Overlarge mining height hydraulic support

Abstract

The invention relates to a super large mining height hydraulic support which comprises an opened rigid integrated base, wherein, two double-telescopic hydraulic upright posts are arranged on the base, and the upper ends of the upright posts are connected with a top beam; the rear of the top beam is connected with a screening beam; an edge protection device is connected with the telescopic beams which are in inner extension connection with the top beam; a balance jack is arranged between the top beam and the screening beam; the screening beam and the base are respectively connected with the front and rear connecting rods; a push jack is arranged on the base and is connected with a push rod; the front part of the top beam is provided with the telescopic beams, the middle part of the top beam is provided with a falling prevention device for the support, and bottom lifting, skid prevention and support regulation devices are arranged on the base; and a levelling device is arranged on a cross binding head on the front end of the push rod; the support adopts 2-meter width between centers, the maximum height ranges from 6.3 meters to 7.5 meters, and the front end of the telescopic beam isprovided with a third-stage edge protection device which is not lower than half of the mining height. The support has obvious effects of controlling the wall caving of the coal wall of a super thick coalseam, the roof fall of the ceiling, and the stability of the hydraulic support.

Description

technical field [0001] The invention relates to a super large mining height hydraulic support, which belongs to the field of mining. Background technique [0002] It is an economical and reasonable mining method for thick coal seam mining with large mining height and one-time mining. It can not only reduce the workload of roadway excavation and mesh laying on the working face, but also improve the recovery rate of coal resources and improve the single-knife cutting rate of coal shearers. Reduce the amount of coal, reduce the gangue content rate, and create conditions for improving the production capacity of the working face. In recent years, my country has carried out a large-scale technical research on the high-height mining and full-height technology, and has solved the key problems of mining thick coal seams below 6 meters. The maximum height of hydraulic supports used in mines has reached 6.3 meters. At present, there are many mines in China using the method of large mi...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a super large mining height hydraulic support with a support height of 6.3 to 7.5 meters, to solve the stability and protection problems of the super large mining height type hydraulic support, so that this type of support can be adapted to 6 to 7.3 meters thick coal seam Full height mining at one time

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