Gas plugging coating for wall surface of mine laneway

A roadway and wall surface technology, which is applied in the direction of fireproof coatings, conductive coatings, coatings, etc., can solve the problems of poor coating dispersion, high price, and numerous processes, and achieve the effects of reduced emissions, low cost, and large measurement environment

Active Publication Date: 2015-05-27
SHANXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the decarbonization of fly ash by flotation requires the addition of expensive emulsifiers, collectors and foaming agents. The flotation yield is 30-35%, and the decarbonized fly ash obtained by flotation needs to be baked It can be used only when it is dry, and there are many procedures; in addition, the surface of the decarbonized fly ash after flotation has collectors and foaming agents and other surfactants, so that the fly ash particles are easy to agglomerate and settle in the coating, and the dispersion of the coating is changed. Difference

Method used

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  • Gas plugging coating for wall surface of mine laneway
  • Gas plugging coating for wall surface of mine laneway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 60kg of ultra-fine fly ash with a particle size of 2.18μm, 20kg of slag Portland cement with a label of 325, 10kg of chlorinated paraffin, 5kg of aluminum hydroxide, 3kg of graphite, and 2kg of carbon black to form a powder; Take 50kg of flexible emulsion S400F and pour it into the mixing tank of the grouting pump, then add 30kg of water, stir evenly at a low speed, then add the above powder, continue stirring evenly, and then spray the mine roadway wall.

[0022] Test results:

[0023] 1) Appearance performance

[0024] The surface drying time of the coating is 10 minutes, and the hard drying time is 7 hours. After hard drying, the coating is smooth and without cracks;

[0025] 2) Mechanical properties

[0026] Untreated tensile strength 3.1MPa, elongation at break 83%, 0.3MPa 30min impermeable, in line with the standards specified in GB / T23445-2009 "Polymer Cement Waterproof Coatings";

[0027] 3) coal safety test

[0028] Flame resistance test: Alcohol lamp b...

Embodiment 2

[0035] Mix 70kg of ultra-fine fly ash with a particle size of 3.76μm, 10kg of slag Portland cement with a label of 325, 12kg of chlorinated paraffin, 3kg of aluminum hydroxide, and 5kg of graphite to form a powder; take the flexible emulsion at the construction site Pour 50kg of S400F into the mixing tank of the grouting pump, then add 32kg of water, stir evenly at a low speed, then add the above powder, continue stirring evenly, and then spray the wall of the mine roadway.

[0036] Test results:

[0037] 1) Appearance performance

[0038] The surface drying time of the coating is 12 minutes, and the hard drying time is 7 hours. After hard drying, the coating has no cracks;

[0039] 2) Mechanical properties

[0040] Untreated tensile strength 3.5MPa, elongation at break 80%, 0.3MPa 30min impermeable, in line with the standards specified in GB / T23445-2009 "Polymer Cement Waterproof Coatings";

[0041] 3) coal safety test

[0042] Flame resistance test: Alcohol lamp burns wi...

Embodiment 3

[0048] Mix 75kg of ultra-fine fly ash with a particle size of 2.18μm, 5kg of slag Portland cement with a label of 325, 7kg of chlorinated paraffin, 8kg of aluminum hydroxide, 3kg of graphite, and 2kg of carbon black to form a powder; Take 50kg of flexible emulsion S400F and pour it into the mixing tank of the grouting pump, then add 38kg of water, stir evenly at a low speed, then add the above powder, continue stirring evenly, and then spray the wall of the mine roadway.

[0049] Test results:

[0050] 1) Appearance performance

[0051] The surface drying time of the coating is 13 minutes, and the hard drying time is 7.5 hours. After hard drying, the coating has no cracks;

[0052] 2) Mechanical properties

[0053] Nowhere is the tensile strength 3.4MPa, elongation at break 70%, 0.3MPa 30min impermeable, in line with the standards specified in GB / T23445-2009 "Polymer Cement Waterproof Coatings";

[0054] 3) coal safety test

[0055] Flame resistance test: Alcohol lamp burn...

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Abstract

The invention relates to the technical field of coal mine safety, and particularly relates to a gas plugging coating for the wall surface of a mine laneway. The gas plugging coating is capable of reducing the concentration of gas inside the mine laneway, enabling the gas to uniformly effuse and reducing the cost. The gas plugging coating for the wall surface of the mine laneway comprises a liquid material and a powder material according to the mass percent of (40-55):100, wherein the liquid material is an elastic polymerized emulsion, the elastic polymerized emulsion is an anionic acrylate emulsion or a styrene-acrylate emulsion; the powder material comprises the following components in percentage by weight: 50%-80% of micropowder coal ash, 0%-30% of cement, 3%-5% of graphite, 0%-2% of carbon black, 7%-12% of chlorinated paraffin and 3%-8% of aluminum hydroxide; and the particle diameter of the micropowder coal ash is 1-10 micrometers, and the cement is 325# portland slag cement or higher-grade cement. The gas plugging coating disclosed by the invention is mainly applied to the aspect of coal mines.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a gas sealing coating for the wall surface of a mine roadway. Background technique [0002] my country is a large coal-producing country, and gas is a high-quality clean energy that is associated with coal, and it is also a major safety hazard in the underground mining and driving face of coal mines. In order to ensure the gas gushing out of the mine roadway and the safety of the operation surface during the underground mining and excavation of coal mines, the current coal mining enterprises have basically equipped with gas detection systems and ventilation systems. The data detected by the detection device is not accurate enough. In order to ensure safe production, the ventilation system operates at full capacity almost around the clock. According to statistics, the power consumption of fans accounts for 15% to 20% of the total power consumption of the whole mine, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D133/08C09D5/24C09D5/18C09D7/12
CPCC08K2201/014C08L2201/14C09D5/18C09D5/24C09D7/61C09D125/14C09D133/04C08L91/06C08K3/00C08K3/04C08K2003/2227
Inventor 薛芳斌杨凤玲宋慧平程芳琴
Owner SHANXI UNIV
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