash, 10 to 15 parts of aluminum hydroxide, and 2 to 5 parts of magnesium hydroxide. The method for preparing the fire retardant coating comprises the following steps: uniformly mixing the power materials in proportion, and packaging the materials independently; mixing the polymer emulsion with water, and adding the powder material in the mixture in a proportion of the polymer emulsion, the water and the powder materials to be 0.2-0.4:0.15-0.55:1; and uniformly mixing the mixture by a mortar mixer. The coating has the advantages of fire proofing, static resistance, good caking property with coal, good water resistance, good elasticity, non toxicity, easy construction, low cost and the like.

Description

technical field [0001] The invention relates to a fireproof coating, in particular to a coal seam fireproof coating under a coal mine. Background technique [0002] Coal mine fire is one of the five major disasters in mines. In coal mines, coal itself is a large and ubiquitous combustible substance; secondly, a large amount of coal dust, gas, and pit wood, electromechanical equipment, explosives, oil and other substances produced during the production process are all Flammability exists, and their presence is an essential element for a fire to occur. Once a fire breaks out in a mine, the fire develops quickly, the control is more complicated, and the scope of influence is relatively wide, which can easily cause casualties and property losses, and even cause coal dust and gas explosions, leading to even greater disasters. In order to improve the ability of coal mines to resist fire, it is one of the effective methods to spray a layer of fireproof coating on the coal body in...

AI Technical Summary

Problems solved by technology

Although this kind of fireproof coating has a good application effect in traffic tunnels, due to the dampness of the underground coal wall in the coal mine, water leakage is common, the coal wall is rough and uneven, the coal wall will deform slowly, and contains a large amount of gas, so it is required to have antistatic properties. etc., which makes the tunnel fireproof coating less suitable for underground coal mines, and has disadvantages such as poor antistatic performance, poor adhesion, no elasticity, easy cracking and falling off when the coal wall is deformed, and poor water resistance.