Mining high-antistatic composite spraying wind plugging material and preparation method thereof

Abstract

The invention belongs to the technical field of mining plugging and sealing materials, and particularly relates to a mining high-antistatic composite spraying wind plugging material and a preparation method thereof. The mateiral comprises a component A and a component B, wherein the component A is prepared from water glass, deionized water, a CUCAT-WN catalyst, glycerol, alkanolamide and ethoxylated alkyl polyamine; and the component B is prepared from polymethylene polyphenyl polyisocyanate, a polyurethane prepolymer, glycerol triacetate, a 141b foaming agent, a foam stabilizer L-6900, super absorbent resin, polyacrylamide and sodium alginate. The component A and the component B are respectively prepared, the component A and the component B are sprayed onto a coal and rock mass or a wall body to be sealed by a spraying machine at normal temperature, and repeated spraying is conducted for a plurality of times to a corresponding thickness, thereby obtaining the mining high-antistatic composite spraying wind plugging material. The material is mainly used in underground coal mines and has excellent and long-acting antistatic performance and excellent airtight use performance, and underground safety accidents caused by discharge due to accumulation of local electrostatic charges in the underground coal mines are prevented.

Description

technical field [0001] The invention belongs to the technical field of plugging and sealing materials for mines, and in particular relates to a highly antistatic composite spraying wind leakage plugging material for mines and a preparation method thereof. Background technique [0002] Coal mine production has its particularity. Since the production space is mainly in underground tunnels, the special working environment determines that the consequences of accidents in coal mine production are often very serious. Mine air leakage is not only a major hidden danger in mine ventilation work, but also an important cause of spontaneous combustion of residual coal in goafs. In order to solve the problem of mine air leakage, researchers have developed a large number of materials used in coal mine underground air leakage plugging to reduce air leakage to gobs, prevent gas gushing and spontaneous combustion of coal seams; sealing plugging materials can also be used to increase mine se...

AI Technical Summary

Problems solved by technology

[0003] At this stage, the air leakage plugging material for underground coal mines has not been fully researched and designed for the antistatic properties of the material itself. The invention patent with the application number 202010124941.1 "A Mine Spraying Air Leakage Plugging Material and Its Preparation Method" discloses A phenolic urea-formaldehyde resin plugging material, which has the advantages of high compressive strength and good bending performance, but does not involve the antistatic performance of the material, and the material itself is a polymer with a relatively high resistivity material, which is very easy to accumulate electrostatic charges; the invention patent of application number 201711367226.5 "A Composite Spraying Material, Framework and Implementation Method for Downhole Rapid Plugging and Filling" discloses a composite resin foam plugging formed by phenolic, polyurethane and urea-formaldehyde The leakage filling material has the characteristics of light weight, fast forming, strong airtightness, and good fireproof plugging effect. The material has added 2% antistatic agent inside to achieve a certain antistatic effect, but it is not antistatic. Make a clear statement on the advantages and disadvantages of electrostatic effect and long-term effect

[0004] In addition, the spraying plugging and air sealing material used in underground mines can also use polyurethane foam material alone. Its sealing speed is fast, convenient and quick, and its sealing effect is good. agent and antistatic agent, the cost is higher