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Method for retracting surplus hydraulic supports of fully mechanized mining face

A fully mechanized mining face and hydraulic support technology, which is applied in pillars/supports, mining equipment, earthwork drilling and mining, etc., can solve problems that are not worth popularizing, many manpower, material resources, long time, etc., and achieve wide practicability and process Simple, easy-to-operate effects

Inactive Publication Date: 2013-04-03
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, in order to withdraw one or two hydraulic supports, so much manpower and material resources are invested, and it takes such a long time, it is really helpless and not worth popularizing

Method used

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  • Method for retracting surplus hydraulic supports of fully mechanized mining face
  • Method for retracting surplus hydraulic supports of fully mechanized mining face

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Embodiment Construction

[0014] Implementation of the present invention will be further described below in conjunction with accompanying drawing:

[0015] Such as figure 1 As shown, the method for retracting redundant hydraulic supports in the fully mechanized mining face of the present invention: first, utilize the existing return column winch of the return air level roadway to pull the hydraulic supports to the loading position 30-50m away from the end, and Position the hydraulic support 8 that needs to be retracted and slowly rise, so that the hydraulic support top beam 3 is in overall contact with the roadway roof 1. If the roof is not flat, you can add a backing plate or a road log; A plurality of single pillars 4 are arranged symmetrically below the 2. The number of multiple single pillars 4 is not less than 6, such as figure 2 As shown, there are four symmetrically arranged under the top beam 3 of the hydraulic support, and two symmetrically arranged under the front beam 2 of the hydraulic s...

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Abstract

The invention discloses a method for retracting surplus hydraulic supports of a fully mechanized mining face, comprising the following steps: pulling hydraulic supports needing to be retracted to the loading position 30-50m away from an end head by utilizing a drawing hoist of a tailgate; slowly lifting the hydraulic supports; leading the top beams of the hydraulic supports to be contacted with aroadway roof entirely; hitting a plurality of single props below the top beam and the front beam of the hydraulic support; piling a plurality of single props under the top beams and the front beams of the hydraulic supports; tightly fixing the top beams and the front beams of the hydraulic supports on a roof, and then starting to retract stand columns of the hydraulic supports; hoisting bases of the hydraulic supports to a certain height away from the surface of a roadway, and stopping hoisting; moving a flat bed trailer under the hydraulic supports; slowly lifting the stand columns of the hydraulic supports; leading the bases of the hydraulic supports to stably land on the flat bed trailer, and lifting and tightening the stand columns; taking off the single props under the hydraulic support one by one; dropping the hydraulic supports to the lowest position slowly; and finally binding the hydraulic supports firmly on the flat bed trailer to be transported. The method has simple procedures, high operability, high hydraulic support retracement efficiency, and wide practicability.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method suitable for retracting redundant hydraulic supports in a fully mechanized mining face due to the shortened length of the working face. Background technique [0002] In the comprehensive mechanized mining process of the geologically complex working face, the length of the working face is shortened due to the change of the coal seam inclination angle of the working face or other reasons, making it difficult to place equipment, and it is necessary to withdraw the redundant hydraulic supports. At present, my country's coal mines have no effective treatment methods for the redundant hydraulic supports that appear in the retracted working face. Most of them adopt the overall relocation of the working face or the recovery method that needs to withdraw the hydraulic supports of the entire working face after the mining is completed: set up a loading platform and a lifting dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/60
Inventor 马立强曹新奇张东升
Owner CHINA UNIV OF MINING & TECH
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