Method for constructing poured airtight walls of coal mines

Abstract

The invention discloses a method for constructing poured airtight walls of coal mines. The method includes manufacturing flexible molds and suspending the flexible molds in dug grooves with corresponding sizes by expansion pipes; allowing anchor rods on two sides of each dug groove to penetrate preserved anchor rod holes in the corresponding flexible mold; carrying out pouring twice, to be more specific, injecting inorganic solidifying materials into the flexible molds by concrete pump trucks to form solidified filling bodies at first, injecting expansion roof contact materials into the molds by grouting machines to form expansion filling bodies after the inorganic solidifying materials are completely coagulated, carrying out pump pouring on wall bodies and then forming the airtight walls with reinforced concrete structures by the walls and the anchor rods. The method has the advantages that the different materials are injected into the flexible molds twice, accordingly, the strength and roof contact effects of airtight wall bodies can be guaranteed, and the wall bodies prepared by the aid of the method are simple in structure; each airtight wall only comprises the single corresponding wall body and is mechanically constructed, accordingly, the costs of the airtight walls can be reduced, and the efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of closed walls in coal mines, and in particular relates to a construction method for pouring closed walls in coal mines. Background technique [0002] In the coal mine roadway system, there are stage service roadways such as connecting roadway and retreat roadway. During the recovery project of the working face, the contact roadway needs to be sealed; when the working face recovery is completed, the withdrawal roadway also needs to be sealed. Existing airtight methods include the method of pouring loess mud in the middle of the brick walls on both sides and the method of injecting solidified cement into soft mold bags. [0003] The airtightness of the brick wall and the loess wall requires cumbersome construction procedures, requires a lot of manpower, and takes a long time. In addition, manual feeding is required during the construction process, and organic materials such as Ma Lisan and Rock Hugh are us...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a coal mine pouring airtight wall construction method to solve the problems of high cost, long time consumption and poor roofing effect in the prior art construction.

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