A wedge-shaped masonry energy-absorbing support device for circular roadway

Abstract

The present application relates to the technical field of coal mine safety, and relates to a wedge-shaped masonry type circular roadway energy absorption supporting device, which comprises an outer ring supporting structure and an inner ring energy absorption structure. The outer ring supporting structure is a closed structure composed of multiple rigid box type housings hinged together, and the inner ring energy absorption structure is a closed structure composed of multiple energy absorption box type structures hinged together. The rigid box type housings and the energy absorption box type structures are arranged alternately. Under the action of certain external force or external energy, the outer ring supporting structure can displace to a certain extent, so that the inner ring energy absorption structure can produce an energy absorption effect. When instantaneous impact ground pressure occurs, if the pressure borne by the energy absorption box type structure exceeds its threshold value, the energy absorption box type structure will immediately deform rapidly to absorb energy, release the overload pressure, consume the shock wave energy, relieve the impact effect on the rigid circular supporting structure of the outer ring, and protect the support from impact damage. When the energy absorption of the energy absorption box type structure reaches the peak, the present application will generate greater supporting force, avoiding the direct collapse of the roadway.

Description

Technical Field

[0001] This invention relates to the field of coal mine safety technology, and more specifically, to a wedge-shaped masonry type circular roadway energy-absorbing support device. Background Technology

[0002] With the increasing depth and expansion of coal mining areas, the frequency and severity of rockburst accidents are becoming increasingly prominent. When a rockburst occurs, the sudden deformation and failure of the surrounding rock in the roadway will have a violent impact on the roadway support, causing damage or even collapse of the support. At the same time, the roadway may also experience sidewall spalling, roof fall, and collapse, and may also cause mechanical equipment to overturn and be damaged, thus leading to roadway blockage.

[0003] Because of the significant hazards posed by rockburst accidents, coal mines have conducted extensive and in-depth research and control measures against them. Analysis has revealed that the instability and failure of the support system are primarily due not to insufficient strength, but rather to the poor impact resistance of the support structure and its lack of effective buffering and energy absorption capabilities. Currently, coal mines in my country have generally entered the deep mining stage, facing increasingly powerful mine pressures and more complex geological conditions that place higher demands on support systems. Therefore, there is an urgent need to develop more rational support methods, design superior support equipment, and improve the current state of rockburst prevention support in coal mines to ensure the personal safety of coal miners and the smooth progress of mining operations. Summary of the Invention

[0004] The present invention provides a wedge-shaped masonry type circular tunnel energy-absorbing support device, which can overcome some or all of the defects of the prior art.

[0005] According to the present invention, a wedge-shaped masonry type circular tunnel energy-absorbing support device includes an outer ring support structure and an inner ring energy-absorbing structure. The outer ring support structure is a closed structure formed by hinged multiple rigid box-type shells, and the inner ring energy-absorbing structure is a closed structure formed by hinged multiple energy-absorbing box-type structures. The outer ring support structure and the inner ring energy-absorbing structure are concentric and closely fitted to form an annular support body, and the rigid box-type shells and energy-absorbing box-type structures are alternately arranged.

[0006] Preferably, both the rigid box-type shell and the energy-absorbing box structure are wedge-shaped structures, with the wedge shape of the rigid box-type shell facing inward and the wedge shape of the energy-absorbing box structure facing outward.

[0007] Preferably, the arc end of the rigid box-type housing is provided with a clearance hole and a small round hole, and adjacent rigid box-type housings are connected by a hinge shaft, which is located inside the small round hole.

[0008] Preferably, the clearance hole has a groove-shaped structure, and the width of the middle section is smaller than the diameter of the arc segment.

[0009] Preferably, the bottom edge of the energy-absorbing box structure is provided with a connecting lug, and adjacent energy-absorbing box structures are hinged together by a hinge shaft and a connecting lug.

[0010] Preferably, the rigid box-type shell has the same apex angle as the energy-absorbing box-type structure.

[0011] Preferably, the energy-absorbing box structure is made of a thin-walled metal tube filled with porous foam alloy.

[0012] Preferably, the energy-absorbing box structure is a pre-textured thin-walled metal box filled with porous foam alloy.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] 1. The rigid box-type shell and the energy-absorbing box-type structure are alternately set. Under the action of a certain external force or external energy, the outer ring support structure can undergo a certain displacement so that the inner ring energy-absorbing structure can produce an energy absorption effect.

[0015] 2. The clearance hole is a groove-shaped structure, and the width of the middle section is smaller than the diameter of the arc section, which allows the outer ring support structure to undergo a certain relative slip at the hinge, thus compressing the energy-absorbing box structure.

[0016] 3. When a rockburst occurs, the outer rigid box shell, after bearing pressure exceeding its threshold, tends to be squeezed and deformed through the clearance holes. When the internal energy-absorbing box structure, after bearing pressure exceeding its threshold, immediately undergoes rapid deformation to make way and absorb energy, releasing overload pressure, consuming shock wave energy, mitigating the impact on the outer rigid circular support structure, and protecting the support from impact damage. When the energy-absorbing box structure reaches its peak energy absorption, this invention will generate greater support force, preventing the roadway from being directly crushed and leaving no escape route. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the energy-absorbing box structure of the present invention;

[0019] Figure 3 This is a structural schematic diagram of the rigid box-type housing of the present invention.

[0020] in:

[0021] 1. Rigid box-type shell; 3. Energy-absorbing box structure; 6. Connecting column; 7. Leaving hole; 8. Small round hole. Detailed Implementation

[0022] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0023] Example 1

[0024] like Figures 1-3 As shown, a wedge-shaped masonry type circular tunnel energy-absorbing support device includes an outer ring support structure and an inner ring energy-absorbing structure. The outer ring support structure is a closed structure formed by hinged multiple rigid box-type shells 1, and the inner ring energy-absorbing structure is a closed structure formed by hinged multiple energy-absorbing box-type structures 3. The outer ring support structure and the inner ring energy-absorbing structure are concentric and closely fitted to form an annular support body. The rigid box-type shells 1 and the energy-absorbing box-type structures 3 are alternately arranged. Under the action of a certain external force or external energy, the outer ring support structure can undergo a certain displacement so that the inner ring energy-absorbing structure can produce an energy-absorbing effect.

[0025] Both the rigid box-type shell 1 and the energy-absorbing box-type structure 3 are wedge-shaped structures. The wedge shape of the rigid box-type shell 1 faces inward, while the wedge shape of the energy-absorbing box-type structure 3 faces outward.

[0026] The arc end of the rigid box-type housing 1 is provided with a clearance hole 7 and a small round hole 8. Adjacent rigid box-type housings 1 are connected by a hinge shaft. The hinge shaft is located in the small round hole 8. After the hinge shaft passes through the small round hole 8 of the previous rigid box-type housing 1, it is connected to the clearance hole 7 of the next rigid box-type housing 1.

[0027] The clearance hole 7 is a groove-shaped structure, and the width of the middle section is smaller than the diameter of the arc section, which allows the outer ring support structure to undergo a certain relative slip at the hinge, thus compressing the energy-absorbing box structure 3.

[0028] The bottom edge of the energy-absorbing box structure 3 is provided with a connecting ear 6. Adjacent energy-absorbing box structures 3 are hinged together by a hinge shaft and a connecting ear 6. After the hinge shaft passes through the previous energy-absorbing box structure 3, it connects with the connecting ear 6 of the next energy-absorbing box structure 3.

[0029] The rigid box-type shell 1 and the energy-absorbing box-type structure 3 have the same apex angle.

[0030] The energy-absorbing box structure 3 is a pre-textured thin-walled metal box filled with porous foam alloy.

[0031] The following describes a single use of the present invention with reference to the accompanying drawings:

[0032] When the energy-absorbing support device of the present invention is used in the roadway, under normal circumstances where there is no rock burst, the pressure of the surrounding rock of the roadway squeezes the closed frame. The pressure will be transmitted to the energy-absorbing box structure 3 through the rigid box structure that makes up the closed frame, and the quasi-static surrounding rock pressure will be borne by the ring support composed of the rigid box shell 1 and the energy-absorbing box structure 3.

[0033] When a rockburst occurs, the outer rigid box shell 1 experiences pressure exceeding its threshold, causing it to deform through the clearance hole 7. When the internal energy-absorbing box structure 3 experiences pressure exceeding its threshold, it immediately deforms rapidly to absorb energy, release overload pressure, dissipate shock wave energy, alleviate the impact on the outer rigid circular support structure, and protect the support from impact damage. When the energy-absorbing box structure 3 reaches its peak energy absorption, the invention will generate greater support force, preventing the roadway from being directly crushed and leaving no escape route.

[0034] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wedge-shaped masonry type circular roadway energy-absorbing support device, characterized in that: It includes an outer ring support structure and an inner ring energy-absorbing structure. The outer ring support structure is a closed structure composed of multiple rigid box shells (1) hinged together. The inner ring energy-absorbing structure is a closed structure composed of multiple energy-absorbing box structures (3) hinged together. The outer ring support structure and the inner ring energy-absorbing structure are concentric and closely fitted to form an annular support body. The rigid box shells (1) and the energy-absorbing box structures (3) are alternately arranged. Under the action of external force, the outer ring support structure can undergo a certain displacement so that the inner ring energy-absorbing structure can produce an energy-absorbing effect. Both the rigid box-type shell (1) and the energy-absorbing box-type structure (3) are wedge-shaped structures, with the wedge of the rigid box-type shell (1) facing inward and the wedge of the energy-absorbing box-type structure (3) facing outward.

2. The wedge-shaped masonry type circular roadway energy-absorbing support device according to claim 1, characterized in that: The arc end of the rigid box shell (1) is provided with a clearance hole (7) and a small round hole (8). Adjacent rigid box shells (1) are connected by a hinge shaft. The hinge shaft is located in the small round hole (8). After the hinge shaft passes through the small round hole (8) of the previous rigid box shell (1), it is connected to the clearance hole (7) of the next rigid box shell (1).

3. The wedge-shaped masonry type circular roadway energy-absorbing support device according to claim 2, characterized in that: The clearance hole (7) is a groove-shaped structure, and the width of the middle section is smaller than the diameter of the arc section, so that the outer ring support structure can slide relative to each other at the hinge, and can squeeze the energy-absorbing box structure (3).

4. The wedge-shaped masonry type circular roadway energy-absorbing support device according to claim 1, characterized in that: The bottom edge of the energy-absorbing box structure (3) is provided with a connecting ear (6). Adjacent energy-absorbing box structures (3) are hinged together by a hinge shaft and a connecting ear (6). After the hinge shaft passes through the previous energy-absorbing box structure (3), it is connected to the connecting ear (6) of the next energy-absorbing box structure (3).

5. The wedge-shaped masonry type circular roadway energy-absorbing support device according to claim 1, characterized in that: The rigid box-type shell (1) has the same apex angle as the energy-absorbing box-type structure (3).

6. The wedge-shaped masonry type circular roadway energy-absorbing support device according to any one of claims 1 to 5, characterized in that: The energy-absorbing box structure (3) is a pre-folded thin-walled metal box filled with porous foam alloy.

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