Auxiliary support device for three-soft coal seam coal face hydraulic support

Abstract

The invention discloses an auxiliary support device for a three-soft coal seam coal face hydraulic support. The device comprises a lengthened beam large oil cylinder (1) with one end connected with a hinged support of a lengthened beam (16) and a telescopic beam (15), a large oil cylinder hoop (6) is arranged on the lengthened beam large oil cylinder (1), the large oil cylinder hoop (6) is connected with one end of a lengthened beam small oil cylinder (2), the other end of the lengthened beam small oil cylinder (2) is connected to the lower part of the lengthened beam by a lengthened beam small oil cylinder support (5), and the lengthened beam large oil cylinder (1) and the lengthened beam small oil cylinder (2) are connected respectively by an operating valve and an operating valve set (3). The auxiliary support device is used for solving the problem that the existing hydraulic supports are easy to sink and easy to incline, and a leg (namely the auxiliary support device) is additionally arranged for the support, so that the support is relatively steady and is great in support strength. Meanwhile, the use quantity of single pillars is reduced, the fault rate of single pillars is reduced, input of single pillars is reduced, support pulling speed is further promoted, and design aims of being convenient to operate, high in safety performance and uneasy to damage and reducing the labor intensity of workers are achieved.

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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