Roadway roof anchor rod self-adaptive protection device

Abstract

The utility model relates to a kind of roadway top anchor rod self-adapting protection devices;The roadway top anchor rod self-adapting protection device is set between the anchor rod of the top of hydraulic support and roadway top;Including soft box body and graded gravel;The soft box body includes bottom plate and soft side wall, side wall is vertically connected in the edge of bottom plate, side wall is connected head to tail;The top of soft box body is open, and graded gravel is contained in soft box body.In the utility model, the roadway top anchor rod self-adapting protection device is set between the anchor rod of the top of hydraulic support and roadway top, can contact the graded gravel inside anchor rod and box body, the deformation of soft side wall is connected with anchor rod, device is set in the top of hydraulic device, so not only guarantee the load-carrying capacity of hydraulic support to roadway top is not lost, also protect the anchor rod of roadway top not to be damaged by hydraulic support.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel supports, and in particular to an adaptive protection device for tunnel top anchor bolts. Background Technology

[0002] When excavating a coal mine, roadways are typically dug within the mining area. These roadways are usually located within rock strata or coal seams near the mine. Because the rock strata are brittle, anchor bolts are installed around the roadways to reinforce them and provide support, preventing deformation or collapse. Existing support methods include timber supports, steel supports, and telescopic supports. Currently, hydraulic telescopic supports are more commonly used to support roadways.

[0003] When hydraulic supports are used for load-bearing support in mine roadways, the upper steel plate of the hydraulic support is often placed directly in contact with the roadway ceiling. If anchor bolts are already fixed to the roadway ceiling, in order to ensure the hydraulic support's load-bearing capacity, the top of the hydraulic support is often directly and rigidly in contact with the exposed portion of the anchor bolts. This exerts significant pressure on the anchor bolts at the roadway ceiling, easily leading to deformation and damage.

[0004] Therefore, a protective device is needed to prevent the hydraulic support from making hard contact with the anchor bolt. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems and provide an adaptive protection device for roadway top anchor bolts.

[0006] The technical solution of this utility model is: an adaptive protection device for anchor bolts at the top of a roadway. This device is installed between the top of a hydraulic support and the anchor bolt at the top of the roadway. It includes a soft box and graded gravel. The soft box includes a base plate and soft sidewalls, with the sidewalls vertically connected to the edge of the base plate, end-to-end, forming a frame shape with the base plate. The top of the soft box is open, and the graded gravel is placed inside. This device, installed between the hydraulic support and the anchor bolt at the top of the roadway, allows the anchor bolt to contact the graded gravel inside the box. The soft sidewalls deform to connect with the anchor bolt. Because the device is located on top of the hydraulic support, it not only ensures that the hydraulic support does not lose its load-bearing capacity on the roadway top but also protects the anchor bolt from being damaged by the hydraulic support.

[0007] The soft sidewalls can autonomously adapt to the shape of the anchor bolt.

[0008] Preferably, the bottom of the flexible box body is fixedly provided with several wavy raised units; the wavy raised units are sheet-like, with a semi-circular top and a square bottom; the several wavy raised units are densely and interwoven on the bottom of the flexible box body. The interlacing of the tops of the several wavy raised units can increase the friction between the graded gravel and the bottom plate of the flexible box body, thereby increasing the support strength of the anchor bolts.

[0009] Furthermore, several rows of wavy raised units are arranged in an alternating pattern, with each row of wavy raised units touching each other; each row consists of several wavy raised units connected side by side. The tops of several wavy raised units combine to form an alternating wave shape, which can increase the friction between the graded gravel and the soft box bottom plate, so as to better withstand vertical forces.

[0010] Preferably, the top of the flexible box is provided with a reinforcing mesh, which is connected to the inner wall of the flexible box; the bottom of the reinforcing mesh is in contact with the graded gravel. The reinforcing mesh can pull the top of the flexible box, preventing deformation of the flexible box during support, which could lead to leakage of the graded gravel and affect the support effect of the device.

[0011] Furthermore, the reinforcing mesh comprises several interconnected mesh units; each mesh unit includes U-shaped ribs, with two U-shaped ribs arranged opposite each other and connected at both ends to form a mesh unit. Using several interconnected mesh units allows the reinforcing mesh to undergo a certain amount of tensile deformation, thereby providing a certain amount of deformation; moreover, it can pull the top of the flexible box body, preventing the flexible box body from collapsing.

[0012] Furthermore, the top of the graded gravel is provided with several elastic rubber strips evenly distributed, and the elastic rubber strips are laid along the length direction of the grid unit.

[0013] Furthermore, the reinforcing mesh is made of a soft material. When the reinforcing mesh, made of a soft material, provides support to the anchor bolts at the top of the roadway using graded gravel, it can deform autonomously according to the shape of the anchor bolts, thus preventing compression of the anchor bolts.

[0014] Preferably, the flexible box has a length of 4000mm, a width of 800mm, and a height of 150mm. This size of flexible box, combined with graded gravel, can work with hydraulic supports to provide excellent support for the anchor bolts.

[0015] The beneficial effects of this utility model are as follows: The adaptive protection device for the roadway top anchor bolt of this utility model has the following advantages:

[0016] 1. The soft box in this utility model has soft side walls, which can adapt to the shape deformation of the anchor rod, and the graded gravel filled in the soft box provides stable support for the anchor rod.

[0017] 2. This utility model uses gravel as filling material, which has the advantages of adapting to the shape of the anchor bolt, being easy to move, and having low material costs; and can evenly distribute the supporting force to the top of the tunnel, while enhancing the bearing capacity of the tunnel top. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the adaptive protection device for the roadway top anchor bolt of this utility model;

[0019] Figure 2 This is a top view of the adaptive protection device for roadway top anchor bolts of this utility model;

[0020] Figure 3 yes Figure 2 AA sectional stereoscopic view;

[0021] Figure 4 This is a front view of the adaptive protection device for roadway top anchor bolts of this utility model;

[0022] Figure 5 yes Figure 4 BB cross-sectional view;

[0023] Figure 6 yes Figure 4 CC section view.

[0024] In the diagram: 1. Soft box body, 11. Base plate, 12. Side wall, 2. Reinforcing mesh, 21. Mesh unit, 22. Rib, 3. Wave-shaped raised unit. Detailed Implementation

[0025] Example 1: See Figure 1-6 An adaptive protection device for roadway top anchor bolts is disclosed. This device is installed between the top of a hydraulic support and the anchor bolts at the top of the roadway. It includes a soft box 1 and graded gravel. The soft box 1 comprises a base plate 11 and soft sidewalls 12, with the sidewalls 12 vertically connected to the edge of the base plate 11, forming a frame shape. The top of the soft box 1 is open, and the graded gravel is placed inside. This device, installed between the hydraulic support and the anchor bolts at the top of the roadway, allows the anchor bolts to contact the graded gravel inside the device. The soft sidewalls 12 deform to connect with the anchor bolts. Because the device is positioned on top of the hydraulic support, it not only ensures that the hydraulic support's load-bearing capacity on the roadway top is not lost, but also protects the anchor bolts at the top of the roadway from damage caused by the hydraulic support.

[0026] The soft sidewall 12 can autonomously adapt to the shape of the anchor bolt to ensure stable support for the anchor bolt.

[0027] The top of the graded gravel is provided with several elastic rubber strips evenly distributed. The elastic rubber strips are laid along the length of the grid unit 21. The elastic rubber strips prevent the gravel from leaking out. At the same time, the anchor rod can be pressed in after contacting the elastic rubber strip, which plays a role in protecting the anchor rod.

[0028] The bottom of the flexible box 1 is fixedly provided with several wavy protruding units 3; the wavy protruding units 3 are sheet-like, with a semi-circular top and a square bottom; the several wavy protruding units 3 are densely distributed and staggered on the bottom of the flexible box 1. The staggered tops of the several wavy protruding units 3 can increase the friction between the graded gravel and the bottom plate 11 of the flexible box 1, thereby increasing the support strength of the anchor bolts.

[0029] The wave-shaped protruding units 3 are arranged in several rows, with each row of wave-shaped protruding units 3 attached to each other; each row consists of several wave-shaped protruding units 3 connected side by side. The tops of several wave-shaped protruding units 3 are combined to form an interlaced wave shape, which can increase the friction between the graded gravel and the bottom plate 11 of the soft box body 1, so as to better withstand the vertical force.

[0030] A reinforcing mesh 2 is provided on the top of the flexible box 1, and the reinforcing mesh 2 is connected to the inner side wall 12 of the flexible box 1; the bottom of the reinforcing mesh 2 is in conjunction with the graded gravel. The reinforcing mesh 2 can pull the top of the flexible box 1 to prevent the flexible box 1 from deforming during support, which would cause the graded gravel to leak and affect the support effect of the device.

[0031] The reinforcing mesh 2 includes several interconnected mesh units 21; each mesh unit 21 includes U-shaped ribs 22, with two U-shaped ribs 22 arranged opposite each other and connected at both ends to form a mesh unit 21. Using several interconnected mesh units 21 allows the reinforcing mesh 2 to undergo a certain amount of tensile deformation, thereby providing a certain amount of deformation; moreover, it can pull the top of the soft box 1 to prevent the soft box 1 from collapsing.

[0032] The reinforcing mesh 2 is made of soft material. When the graded gravel provides support for the anchor bolts at the top of the roadway, the reinforcing mesh 2 can deform autonomously according to the shape of the anchor bolts, thus avoiding compression of the anchor bolts.

[0033] The flexible housing 1 has a length of 4000mm, a width of 800mm, and a height of 150mm. This size of flexible housing 1, combined with graded gravel, can work with hydraulic supports to provide excellent support for the anchor bolts.

[0034] The working principle of this embodiment:

[0035] The roadway top anchor bolt adaptive protection device of this utility model supports the anchor bolts with graded gravel. The graded gravel can autonomously adapt to the shape of the anchor bolts during support, thereby ensuring the stability of the support. The side wall 12 of the soft box 1 is also made of soft material, which can wrap the anchor bolts during the support process, thereby avoiding leakage of graded gravel that could lead to unstable support. The reinforcing mesh 2 at the top of the soft box 1 pulls on the side wall 12 of the soft box 1, ensuring the structural stability of the device itself and enabling it to adapt to the anchor bolts.

[0036] Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the inner wall of the flexible box 1 is evenly provided with several strip grooves, which are parallel to the bottom surface of the flexible box 1. The graded gravel can fill the strip grooves, providing support for the part where the flexible box 1 is located and enhancing the overall support of the device.

Claims

1. A roadway top anchor bolt adaptive protection device, wherein the device is installed between the top of a hydraulic support and the anchor bolt at the top of the roadway; characterized in that, It includes a flexible box and graded gravel; the flexible box includes a base plate and flexible sidewalls, the sidewalls being vertically connected to the edge of the base plate, with the sidewalls joined end to end; the top of the flexible box is open, and the graded gravel is placed inside the flexible box.

2. The adaptive protection device for roadway top anchor bolts according to claim 1, characterized in that: The bottom of the flexible box is fixedly provided with several wavy raised units; the wavy raised units are sheet-shaped, with a semi-circular top and a square bottom; several wavy raised units are densely distributed on the bottom of the flexible box.

3. The adaptive protection device for roadway top anchor bolts according to claim 2, characterized in that: The wave-shaped raised units are arranged in several rows, with each row of wave-shaped raised units attached to each other; each row consists of several wave-shaped raised units connected side by side.

4. The adaptive protection device for roadway top anchor bolts according to claim 1, characterized in that: The top of the flexible box is provided with a reinforcing mesh, which is connected to the inner side wall of the flexible box; the bottom of the reinforcing mesh is matched with graded gravel.

5. The adaptive protection device for roadway top anchor bolts according to claim 4, characterized in that: The reinforcing mesh includes several interconnected mesh units; each mesh unit includes U-shaped ribs, with two U-shaped ribs arranged opposite each other and connected at both ends to form a mesh unit.

6. The adaptive protection device for roadway top anchor bolts according to claim 5, characterized in that: The top of the graded gravel is provided with several elastic rubber strips that are evenly distributed, and the elastic rubber strips are laid along the length of the grid unit.

7. The adaptive protection device for roadway top anchor bolts according to claim 4, characterized in that: The reinforcing mesh is made of a soft material.

8. The adaptive protection device for roadway top anchor bolts according to claim 1, characterized in that: The flexible box has a length of 4000mm, a width of 800mm, and a height of 150mm.

Images