Retracement method for fan section of fully-mechanized coal mining retracement working face

Abstract

The embodiment of the invention discloses a retracement method for a fan section of a fully-mechanized coal mining retracement working face. The retracement method comprises the steps that a supporting support is mounted in the fan section, wherein the supporting support supports a fan section top plate; a first hydraulic support to be retraced is drawn out; after the first hydraulic support to beretracted is drawn out, the supporting support moves in the direction close to a second hydraulic support to be retraced by rubbing the top plate; when the supporting support moves in the direction close to the second hydraulic support to be retraced by rubbing the top plate for a first preset distance, the supporting height of the supporting support is increased; when the supporting height of the supporting support is increased to first preset height, the second hydraulic support to be retraced is drawn out. According to the retracement method, the retracement efficiency can be improved, andthe retracement cost can be reduced.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of coal mining, and in particular to a method for withdrawing a fan-shaped area of ​​a fully-mechanized mining withdrawing working face. Background technique [0002] When retracting the hydraulic support in the fully mechanized mining face, the existing method is to use a cover support to maintain the roof of the retracted channel of the fully mechanized mining face, and for the sector area of ​​the retracted channel of the fully mechanized mining face, use a single hydraulic prop Cooperate with the π-shaped beam shed, that is, "one beam and three pillars steel shed" to maintain the roof. When the first hydraulic support to be withdrawn close to the fan-shaped area is retracted, two steel sheds with one beam and three columns need to be erected on the roof of the original position of the first hydraulic support, and then the two steel sheds with one beam and three columns in the fa...

AI Technical Summary

Problems solved by technology

Due to the shortcomings of the support method of the one-beam and three-column steel shed, such as large roof control area, high pressure on the roof in the fan-shaped area, difficulty in roof management, and high safety risks, accidents such as large-scale roof sinking, roof leakage, and knockdown of the shed are prone to occur, especially On the working face with soft roof or bottom and severe mudification, the bottom of the single hydraulic prop is seriously drilled, and the support strength is poor. When the one-beam and three-column steel shed is manually disassembled, the roof is prone to collapse and the safety is poor.

[0003] In addition, wooden piles are used to maintain the fan-shaped roof of the working face where the roof is broken, separated, and the mesh is seriously torn. Every other hydraulic support to be withdrawn is extracted from a hydraulic support to be withdrawn. After the hydraulic support is extracted, it is supported by a well-shaped wooden pile, and then Recirculation and retraction of hydraulic supports, no recycling of supporting wood stacks, high retraction costs

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