Mining filling-closing material and preparation device thereof

Abstract

The invention relates to mining materials and aims at providing a mining filling-closing material. According to the technical scheme, the material contains the following components in parts by weight: 100 parts of water, 50 parts of coal ash, 2 parts of gypsum, 12 parts of 42.5R cement, 8 parts of slaked lime, 1.6 parts of fatty alcohol-polyoxyethylene ether, 7 parts of hydroxyethyl methylcellulose, 2.4 parts of lauryl sodium sulfate, 1.4 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 1.8 parts of polyphosphoric acid, 2.2 parts of hydroxypropyl starch ether with a viscosity of 300mPas-600mPas, 1.5 parts of vinyl acetate-vinyl copolymer type redispersible powder, 8 parts of glass fibers shorter than 2mm and a sufficient amount of a silane coupling agent capable of infiltrating the glass fibers. The material has excellent flame retardance and is simple in process and low in cost; the material is mainly prepared from inorganic materials, so that the material is not decomposed and is toxic-free and harmless, and safety hazards are not caused due to heavy use of the material.

Description

technical field

[0001] The invention relates to a mine filling and sealing material and a preparation device. Background technique

[0002] During coal mine excavation and mining operations, it is inevitable that caving, slabs, and holes will occur. These holes often cause gas accumulation, which not only increases the risk of gas explosion, but also causes spontaneous combustion in coal seams with spontaneous combustion tendency. Therefore, only by filling these holes in time can safe production be ensured. Coal mines in my country usually use methods such as erecting wooden stacks and filling mortar at the site of the fall, but these methods are time-consuming, laborious, and difficult to construct, and cannot guarantee that the hidden dangers of accidents will be truly eliminated. In addition, the goaf is not isolated, which affects underground ventilation. The traditional domestic explosion-proof airtight walls are mostly brick wall structures, and bricks, sand, ceme...

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