Prefabricated slab wall module for plugging metal mine laneway

Abstract

The utility model relates to the technical field of mine mining equipment, in particular to a prefabricated plate wall module for blocking a metal mine laneway, which comprises a first metal grid screen, impermeable cloth and a metal support frame arranged on the lower side of the first metal grid screen. The anti-seepage cloth is tightly attached between the first metal grid screen and the metal supporting frame. The roadway opening is blocked through the prefabricated plate wall module, the underground construction period is shortened through ground prefabrication, and the operation risk is reduced; the compression resistance, the tensile resistance, the bending resistance and the deformation resistance of the plate wall are enhanced through the metal supporting frame; the geotextile anti-seepage cloth blocks a water source, the service life is prolonged, and a reliable scheme is provided for mine laneway plugging.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically a prefabricated panel wall module for sealing tunnels in metal mines. Background Technology

[0002] In underground mining operations, sealing the entrances to excavated tunnels is a crucial measure to ensure operational safety and prevent further tunnel collapse. Currently, a common method for sealing underground mine tunnel entrances is for workers to manually construct brick walls using bricks and cement mortar, stacking them one by one. During this process, workers must ensure that the mortar joints between the bricks are uniform and full. Only in this way can the brick wall possess good integrity and sufficient strength, thereby achieving the goals of sealing the tunnel entrance, ensuring operational safety, and preventing collapse.

[0003] However, traditional bricklaying methods have the following problems: the narrow space and complex environment underground make it difficult and time-consuming to carry out processes such as foundation cleaning and bricklaying. In addition, the long curing period of brick walls seriously affects construction efficiency; poor transportation conditions increase material transportation costs, and the large amount of labor input and the purchase and maintenance costs of auxiliary equipment drive up the overall construction cost; at the same time, the complex geology underground can easily cause accidents such as roof collapse, harmful gases can easily accumulate, bricklaying operations are labor-intensive, workers are prone to fatigue leading to more operational errors, and safety hazards are prominent. Utility Model Content

[0004] The purpose of this utility model is to provide a prefabricated panel wall module for sealing tunnel entrances in metal mines. This module addresses the problems of current methods for sealing tunnel entrances using brick masonry, which involve difficult and time-consuming construction procedures due to the underground environment, long curing periods, and reduced efficiency; high transportation, labor, and equipment costs, increasing overall expenses; and significant safety hazards due to complex geology, harmful gases, and high-intensity operations.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precast panel wall module for sealing tunnels in metal mines, comprising a first metal grid screen, a seepage-proof cloth, and a metal support frame, wherein the metal support frame is disposed on the lower side of the first metal grid screen, and the seepage-proof cloth is tightly fitted between the first metal grid screen and the metal support frame.

[0006] Furthermore, the metal support frame is composed of an inner layer of reinforcing mesh, a second metal grid screen, and an outer layer of reinforcing mesh arranged sequentially from top to bottom, and a plurality of support rods arranged at intervals along the lower outer edge of the inner layer of reinforcing mesh; one end of the plurality of support rods is connected to the upper outer edge of the outer layer of reinforcing mesh, and the second metal grid screen is located between and connected to the plurality of support rods; the upper outer edge of the inner layer of reinforcing mesh is connected to the lower outer edge of the first metal grid screen; the impermeable fabric is tightly fitted between the first metal grid screen and the inner layer of reinforcing mesh.

[0007] Furthermore, the mesh size of both the first and second metal mesh screens is 50*50mm, and the wire diameter is φ2mm.

[0008] Furthermore, the inner steel mesh has a mesh size of 150*150mm and a wire diameter of φ6mm.

[0009] Furthermore, the outer steel mesh has a mesh size of 300*300mm and a wire diameter of φ6mm.

[0010] Furthermore, the impermeable fabric is made of geotextile.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention, when implementing tunnel entrance sealing operations, achieves a dual improvement in construction efficiency and safety through the coordinated work of multiple prefabricated wall modules and the cooperation of a first metal mesh screen, impermeable fabric, and metal support frame. The prefabrication mode transfers a large amount of work to the surface, shortens the underground construction cycle, and avoids the safety risks faced by workers in the complex underground environment. The metal support frame also improves the compressive, tensile, bending, and deformation resistance of the wall. At the same time, the impermeable fabric, made of geotextile, with its excellent waterproof performance, blocks water erosion and extends the service life of the wall, providing a reliable solution for tunnel sealing projects in metal mines. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the prefabricated panel wall module for sealing tunnels in metal mines according to this utility model;

[0014] Figure 2 This is a structural schematic diagram of the prefabricated panel wall module for sealing tunnels in metal mines according to this utility model;

[0015] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 This is a side view schematic diagram of the prefabricated panel wall module for sealing tunnels in metal mines according to this utility model.

[0017] Figure 5 This is a side view schematic diagram of the prefabricated panel wall module for sealing tunnels in metal mines according to this utility model.

[0018] In the diagram: 1. First metal mesh screen; 2. Impermeable fabric; 3. Metal support frame; 4. Inner steel mesh; 5. Second metal mesh screen; 6. Outer steel mesh; 7. Support rod. Detailed Implementation

[0019] Please see Figure 1-5 A precast panel wall module for sealing tunnels in metal mines includes a first metal grid screen 1, a seepage-proof cloth 2, and a metal support frame 3. The metal support frame 3 is located on the lower side of the first metal grid screen 1, and the seepage-proof cloth 2 is tightly attached between the first metal grid screen 1 and the metal support frame 3.

[0020] The metal support frame 3 consists of an inner steel mesh 4, a second metal grid screen 5, and an outer steel mesh 6 arranged sequentially from top to bottom, and multiple support rods 7 arranged at intervals along the lower outer edge of the inner steel mesh 4. One end of each support rod 7 is connected to the upper outer edge of the outer steel mesh 6, and the second metal grid screen 5 is located between and connected to the support rods 7. The upper outer edge of the inner steel mesh 4 is fixed to the lower outer edge of the first metal grid screen 1 by C-shaped nails. This connection method forms a firm fastening by driving the C-shaped nails into the edges of the two layers of structure, ensuring that the inner steel mesh 4 and the first metal grid screen 1 are combined. The impermeable fabric 2 is tightly attached between the first metal grid screen 1 and the inner steel mesh 4.

[0021] The structure adopts a layered three-dimensional structure that combines an inner steel mesh 4, a second metal mesh 5, an outer steel mesh 6, and a support rod 7. The inner steel mesh 4 and the outer steel mesh 6 form a stable upper and lower support surface, which, together with the middle second metal mesh 5, makes the metal support frame 3 stronger and enhances the overall structural strength.

[0022] The first metal mesh 1 and the second metal mesh 5 both have a mesh size of 50*50mm and a wire diameter of φ2mm. Due to their mesh structure, the first metal mesh 1 and the second metal mesh 5 can provide sufficient adhesion points for the wet sprayed concrete during wet spraying, increasing the grouting strength of the wet sprayed concrete, and ensuring a tight bond between the concrete and the first metal mesh 1 and the second metal mesh 5, thereby improving the integrity and density of the precast wall module.

[0023] The inner layer of reinforcing mesh 4 has a mesh size of 150*150mm and a wire diameter of φ6mm. The size and specifications of the inner layer of reinforcing mesh 4 can restrain the concrete, improve the tensile and shear strength of the precast wall module, and prevent the precast wall module from cracking and breaking when subjected to external forces.

[0024] The outer steel mesh 6 has a mesh size of 300*300mm and a wire diameter of φ6mm. Although the mesh spacing of the outer steel mesh 6 is relatively large, the diameter of the steel bars is relatively thick, which can enhance the bending resistance of the precast wall module, enabling it to better withstand the bending force generated by the complex geological stress in the mine, and ensuring the stability and safety of the precast wall module during long-term use.

[0025] The seepage-proof fabric 2 is made of geotextile. Utilizing the excellent seepage-proof performance of geotextile, it blocks groundwater and other water sources from eroding the wall composed of multiple precast wall modules, avoiding the decrease in concrete strength and steel corrosion caused by water infiltration, extending the service life of the wall, and preventing problems such as water accumulation in the tunnel.

[0026] Working process and principle: Based on the actual dimensions of the tunnel entrance, multiple precast wall modules are spliced ​​together. At the pre-reserved rebar joints between adjacent precast wall modules, double-strand iron wire is used for crisscrossing in a figure-eight pattern, with no less than three crisscrosses at each joint. Subsequently, holes are drilled in the tunnel wall at the designed spacing using an anchor drilling rig, high-strength anchors are inserted, and fixed with cement mortar. After the anchoring agent has cured, the precast wall modules are connected to the anchors by welding, ensuring they are tightly attached to the tunnel wall to form a sealing structure that meets the sealing requirements of mine tunnel entrances.

[0027] In each precast wall module, a first metal mesh screen 1, an impermeable fabric 2, and a metal support frame 3 are combined. The metal support frame 3 adopts a three-dimensional structure, with an inner steel mesh 4, a second metal mesh screen 5, an outer steel mesh 6, and support rods 7 working together. The inner steel mesh 4 and the outer steel mesh 6 form a support surface, the second metal mesh screen 5 enhances structural strength, and the support rods 7 distribute pressure. During installation, the first metal mesh screen 1 of the precast wall module faces the inside of the tunnel entrance, and high-strength mortar is injected into the gaps within the metal support frame 3 of the precast wall module using a wet spraying device. During this process, the mesh structure of the second metal mesh screen 5 provides adhesion points for the wet sprayed material, enhancing the mortar adhesion strength and ensuring a tight bond between the concrete and the second metal mesh screen 5, thus improving the integrity and density of the precast wall module. The inner steel mesh 4 confines the concrete, improving the module's tensile and shear resistance; the outer steel mesh 6 enhances the bending resistance of the precast wall module, enabling it to withstand complex geological stresses. In addition, geotextile 2 is made of geotextile, which has good seepage prevention performance to block groundwater and other water sources from eroding, avoid the decline of concrete strength and steel corrosion, extend the service life of the panel wall, and finally form a solid support wall to seal the tunnels of metal mines.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precast panel wall module for sealing tunnels in metal mines, characterized in that, It includes a first metal grid screen (1), a seepage-proof cloth (2) and a metal support frame (3). The metal support frame (3) is located on the lower side of the first metal grid screen (1), and the seepage-proof cloth (2) is tightly attached between the first metal grid screen (1) and the metal support frame (3).

2. The precast panel wall module according to claim 1, characterized in that, The metal support frame (3) consists of an inner steel mesh (4), a second metal grid screen (5), and an outer steel mesh (6) arranged sequentially from top to bottom, and a plurality of support rods (7) arranged at intervals along the lower outer edge of the inner steel mesh (4); one end of the plurality of support rods (7) is connected to the upper outer edge of the outer steel mesh (6), and the second metal grid screen (5) is located between and connected to the plurality of support rods (7); the upper outer edge of the inner steel mesh (4) is connected to the lower outer edge of the first metal grid screen (1); the impermeable cloth (2) is tightly fitted between the first metal grid screen (1) and the inner steel mesh (4).

3. The precast panel wall module according to claim 2, characterized in that, The mesh size of the first metal mesh screen (1) and the second metal mesh screen (5) is 50*50mm, and the wire diameter is φ2mm.

4. The precast panel wall module according to claim 2, characterized in that, The inner steel mesh (4) has a mesh size of 150*150mm and a wire diameter of φ6mm.

5. The precast panel wall module according to claim 2, characterized in that, The outer steel mesh (6) has a mesh size of 300*300mm and a wire diameter of φ6mm.

6. The precast panel wall module according to claim 1, characterized in that, The impermeable fabric (2) is made of geotextile.

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