Anchor rod mechanism for coal mine tunnel

Abstract

The utility model belongs to the technical field of anchor rod support, and particularly relates to an anchor rod mechanism for a coal mine tunnel. The sheath is located on the outer side of the anchor rod and used for compacting and reinforcing connection between the mortar and the anchor rod and promoting the mortar to spread outwards to increase the contact surface between the mortar and the ore rock; and the overflow holes are uniformly distributed in the sheath and are used for penetrating through mortar to form a transverse supporting column structure, so that the effect of fixing the anchor rod and the sheath in a multi-layer manner is achieved, and the supporting stability is improved. Mortar can be compacted to form an inner and outer multi-layer mounting structure, the contact surface is improved, the mounting stability is ensured, meanwhile, a multi-layer supporting effect can be formed on the anchor rod, and the anchor rod can still keep stable use performance under the mine rock vibration environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of anchor rod support, in particular to an anchor rod mechanism for coal mine tunnels. Background Art

[0002] Anchor bolts are the most basic component of roadway support in coal mines. They reinforce the surrounding rock of the roadway, allowing the surrounding rock to support itself. The support system and construction process are constantly adapted to the dynamic state of surrounding rock deformation, thereby achieving the purpose of controlling surrounding rock deformation and maintaining roadway stability.

[0003] At present, in actual application, it is found that the existing coal mine roadway anchor bolts are only connected to the drilled hole through mortar. However, after the mortar is filled, bubbles are easily formed inside the mortar when the slurry is dispersed. The mortar filling layer is not compact enough. During the coal mine gas extraction operation, the ore rock will be affected and produce intermittent slight vibrations. This vibration will cause gaps in the mortar filling layer, causing the anchor bolt to loosen, which is not conducive to the safe operation of the coal mine roadway.

[0004] In order to solve the above problems, this application proposes an anchor mechanism for coal mine tunnels. Utility Model Content

[0005] The purpose of the utility model is to provide an anchor mechanism for coal mine tunnels, which solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is an anchor mechanism for coal mine tunnels, comprising: an anchor rod; a sheath, which is located on the outside of the anchor rod and is used to compact and reinforce the connection between the mortar and the anchor rod, while promoting the mortar to spread outward to increase the contact surface with the ore rock; overflow holes are evenly distributed inside the sheath and are used to pass the mortar through to form a horizontal support column structure, thereby achieving the effect of multi-layer fixing of the anchor rod and the sheath, and increasing the support stability.

[0008] Furthermore, a pad is provided on the outer side of the lower end of the anchor rod, and the sheath is tightened and fixed by a push ring at the upper end thereof.

[0009] Furthermore, a pressure plate is provided on the outer side of the upper end of the sleeve, which is squeezed by the support at the upper end of the anchor rod and expands outward to compact the mortar and fix it inside the drill hole and the ore rock.

[0010] Furthermore, a guide edge is provided at the upper end of the pressing plate, which is used to guide the pressing plate to deform outward when contacting the pillar.

[0011] Furthermore, a convex disc is provided at the upper end of the support column, and side holes are evenly opened in the adjacent outer area thereof for passing mortar to increase the connection contact surface.

[0012] Furthermore, a nut for tightening the gasket is installed on the outer side of the lower end of the anchor rod.

[0013] Furthermore, a side groove is formed between the sheath and the anchor rod for mortar coagulation.

[0014] The utility model has the following beneficial effects:

[0015] The utility model adopts the inner and outer combination of the sheath and the anchor rod, and can compact the injected mortar through the sheath to make the connection with the anchor rod more tight, thereby increasing the contact surface with the mortar, ensuring the stable installation of the anchor rod, and preventing the connection surface from being dispersed due to the outward leakage of the mortar, thereby ensuring the stability of the connection surface and facilitating the operation safety in the coal mine roadway;

[0016] After the utility model compacts the mortar through the sheath, the mortar will also be filled in the convex plate and the overflow hole, increasing the cross-section after stabilization to form a multi-layer tension support effect for the anchor rod, so that the anchor rod can still maintain stable supporting performance when the mine rock vibrates, which is convenient for the staff to take corresponding measures in time, improving the stability of the tunnel while ensuring the safety of personnel.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the exploded structure of the sheath and anchor rod of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal planar structure of the sheath of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the combined state of the pressure plate and the support column of the present utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] In the figure: 1. Anchor rod; 2. Base plate; 3. Nut; 4. Sheath; 5. Pressure plate; 6. Guide edge; 7. Boss; 8. Overflow hole; 9. Support; 10. Side hole; 11. Push ring; 12. Side groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] See also Figure 1-4 As shown, the utility model is an anchor mechanism for coal mine tunnels, comprising: an anchor rod 1; a nut 3 for tightening a backing plate 2 is installed on the outer side of the lower end of the anchor rod 1; a sheath 4, located on the outer side of the anchor rod 1, for compacting the mortar and strengthening the connection with the anchor rod 1, while at the same time promoting the mortar to spread outward to increase the contact surface with the ore rock;

[0028] Overflow holes 8 are evenly distributed inside the sheath 4 and are used to pass through the mortar to form a horizontal support column structure, achieving the effect of multi-layer fixing of the anchor rod 1 and the sheath 4, thereby increasing the support stability;

[0029] This embodiment provides an anchor support structure that can maintain stable performance under rock vibration. After using the sheath 4 to compact the mortar and increase the contact surface, multiple layers of transverse pillars are formed by overflow to achieve the effect of multi-layer fixation of the anchor 1, thereby ensuring the performance under rock vibration and facilitating the staff to take corresponding measures in a timely manner.

[0030] A backing plate 2 is provided on the outer side of the lower end of the anchor rod 1 , and the sheath 4 is pressed against and fixed by a push ring 11 on the upper end thereof, thereby achieving a double fixing effect on the sheath 4 .

[0031] Among them, a pressure plate 5 is provided on the outer side of the upper end of the sheath 4, which is squeezed by the support 9 at the upper end of the anchor rod 1 and expands outward. It is used to compact the mortar and fix it inside the drill hole and the ore rock to prevent the presence of bubbles and other gaps in the mortar, ensuring the stability of the structure after the mortar solidifies.

[0032] The upper end of the pressing plate 5 is provided with a guide edge 6 for guiding the pressing plate 5 to deform outward when contacting the support 9 .

[0033] Among them, a convex plate 7 is provided at the upper end of the support 9, and side holes 10 are evenly opened in the adjacent outer area thereof for passing mortar to increase the connection contact surface and achieve the effect of extending the service length of the anchor rod.

[0034] A side groove 12 is formed between the sheath 4 and the anchor rod 1 for mortar solidification.

[0035] It can be understood that the utility model can compact the mortar to form a multi-layer installation structure inside and outside, which can not only improve the contact surface to ensure installation stability, but also form a multi-layer support effect for the anchor rod, so that it can still maintain stable performance in the vibration environment of the mine rock.

[0036] A specific application of the operating process of this embodiment is: when in use, the injected mortar is compacted by pushing the sheath 4 so that it is densely distributed on the outside of the anchor rod 1 and the distribution space is limited, so that the mortar is compacted in a local area, increasing the connection stability while also promoting the mortar to spread outward to increase the contact surface, ensuring the installation stability of the anchor rod, and at the same time, the mortar is compressed inside the side groove 12 and then spreads to the inside of the overflow hole 8 and connects with the drill hole, thereby forming a multi-layer transverse structure, achieving the effect of multi-layer support for the anchor rod 1, so that the anchor rod can still maintain stable performance in an environment of rock vibration, which is convenient for the staff to take corresponding measures in time.

[0037] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0038] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anchor mechanism for coal mine tunnels, characterized in that: include: Anchor rod (1); The sheath (4) is located outside the anchor rod (1) and is used to compact the mortar and strengthen the connection with the anchor rod (1), while promoting the mortar to spread outward to increase the contact surface with the ore rock; Overflow holes (8) are evenly distributed inside the jacket (4) and are used to pass through the mortar to form a transverse support column structure, thereby achieving the effect of multi-layer fixing of the anchor rods (1) and the jacket (4) and increasing the support stability.

2. The anchor mechanism for coal mine tunnel according to claim 1, characterized in that: A backing plate (2) is provided on the outer side of the lower end of the anchor rod (1), and the sheath (4) is pressed tightly by a push ring (11) at the upper end thereof to fix it.

3. The anchor mechanism for coal mine tunnel according to claim 1, characterized in that: A pressure plate (5) is provided on the outer side of the upper end of the sheath (4), which is squeezed by the support (9) at the upper end of the anchor rod (1) and expands outwards to compact the mortar and fix it inside the drill hole and the ore rock.

4. The anchor mechanism for coal mine tunnel according to claim 3, characterized in that: The upper end of the pressing plate (5) is provided with a guide edge (6) for guiding the pressing plate (5) to deform outward when contacting the pillar (9).

5. The anchor mechanism for coal mine tunnel according to claim 3, characterized in that: The upper end of the support (9) is provided with a convex plate (7), and side holes (10) are evenly opened in the adjacent outer area thereof for passing mortar to increase the connection contact surface.

6. The anchor mechanism for coal mine tunnel according to claim 1, characterized in that: A nut (3) for tightening the backing plate (2) is installed on the outer side of the lower end of the anchor rod (1).

7. The anchor mechanism for coal mine tunnel according to claim 1, characterized in that: A side groove (12) is formed between the sheath (4) and the anchor rod (1) for mortar coagulation.

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