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Detection method for gas emission quantity on wall surface of mine laneway

A technology for gas gushing volume and detection method, which is applied in mining equipment, mining equipment, earth-moving drilling, etc., can solve the problems of poor coating dispersion, high price, and many processes, and achieves compact structure, low cost and good quality. The effect of air tightness

Active Publication Date: 2015-07-08
SHANXI UNIV
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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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  • Detection method for gas emission quantity on wall surface of mine laneway
  • Detection method for gas emission quantity on wall surface of mine laneway
  • Detection method for gas emission quantity on wall surface of mine laneway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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 wall of the mine roadway.

[0028] Test results:

[0029] 1) Appearance performance

[0030] 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;

[0031] 2) Mechanical properties

[0032] 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";

[0033] 3) coal safety test

[0034] Flame resistance test: Alcohol...

Embodiment 2

[0042] 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.

[0043] Test results:

[0044] 1) Appearance performance

[0045] 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;

[0046] 2) Mechanical properties

[0047] 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";

[0048] 3) coal safety test

[0049] Flame resistance test: Alcohol lamp burns wi...

Embodiment 3

[0055] 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.

[0056] Test results:

[0057] 1) Appearance performance

[0058] 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;

[0059] 2) Mechanical properties

[0060] Untreated 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";

[0061] 3) coal safety test

[0062] Flame resistance test: Alcohol lamp burns wit...

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Abstract

The invention provides a detection method for gas emission quantity on the wall surface of a mine laneway, belongs to the technical field of mine safety, and aims at accurately detecting the gas emission quantity on the wall surface under complex underground mine environment. The method comprises the steps of pre-treating the coal wall, namely, spraying a sealing agent on the coal wall to block gaps in the surface layer of the coal wall, relieving and stabling the gas emission on the coal wall as well as providing conditions for accurately detecting gas concentration; detecting the gas emission quantity, namely, mounting a wall-mounted gas emission quantity detection device on the pre-treated coal wall to accurately detect the gas emission quantity on the wall surface of the coal seam on real time as well as being combined with the existing gas detector of the mine laneway to control the air quantity of an air blower. The method can achieve the purposes of reducing exhaust cost and safely producing; the method is mainly applied to mine coal.

Description

technical field [0001] The invention discloses a method for detecting gas gushing out from the wall surface of a mine roadway, which belongs to the technical field of coal mine safety. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00
CPCE21F17/00E21F17/18
Inventor 宋慧平薛芳斌李浩宇程芳琴
Owner SHANXI UNIV
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