Coal mine down hole fireproof airtight wall construction method

Abstract

The invention discloses a coal mine down hole fireproof airtight wall construction method. The method comprises the following steps that three cuttings are dug upward on the circumference of the inner wall of a roadway, the three cuttings is the first cutting, the second cutting and the third cutting; the thickness of red machine brick protection walls and the red machine brick covering walls are arranged according to the fracture surface of the roadway, and the red machine brick protection walls and the red machine brick covering walls are piled in the first cutting and the third cutting correspondingly; a concrete bone wall is poured in the second cutting; first filling materials are filled into filling layers between concrete bone walls and the red machine brick protection walls; and after the red machine brick protection walls are piled completely, second filling materials are injected into the filling layers, so that gaps between the first filling materials in the filling layers and the roof of the roadway are fully filled. The coal mine down hole fireproof airtight wall construction method can be utilized to prevent gas of a work-out area from penetrating to the pedestrian roadway.

Description

technical field [0001] The invention relates to fire prevention in coal mines, in particular to a method for constructing an underground fireproof airtight wall in coal mines. Background technique [0002] The coal mine underground fireproof closed wall refers to the wall connected with the goaf to eliminate the air leakage channel or reduce the pressure difference of the air leakage. The function of the fireproof airtight wall in the coal mine is, on the one hand, to limit or prevent the air from flowing into and penetrating into the coal body, to reduce the contact between oxygen and spontaneous combustion coal, and to prevent spontaneous combustion in the goaf; Toxic and harmful gas leaks into the pedestrian roadway, causing personal injury. [0003] At present, there are various structures of fireproof closed walls in coal mines at home and abroad. In the traditional fireproof closed wall, due to the gap between the wall and the coal side, or the cracks in the wall its...

AI Technical Summary

Problems solved by technology

In the traditional fireproof closed wall, due to the gap between the wall and the coal side, or the cracks in the wall itself due to the mine pressure, the toxic and harmful gas in the goaf seeps into the road through the gap, posing a threat to the safety of workers.

At present, the fire-proof airtight wall constructed of various rare polymer materials not only uses a large amount of polymer materials, but also has a high cost of construction, and also pollutes the underground water body.

At the same time, there is a certain degree of harm to the staff when they come into contact with polymer materials.

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