Retractable roadway surrounding rock supporting device

Abstract

The utility model discloses a retractable roadway surrounding rock supporting device which comprises an arched beam used for supporting a top roadway, U-shaped stand columns used for supporting the arched beam are arranged on the two sides of the arched beam, and retractable assemblies are arranged on the U-shaped stand columns. The retractable assembly can provide corresponding expansion and contraction amount according to the condition that the arch beam moves downwards due to the fact that a top rock stratum moves downwards after blasting pressure relief, the retractable assembly comprises a frame-shaped sliding frame and an L-shaped sliding frame which are provided with U-shaped stand columns and slidably connected in the U-shaped stand columns, a first rack is arranged on the inner side of the frame-shaped sliding frame, and a second rack is arranged on the inner side of the L-shaped sliding frame. Meshed transmission gears are arranged between the first rack and the second rack, and an extrusion spring is connected between the outer side of the bottom of the frame-shaped sliding frame and the inner side of the bottom of the L-shaped sliding frame. The telescopic assemblies are additionally arranged on the stand columns on the two sides of the arched beam, blasting impact and vibration are effectively buffered, deformation and damage of the stand columns are reduced, the service life of the supporting device is prolonged, roadway stability is enhanced, and safe and efficient mining is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tunnel support, specifically to a retractable tunnel surrounding rock support device. Background Technology

[0002] In mining operations, blasting for pressure relief is a common and important construction method. However, during the blasting process at the top of the tunnel, the strong shock waves and vibrations generated by the blasting can significantly affect the surrounding rock. This powerful impact and vibration energy can easily cause deformation or even cracking of the surrounding rock, which not only poses a serious threat to the safety of construction workers but also affects the normal progress of the project.

[0003] The existing roadway support devices are clearly inadequate in dealing with the impact and vibration generated by blasting. These support devices cannot effectively achieve the function of shock absorption and buffering. When there is overhead squeezing force or strong vibration, they are prone to deformation and damage. Due to their structural and performance limitations, the service life of the support devices is relatively short, making it difficult to maintain the stability of the roadway for a long time. This situation seriously restricts the safe and efficient operation of mining and brings huge challenges and risks to the smooth implementation of related projects. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a retractable roadway surrounding rock support device.

[0005] This utility model is achieved through the following technical solution:

[0006] A retractable roadway surrounding rock support device includes an arched beam for supporting the top roadway, U-shaped columns for supporting the arched beam on both sides, and a retractable component on the U-shaped columns. The retractable component can provide a corresponding amount of expansion and contraction according to the downward movement of the top rock layer after blasting and decompression, which causes the arched beam to move downward. The retractable component includes a frame-type slide and an L-shaped slide that are slidably connected inside the U-shaped columns. A first rack is provided on the inner side of the frame-type slide, and a second rack is provided on the inner side of the L-shaped slide. A transmission gear meshes between the first rack and the second rack. A compression spring is connected between the outer side of the bottom of the frame-type slide and the inner side of the bottom of the L-shaped slide.

[0007] Alternatively, a first sliding groove and a second sliding groove are respectively provided on both sides of the U-shaped column, and a frame-type slide and an L-shaped slide are slidably connected to the first sliding groove and the second sliding groove respectively.

[0008] Alternatively, the crossbar of the L-shaped carriage extends into the first groove and is slidably connected thereto.

[0009] Alternatively, the frame carriage and the L-shaped carriage can be interlocked.

[0010] Further, the U-shaped frame is fixedly connected to one side of the frame-shaped carriage and is sleeved and slidably connected with the vertical rod of the L-shaped carriage.

[0011] Further, the outer side of the bottom of the frame-shaped carriage and the inner side of the bottom of the L-shaped carriage are respectively provided with a limiting column.

[0012] Further, one end of the extrusion spring is fixedly connected to the outer side of the bottom of the frame-shaped carriage and the other end is fixedly connected to the inner side of the bottom of the L-shaped carriage, and the two ends of the extrusion spring are respectively sleeved on the limiting columns.

[0013] Further, a rotating shaft is arranged at the center of the transmission gear and is rotatably connected therewith, and the rotating shaft is fixedly connected with the U-shaped column.

[0014] Further, the two ends of the arch-shaped beam are respectively fixedly connected with the corresponding upper parts of the frame-shaped carriages.

[0015] Compared with the prior art, the utility model has the advantages that the utility model increases the collapsible assembly on the columns on both sides of the arch-shaped beam, effectively buffers the blasting impact and vibration, reduces the deformation damage of the columns, prolongs the service life of the supporting device, enhances the stability of the roadway, and ensures the safe and efficient mining of the mine. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 is Figure 1 a local enlarged schematic diagram;

[0018] Figure 3 is a schematic diagram of the collapsible assembly in the utility model;

[0019] In the figure: roadway 1, arch-shaped beam 2, U-shaped column 3, frame-shaped carriage 4, L-shaped carriage 5, first rack 6, second rack 7, transmission gear 8, extrusion spring 9, first sliding groove 10, second sliding groove 101, U-shaped frame 11, limiting column 12, rotating shaft 13. DETAILED DESCRIPTION

[0020] The utility model will be further described in detail in combination with the drawings and the specific implementation manner:

[0021] For example, Figure 1 , 2, 3 shows a collapsible roadway surrounding rock supporting device, which comprises an arch beam 2 for supporting the top roadway 1, U-shaped columns 3 provided on both sides of the arch beam 2 for supporting the arch beam 2, and a collapsible assembly provided on the U-shaped columns 3, which can provide a corresponding expansion amount according to the situation that the arch beam 2 moves downward due to the downward movement of the top rock stratum after blasting pressure relief. The collapsible assembly comprises a frame-shaped carriage 4 and an L-shaped carriage 5 which are slidingly connected inside the U-shaped columns 3, a first rack 6 provided on the inner side of the frame-shaped carriage 4, a second rack 7 provided on the inner side of the L-shaped carriage 5, and a transmission gear 8 provided between the first rack 6 and the second rack 7 and meshing with each other. An extrusion spring 9 is connected between the outer side of the bottom of the frame-shaped carriage 4 and the inner side of the bottom of the L-shaped carriage 5.

[0022] As shown in Figure 3 , first and second sliding grooves 10 and 101 are respectively provided on both sides of the U-shaped column 3, and the frame-shaped carriage 4 and the L-shaped carriage 5 are respectively slidingly connected to the first and second sliding grooves 10 and 101.

[0023] As shown in Figure 3 , the crossbar of the L-shaped carriage 5 extends into the first sliding groove 10 and is slidingly connected thereto, preventing the L-shaped carriage 5 from shaking when moving and ensuring that the L-shaped carriage 5 can move vertically up and down.

[0024] As shown in Figure 3 , the frame-shaped carriage 4 and the L-shaped carriage 5 are arranged in engagement.

[0025] As shown in Figure 2 , 3 , a U-shaped bracket 11 is connected and fixed to one side of the frame-shaped carriage 4, and the U-shaped bracket 11 is slidingly connected to the vertical rod of the L-shaped carriage 5 in a sleeved manner, preventing the frame-shaped carriage 4 from shaking when moving and ensuring that the frame-shaped carriage 4 can move vertically up and down.

[0026] As shown in Figure 3 , limit posts 12 are respectively provided on the outer side of the bottom of the frame-shaped carriage 4 and the inner side of the bottom of the L-shaped carriage 5.

[0027] As shown in Figure 3 , one end of the extrusion spring 9 is connected and fixed to the outer side of the bottom of the frame-shaped carriage 4, and the other end is connected and fixed to the inner side of the bottom of the L-shaped carriage 5, and the extrusion spring 9 is sleeved on the limit posts 12 at both ends.

[0028] As shown in Figure 1 , 2 , a shaft 13 is provided at the center of the transmission gear 8 and is rotatably connected thereto, and the shaft 13 is connected and fixed to the U-shaped column 3.

[0029] As shown in Figure 1 , 2 , both ends of the arch beam 2 are respectively connected and fixed to the upper parts of the corresponding frame-shaped carriages 4.

[0030] The implementation principle of the collapsible roadway surrounding rock supporting device according to an embodiment of the present application is as follows:

[0031] When the roadway 1 is subjected to blasting pressure relief of the roof stratum, the impact force and vibration generated by the blasting cause the stratum to break, move and deform and to be relieved of pressure. These changes cause the originally high-stress stratum to relax and then to move downward. The weight (or pressure) generated by the downward movement of the stratum gradually acts on the arch beam 2, causing the arch beam 2 to have a downward movement tendency.

[0032] When the arch beam 2 is subjected to extrusion and downward movement, the frame-shaped carriage 4 connected to the arch beam 2 moves downward along the first sliding groove 10. The first rack 6 connected to the frame-shaped carriage 4 moves downward along with the frame-shaped carriage 4. The downward movement of the first rack 6 drives the transmission gear 8 to rotate counterclockwise about the shaft. During the counterclockwise rotation of the transmission gear 8, the second rack 7 on the L-shaped carriage 5 moves upward. During this process, the distance between the bottom plate at the lower part of the frame-shaped carriage 4 and the horizontal plate of the L-shaped carriage 5 decreases. At the same time, the extrusion spring 9 between the bottom plate at the lower part of the frame-shaped carriage 4 and the bottom plate of the L-shaped carriage 5 generates a restoring force. The restoring force gradually increases as the distance between the bottom plate at the lower part of the frame-shaped carriage 4 and the horizontal plate of the L-shaped carriage 5 decreases.

[0033] When the pressure generated by the downward movement of the stratum and the restoring force of the extrusion spring 9 reach a balance, the frame-shaped carriage 4 stops moving downward, so that the arch beam 2 closely adheres to the roadway 1 and continues to play a supporting role. Since the frame-shaped carriage 4 and the L-shaped carriage 5 are in a mutual movement relationship, the downward movement of the L-shaped carriage 5 causes the frame-shaped carriage 4 to move upward. Therefore, the extrusion spring 9 respectively provides an upward pushing force to the frame-shaped carriage 4 and a downward pushing force to the L-shaped carriage 5. The upward and downward pushing forces indirectly ensure the supporting role of the arch beam 2. The structure uses the elastic buffering action of the extrusion spring 9 to effectively absorb the impact energy generated by the downward movement of the stratum, thereby protecting the stability of the roadway structure.

[0034] The above shows and describes the basic principle, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application. These changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A collapsible roadway surrounding rock support device, comprising an arch beam (2) for supporting a top roadway (1), characterized in that: The arch-shaped beam (2) is provided with U-shaped columns (3) on both sides for supporting the arch-shaped beam (2), the U-shaped columns (3) are provided with a collapsible assembly, the collapsible assembly can provide corresponding expansion amount according to the situation that the arch-shaped beam (2) moves down after the blasting pressure relief, the collapsible assembly comprises a frame-shaped carriage (4) and an L-shaped carriage (5) which are slidably connected inside the U-shaped column (3), the inside of the frame-shaped carriage (4) is provided with a first rack (6), the inside of the L-shaped carriage (5) is provided with a second rack (7), the first rack (6) and the second rack (7) are provided with transmission gears (8) which are engaged with each other, and the outside of the bottom of the frame-shaped carriage (4) and the inside of the bottom of the L-shaped carriage (5) are connected with extrusion springs (9).

2. A collapsible roadway surrounding rock support device according to claim 1, characterised in that: The U-shaped columns (3) are respectively provided with first sliding grooves (10) and second sliding grooves (101) on both sides, and the frame-shaped carriages (4) and the L-shaped carriages (5) are slidably connected with the first sliding grooves (10) and the second sliding grooves (101) correspondingly.

3. A collapsible roadway surrounding rock support device according to claim 2, characterised in that: The horizontal rod of the L-shaped carriage (5) extends into the first sliding groove (10) and is slidably connected therewith.

4. A collapsible roadway surrounding rock support device according to claim 3, characterised in that: The frame-shaped carriage (4) and the L-shaped carriage (5) are arranged in engagement.

5. A collapsible roadway surrounding rock support device according to claim 4, characterised in that: The U-shaped frame (11) is connected and fixed to one side of the frame-shaped carriage (4), and the U-shaped frame (11) is sleeved and slidably connected with the vertical rod of the L-shaped carriage (5).

6. A collapsible roadway surrounding rock support device according to claim 5, characterised in that: The outside of the bottom of the frame-shaped carriage (4) and the inside of the bottom of the L-shaped carriage (5) are respectively provided with limiting columns (12).

7. A collapsible roadway surrounding rock support device according to claim 1, characterized in that: One end of the extrusion spring (9) is connected and fixed to the outside of the bottom of the frame-shaped carriage (4), and the other end is connected and fixed to the inside of the bottom of the L-shaped carriage (5), and the extrusion spring (9) is sleeved on the limiting columns (12) at both ends.

8. A collapsible roadway surrounding rock support device according to claim 1, characterized in that: The transmission gear (8) is provided with a rotating shaft (13) at the center and is rotatably connected therewith, and the rotating shaft (13) is connected and fixed with the U-shaped column (3).

9. A collapsible roadway surrounding rock support device according to claim 1, characterized in that: The arch-shaped beam (2) is respectively connected and fixed with the corresponding frame-shaped carriages (4) at both ends.

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