A hydraulic support for coal pillar recovery

By designing hydraulic supports with side support mechanisms and side pushing devices, the problems of insufficient support and single pushing direction of traditional supports in coal pillar recovery are solved, thereby improving safety and efficiency and adapting to complex coal pillar recovery spaces.

CN224315022UActive Publication Date: 2026-06-02SHANXI GUXIAN LAOMUPO COAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANXI GUXIAN LAOMUPO COAL CO LTD
Filing Date
2025-07-15
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional hydraulic supports cannot effectively support the coal wall exposed laterally by the coal pillar, and their unidirectional movement makes them difficult to adapt to the complex and ever-changing coal pillar recovery space, resulting in high safety risks and low operational efficiency.

Method used

A hydraulic support for coal pillar recovery was designed, comprising a side-protecting mechanism, a side-pushing device, and a pushing mechanism. The side-protecting hydraulic cylinder drives the side-protecting plate to swing within the range of 0° to 180°, the side-pushing hydraulic cylinder pushes the adjacent support or coal wall, and the pushing hydraulic cylinder is connected to the scraper conveyor to achieve synchronous transportation, adapting to complex spatial orientations.

Benefits of technology

It significantly reduced the risk of coal wall spalling, improved the strength and safety of local support, enabled the simultaneous movement of the support and coal transportation, and improved the efficiency and resource recovery rate of coal pillar recovery operations.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224315022U_ABST
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Abstract

The utility model discloses a hydraulic support for coal pillar recovery, which includes a top beam, a base, hydraulic supports, a coal face protection mechanism, a side push device and a pushing mechanism. The top beam is located at the top of the support, and the base is located at the bottom of the support. The two are vertically and fixedly connected by at least two hydraulic supports. The coal face protection mechanism is hinged to the front end of the top beam and swings up and down around the hinge point. The side push devices are symmetrically arranged on both sides of the top beam. The pushing mechanism is installed at the front end of the base and is used to push the support forward and connect the scraper conveyor. The advantages of the utility model compared with the prior art are as follows: in terms of support safety, the side push device drives the push plate to push the adjacent support and the roadway coal wall through the side push hydraulic cylinder, greatly reducing the risk of coal wall spalling caused by stress concentration; in terms of improving operation efficiency, the pushing hydraulic cylinder, the push rod and the connecting head of the pushing mechanism are directly connected to the scraper conveyor, realizing the synchronous progress of the self-movement of the support and the coal transportation, and reducing the equipment idling and the process connection time.
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