Temporary advanced support device

Abstract

The invention discloses a temporary advanced support device, and belongs to the technical field of mine support. The device comprises a single hydraulic supporting column and an expanding top beam, wherein the expanding top beam is a connecting rod mechanism mainly composed of a machine frame, upper connecting rods, a top beam frame, supporting rods, a supporting frame and lower connecting rods, the middle of the supporting frame is fixedly provided with a supporting base rod, the top beam frame is provided with a connecting rod, the lower portion of the machine frame is symmetrically provided with a pair of the upper connecting rods in a hinged mode, the lower ends of the upper connecting rods are hinged to the connecting rod at hinging points b, the upper ends of the supporting rods are hinged to the top beam frame at hinging points c, the lower ends of the supporting rods are hinged to the supporting frame at hinging points d, one end of each lower connecting rod is hinged to the corresponding upper connecting rod, the other end of each lower connecting rod is hinged to the supporting base rod, and front projections of the hinging points c, the hinging points b and the hinging points d are on the same inclined line when the top beam is completely expanded. The temporary advanced support device is easy to operate, large in support coverage area and convenient to retract, expand and support, and the weight of the product is reduced.

Description

technical field [0001] The invention relates to a temporary advance roof support device suitable for blasting working faces, and belongs to the technical field of mine support equipment. Background technique [0002] There will be problems in the blasting working face when there is no temporary support during the operation after the blasting, and the safety of the staff will be threatened by the fall of gangue and the fall of the roof. Drilling and blasting in the next process. Article 41 of the "Coal Mine Safety Regulations" on roadway support stipulates that empty top operations are strictly prohibited on the excavation face. The support within 10 meters close to the excavation face must be strengthened before blasting. Blasting collapsed and collapsed supports must be repaired before entering the working face for operation. When repairing the bracket, the top and side must be checked first, and it should be carried out one by one from the outside to the inside. [000...

AI Technical Summary

Problems solved by technology

First, it is inconvenient to erect and remove support devices, except for wooden pillars (rarely used now)

Because most of them are used in conjunction with metal hinged roof beams and single hydraulic props, it will take a lot of time to install the hinged beams, and it cannot be used when there are geological structures and roof fluctuations, and it is easy to collapse. The surface is easily knocked down and damaged by the cutting head of the roadheader, which also restricts production

Second, because the individual pillars of the device used in conjunction with the pillars are not working with synchronous hydraulic cylinders, when they are hinged together for use, each pillar must have a worker to inject liquid at the same time when the pillar is raised, so more workers are required, and the operation requirements strict

Third, the temporary support is bulky, cumbersome, consumes a lot of materials, and requires a lot of man-hours when moving forward, with many personnel and high labor intensity, which affects the progress of rock loading and roadway excavation

Fourth, for point column support, first, the support area is small, and the exposed rock mass cannot be fully supported, and there is a phenomenon of roof leakage; second, the single support cannot form a joint support, and it is easy to fall under pressure; The blasting face is prone to blasting and collapsing

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