A combined tray for deep coal mine roadway support

By designing a combination of small and large circular pallets, rubber pads, and stress support rings, the problems of easy pallet failure and difficulty in worker identification in deep coal mine roadway support were solved, achieving efficient and stable support and simplifying construction.

CN224379882UActive Publication Date: 2026-06-19HUAINAN MINING IND GRP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUAINAN MINING IND GRP
Filing Date
2025-07-16
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In deep coal mine roadways, where initial ground stress is high and mining stress is concentrated, commonly used support trays are prone to failure. Furthermore, under underground conditions, it is difficult for workers to identify and install multi-level support trays, leading to unstable support and high labor intensity.

Method used

Design a combined pallet comprising small and large circular hollow hemispherical pallets, a rubber pad, a stress support ring, and a support block. Through the combination of anchor cables, anchors, and spring plates, stress is dispersed and stabilized, and it is easy for workers to identify and install in dim conditions.

Benefits of technology

It improves the load-bearing capacity and stability of the pallet, reduces pallet eccentric loading, simplifies the construction process, reduces the labor intensity of workers, and ensures the efficiency and safety of roadway support.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the field of coal mine roadway support, specifically a combined pallet for deep coal mine roadway support. It includes a small circular pallet, a large circular pallet for support, a support block and a stress support ring for balancing the stress between the small and large circular pallets, and anchors for fixing anchor cables. Both the large and small circular pallets are hollow hemispherical structures with an outer ring structure. The small circular pallet is installed on top of the large circular pallet. A rubber pad is placed between the bottom of the small circular pallet and the large circular pallet. The stress support ring is formed on the outside of the spherical end face of the large circular pallet, and the support block is formed on the inner end face of the spherical shape of the small circular pallet. This utility model utilizes the coordinated action of the large and small circular pallets and the rubber pad, along with the stress support ring and support block on the inner side, to disperse local stress and improve the load-bearing capacity of the anchor pallet. Furthermore, by limiting the preload by locking the snap-fit ​​area behind the stress support ring during installation, the preload can be clearly defined.
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