Coal mine connection roadway and sealing method thereof

Abstract

The invention discloses a coal mine connection roadway and a sealing method thereof. The coal mine connection roadway comprises solidified cement layers and a foamed cement layer, wherein the solidified cement layers and the foamed cement layer are vertically arranged in the coal mine connection roadway; the solidified cement layers comprise a first solidified cement layer and a second solidified cement layer; the foamed cement layer is arranged between the first solidified cement layer and the second solidified cement layer; filling holes which are used for filling foamed cement are further formed in the first solidified cement layer. The foamed cement layer is filled by foamed cement materials which are less in heat release after being physically expanded and relatively low in cost, so that the sealing cost of the coal mine connection roadway can be effectively reduced, the sealing efficiency is improved, and the spontaneous combustion possibility of float coal at the top of the connection roadway is reduced; by virtue of the solidified cement layers arranged on two sides of the foamed cement layer, the problem that the foamed cement is low in plasticity is solved, so that the sealing property of the foamed cement layer is improved favorably.

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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