Elastic cured foam material for underground goaf and application thereof

Abstract

The invention provides an elastic cured foam material for an underground goaf and belongs to the technical field of fire prevention and fire extinguishment of the underground goaf. The elastic cured foam material for the underground goaf, provided by the invention, is prepared from the following raw materials in parts by weight: 30 to 50 parts of polyisocyanate, 2 to 10 parts of a polyol compound,1 to 5 parts of a foaming agent, 2 to 6 parts of a chain extender, 1 to 6 parts of a crosslinking agent, 0 to 10 parts of a flame retardant, 1 to 4 parts of a foam stabilizer, 0 to 3 parts of an anti-ageing agent, 0 to 6 parts of filler, 0.1 to 2 parts of a catalyst and 0 to 5 parts of a softening agent. The elastic cured foam material for the underground goaf, provided by the invention, has theadvantages of great stretching rate, strong compression resisting capability and good sealing performance, and also has the advantages of rapid foaming speed, short curing time and long ageing time.

Description

Technical field [0001] The invention relates to the technical field of fire prevention and extinguishing of underground goaf areas, in particular to an elastic solidified foam material for underground goaf areas and its application. Background technique [0002] The closed wall of the underground goaf is the most widely used and most effective technology in the technology of sealing the goaf. This technology cuts off the air leakage channel leading to the goaf and reduces the oxygen supply to the goaf. The purpose of preventing spontaneous combustion of coal remaining in the goaf. At present, the airtight walls of the underground goaf mainly include three types: inorganic material airtight walls, organic material airtight walls and mixed material airtight walls. [0003] Traditional inorganic material airtight walls are constructed by artificial masonry, concrete pouring, cement sand spraying, etc. This kind of enclosed wall has simple construction technology, low material cost, ...

AI Technical Summary

Problems solved by technology

This kind of airtight wall has simple construction technology, low material cost, mature technology, and rich practical experience, and is familiar to the majority of designers. The material used in this airtight wall is rigid and does not have the characteristics of plastic deformation. When impacted by dynamic pressure, it is easy to cause the rupture of the airtight wall; the organic material airtight wall uses the principle of polymer polymerization to inject polymer prepolymer into the area to be sealed, and the crosslinking reaction occurs after the raw materials are mixed to block the air leakage Commonly used organic materials mainly include Rockshine, Malisan, Agroni, Minerva, and expansive cement fillers, etc. The airtight walls made of organic materials have poor compression resistance. Once a gas explosion occurs in the mine, these airtight walls cannot It can withstand the impact pressure of several thousand Pa, or even several MPa; the mixed material airtight wall is a combination of the above two airtight methods, the bottom of the wall is made of inorganic materials such as masonry concrete, and the top part is made of organic materials. The problem of poor compressive performance in empty areas

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