Hydraulic support set special for withdrawing of hydraulic support of coal mine fully-mechanized coal mining working face and withdrawing method thereof

Abstract

The invention discloses a hydraulic support set special for withdrawing of a hydraulic support of a coal mine fully-mechanized coal mining working face and a withdrawing method thereof. The support set comprises a horizontal hydraulic support and a vertical hydraulic support. The horizontal hydraulic support is vertically arranged on the front end of the vertical hydraulic support, a horizontal retractable part for shifting opposite to each other in the length direction of the vertical hydraulic support is arranged between the horizontal hydraulic support and the vertical hydraulic support, one end of the horizontal retractable part is connected with the horizontal hydraulic support, and the other end of the horizontal retractable part is connected with the vertical hydraulic support. During withdrawing of the support, the support set composed of the horizontal hydraulic support and the vertical hydraulic support supports an exposed top plate timely and automatically, timely effectivesupporting is achieved, personnel work under the top plate with supporting, the production function on personnel and equipment is achieved, and the safety is higher.

Description

technical field [0001] The invention relates to the technical field of mining safety, in particular to a special hydraulic support set and a withdrawal method for the hydraulic support of a coal mine fully mechanized mining face. Background technique [0002] With the continuous improvement of the level of coal mining technology, the specifications and sizes of large-scale equipment continue to increase, especially the use of hydraulic supports for large-scale fully mechanized mining with large working resistance and large mining heights is becoming more and more widely used, and the withdrawal process of supports also needs continuous improvement and improvement Complete. [0003] At present, in the large domestic coal mines mainly in Inner Mongolia and Shaanxi, the support withdrawal process is mainly based on the single and double lane withdrawal process. Such as figure 1 As shown, the specific method is: use the stacked support D, single column, anchor rod and anchor c...

AI Technical Summary

Problems solved by technology

[0005] A. Low safety: With wooden crib support, personnel need to work under the unsupported roof, which has safety risks. The wooden crib has poor stability, and the height cannot be adjusted. It cannot actively support the roof in the withdrawal triangle area, and the ability to support and protect the roof poor

[0006] B. Low efficiency: Manually erecting wooden stacks takes a long time, low efficiency, and long retraction time of the working face

[0007] C. High cost: Wooden stacks are not recyclable, resulting in waste of raw materials

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