Large extraction high caving roof coal hydraulic support

A hydraulic support and top-coal caving technology, which is applied to the mine roof support, mining equipment, earthwork drilling and mining, etc., can solve the problems of low mechanical mining height of the top-coal caving support, influence on coal quality, waste of coal resources, etc., and achieve coal caving High recovery rate, good coal discharge effect, and small force on the coal machine

Inactive Publication Date: 2009-05-27
ZAOZHUANG MINING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical mining height of the top-coal caving support with this structure is low. For the 4-5m thick coal seam, it is a waste of coal resources to only mine or not. The top-coal caving will cause gangue and affect coal quality.

Method used

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  • Large extraction high caving roof coal hydraulic support

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Effect test

Embodiment 1

[0021] As shown in Figure 1, the hydraulic support for large mining and high coal caving of the present invention includes the base 1, the column 2, the top beam 9, the front beam 13 and the cover beam 7, the tail beam 6 and the inserting plate 5, the top The beam 9 is supported on the base 1 by four uprights 2, and the uprights are provided with alternate check valves to realize chain control and avoid crushing the support. The base 1 is a rigid split base, and the push rod 3 is located on the inner shelf of the base. The front end of the base is equipped with a bottom lifting device connected with a vertical bottom lifting jack 11. The bottom lifting device reduces the specific pressure at the front end of the base to ensure smooth movement. The key part of the frame, the middle of the base is connected with a horizontal moving jack 15, and the bottom lifting jack 11 and the moving jack 15 other ends act on the push rod 3 respectively. One end of the push rod 3 is connected ...

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PUM

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Abstract

The invention relates to a top coal caving hydraulic bracket with large mining height. The hydraulic bracket comprises a base, upright posts, a top beam, a front beam, a shield beam, a tail beam and an insertion plate; the top beam is supported on the base through four upright posts; the front beam and the shield beam are hinged with the front end and the rear end of the top beam respectively; the shield beam is also connected with a connecting rod; the front part of the front beam is provided with a telescopic beam which is connected with the front beam through a telescopic beam jack; the front end of the telescopic beam is hinged with the rear part of a protective plate; one end of a protective plate jack is connected with the telescopic beam; the other end pf the protective plate jack is connected with the tail part of the protective plate; the front end of the tail beam is hinged with the shield beam; the other end of the tail beam is connected with the shield beam through a tail beam jack; and the insertion plate is positioned in the inside of the tail beam. The hydraulic bracket has the advantages that the hydraulic bracket has large mining height and high working resistance, can realize top coal caving and can also realize overall height mining once when the thickness of the coal is 4.5 meters.

Description

technical field [0001] The invention relates to support equipment for mines, in particular to a hydraulic support for large mining and high caving coal. Background technique [0002] The essence of comprehensive mechanized mining of top-coal caving is to arrange a fully-mechanized mining face at the bottom of the mining coal seam. In addition to using the normal three machines (shearer, conveyor and hydraulic support) to mine coal, it also uses mine pressure or supplemented by manual loosening. The method breaks the top coal on the working face and releases or recovers it in front or behind as the working face advances. As one of the most important equipments in comprehensive mechanized mining of top-coal caving, the performance and quality of hydraulic support for top-coal caving directly affect the development of comprehensive mechanized mining of top-coal caving. The bottom of the existing working face low-position coal hydraulic support is a base, the top beam is suppor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D23/04
Inventor 江卫王明南李景恒林万令靖大鹏刘宪亮冀庆来张波梁开东孙洪霞韩河马军张严敬冯栋田霜李玉刚石虎郑伟庞静孙卓辉
Owner ZAOZHUANG MINING GRP CO LTD
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