Reinforced supporting structure for large-span chamber of coal mine
By employing upper and lower arched support plates and a stress-dispersing stabilizing structure in large-span coal mine chambers, and utilizing anchor bolt support to distribute the top pressure to the sidewalls of the chambers, the problem of uneven stress distribution was solved, and the overall stability and safety were improved.
Patent Information
- Application Number
- CN202520851930.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-30
AI Technical Summary
In existing coal mines, large-span chambers have difficulty effectively dispersing stress in their support structures, resulting in excessive load on the arched support plates and affecting overall stability and safety.
The structure employs a combination of upper and lower arched support plates and a stress-dispersing stabilizing structure. The top pressure is distributed to the sidewalls of the chamber through the anchor support structure, and the pressure is transmitted by stress-sharing blocks and threaded rods, thereby reducing the burden on the arched support plates.
This effectively dispersed stress, improved the stability and safety of the chamber, reduced the burden on the arch support plate, and ensured the smooth progress of underground mining.
Smart Images
Figure CN223923069U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a support structure, and more particularly to a reinforced support structure for large-span coal mine chambers. Background Technology
[0002] In large-span coal mine chambers, rock bolts and cables are used to reinforce the surrounding rock, combined with shotcrete and steel arch supports to form a composite support system. This effectively improves the stability and safety of the chambers, ensuring the smooth progress of underground mining operations. This method can be flexibly adjusted for different geological conditions and is a key technical approach for achieving enhanced support in mines.
[0003] In order to disperse stress, large-span coal mine chambers generally adopt circular or elliptical cross sections instead of rectangular cross sections. Strengthening the connection of the arched support plates supporting the top helps to disperse stress and improve overall stability. Utility Model Content
[0004] The purpose of this utility model is to provide a reinforced support structure for large-span coal mine chambers to solve the above-mentioned technical problems.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a reinforced support structure for a large-span coal mine chamber, comprising a base plate, pillars, an upper arched support plate, support blocks, a lower arched support plate, support grooves, a stress dispersion and stabilization structure, and an anchor bolt support structure. Pillars are fixed to the tops of the left and right base plates respectively. The upper arched support plate is installed at the tops of the left and right pillars. The support blocks are fixed to the upper inner side of the pillars respectively. The lower arched support plate is fixed to the tops of the left and right support blocks. The support groove is formed between the upper and lower arched support plates. The stress dispersion and stabilization structure is installed in the front and rear support grooves. The anchor bolt support structure is installed on the left and right sides of the stress dispersion and stabilization structure respectively.
[0006] Based on the above technical solution, the stress dispersion and stabilization structure includes side pads, anchor bolt mounting holes, threaded joints, threaded rods, nuts, and stress-sharing blocks. Anchor bolt mounting holes are respectively opened in the middle of the left and right side pads, and the anchor bolt support structure is anchored to the side wall of the chamber through the anchor bolt mounting holes. The threaded joints are respectively fixed to the front and rear parts of the inner end of the side pads. The front and rear threaded rods are respectively threaded to the threaded joints. The nuts are installed on the threaded rods through the inner side of the threaded joints. The stress-sharing blocks are connected to the outer end of the threaded rods, and the stress-sharing blocks correspond to the support grooves.
[0007] Based on the above technical solution, the anchor bolt support structure provides stable support for the upper arch support plate and the lower arch support plate through a stress dispersion stabilization structure.
[0008] Compared with the prior art, this utility model has the following advantages: By setting up upper and lower arched support plates to install a stress-dispersing and stabilizing structure, this utility model provides stable support while distributing the top pressure to the sidewalls of the chamber, thus reducing the load on the arched support plates. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the appearance and structure of this utility model.
[0010] Figure 2 This is a schematic diagram of the support groove structure of this utility model.
[0011] Figure 3 This is a schematic diagram of the stress dispersion and stabilization structure of this utility model.
[0012] In the diagram: 1. Base plate, 2. Support column, 3. Upper arched support plate, 4. Support block, 5. Lower arched support plate, 6. Support groove, 7. Stress dispersion stabilizing structure, 8. Anchoring support structure, 9. Side pad, 10. Anchor bolt mounting hole, 11. Threaded joint, 12. Threaded rod, 13. Nut, 14. Stress sharing block. Detailed Implementation
[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0014] like Figures 1 to 3 As shown, a reinforced support structure for a large-span coal mine chamber includes a base plate 1, pillars 2, an upper arched support plate 3, support blocks 4, a lower arched support plate 5, support grooves 6, a stress dispersion and stabilization structure 7, and an anchor bolt support structure 8. The tops of the left and right base plates 1 are respectively fixed to the pillars 2. The upper arched support plate 3 is installed on the tops of the left and right pillars 2. The support blocks 4 are respectively fixed to the upper inner side of the pillars 2. The lower arched support plate 5 is fixed to the tops of the left and right support blocks 4. The support groove 6 is formed between the upper arched support plate 3 and the lower arched support plate 5. The stress dispersion and stabilization structure 7 is installed in the front and rear support grooves 6. The anchor bolt support structure 8 is installed on the left and right sides of the stress dispersion and stabilization structure 7.
[0015] The stress-dispersing and stabilizing structure 7 includes side pads 9, anchor bolt mounting holes 10, threaded joints 11, threaded rods 12, nuts 13, and stress-sharing blocks 14. Anchor bolt mounting holes 10 are respectively opened in the middle of the left and right side pads 9, and the anchor bolt support structure 8 is anchored to the side wall of the chamber through the anchor bolt mounting holes 10. The threaded joints 11 are respectively fixed to the front and rear parts of the inner end of the side pads 9. The front and rear threaded rods 12 are respectively threaded to the threaded joints 11. The nuts 13 are installed on the threaded rods 12 through the inner side of the threaded joints 11. The stress-sharing blocks 14 are connected to the outer end of the threaded rods 12, and the stress-sharing blocks 14 correspond to the support grooves 6.
[0016] The anchor support structure 8 provides stable support for the upper arched support plate 3 and the lower arched support plate 5 through the stress dispersion stabilization structure 7.
[0017] The working principle of this utility model is as follows: The top of the large-span chamber is supported by an upper arched support plate 3. The upper arched support plate 3 distributes the stress of the chamber top to the stress-sharing blocks 14 in the support groove 6. Under the support of the lower arched support plate 5, the stress-sharing blocks 14 transmit the pressure to the side pads 9 through threaded rods 12. The side pads 9 distribute the pressure to the side walls of the chamber through the anchor support structure 8. This provides stable support while reducing the burden on the upper arched support plate 3.
[0018] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.
Claims
1. A large-span chamber reinforcement support structure for coal mines, comprising a floor (1), a support column (2), an upper arched support plate (3), a support block (4), a lower arched support plate (5), a support groove (6), a stress dispersion and stabilization structure (7), and an anchor rod support structure (8), characterized in that: The left and right ends of the bottom plate (1) are respectively fixed with a support column (2), the upper arched support plate (3) is installed at the top of the left and right support columns (2), the support block (4) is respectively fixed on the upper part of the inner side of the support column (2), the lower arched support plate (5) is fixed on the top of the left and right support blocks (4), the support groove (6) is formed between the upper arched support plate (3) and the lower arched support plate (5), the stress dispersion and stabilization structure (7) is installed on the front and rear support grooves (6), and the anchor rod support structure (8) is respectively installed on the left and right parts of the stress dispersion and stabilization structure (7).
2. The large-span chamber reinforced support structure of a coal mine according to claim 1, characterized in that: The stress dispersion and stabilization structure (7) comprises a side spacer plate (9), an anchor rod mounting hole (10), a threaded joint (11), a threaded rod (12), a nut (13), and a stress sharing block (14). The left and right side spacer plates (9) are respectively provided with an anchor rod mounting hole (10) in the middle part, and the anchor rod support structure (8) is anchored to the sidewall of the chamber through the anchor rod mounting hole (10). The threaded joint (11) is respectively fixed on the inner side end of the side spacer plate (9) in front and back. The front and rear threaded rods (12) are respectively threadedly connected to the threaded joint (11). The nut (13) is installed on the threaded rod (12) through the inner side of the threaded joint (11). The stress sharing block (14) is connected to the outer end of the threaded rod (12), and the stress sharing block (14) corresponds to the support groove (6).
3. The large-span chamber reinforced support structure of a coal mine according to claim 2, characterized in that: The anchor rod support structure (8) stably supports the upper arched support plate (3) and the lower arched support plate (5) through the stress dispersion and stabilization structure (7).