A temporary support structure for coal seam excavation

Abstract

The utility model discloses a kind of temporary support structure for coal seam tunneling, it is related to coal seam tunneling supporting technical field. Including: airborne support device roof beam, multiple grid structures are arranged in airborne support device roof beam inside;Mobile support plate, mobile support plate is horizontally arranged in each grid structure inside;Hydraulic cylinder, hydraulic cylinder is arranged on mobile support plate, hydraulic cylinder telescopic end is set up upwards, and top support plate is arranged on the telescopic end of hydraulic cylinder;Support crossbeam, support crossbeam is arranged on the surface of two opposite sides in each grid structure inside, and the two support crossbeams in grid structure inside are used to support the two ends of mobile support plate to be corresponded with.This utility model sets up movable mobile support plate on airborne support device roof beam, and top support plate is lifted by hydraulic cylinder control, to effectively support in roof fluctuation section empty roof position, reduce empty roof area, improve the security of coal seam tunneling temporary support.

Description

Technical Field

[0001] This utility model relates to the field of coal seam tunneling support technology, and in particular to a temporary support structure for coal seam tunneling. Background Technology

[0002] Coal seam tunneling, also known as coal roadway excavation, is an underground operation that involves excavating roadways within a coal seam for transportation, ventilation, and other functions in coal mining. The coal seam must comprise at least 4 / 5 of the cross-section. Construction must address safety risks such as gas outbursts, coal dust explosions, and roof pressure. Mechanized tunneling combined with temporary support techniques is commonly used. Temporary support in mechanized tunneling, also known as machine-mounted advance support, is temporary support equipment installed on the tunneling machine. It is used to quickly support newly exposed unsupported areas after tunneling operations, ensuring operational safety and improving efficiency. It provides support by directly contacting the roof through the roof support beams of the machine-mounted support device.

[0003] In existing technologies, while airborne pre-support can meet basic requirements in conventional sections, it is prone to problems with incomplete roof connection at undulating sections. In sections with roof undulations (height difference ±200mm), gaps of 100-150mm are easily observed, requiring manual installation of wooden wedges and increasing the time spent in the gap (approximately 10 minutes per cycle). Simultaneously, roof delamination monitoring data shows that the roof settlement in conventional sections reaches 30-50mm, approaching the warning value specified in the regulations, and frequent wedge installation increases labor intensity. The roof support beams of airborne support are of fixed length and are generally horizontal rectangular frame structures, unable to adapt to changes in roof height, thus leading to localized gaps and posing significant safety risks.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a temporary support structure for coal seam tunneling. Utility Model Content

[0005] The purpose of this invention is to provide a temporary support structure for coal seam tunneling that reduces the area of ​​open roofs in the roof support beams of the onboard support device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a temporary support structure for coal seam tunneling, comprising:

[0008] Airborne support device top beam, wherein multiple grid structures are provided on the inner side of the airborne support device top beam;

[0009] Movable support plates are horizontally arranged on the inner side of each of the grid structures;

[0010] A hydraulic cylinder is mounted on the movable support plate, with its telescopic end facing upwards and a top support plate mounted on its telescopic end.

[0011] Support beams are provided on opposite sides of the inner side of each of the grid structures. The two support beams on the inner side of the grid structure are used to support the two ends of the movable support plate. The two ends of the movable support plate slide on the two support beams.

[0012] And a position adjustment mechanism, which is disposed inside the grid structure to drive the movable support plate to move laterally to adjust the position of the movable support plate inside the grid structure.

[0013] Furthermore, the lower surface of the movable support plate is provided with cross ribs.

[0014] Furthermore, the hydraulic cylinder is located below the movable support plate and the telescopic end of the hydraulic cylinder is located above the movable support plate, and the top support plate is located above the movable support plate.

[0015] Furthermore, the position adjustment mechanism includes a movement guide mechanism that assists in guiding the movement direction of the movable support plate and a drive mechanism that drives the movable support plate to move.

[0016] Furthermore, the moving guide mechanism includes a horizontal guide tube horizontally disposed at one end of the lower surface of the moving support plate and a horizontal guide rod horizontally fixedly connected to the inner surface of the grid structure.

[0017] The horizontal guide tube extends along the horizontal movement direction of the movable support plate, and the horizontal guide rod passes through the horizontal guide tube and slides within the horizontal guide tube.

[0018] Furthermore, the driving mechanism includes an internally threaded pipe horizontally disposed at the other end of the lower surface of the movable support plate and a threaded rod horizontally disposed inside the grid structure. Both ends of the threaded rod are rotatably connected to the inner surface of the grid structure through bearings. The threaded rod passes through the internally threaded pipe and is threadedly engaged with the internally threaded pipe.

[0019] And a drive motor, which is fixed on the inner surface of the grid structure, and the rotating end of the drive motor is connected to the threaded rod to drive the threaded rod to rotate.

[0020] This utility model has the following beneficial effects.

[0021] The present invention relates to a mobile support device with a movable support plate installed on the top support beam. The top support plate is raised and lowered by a hydraulic cylinder to effectively support the unsupported area in the undulating section of the roof, thereby reducing the unsupported area and improving the safety of temporary support during coal seam tunneling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 A schematic diagram of a temporary support structure for coal seam tunneling provided for an embodiment of this utility model;

[0024] Figure 2 A top view of the roof support beam of an airborne support device for a temporary support structure used in coal seam tunneling, provided as an embodiment of this utility model;

[0025] Figure 3 A bottom view of a movable support plate for a temporary support structure used in coal seam excavation, provided as an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Airborne support device top beam; 2. Grid structure; 3. Movable support plate; 4. Hydraulic cylinder; 5. Top support plate; 6. Support beam; 7. Cross rib plate; 8. Horizontal guide pipe; 9. Horizontal guide rod. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, a further detailed description of this utility model will be provided below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] See Figures 1 to 3 As shown;

[0030] This embodiment discloses a temporary support structure for coal seam tunneling, comprising:

[0031] The airborne support device roof support beam 1 is a conventional roof support structure used to directly support the roof. We have improved the inner structure of the airborne support device roof support beam 1. The traditional grid structure on the inner side of the airborne support device roof support beam 1 is to ensure the overall structural stability and to stably support the roof. However, this airborne support device roof support beam 1 is equipped with multiple grid structures 2. Each grid structure 2 needs to be equipped with an adjustable structure to support the roadway roof. This allows the supporting structure to move to support uneven parts of the roadway through its own movement. This avoids the situation where the horizontal mechanism of the traditional airborne support device roof support beam 1 cannot reach the uneven roof and will result in an empty roof. In addition, the multiple grid structures 2 can also improve the overall support strength of the airborne support device roof support beam 1 and prevent deformation.

[0032] Movable support plate 3, with a horizontally installed movable support plate 3 on the inner side of each grid structure 2;

[0033] Hydraulic cylinder 4 is mounted on the movable support plate 3, with the telescopic end of hydraulic cylinder 4 facing upwards, and a top support plate 5 is mounted on the telescopic end of hydraulic cylinder 4.

[0034] Support beams 6 are provided on the two opposite sides of the inner side of each grid structure 2. The two support beams 6 on the inner side of the grid structure 2 are used to support the two ends of the movable support plate 3. The two ends of the movable support plate 3 slide on the two support beams 6.

[0035] And a position adjustment mechanism, which is set inside the grid structure 2 to drive the movable support plate 3 to move laterally to adjust the position of the movable support plate 3 inside the grid structure 2.

[0036] Specifically, during operation, the airborne support device's top beam 1 is driven by its own functional structure to a position close to the top plate, ready to provide support. Then, by observing the site conditions, the upward-protruding area is located. The position adjustment mechanism within the corresponding grid structure 2 drives the movable support plate 3 to move laterally, adjusting its position within the grid structure 2. This, in turn, adjusts the positions of the hydraulic cylinder 4 and the top support plate 5, allowing the hydraulic cylinder 4 to drive the top support plate 5 upward to support the upward-protruding area on the top plate. This structure overcomes the problem of traditional airborne support devices with horizontal flat structures where the top beam cannot reach the top plate of undulating structures, avoiding the problem of excessively large unsupported areas.

[0037] Furthermore, a cross rib plate 7 is provided on the lower surface of the movable support plate 3. The cross rib plate 7 strengthens the support strength of the movable support plate 3 for the hydraulic cylinder 4 and the top support plate 5, making the structure more stable.

[0038] Furthermore, the hydraulic cylinder 4 is positioned below the movable support plate 3, and the telescopic end of the hydraulic cylinder 4 is positioned above the movable support plate 3. The top support plate 5 is located above the movable support plate 3. With this structural distribution, the space is utilized more rationally within the limited thickness of the airborne support device's top beam 1. The hydraulic cylinder 4 and the top support plate 5 are installed so that the hydraulic cylinder 4 and the top support plate 5 have sufficient telescopic range after installation to support the top plate.

[0039] Furthermore, the position adjustment mechanism includes a movement guide mechanism that assists in guiding the movement direction of the moving support plate 3 and a drive mechanism that drives the moving support plate 3 to move. The movement guide mechanism is used to guide the moving support plate 3 to move stably along the movement direction.

[0040] Furthermore, the moving guide mechanism includes a horizontal guide tube 8 horizontally disposed at one end of the lower surface of the moving support plate 3 and a horizontal guide rod 9 horizontally fixedly connected to the inner surface of the grid structure 2;

[0041] The horizontal guide tube 8 extends along the horizontal movement direction of the movable support plate 3, and the horizontal guide rod 9 passes through the horizontal guide tube 8 and slides within the horizontal guide tube 8.

[0042] Specifically, the support for the movable support plate 3 is provided by the support beams 6 at both ends. During the movement of the movable support plate 3, the horizontal guide rod 9 slides inside the horizontal guide tube 8 to guide the movement direction of the movable support plate 3. During the movement, the movable support plate 3 slides on the support beams 6. When the movable support plate 3 is under pressure, the support beams 6 are the main stress-bearing positions. The longitudinal movement of the movable support plate 3 is very small, and the horizontal guide tube 8 and the horizontal guide rod 9 can fully withstand this small deformation.

[0043] Furthermore, the drive mechanism includes an internally threaded pipe 10 horizontally disposed at the other end of the lower surface of the movable support plate 3 and a threaded rod 11 horizontally disposed inside the grid structure 2. Both ends of the threaded rod 11 are rotatably connected to the inner surface of the grid structure 2 through bearings. The threaded rod 11 passes through the internally threaded pipe 10 and is threadedly engaged with the internally threaded pipe 10.

[0044] And a drive motor 12, which is fixed on the inner surface of the grid structure 2. The rotating end of the drive motor 12 is connected to the threaded rod 11 to drive the threaded rod 11 to rotate.

[0045] Specifically, under the rotatable support of the bearing, the threaded rod 11 is driven to rotate by the drive motor 12. Then, by utilizing the threaded engagement between the threaded rod 11 and the internal threaded pipe fitting 10, and when the internal threaded pipe fitting 10 cannot rotate, the internal threaded pipe fitting 10 drives the movable support plate 3 to move, which in turn drives the hydraulic cylinder 4 and the top support plate 5 to move.

[0046] In another embodiment, the top support plate 5 can be configured to be connected to the telescopic end of the hydraulic cylinder 4 by a threaded connection or other detachable connection such as a bolted connection, so that the top support plate 5 can be replaced with a more suitable shape and area according to specific circumstances, such as the size of the support area, so as to maximize the support area of ​​the top plate.

[0047] In the above technical solution, the temporary support structure for coal seam tunneling provided by this utility model has the following beneficial effects:

[0048] The present invention relates to a mobile support device with a movable support plate installed on the top support beam. The top support plate is raised and lowered by a hydraulic cylinder to effectively support the unsupported area in the undulating section of the roof, thereby reducing the unsupported area and improving the safety of temporary support during coal seam tunneling.

[0049] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A temporary support structure for coal seam tunneling, characterized in that, include: Airborne support device top beam (1), and multiple grid structures (2) are provided on the inner side of the airborne support device top beam (1); The movable support plate (3) is horizontally arranged on the inner side of each of the grid structures (2); Hydraulic cylinder (4), the hydraulic cylinder (4) is mounted on the movable support plate (3), the extension end of the hydraulic cylinder (4) is facing upward, and a top support plate (5) is mounted on the extension end of the hydraulic cylinder (4). Support beams (6) are provided on the two opposing inner surfaces of each grid structure (2). The two support beams (6) on the inner side of the grid structure (2) are used to support the two ends of the movable support plate (3). The two ends of the movable support plate (3) slide on the two support beams (6). And a position adjustment mechanism, which is disposed inside the grid structure (2) to drive the movable support plate (3) to move laterally to adjust the position of the movable support plate (3) inside the grid structure (2).

2. The temporary support structure for coal seam tunneling according to claim 1, characterized in that, The lower surface of the movable support plate (3) is provided with cross ribs (7).

3. A temporary support structure for coal seam tunneling according to claim 1, characterized in that, The hydraulic cylinder (4) is located below the movable support plate (3) and the telescopic end of the hydraulic cylinder (4) is located above the movable support plate (3). The top support plate (5) is located above the movable support plate (3).

4. A temporary support structure for coal seam tunneling according to claim 1, characterized in that, The position adjustment mechanism includes a movement guide mechanism that assists in guiding the movement direction of the movable support plate (3) and a drive mechanism that drives the movable support plate (3) to move.

5. A temporary support structure for coal seam tunneling according to claim 4, characterized in that, The moving guide mechanism includes a horizontal guide tube (8) horizontally disposed at one end of the lower surface of the moving support plate (3) and a horizontal guide rod (9) horizontally fixedly connected to the inner surface of the grid structure (2). The horizontal guide tube (8) extends along the horizontal movement direction of the movable support plate (3), and the horizontal guide rod (9) passes through the horizontal guide tube (8) and slides within the horizontal guide tube (8).

6. A temporary support structure for coal seam tunneling according to claim 5, characterized in that, The driving mechanism includes an internally threaded pipe (10) horizontally disposed at the other end of the lower surface of the movable support plate (3) and a threaded rod (11) horizontally disposed inside the grid structure (2). Both ends of the threaded rod (11) are rotatably connected to the inner surface of the grid structure (2) through bearings. The threaded rod (11) passes through the internally threaded pipe (10) and is threadedly engaged with the internally threaded pipe (10). And a drive motor (12), which is fixed on the inner surface of the grid structure (2), and the rotating end of the drive motor (12) is connected to the threaded rod (11) to drive the threaded rod (11) to rotate.

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