A hydraulic support auxiliary support device for coal mining face in three soft coal seams

Abstract

The invention discloses a hydraulic support auxiliary support device for a coal mining face in a three-soft coal seam, which comprises a large oil cylinder (1) with an extended beam (1) connected at one end to the hinged support of the extended beam (16) and the telescopic beam (15). The oil cylinder (1) is provided with a large oil cylinder hoop (6), and the large oil cylinder hoop (6) is connected to one end of the small oil cylinder (2) of the extended beam, and the other end of the small oil cylinder (2) of the extended beam passes through the support of the small oil cylinder of the extended beam (5) It is connected with the bottom of the extended beam, and the large oil cylinder of the extended beam (1) and the small oil cylinder of the extended beam (2) are respectively connected with the control valve group (3) through the control valve. The invention solves the problem that the existing hydraulic support is easy to bury the head and is easy to skew, and a "foot" is added to the support, so that the support is more stable and the support strength is increased. At the same time, the number of single columns used is reduced, the damage rate of single columns is reduced, the input of single columns is reduced, the speed of pulling frames is further accelerated, and the advantages of convenient operation, high safety performance, less damage and reduced labor intensity of staff are realized. aim of design.

Description

technical field [0001] The invention relates to an auxiliary support device for hydraulic supports in coal mining working faces of three soft coal seams, in particular to prevent the hydraulic support of coal mining working faces in "three soft" coal seams by controlling telescopic beams and extended beams The structure with problems such as bracket pressing and countersunk, dead frame, etc. Background technique [0002] The three soft coal seams refer to the soft roof strata, soft main mining coal seams and soft coal seam floor strata encountered in coal mining. Generally, the coal seams and roof and floor strata of coal mines with three soft characteristics are weak rock strata. The coal seam has well-developed fissures and complex structure. For the three-soft coal seam, the conventional hydraulic support cannot solve the problem of supporting the roof, and the mining face is prone to chipping and roof leakage. For example, at the 13171 fully mechanized mining face of H...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide an auxiliary support device for hydraulic supports in the coal mining face of three soft coal seams, which can solve the problems that the existing hydraulic supports are easy to bury and skew, and at the same time reduce the number of single columns used, and reduce the number of single The damage of the column can reduce the input of single column, further speed up the pulling frame speed, realize the purpose of convenient operation, high safety performance, not easy to be damaged and reduce the labor intensity of the staff

[0006] After the extended beam is assembled, the base of the bracket is unstable, and the bracket is prone to sinking and skewing. After adding the large oil cylinder of the extended beam, the bracket sinking phenomenon is solved.

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