Coal mine connecting roadway and sealing method thereof

Abstract

The invention discloses a coal mine tie roadway and a sealing method thereof. The coal mine tie roadway includes a solidified cement layer and a foamed cement layer vertically arranged in the coal mine tie wayway, and the solidified cement layer includes a first solidified cement layer and a foamed cement layer. The second solidified cement layer, the foamed cement layer is arranged between the first solidified cement layer and the second solidified cement layer, and the first solidified cement layer is also provided with a pouring hole for pouring foamed cement hole. The present invention uses less heat release after physical expansion and relatively cheap foamed cement material to fill the foamed cement layer, which can not only effectively reduce the sealing cost of coal mine connecting lanes, improve sealing efficiency, and reduce the possibility of spontaneous combustion of floating coal at the top of connecting lanes It also solves the problem of poor plasticity of the foamed cement by setting the solidified cement layer on both sides of the foamed cement layer, thereby helping to improve the sealing performance of the foamed cement layer.

Description

technical field [0001] The invention relates to a coal mine connecting lane and a sealing method thereof. Background technique [0002] In the prior art, high-yield and high-efficiency mines are mostly excavated with double lanes, and connecting lanes are set during the excavation process. During the mining process of the mine, the passing lanes need to be sealed to prevent air leakage into the goaf. The existing method of sealing the communication road first needs to pour a large amount of filling material into the brick wall after laying bricks or set up wooden boards and then fill the wooden boards with loess mud as the main material, and then fill the air leakage at the top of the communication road with polyurethane, Rock Hugh and other foaming materials. It can be seen that the filling of the existing contact roadway consumes a lot of manpower, material resources and time, and the filling cost is relatively high, which has a great impact on mine production efficiency....

AI Technical Summary

Problems solved by technology

It can be seen that the filling of the existing contact roadway consumes a lot of manpower, material resources and time, and the filling cost is relatively high, which has a great impact on mine production efficiency

In addition, the expansion process of foaming materials such as polyurethane belongs to chemical expansion, and due to the release of a large amount of heat due to chemical expansion, it is easy to cause spontaneous combustion of floating coal on the top of the communication roadway

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