Pressure-resistant and pressure-relieving bricks for closed walls in coal mines and their masonry methods

Abstract

The invention discloses pressure resistance and pressure relief bricks for a coal mine underground seal wall and a construction method of the seal wall. The pressure resistance and pressure relief bricks are formed by ceramsite and bounding agent; the bounding agent is formed by multi-iso-cyanogens phenol resin and polyester polyol; a weight ratio of the iso-cyanogens phenol resin and the polyester polyol is 1: 0.8 to 1: 1.2; and a weight ratio of the ceramsite and the bounding agent is 1: 1 to 1: 1.5. The construction method of the seal wall comprises adding a sand and rock bedding layer to a catching groove of the bottom face of a tunnel which is under the seal wall and performing construction above the sand and rock bedding layer with one or two layers of pressure resistance and pressure relief bricks; constructing a main wall body of the seal wall with red bricks; and constructing the connecting positions of the lateral side and the top face of the tunnel and the seal wall with one or two layers of pressure resistance and pressure relief bricks. When pressure is performed on the tunnel, the pressure resistance and pressure relief bricks well absorb the pressure due to the capability of contracting and deforming to be a half; accordingly the service life of the seal wall is prolonged; maintaining times of the seal wall are reduced; and the pressure resistance and pressure relief bricks can be reused to reduce the construction cost and maintenance cost of the seal wall.

Description

technical field [0001] The invention relates to the technical field of masonry materials for an airtight wall of an underground damper or an airtight wall, in particular to a pressure-resistant and pressure-relieving brick for an airtight wall in an underground coal mine and a masonry method thereof. Background technique [0002] my country is one of the countries with the richest coal reserves in the world. my country has a long history of using coal, which is inferior to any country in the world. my country's coal reserves have been proven to be about 600 billion tons. Coal plays a very important role in the national economy. Mine ventilation is a key link in coal mine safety production. According to the investigation results of many coal mine accidents, major disasters and accidents in coal mines are generally closely related to the mine ventilation system. Therefore, it is particularly important to establish a stable, reliable and simple ventilation system. Mine vent...

AI Technical Summary

Problems solved by technology

[0003] The quality of the airtight wall is not only related to the amount of air leakage, but also related to the ventilation quality of the entire coal mine. If the airtight material, mechanism and building location are improperly selected, the airtight wall will be fractured, crushed, and cause serious accidents

For a long time, airtight walls have been built with red bricks, or with coal powder ash bricks, or added materials such as wood during the wall-building process. After a while, the red bricks began to break, the airtight maintenance required a lot, the airtight effect was not good, and the airtight materials could not be reused

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