Elastic cured foam material for underground goaf and application thereof

A technology for curing foam and goaf, which is applied in the field of elastic curing foam material in underground goaf, can solve the problems of poor compression resistance of closed walls, rupture of closed walls, and poor compression resistance of underground goafs, etc.

Inactive Publication Date: 2018-04-20
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 Comm

Method used

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  • Elastic cured foam material for underground goaf and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] An elastic solidified foam material for downhole goaf, prepared from raw materials including the following parts by weight: 30 parts of polyphenyl polymethylene polyisocyanate, 2 parts of polyester polyol, 1 part of hydrofluoroalkane, ethylene glycol 2 parts, 1 part of diethylene glycol, 10 parts of tris(2-chloropropyl) phosphate, 1 part of polydimethylsiloxane-alkylene oxide copolymer, 4,4,-bis(α,α -Dimethylbenzyl)diphenylamine 3 parts, CaCO 3 6 parts, 0.1 part of dibutyltin dilaurate, 5 parts of sulfonated polybutadiene. The above-mentioned raw materials are mixed to obtain an elastic solidified foam material in the downhole goaf. After testing, the foaming time of the elastic solidified foam material in the underground goaf area prepared in Example 1 is 1 min, the curing time is 10 min, and the aging time is increased by 50 years.

[0044] The filling template construction method is used to prepare the sealing wall of the underground goaf. Two filling templates are set...

Embodiment 2

[0046] An elastic solidified foam material for underground mined-out areas, prepared from raw materials including the following parts by weight: 50 parts by weight of toluene diisocyanate, 10 parts by polyester polyol, 5 parts by n-pentane, and 6 parts by 1,4-butanediol , 6 parts of diethylene glycol, 4 parts of polydimethylsiloxane-alkylene oxide copolymer, 2 parts of stannous octoate. The above-mentioned raw materials are mixed to obtain an elastic solidified foam material in the downhole goaf. After testing, the foaming time of the elastic solidified foam material in the underground goaf area prepared in Example 1 is 1 min, and the curing time is 10 min.

[0047] The filling template construction method is used to prepare the sealing wall of the underground goaf. Two filling templates are set at the predetermined closed wall position in the underground goaf. The distance between the two filling templates is 1m, and the height of the template and the tunnel in the underground g...

Embodiment 3

[0049] An elastic solidified foam material for underground mined-out areas, prepared from raw materials including the following parts by weight: 35 parts of xylylmethane diisocyanate, 5 parts of polyether polyol, and liquid CO 2 2 parts, 3,5-dimethylthiotoluenediamine 3 parts, trimethylolpropane 3 parts, trichloroethyl phosphate (TCEP) 3 parts, polydimethylsiloxane-alkylene oxide copolymer 2 Parts, 1 part of 4,4,-bis(α,α-dimethylbenzyl)diphenylamine, nano SiO 2 5 parts, 0.5 parts of triethylenediamine, 1 part of glutaraldehyde. The above-mentioned raw materials are mixed to obtain an elastic solidified foam material in the downhole goaf. After testing, the foaming time of the elastic solidified foam material in the underground goaf area prepared in Example 1 is 2 min, and the curing time is 10 min.

[0050] The filling template construction method is used to prepare the sealing wall of the underground goaf. Two filling templates are set at the predetermined closed wall position i...

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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, ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/32C08G18/38C08G18/42C08G18/48C08J9/12C08J9/14C08K3/26C08K3/36C08G101/00
CPCC08G18/664C08G18/3206C08G18/3868C08G18/42C08G18/48C08G18/6677C08G18/6685C08G2101/00C08J9/122C08J9/141C08J9/146C08J2203/06C08J2203/14C08J2203/142C08J2375/06C08J2375/08C08K3/26C08K3/36C08K2003/265C08K2201/011
Inventor 朱红青陆新晓李峰胡超史玮
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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