Rock burst supporting mechanism for TBM tunneling

Abstract

The utility model discloses a rock burst supporting mechanism for TBM tunneling, relates to the technical field of TBM construction, and can solve the problem that an existing supporting structure may have a breakdown phenomenon in the protection process. The rock burst supporting mechanism for TBM tunneling comprises an arc-shaped base plate, a plurality of protection tiles arranged on the outer convex face of the arc-shaped base plate and an energy discharging assembly arranged between the protection tiles and the arc-shaped base plate.

Description

Technical Field

[0001] This utility model relates to the field of TBM construction technology, specifically to a rockburst support mechanism for TBM tunneling. Background Technology

[0002] TBM stands for Tunnel Boring Machine, a large-scale engineering machine used for tunnel construction. It is widely used in the construction of highway and railway tunnels both domestically and internationally, and has advantages such as fast tunneling speed, environmental friendliness, and high overall efficiency.

[0003] However, during TBM construction, because it relies on applying pressure to the rock face to break it, excessive rock stress occurs in areas near the construction section, leading to rockbursts that can damage equipment or even injure people, thus affecting construction progress. Currently, the main protective measure is to install temporary support structures in high-risk rockburst areas between the tunnel face and the support section. However, the effectiveness of existing support structures relies solely on material strength; even slightly intense rockbursts can cause penetration, necessitating urgent improvements.

[0004] Based on the above background, a rockburst support mechanism for TBM tunneling has been designed to solve at least one of the above problems, and therefore, this application is hereby proposed. Summary of the Invention

[0005] The purpose of this application is to provide a rockburst support mechanism for TBM tunneling, which solves the problem that existing support structures may experience penetration during the protection process.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0007] This application provides a rockburst support mechanism for TBM tunneling, including an arc-shaped base plate and a plurality of protective tiles disposed on the outer convex surface of the arc-shaped base plate, and an energy dissipation component disposed between the protective tiles and the arc-shaped base plate.

[0008] Optionally, some of the protective tiles are arranged in a rectangular array.

[0009] Optionally, the energy dissipation assembly includes an energy dissipation base, two U-shaped rods, and an energy dissipation spring, wherein:

[0010] The energy-dissipating base is fixed on the arc-shaped base plate. The energy-dissipating base has a mounting through hole that runs through its two opposite sides. The bottom of the two U-shaped rods is located on both sides of the mounting through hole. The other end of the U-shaped rod is rotatably connected to the end face of the protective tile. The energy-dissipating spring is located in the mounting through hole, and the two ends of the energy-dissipating spring press against the bottom of the two U-shaped rods respectively.

[0011] Optionally, the energy dissipation assembly further includes two sliding baffles disposed in the mounting through holes, the sliding baffles being slidably connected to the mounting through holes;

[0012] The energy-relieving spring is located between two sliding stops, and the energy-relieving spring presses the two U-shaped rods against both sides of the mounting through hole through the two sliding stops.

[0013] Optionally, both ends of the sliding stop are provided with limiting ends with a size larger than the width of the mounting through hole.

[0014] Optionally, the cross-sectional shape of the mounting through hole is rectangular, and the longitudinal cross-sectional shape of the mounting through hole is elongated.

[0015] Optionally, the energy dissipation assembly includes an elastic air tube arranged axially along the arc of the arc-shaped substrate;

[0016] The protective tile is bonded and fixed to the elastic air tube, and the elastic air tube is bonded and fixed to the arc-shaped base plate.

[0017] Optionally, it also includes an air tube mounting seat fixed on the arc-shaped base plate, wherein the side of the air tube mounting seat facing away from the arc-shaped base plate is provided with an elongated groove with an arc-shaped cross section.

[0018] The elastic air tube is bonded and fixed in the long groove.

[0019] Optionally, the concave surfaces of the arc-shaped substrate are further provided with connection structures at both ends for mounting the arc-shaped substrate onto the main body of the tunneling machine.

[0020] Beneficial effects of the utility model:

[0021] I. This application provides a plurality of protective tiles on an arc-shaped substrate and an energy-dissipating component between the protective tiles and the arc-shaped substrate. This allows the rock ejected after a rockburst to be de-energized by the energy-dissipating component after hitting the protective tiles, preventing it from directly hitting the arc-shaped substrate and making hard contact with it, thus avoiding the arc-shaped substrate being punctured. This effectively solves the problem that existing support structures may be punctured during the protection process in the prior art.

[0022] Second, after the protective tile of this application is damaged by a major impact, the damaged protective tile can be replaced during regular maintenance, which can reduce the overall operating cost of the rockburst support mechanism and avoid the high operating cost caused by replacing the entire arc base plate after the arc base plate is damaged. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0024] Figure 2 This is a schematic diagram of the structure after the protective tile is installed on the energy dissipation component in Embodiment 1 of this application.

[0025] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0026] Explanation of reference numerals in the attached drawings: 1-arc-shaped base plate, 11-connection structure, 2-protective tile, 3-energy unloading component, 31-energy unloading base, 311-mounting through hole, 32-U-shaped rod, 33-energy unloading spring, 34-sliding stop bar, 4-tunneling machine body, 5-elastic air pipe, 6-air pipe mounting seat. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0028] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example 1:

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides a rockburst support mechanism for TBM tunneling, including an arc-shaped base plate 1 and a plurality of protective tiles 2 disposed on the outer convex surface of the arc-shaped base plate 1, and an energy dissipation component 3 disposed between the protective tiles 2 and the arc-shaped base plate 1.

[0033] This embodiment sets several protective tiles 2 on the arc-shaped substrate 1 and sets an energy-dissipating component 3 between the protective tiles 2 and the arc-shaped substrate 1. This allows the rock that is ejected after a rockburst to be de-energized by the energy-dissipating component 3 after hitting the protective tiles 2, instead of directly flying into the arc-shaped substrate 1 and making hard contact with it, which would cause the arc-shaped substrate 1 to be penetrated. This can effectively solve the problem that the existing support structure may be penetrated during the protection process in the prior art.

[0034] Furthermore, in this embodiment, after the protective tile 2 is damaged by a large impact, the damaged protective tile 2 can be replaced during regular maintenance, which can reduce the overall operating cost of the rockburst support mechanism and avoid the high operating cost caused by replacing the entire arc base plate 1 after it is damaged.

[0035] In this embodiment, the protective tiles 2 are arranged in a rectangular array, which minimizes the gaps between the protective tiles 2 and prevents large flying rocks from directly impacting the arc-shaped substrate 1.

[0036] In this embodiment, the energy dissipation assembly 3 includes an energy dissipation base 31, two U-shaped rods 32, and an energy dissipation spring 33, wherein:

[0037] The energy-dissipating base 31 is fixed on the arc-shaped base plate 1. The energy-dissipating base 31 has a mounting through hole 311 that runs through its two opposite sides. The bottoms of the two U-shaped rods 32 are located on both sides of the mounting through hole 311. The other end of the U-shaped rods 32 is rotatably connected to the end face of the protective tile 2. The energy-dissipating spring 33 is located in the mounting through hole 311, and the two ends of the energy-dissipating spring 33 press against the bottom of the two U-shaped rods 32 respectively.

[0038] In this embodiment, after the rock flies out and impacts the protective tile 2, the protective tile 2 will move towards the arc-shaped base plate 1, causing the U-shaped rod 32 to compress the energy-releasing spring 33, so that part of the rock's kinetic energy is converted into elastic potential energy. After the energy-releasing action is completed, the energy-releasing spring 33 can be reset, pressing the protective tile 2 back to the preset position for protection.

[0039] In this embodiment, the energy dissipation component 3 further includes two sliding baffles 34 disposed in the mounting through hole 311, and the sliding baffles 34 are slidably connected to the mounting through hole 311;

[0040] The energy-relieving spring 33 is positioned between two sliding stops 34, and the energy-relieving spring 33 presses the two U-shaped rods 32 against both sides of the mounting through hole 311 via the two sliding stops 34. By setting the sliding stops 34, multiple return springs can be set between the two sliding stops 34. At the same time, the elastic pressure of the energy-relieving spring 33 is more stable when pressing the U-shaped rods 32, avoiding problems such as the bottom of the U-shaped rods 32 rotating and getting stuck at the end of the energy-relieving spring 33 after being squeezed.

[0041] In this embodiment, both ends of the sliding stop bar 34 are provided with limiting ends with a size larger than the width of the mounting through hole 311 to ensure the stability of the sliding stop bar 34 and prevent the sliding stop bar 34 from sliding out of the mounting through hole 311.

[0042] In this embodiment, the cross-sectional shape of the mounting through hole 311 is rectangular, and the longitudinal cross-sectional shape of the mounting through hole 311 is elongated.

[0043] In this embodiment, the two ends of the concave surface of the arc-shaped substrate 1 are also provided with a connecting structure 11 for mounting the arc-shaped substrate 1 onto the tunneling machine body 4, which facilitates the installation and disassembly of the arc-shaped substrate 1, and allows for regular cleaning of gravel and replacement of damaged protective tiles 2.

[0044] Example 2:

[0045] like Figure 3 As shown, in this embodiment, the energy dissipation component 3 includes an elastic air pipe 5 arranged along the axial direction of the arc of the arc-shaped substrate 1.

[0046] The protective tile 2 is bonded and fixed to the elastic air tube 5, and the elastic air tube 5 is bonded and fixed to the arc-shaped base plate 1. The provision of the elastic air tube 5 makes the energy dissipation structure of this embodiment simpler and easier to manufacture and maintain.

[0047] In this embodiment, a duct mounting seat 6 fixed on the arc-shaped substrate 1 is also included. The duct mounting seat 6 has an elongated groove with an arc-shaped cross section on the side away from the arc-shaped substrate 1.

[0048] The elastic air tube 5 is bonded and fixed in the elongated groove, and an air tube mounting seat 6 is provided to facilitate the accurate positioning and installation of the elastic air tube 5.

[0049] The remaining structures in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0050] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A rockburst support mechanism for TBM tunneling, characterized in that, It includes an arc-shaped substrate (1) and a number of protective tiles (2) disposed on the outer convex surface of the arc-shaped substrate (1), and an energy dissipation assembly (3) disposed between the protective tiles (2) and the arc-shaped substrate (1).

2. The rockburst support mechanism for TBM tunneling according to claim 1, characterized in that, Several of the protective tiles (2) are arranged in a rectangular array.

3. The rockburst support mechanism for TBM excavation according to claim 1, characterized in that, The energy dissipation assembly (3) includes an energy dissipation base (31), two U-shaped rods (32), and an energy dissipation spring (33), wherein: The energy dissipation base (31) is fixed on the arc-shaped base plate (1). The energy dissipation base (31) has a mounting through hole (311) that runs through its two opposite sides. The bottom of the two U-shaped rods (32) is located on both sides of the mounting through hole (311). The other end of the U-shaped rod (32) is rotatably connected to the end face of the protective tile (2). The energy dissipation spring (33) is located in the mounting through hole (311), and the two ends of the energy dissipation spring (33) press against the bottom of the two U-shaped rods (32) respectively.

4. The rockburst support mechanism for TBM excavation according to claim 3, characterized in that, The energy dissipation assembly (3) also includes two sliding baffles (34) disposed in the mounting through hole (311), the sliding baffles (34) being slidably connected to the mounting through hole (311); The energy-relieving spring (33) is located between two sliding stops (34), and the energy-relieving spring (33) presses the two U-shaped rods (32) against both sides of the mounting through hole (311) through the two sliding stops (34).

5. The rockburst support mechanism for TBM excavation according to claim 4, characterized in that, Both ends of the sliding stop (34) are provided with limiting ends with a size larger than the width of the mounting through hole (311).

6. The rockburst support mechanism for TBM excavation according to claim 3, characterized in that, The mounting through hole (311) has a rectangular cross-sectional shape and a long strip shape in its longitudinal section.

7. A rockburst support mechanism for TBM tunneling according to claim 1, characterized in that, The energy dissipation assembly (3) includes an elastic air tube (5) arranged along the axial direction of the arc of the arc-shaped substrate (1); The protective tile (2) is bonded and fixed to the elastic air tube (5), and the elastic air tube (5) is bonded and fixed to the arc-shaped base plate (1).

8. The rockburst support mechanism for TBM excavation according to claim 7, characterized in that, It also includes a trachea mounting seat (6) fixed on the arc-shaped base plate (1), and the trachea mounting seat (6) has an arc-shaped groove on the side away from the arc-shaped base plate (1). The elastic air tube (5) is bonded and fixed in the long groove.

9. The rockburst support mechanism for TBM excavation according to claim 1, characterized in that, The concave surfaces of the arc-shaped substrate (1) are also provided with connection structures (11) for mounting the arc-shaped substrate (1) onto the tunneling machine body (4).

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