Novel hydrogel coal field fire preventing and extinguishing material and using method thereof

Abstract

The invention discloses a novel hydrogel coal field fire preventing and extinguishing material, which is prepared by mixing a fire preventing and extinguishing dry material and water according to a material-water mass ratio of 2-3:100; wherein the fire preventing and extinguishing dry material is prepared from the following components in percentage by mass: 80 to 85 percent of composite environment-friendly hydrogel material, 5 to 10 percent of composite anti-enzyme preservative and 10 to 15 percent of composite halogen salt; the composite environment-friendly hydrogel material is prepared from the following components in percentage by mass: 40 to 60 percent of instant polyanionic cellulose, 0.5 to 1.5 percent of high-viscosity polyacrylamide and 38.5 to 58.5 percent of super absorbent resin; the compound type anti-enzyme preservative is prepared from the following components in percentage by mass: 30 to 40 percent of calcium propionate, 15 to 30 percent of potassium sorbate, 15 to 20percent of calcium benzoate and 15 to 30 percent of dehydroacetic acid. The novel hydrogel coal field fire prevention and extinguishing material provided by the invention has good water retention performance, which forms a waterproof film with a certain thickness on the surface of a coal body, so that the product can quickly reduce the temperature of a coal field fire area, and effectively prevents air flow, so that spontaneous combustion of coal is inhibited.

Description

technical field [0001] The invention relates to the field of surface coalfield fire prevention and extinguishing, in particular to a novel hydrogel coalfield fire prevention and extinguishing material and its application method. Background technique [0002] my country is the country with the most severe coalfield fires in the world. The amount of coal directly burned due to spontaneous combustion of coalfields reaches more than 20 million tons every year, among which Xinjiang and Shanxi are the most serious, which not only causes huge economic losses, but also seriously affects the ecological environment. harm. According to the "Coalfield Fire Extinguishment Code" (2010), the common technical processes for coalfield fire prevention and extinguishment include stripping, water injection, drilling, grouting, covering, etc. Among them, grouting and covering, as the main technology for preventing and controlling coalfield fire, are of great significance for preventing and contro...

AI Technical Summary

Problems solved by technology

In addition, the patents with the publication numbers CN111214799A and CN111019047A respectively proposed the preparation method of water-based gel fire-resistant materials for mines, and achieved oxygen barrier, cooling and flame-retardant effects on pyreous coal by utilizing the water content and bonding characteristics of the materials themselves. , but due to the complex production process, high cost, poor water retention and repeated water absorption, and high initial grouting resistance, it is difficult to achieve a good control effect on the re-ignition of coalfield fires