Metal net for supporting coal mine tunnel

Abstract

A metal net for supporting a coal mine tunnel comprises a metal wire net body. The metal wire mesh is a metal wire crocheted mesh with rhombic mesh holes; a plurality of transverse ribs are arranged in the metal wire mesh in the horizontal direction; a plurality of longitudinal ribs are arranged in the wire mesh in the vertical direction; the transverse bars and the longitudinal bars are connected through welding; a plurality of connecting discs are arranged on one side of the metal wire mesh through welding; a plurality of connecting holes are formed in the connecting disc; the connecting discs are arranged at the connecting positions of the transverse bars and the longitudinal bars. The connecting discs are connected with the transverse bars and the longitudinal bars in a welding manner; the side, provided with the connecting disc, of the transverse rib extends outwards and is fixedly provided with a hanging piece. According to the utility model, the plurality of transverse bars and longitudinal bars are arranged in the metal wire mesh, so that the overall structural strength and the tensile strength from the transverse direction and the longitudinal direction of the metal wire mesh are improved, the overall supporting effect and the stability of the metal wire mesh serving as the supporting mesh are improved, and the overall supporting bearing capacity of the supporting mesh is improved.

Description

Technical Field

[0001] The utility model belongs to the field of coal mine tunnel support, in particular to a metal mesh for coal mine tunnel support. Background Art

[0002] In coal mining, metal support nets are usually installed on the mining working face of the coal mine tunnel for safety support to ensure the personal safety of the coal mine tunnel and workers. The usual method of use is to connect the metal support net according to the use requirements, and then fix the metal support net through anchor rods set on the tunnel wall to complete the installation of the basic metal support net. Concrete is then sprayed onto the metal support net through a concrete spraying device to form a complete coal mine tunnel support.

[0003] Currently, the commonly used metal mesh for tunnel support is mostly a metal wire mesh with diamond mesh holes made by weaving technology. This type of metal mesh for support has the advantages of uniform mesh holes, flat mesh surface, and flexible bending. However, its own strength is low, support stability is poor, and protection strength is weak. The support effect when used in coal mine tunnels is unstable and prone to deformation and loosening. During the excavation and mining process of coal mine tunnels, when the surrounding rock deforms and displaces, this type of metal support mesh is difficult to resist such deformation and displacement, and the protection effect on the tunnel and staff is poor. In addition, the commonly used metal support mesh has poor bonding support effect on concrete during spraying, and concrete is prone to slipping from the support mesh. Utility Model Content

[0004] The purpose of the present utility model is to provide a metal mesh for supporting coal mine tunnels, so as to solve the problem that the metal mesh for tunnel support commonly used at present is mostly a metal wire chain link fence with diamond mesh holes made by weaving technology. This type of metal mesh for support has the advantages of uniform mesh holes, flat mesh surface, and flexible bending, but its own strength is low, support stability is poor, and protection strength is weak. The support effect when used in coal mine tunnels is unstable and prone to deformation and loosening. During the excavation and mining process of coal mine tunnels, when the surrounding rock is deformed and displaced, this type of metal support mesh is difficult to resist such deformation and displacement, and the protection effect on the tunnel and staff is poor. In addition, the commonly used metal support mesh has a poor bonding support effect on concrete when spraying concrete, and concrete is prone to slipping from the support mesh. Technical problems.

[0005] To achieve the above-mentioned purpose, the specific technical solution of the metal mesh for supporting coal mine tunnels in the present invention is as follows:

[0006] A metal mesh for supporting coal mine tunnels, comprising a metal mesh; the metal mesh is a metal wire chain link fence with diamond-shaped mesh holes; a plurality of horizontal bars are arranged in the horizontal direction within the metal mesh; a plurality of longitudinal bars are arranged in the vertical direction within the metal mesh; the positions where the horizontal bars are connected to the longitudinal bars are connected by welding; a plurality of connecting plates are arranged on one side of the metal mesh by welding; a plurality of connecting holes are arranged on the connecting plates; the connecting plates are arranged at the positions where the plurality of horizontal bars are connected to the longitudinal bars; the connecting plates are connected to the opposite horizontal bars and the longitudinal bars by welding; the horizontal bars are fixed with hangers extending outward from the side where the connecting plates are arranged.

[0007] Furthermore, a connecting bolt is provided in the connecting hole through a threaded connection.

[0008] Furthermore, the hanger is provided with a plurality of hanging wires extending to both sides.

[0009] The utility model discloses a metal mesh for supporting coal mine tunnels, which has the following advantages: a plurality of transverse and longitudinal reinforcements are arranged in the metal mesh, and a plurality of connecting plates are arranged to weld the transverse reinforcements, longitudinal reinforcements and metal mesh into a whole, and the mesh is fixed by the tunnel anchor rod, thereby increasing the overall structural strength of the metal mesh and the tensile strength from the transverse and longitudinal directions, improving the overall supporting effect and the stability of the metal mesh as a support mesh, so that the mesh can better maintain its shape and position, and is not easy to deform or loosen, thereby improving the overall support bearing capacity of the support mesh, and can withstand the pressure generated by the tunnel surrounding rock. During the excavation and mining of the coal mine tunnel, when the surrounding rock is deformed and displaced, the support mesh can effectively resist such deformation and displacement, and protect the tunnel surrounding rock from being broken and falling off. When the coal mine tunnel support mesh is erected, concrete is sprayed onto the metal support mesh by a concrete spraying device, and the concrete is supported by a hanger fixedly extended outward from one side of the transverse reinforcement and a plurality of hanging wires extended on both sides of the hanger, thereby increasing the bonding area between the concrete and the support mesh, and preventing the concrete from falling off the support mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the connection plate installation structure of the utility model;

[0012] Figure 3 For this utility model Figure 2 A magnified schematic diagram of area A in the middle;

[0013] Explanation of the markings in the figure: 1. Metal mesh; 2. Horizontal reinforcement; 3. Longitudinal reinforcement; 4. Connecting plate; 5. Connecting hole; 6. Hanging piece; 7. Connecting bolt; 8. Hanging wire. DETAILED DESCRIPTION

[0014] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of the metal mesh for coal mine tunnel support of the present invention in conjunction with the accompanying drawings.

[0015] like Figure 1-3 As shown, the utility model is a metal mesh for supporting coal mine tunnels, comprising a metal mesh 1; the metal mesh 1 is a metal wire chain link fence with diamond mesh holes; a plurality of horizontal ribs 2 are arranged in the horizontal direction in the metal mesh 1; a plurality of longitudinal ribs 3 are arranged in the vertical direction in the metal mesh 1; the connecting positions of the horizontal ribs 2 and the longitudinal ribs 3 are connected by welding; a plurality of connecting plates 4 are arranged on one side of the metal mesh 1 by welding; a plurality of connecting holes 5 are arranged on the connecting plates 4; connecting bolts 7 are arranged in the connecting holes 5 by threaded connection; the connecting plates 4 are arranged at the connecting positions of the plurality of horizontal ribs 2 and the longitudinal ribs 3; the connecting plates 4 are connected to the opposite horizontal ribs 2 and the longitudinal ribs 3 by welding; the horizontal ribs 2 are fixed with hangers 6 extending outward from the side where the connecting plates 4 are arranged.

[0016] Combine Figure 1-3 As shown, when in use, according to the use requirements of the coal mine tunnel wall and working surface, an appropriate number of wire meshes 1 are selected, and the adjacent wire meshes 1 are connected by connecting bolts 7 through the connecting holes 5 on the connecting plate 4, and the wire mesh 1 itself and the transverse reinforcement 2 and longitudinal reinforcement 3 of the adjacent wire meshes 1 are connected as a whole, and then the wire mesh 1 is fixed to the tunnel wall and working surface through the anchor rods set on the tunnel wall to complete the basic support and erection. Multiple connecting plates 4 weld the transverse reinforcement 2, longitudinal reinforcement 3, and wire mesh 1 as a whole, thereby increasing the overall structural strength of the wire mesh 1 and the tensile strength from the transverse and longitudinal directions, improving the overall support effect and stability of the wire mesh 1 as a support net, so that it can better maintain its shape and position, and is not prone to deformation or loosening, thereby improving the overall support bearing capacity of the support net and being able to withstand the pressure generated by the tunnel surrounding rock. During the coal mine tunnel excavation and mining process, when the surrounding rock is deformed and displaced, the support net can effectively resist such deformation and displacement, and protect the tunnel surrounding rock from being broken and falling off.

[0017] The hanger 6 is provided with multiple hanging wires 8 extending to both sides. When the coal mine tunnel support net is erected, concrete is sprayed onto the metal support net through a concrete spraying device. The hanger 6 fixedly extended outward from one side of the transverse reinforcement 2 and the multiple hanging wires 8 extended on both sides of the hanger 6 are used to cooperate and support the concrete, thereby increasing the bonding area between the concrete and the support net and preventing the concrete from falling off the support net.

[0018] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A metal mesh for coal mine tunnel support, characterized in that: The invention comprises a metal wire mesh (1); the metal wire mesh (1) is a metal wire chain link fence provided with diamond mesh holes; a plurality of transverse ribs (2) are provided in the horizontal direction in the metal wire mesh (1); a plurality of longitudinal ribs (3) are provided in the vertical direction in the metal wire mesh (1); the transverse ribs (2) and the longitudinal ribs (3) are connected at the connection position by welding; a plurality of connecting plates (4) are provided on one side of the metal wire mesh (1) by welding; a plurality of connecting holes (5) are provided on the connecting plates (4); the connecting plates (4) are provided at the connection position of the plurality of transverse ribs (2) and the longitudinal ribs (3); the connecting plates (4) are connected to the transverse ribs (2) and the longitudinal ribs (3) by welding; and the transverse ribs (2) are fixedly provided with a hanger (6) extending outward from the side provided with the connecting plates (4).

2. A metal mesh for coal mine tunnel support according to claim 1, characterized in that: A connecting bolt (7) is provided in the connecting hole (5) through a threaded connection.

3. The metal mesh for coal mine tunnel support according to claim 1, characterized in that: The hanging piece (6) is provided with a plurality of hanging wires (8) extending toward both sides.

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