Withdrawal working face flexible shield type reserved return air passage and manufacturing method thereof

Abstract

The invention relates to a withdrawal working face flexible shield type reserved return air passage and a manufacturing method thereof. The passage includes several I-beams, wire ropes, U-shaped clamps and anchor nets and is located at an entrance of the withdrawal passage between a working face and a coal wall, supports are laid on the coal wall, an upper end of each I-beam is fixed on the support of the coal wall, a lower end of each I-beam is fixed on the ground of the withdrawal passage, each of the I-beams forms an acute angle with the coal wall, the I-beams are respectively parallel to each other, an outer side of each I-beam is connected with multiple wire ropes, one end of each of the wire ropes is connected with the outermost I-beam, the wire ropes pass through each of the I-beams, the connection portion of each wire rope and each I-beam is fixed through one U-shaped clamp, the other end of each of the wire ropes is fixed on a corresponding anchor rod of the coal wall, the steel wire ropes are parallel to each other and parallel to the ground of the withdrawal passage, a layer of anchor nets is laid on the steel wire ropes and the I-beams, and the anchor nets are fixed onthe wire ropes and the I-beams through wires.

Description

technical field [0001] The invention relates to a flexible cover-type reserved return air channel for a retracted working face and a manufacturing method thereof, which is used for reserving a stable triangular return air channel for the retracted working face. Background technique [0002] For a long time, when retracting the hydraulic support in the fully mechanized mining face of the underground coal mine, it is necessary to reserve the return air channel in the retraction channel to ensure the normal full negative pressure ventilation of the working face. The return air channel is mostly maintained by constructing a large number of wooden point columns or wooden piles in the retraction channel of the working face. The construction of wooden point columns and wooden stacks in the retraction channel has problems such as heavy workload, high labor intensity, high safety risk, high support cost, poor maintenance effect, and easy blockage of the return air channel, which affe...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention of this application is to solve the problem that the wooden point columns and wooden stacks in the existing retraction passage are easy to block the return air passage, and to provide a flexible cover-type reserved return air passage for the retraction working face and its manufacture. method

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