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Downhole crushed coal leak-stopping fire-proofing agent for use in coal mine

A fire retardant, coal mine technology, applied in the direction of fire prevention, dust prevention, mining equipment, etc., can solve the problems of reducing the share of chemical raw materials, prolonging the protection time limit of chemical inhibitors, etc. Effect

Inactive Publication Date: 2007-05-16
董曰喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proportion of chemical raw materials in the material ratio may be further reduced, and the protection time limit of inhibitors may continue to be extended

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Construct the inlet and outlet corners of the working face to quickly block the slurry, block the leakage of harmful gas in the mined-out area, and build a firewall

[0037] Materials: silicon dioxide, commercially available, fineness 200 mesh; calcium hydroxide, prepared by digesting quicklime, fineness 50-100 mesh; magnesium chloride, commercially available, fineness 100 mesh; carrier medium, normal water.

[0038] The weight ratio of materials is: silicon dioxide: calcium hydroxide: magnesium chloride: water=0.5:6:1:80;

[0039] usage:

[0040] Weigh silicon dioxide, calcium hydroxide and magnesium chloride as required, mix the fireproofing agent itself, then add crushed coal 8 to 9 times the weight of the fireproofing agent, continue to mix well, and place it in the air inlet and return corners of the working face When constructing rapid slurry blocking, blocking harmful gas leakage in gobs, and firewalls, as the material for building walls, woven bags ar...

Embodiment 2

[0043] Example 2 Construct the air inlet and return corners of the working face to quickly block the slurry, block the leakage of harmful gas in the goaf, and build a firewall

[0044] The weight ratio of materials is: sodium silicate: calcium hydroxide: sodium chloride: water=1:8:2:90;

[0045] Adopt sodium chloride to replace magnesium chloride, all the other are with embodiment 1.

Embodiment 3

[0046] Example 3 Preparation of plugging and fireproofing agent for spraying (coating) coal body surface

[0047] The weight proportion of materials is: sodium metasilicate: calcium hydroxide: magnesium chloride: water=0.5:6:3:70.

[0048] Usage: Weigh the proportioned sodium metasilicate, calcium hydroxide and magnesium chloride as required, mix the fireproofing agent itself, add it into the proportioned water under stirring, continue stirring until it forms a gel state, and spray it evenly on the the media surface to be covered;

[0049] It is a flowable liquid before gelling, and it is gel-like after gelling. It is non-toxic and tasteless. The gelling time is 0.5-10 minutes, which can be adjusted as needed.

[0050] After spraying (coating) the surface of the coal body, the finally formed slurry gel can effectively cover the surface of the coal body, wrap the coal body to increase air tightness, isolate the contact between the coal and air, and reduce the oxygen absorption...

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PUM

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Abstract

The invention involves a leakage prevention fire-proofing agent made of broken coals under the coal mine. It features in the formation of materials in the following weight proportion: gelatinization material: calcium hydrate: magnesium chloride or natrium chloratum: carrier agent = 0.5-1:6-8:1-4: 70-90, with gelatinization material selected from silica dioxide, silicate of soda, bisilicate, aluminium sodium, or sodium aluminate and the carrier agent using water. Reducing the quantity and usage of materials, it reduces cost with cheap materials, requires little for storage and delivery, it is simple in onsite operation without added any further equipments, and convenient for promotion. With good self combustion effect of the coal, it will not desiccate, and leak-in within two months. It can satisfy the fire prevention requirements in building stopping plasm, firewall of blocking the leakage of poisonous gas, glue filling and spraying coal surface and it meets the comprehensive fire prevention demand.

Description

technical field [0001] The invention belongs to the technical category of coal mine safety, and in particular relates to a plugging and fireproofing agent suitable for underground broken coal bodies in coal mines. [0002] It is especially suitable for coal mines with medium-thick coal seams with a coal seam thickness of more than 1.3m in the working face, high-gas mines with a relative gas emission of more than 10m3 / t, and an absolute gas emission of more than 40m3 / min, as well as underground coal mines that adopt fully mechanized top-coal caving technology. The need to get spontaneous. Background technique [0003] The main reason for fires (spontaneous combustion or spontaneous combustion) in coal mines is that when the mined coal is broken and the coal body is cracked, the underground ventilation creates the conditions for air leakage and oxygen supply to the broken coal body, and the coal has a stable supply. Under the condition of oxygen, it will continue to oxidize, ...

Claims

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Application Information

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IPC IPC(8): E21F5/08C09K21/02
Inventor 董曰喜翟所国张传业赵庆民陈足章刘增松孙瑞玉齐更亮
Owner 董曰喜