Hydraulic support for large-mining height caving coal

Abstract

The invention discloses a large mining height top coal caving hydraulic support and relates to the technical field of colliery coal mining supporting equipment and support equipment for large mining height top coal caving working face. The support comprises a pillar, a top beam and a base that the two ends thereof are articulated respectively, a front beam that is articulated to the front end of the top beam, a telescopic beam in the front beam, a side wall protection mechanism that is articulated with the telescopic beam, a shield beam that is articulated with the rear end of the top beam, a caving mechanism that is arranged at the rear the shield beam, a connecting-rod mechanism that is articulated between the rear of the base and the rear of the shield beam and four pillars which are articulated between the base and the top beam and can lead the maximum of the height of the support to be 4.0-5.2 meters, wherein the connecting-rod mechanism is provided with two front connecting rods and two rear connecting rods and has good stability, and a pedestrian passageway is formed between the two front connecting rods and the two rear connecting rods. The support has the characteristics of a top coal caving hydraulic support and a large mining hydraulic support, thus beneficial for safely and efficiently caving thick and super-thick coal seams, rationalizing the caving ratio, and ensuring gas dilution near a working face coal caving mouth.

Description

technical field [0001] The invention relates to the technical field of coal mining support equipment in coal mines, and belongs to a support equipment used for large mining and high top coal caving mining working faces. Background technique [0002] The top-coal caving hydraulic support is the key equipment of the top-coal caving mining method, and the innovation and development of the top-coal caving hydraulic support frame type is an important condition and symbol for the technical innovation and development of the top-coal caving mining method. At present, the maximum height of the top-coal caving support is generally within 3.5 meters. With the acceleration of coal mine mechanized mining and the change of geological conditions, the performance of these supports can no longer fully meet the requirements of thick and extra-thick coal seam mining. Under suitable conditions , Combining the advantages of top coal caving mining and large mining height fully mechanized mining m...

AI Technical Summary

Problems solved by technology

[0005] It is difficult to use double rear connecting rods for common roof coal caving hydraulic supports due to space limitations, mainly because the common support tail beam jack occupies the installation space of double rear connecting rods, so ordinary top coal caving hydraulic supports can only use single rear connecting rods. In the form of a rod, the support of this structure is unstable, the torsion resistance is poor, the maintenance of the rear of the support is inconvenient, the operator cannot grasp the working status of the rear of the support at any time, and the labor intensity increases

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