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Coal mine airtight wall and construction method thereof

A technology for closed walls and coal mines, applied in mining equipment, mining equipment, earthwork drilling, etc., which can solve the problems of long time required for sealing and high cost of packing

Inactive Publication Date: 2021-01-15
郑素珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another disadvantage of current fillers is the long time it takes to harden (4-8 hours) after application and achieve a significant seal
Another factor contributing to the high cost of using current fill is the need for large dry storage areas to accommodate the required raw materials and equipment

Method used

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  • Coal mine airtight wall and construction method thereof

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Effect test

Embodiment Construction

[0012] The airtight wall of the present invention is very effective in preventing air leakage in coal mines.

[0013] An airtight wall, the airtight wall includes a wall body 1, the wall body is lined by gangue 2, the gap between the gangue rocks is filled with a filler composition 3; Lay the metal mesh to form the metal mesh layer 4. Concrete shotcrete is carried out on the metal mesh layer 4. After the concrete is solidified, the concrete shotcrete layer 5 is formed, and passes through the concrete shotcrete layer and the metal mesh layer to the cracks and micropores of the coal wall in the broken zone. Then inject the filler composition to form the isolation layer 6; the filler composition includes alkali metal silicate, filler, water and modifier. The modifier prevents water softening of the filler composition after application. Advantageously, the modifier is a water-soluble or water-dispersible polymer. Various types of water-insoluble fillers can be used for the fille...

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PUM

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Abstract

The invention provides a coal mine airtight wall. The coal mine airtight wall comprises a wall body (1), a metal net layer (4) and an isolation layer (6). The wall body is formed by lining gangue (2),and gaps between the gangue are filled with a filler composition (3). The filler composition comprises alkali metal silicate, filler, water and a modifier; the alkali metal silicate is water glass; the filler is an inorganic filler and is finely divided, and the average particle size of the filler is less than 200 microns; and the modifier acts to render the composition insensitive to moisture, and is a water-soluble or water-dispersible acrylic polymer or copolymer having an average molecular weight of at least about 10,000. The filler composition for the airtight wall can be conveniently transported to a construction site and filled into the sealed gaps, and the non-toxic and non-volatile water-based filler composition is dried quickly, and is immediately sealed after being used to prevent air leakage, so that the airtight wall is tightly sealed.

Description

technical field [0001] The invention relates to a coal mine airtight wall and a construction method thereof. Background technique [0002] Containment walls are used to control and direct airflow through coal mine workings and to seal off sections of the mine. Containment walls are often installed in mines to direct airflow to the working face and prevent loss of airflow through unworked crosscuts and inlets. In mine ventilation, fresh air is conveyed under pressure to the working face and usually has to travel a considerable distance between the mine wellhead and the mine face. If the containment wall is not sufficiently airtight, the loss will reduce the rate at which the face is ventilated. [0003] In my country, coal spontaneous combustion is one of the most important disasters in coal mines. Coal walls, coal pillars, coal roadway elevations, and near faults that are in a broken state due to mining operations are high-incidence areas for coal spontaneous combustion. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/103C04B28/26
CPCC04B28/26E21F17/103C04B24/24C04B14/02
Inventor 不公告发明人
Owner 郑素珍