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Method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs

A goaf and sol technology, applied in fire prevention, dust prevention, mining equipment, etc., to achieve the effect of preventing spontaneous combustion fires and inhibiting the oxidation of residual coal

Active Publication Date: 2016-01-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, there is no report on the use of phase change materials to prevent spontaneous combustion fires in goafs

Method used

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  • Method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs
  • Method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the air inlet lane of the fully mechanized mining face of the coal mine, the phase change sol fire extinguishing system described in the present invention (such as figure 1 As shown), the material storage tank 2, inlet valve 3, ultrasonic atomization generating device 4, outlet valve 5 and nozzle 6 are connected in series on the gaseous sol branch pipe from the beginning to the end in sequence, and the pressure system 1 adopts downhole compressed air. Add acrylic monomer and acetal silicone to the material storage tank 2 respectively, the mass ratio is 50:3 (or 80:1, or 12:1), lay the nozzle 6 along the air inlet lane, and advance with the working face It is completely buried in the goaf, and then the acetal silicone and acrylic monomers are sprayed out in sequence, and the sol colloid particles flow through the gob along with the air leakage in the goaf. Initiated by the acetal silicone, it reacts with each other on the surface of the remaining coal to form a homopo...

Embodiment 2

[0020] In the air inlet lane of the fully mechanized mining face of the coal mine, the components of the phase change sol fire extinguishing system of the present invention are connected, and the pressure system adopts underground water pressure. Add methacrylic acid monomer, maleic acid monomer, silicene ether (or hydroxyethyl acrylate) and ethoxyquinoline to the material storage tank 2 respectively, the mass ratio of which is 30:30:5:1, Lay the nozzle 6 along the channel of the air inlet lane, and completely bury it in the goaf as the working face advances, and then spray out silicene ether, methacrylic acid monomer, maleic acid monomer and ethoxyquinoline in sequence , the sol colloidal particles flow through the goaf along with the air leakage in the goaf. Initiated by silene ether (or hydroxyethyl acrylate), they react with each other on the surface of the remaining coal to form homopolymer and copolymer colloids, which can inhibit the spontaneous combustion of coal oxida...

Embodiment 3

[0022] In the air inlet lane of the fully mechanized mining face of the coal mine, the components of the phase change sol fire extinguishing system of the present invention are connected, and the pressure system adopts underground compressed air. Sodium acrylate monomer, acryl alcohol monomer, methacryl alcohol monomer, silane coupling agent (or aluminum isopropoxide) and styrenated phenol are respectively added into the material storage tank 2, and the mass ratio is 20:20:30 :1:2, lay the nozzle 6 in the air inlet lane along the channel, and completely bury it in the goaf as the working face advances, and then spray out the silane coupling agent, sodium acrylate monomer, acrylic alcohol monomer, and methacrylic acid in sequence. Alcohol monomers, styrenated phenols, and colloidal sol particles flow through the goaf along with the air leakage in the goaf. Initiated by the silane coupling agent (or aluminum isopropoxide), they react with each other on the surface of the remaini...

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Abstract

The invention relates to coalmine goaf prevention and control in the field of mining safety, in particular to a method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs. The method includes: injecting various gaseous sols into a goaf from an underground coalmine, allowing colloidal particles of the sols to deposit on the surface of residual coal so as to react with one another to form a mesh structure by polycondensation, and finally forming a liquid colloid or solid film excellent in stability after phase change, wherein the colloidal particles of the sols include an initiating agent and at least one crosslinking monomer, and the initiating agent is capable of promoting formation of homopolymers or / and copolymers formed by the at least one crosslinking monomer. The method of using the phase-changeable sols for preventing the spontaneous combustion type fire disasters in the coalmine goafs has the advantages that air can be isolated to inhibit oxidation of the residual coal, so that the spontaneous combustion type fire disasters can be prevented; in addition, a phase-changeable sol fire extinguishing system aiming at the method is available for industrialized, standardized and universalized manufacture and is widely applicable to the field of prevention and control of the spontaneous combustion type fire disasters in the coalmine goafs.

Description

technical field [0001] The invention relates to the prevention and control of goafs in coal mines in the field of mining safety, in particular to a method for preventing spontaneous combustion fires in goafs of coal mines by using phase change sol. Background technique [0002] Spontaneous combustion of coal is common in underground mines, which can easily cause casualties and property losses. When a spontaneous combustion fire occurs in the goaf of a coal mine, the injection of N 2 or CO 2 Inert gas such as fire extinguishing needs to be continuously replenished. Excessive injection can easily cause suffocation accidents, and the effect is poor in goafs with serious air leakage. Injected liquid materials such as mud and gel generally migrate along the direction of gravity and are difficult to accumulate in goafs, so they are not suitable for goafs under complex conditions such as large inclination angles. Therefore, it is urgent to develop a technology that can efficient...

Claims

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Application Information

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IPC IPC(8): E21F5/00
CPCE21F5/00
Inventor 唐一博薛生
Owner TAIYUAN UNIV OF TECH
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