Embedded artificial false bottom layout structure

Abstract

The utility model provides an embedded artificial false bottom laying structure, and belongs to the field of mining, and the embedded artificial false bottom laying structure comprises a bottom layer embedded structure arranged on a bottom plate of an access stope and fixing assemblies arranged in hanging wall and footwall surrounding rocks.The bottom layer embedded structure is arranged on a bottom plate of the access stope, and the fixing assemblies are arranged in hanging wall surrounding rocksand footwall surrounding rocks; the bottom layer embedded structure comprises a concrete layer and a reinforcing mesh arranged in the concrete layer, the width of the concrete layer is larger than that of the access stope, and the reinforcing mesh comprises a plurality of main ribs arranged perpendicular to the access stope and auxiliary ribs arranged along the access stope; the main reinforcements comprise first main reinforcements and second main reinforcements which are arranged at intervals, the first main reinforcements are connected with the fixing assemblies, and the second main reinforcements are embedded into the hanging wall surrounding rock and the footwall surrounding rock. Through the mutual synergistic effect of the embedded concrete layer and the reinforcing mesh, the strength of the embedded artificial false bottom layout structure is improved, the probability of slippage of the upper-layer filling body and the artificial false bottom is effectively reduced, the risk of overall collapse of the upper-layer filling body and the artificial false bottom is avoided, and the operation safety of personnel is improved.

Description

Technical Field

[0001] This application relates to the field of mining technology, specifically to an embedded artificial false ceiling structure. Background Technology

[0002] In mining resource extraction and utilization, the downward-sloping, layered-entry backfilling mining method is mainly used for mining unstable ore bodies. This method essentially involves top-down layered mining and backfilling, with each layer's mining work carried out under the protection of an artificial false bottom in the preceding layer, thus improving operational safety. However, when mining steeply dipping, extremely thin, fractured ore bodies, such as those interspersed within weak, fractured rock strata, the ore body's strength and width are only sufficient for constructing a single entry point. The steep dip angle of the ore body is insufficient to stagger the upper and lower entry points, resulting in a near-perpendicular arrangement of the upper and lower entry points. This exposes the artificial false bottom of the upper entry point completely within the lower entry point. For such fractured ore bodies, during backfilling of the goaf, the surrounding rock of the hanging wall and footwall becomes cemented, making the artificial false bottom prone to slippage between the two sides of the surrounding rock. Simply suspending the false bottom on the two sides of the stope is insufficient to support its stability, posing a risk of the entire false bottom collapsing. Summary of the Invention

[0003] In view of the technical problems existing in the background art, this application provides an embedded artificial false bottom layout structure. The embedded artificial false bottom layout structure improves the strength of the embedded artificial false bottom layout structure through the synergistic effect of the embedded concrete layer and the steel mesh, effectively reduces the probability of slippage of the upper filling body and the artificial false bottom, avoids the risk of the upper filling body and the artificial false bottom collapsing as a whole, and improves the safety of personnel operation.

[0004] In a first aspect, embodiments of this application provide an embedded artificial false bottom layout structure, including a bottom embedded structure disposed on the bottom plate of the access stope and a fixing component disposed in the surrounding rock of the upper and lower walls; the bottom embedded structure includes a concrete layer and a steel mesh disposed in the concrete layer, the width of the concrete layer being greater than the width of the access stope, the steel mesh including a plurality of main bars arranged perpendicular to the access stope and secondary bars arranged along the access stope; the main bars include first main bars and second main bars arranged at intervals, the first main bars being connected to the fixing component, and the second main bars being embedded in the surrounding rock of the upper and lower walls.

[0005] In the technical solution of this application embodiment, firstly, by setting the width of the concrete layer to be greater than the width of the access stope, the two ends of the concrete layer are embedded in the upper and lower wall rock respectively. This results in a "convex" structure after the access stope is backfilled, effectively reducing the probability of slippage of the upper backfill and artificial false bottom, avoiding the risk of overall collapse of the upper backfill and artificial false bottom, and improving the safety of personnel operation. Secondly, a portion of the main reinforcement is bent and connected to the fixing components in the upper and lower wall rock, while the other portion is embedded in the upper and lower wall rock. This allows the main reinforcement to be fixed to the upper and lower wall rock in different ways, thereby increasing the support strength of the steel mesh and thus improving the strength of the embedded artificial false bottom layout structure.

[0006] In some embodiments, the length of the second main reinforcement bar is greater than the width of the concrete layer, and the length of the second main reinforcement bar is 150-250cm longer than the width of the access mining area; the width of the concrete layer is 100-200cm wider than the width of the access mining area.

[0007] In this embodiment, by embedding the concrete layer into the surrounding rock of the upper and lower plates, the contact between the bottom embedded structure and the surrounding rock of the upper and lower plates is strengthened; at the same time, by making contact between the two ends of the second main reinforcement and the surrounding rock of the upper and lower plates respectively, the contact between the bottom embedded structure and the surrounding rock of the upper and lower plates is further strengthened.

[0008] In some embodiments, the spacing between adjacent first and second main reinforcing bars is 0.8 to 1.0 m.

[0009] In this embodiment, by controlling the spacing between the first and second main bars within a reasonable range, the strength of the steel mesh is ensured while avoiding the overuse of the main bars.

[0010] In some embodiments, the fixing component includes a round steel bar that is inclined downwards and has an angle of 3° to 10° with the surrounding rock of the upper and lower plates.

[0011] In this embodiment, by inserting the round steel bar downwards into the upper and lower surrounding rock, it is subjected to a downward pulling force, preventing it from falling out of the surrounding rock and improving the fixing firmness of the second main reinforcement. At the same time, the round steel bar itself has high strength, further improving its fixing firmness to the second main reinforcement.

[0012] In some embodiments, the length of the round steel bar is 1.0 to 1.5 m, the length embedded in the upper and lower wall surrounding rock is 0.95 to 1.35 m, and the length exposed in the access stope is 0.05 to 0.15 m; the second main reinforcement bar is connected to the portion of the round steel bar exposed in the access stope; the height of the portion of the round steel bar exposed in the access stope from the bottom plate of the access stope is 0.8 to 1.2 m.

[0013] In some embodiments, the main reinforcement is disposed below the secondary reinforcement.

[0014] In this embodiment, by placing the main reinforcement below the secondary reinforcement, the interaction force between the main reinforcement and the secondary reinforcement can be increased, thereby improving the strength of the underlying embedded structure.

[0015] In some embodiments, the embedded artificial false bottom arrangement structure further includes several hanging bars that are perpendicular to the steel mesh and connected to the steel mesh of the previous layer, with the lower end of the hanging bars connected to the intersection of the main and secondary bars on the steel mesh.

[0016] In this embodiment, the bottom embedded structure is suspended on the bottom plate of the upper layer by the suspension rod, which further improves the strength of the artificial false bottom of this layer.

[0017] In some embodiments, the mesh size of the steel reinforcement mesh is (250-300) mm × (250-300) mm, the diameter of the main reinforcement is 15-17 mm, and the diameter of the secondary reinforcement is 15-17 mm.

[0018] In some embodiments, adjacent suspension rods are spaced 15 to 25 grids apart.

[0019] In some embodiments, the connection method is either binding or welding.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the embedded artificial dummy bottom arrangement structure in the embodiments of this application;

[0023] Figure 2 This is a cross-sectional view of the rock mass to be mined in the embodiments of this application;

[0024] Explanation of reference numerals in the attached drawings: 100-Embedded artificial false bottom layout structure; 1-Bottom layer embedded structure; 2-Fixing component; 3-Hanging bar; 4-Upper wall surrounding rock; 5-Lower wall surrounding rock; 6-Upper layer surrounding rock or upper layer artificial false bottom; 7-Lower layer ore body to be mined; 11-Concrete layer; 12-First main reinforcement; 13-Second main reinforcement. Detailed Implementation

[0025] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "several" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0031] When using the downward-layered approach backfilling mining method to mine steeply dipping, extremely thin, fractured ore bodies, the strength and width of the ore body are only sufficient for constructing a single approach. The steep dip angle of the ore body is also insufficient to stagger the upper and lower approach layers, resulting in the upper and lower approach layers being arranged almost vertically. For this type of fractured ore body, when backfilling the goaf, the surrounding rock of the upper and lower walls becomes cemented during backfilling, causing the artificial false bottom to easily slip between the two sides of the surrounding rock. Simply suspending the false bottom on the two sides of the stope is insufficient to support its stability, and there is a risk of the entire false bottom collapsing.

[0032] To address the technical problem of overall collapse of the artificial bottom, this application provides an embedded artificial bottom arrangement structure. Through the synergistic effect of the embedded concrete layer 11 and the steel mesh, the strength of the embedded artificial bottom arrangement structure is improved, effectively reducing the probability of slippage of the upper filling body and the artificial bottom, avoiding the risk of overall collapse of the upper filling body and the artificial bottom, and improving the operational safety of personnel.

[0033] Please refer to Figure 1This is a schematic diagram of the embedded artificial false bottom arrangement structure 100 provided in the embodiment of the application. It includes a bottom embedded structure 1 set on the bottom plate of the access mining area and a fixing component 2 set in the surrounding rock of the upper and lower footwalls. The bottom embedded structure 1 includes a concrete layer 11 and a steel mesh set in the concrete layer 11. The width of the concrete layer 11 is greater than the width of the access mining area. The steel mesh includes a number of main bars arranged perpendicular to the access mining area and secondary bars arranged along the access mining area. The main bars include a first main bar 12 and a second main bar 13 arranged at intervals. The first main bar 12 is connected to the fixing component 2, and the second main bar 13 is embedded in the surrounding rock of the upper and lower footwalls. This design firstly sets the width of the concrete layer 11 to be greater than the width of the access stope, so that both ends of the concrete layer 11 are embedded in the upper surrounding rock 4 and the lower surrounding rock 5, respectively. This results in the access stope forming a "convex" structure after backfilling, rather than the conventional "square" structure (in conventional designs, the width of the concrete layer 11 is equal to the width of the access stope, thus forming a "square" structure). In other words, the embedded setting of the concrete layer 11 makes it more firmly fixed to the upper and lower surrounding rocks, thereby effectively reducing the probability of slippage of the upper backfill and artificial false bottom, avoiding the risk of the upper backfill and artificial false bottom collapsing as a whole, and improving the safety of personnel operation. Secondly, the main reinforcement bars are arranged as first main reinforcement bars 12 and second main reinforcement bars 13 spaced apart from each other. The first main reinforcement bars 12 are connected to the fixing component 2, and the second main reinforcement bars 13 are embedded in the upper and lower surrounding rock. That is, a part of the main reinforcement bars is bent and connected to the fixing component 2 in the upper and lower surrounding rock, while the other part is embedded in the upper and lower surrounding rock. This allows the main reinforcement bars to be fixed to the upper and lower surrounding rock in different ways, thereby improving the supporting strength of the steel mesh and thus improving the strength of the embedded artificial false bottom structure 100. It can be seen that this application improves the strength of the embedded artificial false bottom structure 100 through the synergistic effect of the embedded concrete layer 11 and the main reinforcement bars with different connection methods to the upper and lower surrounding rock.

[0034] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the length of the second main reinforcement 13 is greater than the width of the concrete layer 11, and the length of the second main reinforcement 13 is 150-250 cm longer than the width of the access mining area; the width of the concrete layer 11 is 100-200 cm wider than the width of the access mining area, that is, the length of the second main reinforcement 13, the width of the concrete layer 11, and the width of the access mining area decrease sequentially. This arrangement, on the one hand, improves the contact strength between the bottom embedded structure 1 and the surrounding rock by embedding the concrete layer 11 into the upper and lower wall rock; on the other hand, further improves the contact strength between the bottom embedded structure 1 and the surrounding rock by having both ends of the second main reinforcement 13 contact the upper and lower wall rock respectively. In other words, through the synergistic effect of the concrete layer 11 and the second main reinforcement 13, the contact strength between the bottom embedded structure 1 and the surrounding rock is improved, thereby increasing the strength of the embedded artificial false bottom structure 100.

[0035] Furthermore, in this embodiment, the spacing between adjacent first main reinforcement bars 12 and second main reinforcement bars 13 is 0.8 to 1.0 m. This arrangement, by controlling the spacing between the first main reinforcement bars 12 and second main reinforcement bars 13 within a reasonable range, ensures the strength of the steel mesh while avoiding excessive use of main reinforcement bars (avoiding material waste).

[0036] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the fixing component 2 includes a round steel bar 21, which is inclined downwards and forms an angle of 3° to 10° with both the upper and lower surrounding rocks. The diameter of the round steel bar 21 is 35 to 37 mm, preferably a 36 mm diameter HRB335 round steel bar. This arrangement, by inserting the round steel bar 21 downwards into the upper and lower surrounding rocks, subjects it to a downward pulling force, preventing it from falling out of the surrounding rocks and improving the fixing firmness of the second main reinforcement 13. Simultaneously, the high strength of the round steel bar 21 further enhances its fixing firmness to the second main reinforcement 13.

[0037] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the length of the round steel bar 21 is 1.0–1.5 m, the length embedded in the surrounding rock of the upper and lower walls is 0.95–1.35 m, and the length exposed in the access stope is 0.05–0.15 m. The second main reinforcement bar 122 is connected to the portion of the round steel bar 21 exposed in the access stope. The height of the portion of the round steel bar 21 exposed in the access stope from the floor plate of the access stope is 0.8–1.2 m. The connection method between the second main reinforcement bar 122 and the round steel bar 21 is either binding or welding, preferably welding. This arrangement, by welding the second main reinforcement bar 13 to the round steel bar, increases the strength of both.

[0038] Furthermore, in this embodiment, the main reinforcement is positioned below the secondary reinforcement. This arrangement enhances the interaction force between the main and secondary reinforcements, thereby increasing the strength of the underlying embedded structure 1.

[0039] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the embedded artificial false bottom structure 100 also includes several hanging bars 3 perpendicular to the reinforcing mesh and connected to the reinforcing mesh of the upper layer. The lower end of the hanging bars 3 is connected to the intersection of the main and secondary bars on the reinforcing mesh. The intersection of the main and secondary bars is fixedly connected by binding or welding. With this arrangement, the bottom embedded structure 1 is suspended from the bottom plate of the upper layer by the hanging bars 3, further improving the strength of the artificial false bottom of this layer. That is, this application improves the strength of the embedded artificial false bottom structure 100 through the synergistic effect of the embedded concrete layer 11, the reinforcing mesh, and the hanging bars 3. The hanging bars 3 are round steel with a diameter of 18-22mm, preferably HRB335 round steel with a diameter of 20mm.

[0040] Furthermore, in the embodiments of this application, the mesh size of the reinforcing steel mesh is (250~300)mm×(250~300)mm, the diameter of the main reinforcing bars is 15~17mm, preferably HRB335 round steel with a diameter of 16mm; the diameter of the secondary reinforcing bars is 15~17mm, preferably HRB335 round steel with a diameter of 16mm.

[0041] Furthermore, in the embodiments of this application, adjacent suspension rods 3 are spaced 15 to 25 grids apart in both the length and width directions.

[0042] The construction process of the embedded artificial dummy bottom arrangement structure 100 of this application will be described below through specific embodiments. Figure 2 As shown, the hanging wall and footwall of the ore body to be mined are granite, but with strong kaolinization alteration. This type of rock mass has low strength, is easily deformed, and disintegrates into sandy soil upon contact with water. The gold ore body to be mined is hosted within a granite kaolinization alteration zone, with an alteration band of approximately 30m, a ore body width of approximately 3m, a dip angle of 75°, and a strike length of 30m. According to on-site rock quality grading, the rock mass in this area is kaolinized breccia, with an average uniaxial compressive strength of 14MPa, three sets of dominant joints, and a BQ grade of V-class soft rock, indicating extremely fractured rock mass. On-site acoustic detection of the loosened zone of the rock mass indicates that the loosened zone in this area is approximately 1.2m. This ore body is a steeply dipping, extremely thin vein, and the downward backfilling mining method will be used for mining. Only one access stop can be arranged along the strike of the ore body per layer, and the access stops between upper and lower layers are arranged almost vertically, making staggered arrangements impossible. The specific construction process of the embedded artificial false bottom arrangement structure 100 of this utility model includes the following steps:

[0043] S1. Recovery

[0044] The mining of the access road adopts straight-hole slotting blasting with a blast hole depth of 2.5m. According to the LS-Dyna numerical simulation results, a total of 29 holes are arranged, including slotting holes, collapse holes, peripheral holes, bottom holes and bottom slot holes. Bottom-hole initiation is adopted, and an average of 1kg of No. 2 emulsion explosive is loaded into each hole.

[0045] During blasting and mining in the access stope, a blast hole perpendicular to the working face is drilled at the bottom corner of both the hanging wall (4) and footing wall (5). The blast hole is at a 5° angle downwards to the horizontal and uses the same charging and detonation method as the bottom hole. After each blast, a groove is formed at the bottom corner of the hanging wall (4) and footing wall (5) along the direction of the access stope.

[0046] S2. Construction fixing components

[0047] After the ore is extracted, along the direction of the access stop, first drill a downward inclined borehole with a depth of 1.3m and an inclination angle of 5° at a height of about 1 meter from the bottom plate on both sides (i.e., the upper wall rock 4 and the lower wall rock 5), perpendicular to both sides. Then, install round steel 21 in the borehole, and the length of the round steel 21 exposed in the access stop is 0.1m.

[0048] Next, in the grooves on both sides of the base plate, drill a downward inclined hole with a depth of 1.3m and an inclination angle of 5° every 1.8m perpendicular to both sides, ensuring that the horizontal distance between the drill holes in the adjacent grooves and the drill holes in the sidewalls is 0.9m.

[0049] S3. Construction steel mesh

[0050] Laying the reinforcing mesh: Lay the first main reinforcement bar 12 and the second main reinforcement bar 13 along the direction perpendicular to the access road. The length of both the first main reinforcement bar 12 and the second main reinforcement bar 13 is 200cm longer than the width of the access road. The first main reinforcement bar 12 and the second main reinforcement bar 13 are spaced apart. The two ends of the first main reinforcement bar 12 are bent and connected to the round steel bar 21. The two ends of the second main reinforcement bar 13 are inserted into the drilled holes in the grooves. That is, when laying the main reinforcement bars along the direction of the access road, one main reinforcement bar is inserted into the drilled hole in the groove (the second main reinforcement bar 13), and the other is bent upwards on both sides (the first main reinforcement bar 12), and attached to both sides of the access road, arranged alternately. Lay the secondary reinforcement bars along the direction of the access road, ensuring that the secondary reinforcement bars are above the main reinforcement bars. The mesh size of the reinforcing mesh is 300mm × 300mm.

[0051] The first main reinforcing bar 12 attached to both sides is welded to the round steel bar 21 that has been pre-cast on both sides.

[0052] S4. Construction hoisting bars

[0053] Arrange the hanging rods 3. The lower end of the hanging rods 3 is connected to the main and secondary bars of the steel mesh at the intersection, and the upper end is connected to the upper surrounding rock or the upper artificial false bottom 6. When this layer is the first layer, the upper end of the hanging rods 3 is connected to the chain link mesh of the top slab. When this layer is not the first layer, the upper end of the hanging rods 3 is connected to the steel mesh on the bottom slab of the upper layer.

[0054] Adjacent suspension rods 3 are spaced 20 grids apart in both length and width directions, meaning that the spacing between adjacent suspension rods 3 is 6m in both length and width directions.

[0055] S5. Construction of concrete layer

[0056] Wooden blocks, each 200mm in length, width, and height, are placed at the junction of the main and secondary reinforcing bars of the steel mesh to support it. Next, concrete is filled into the base slab to form a 1m high concrete layer 11, ensuring that the steel mesh is encased within this layer. The concrete layer 11 is located above the lower layer of ore body 7 to be mined.

[0057] S6. Filling the goaf

[0058] To reduce the impact of filling water on the surrounding rock during the filling process, a paste filling process is adopted.

[0059] Please refer to the following: Figures 1 to 2 According to one or more embodiments of this application, the concrete layer 11 is first embedded at both ends into the upper surrounding rock 4 and the lower surrounding rock 5, respectively, thereby forming a "convex" structure after backfilling in the access stope, making the concrete layer 11 more firmly fixed to the upper and lower surrounding rocks. Secondly, by bending a portion of the main reinforcement and connecting it to the fixing components 2 in the upper and lower surrounding rocks, and embedding the other portion into the upper and lower surrounding rocks, the main reinforcement is fixed to the upper and lower surrounding rocks in different ways, thereby improving the support strength of the steel mesh. Thirdly, the steel mesh is connected to the steel mesh of the previous layer using the hanging rod 3, further improving the strength of the artificial false bottom. That is, through the synergistic effect of the embedded concrete layer 11, the steel mesh, and the hanging rod 3, this application improves the strength of the embedded artificial false bottom layout structure 100, effectively reducing the probability of slippage of the upper filling body and the artificial false bottom, avoiding the risk of the upper filling body and the artificial false bottom collapsing as a whole, and improving the operational safety of personnel.

[0060] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. An embedded artificial false bottom arrangement structure, characterized in that, The system includes a bottom embedded structure installed on the bottom slab of the access mine and a fixing component installed in the surrounding rock of the footwall and footwall. The bottom embedded structure includes a concrete layer and a steel mesh installed in the concrete layer. The width of the concrete layer is greater than the width of the access mine. The steel mesh includes several main bars arranged perpendicular to the access mine and secondary bars arranged along the access mine. The main bars include first main bars and second main bars arranged at intervals. The first main bars are connected to the fixing component, and the second main bars are embedded in the surrounding rock of the footwall and footwall.

2. The embedded artificial false bottom arrangement structure according to claim 1, characterized in that, The length of the second main reinforcement bar is greater than the width of the concrete layer, and the length of the second main reinforcement bar is 150-250cm longer than the width of the access mining area; the width of the concrete layer is 100-200cm wider than the width of the access mining area.

3. The embedded artificial false bottom arrangement structure according to claim 1, characterized in that, The spacing between adjacent first and second main reinforcement bars is 0.8 to 1.0 m.

4. The embedded artificial false bottom arrangement structure according to claim 1, characterized in that, The fixing component includes round steel bars that are inclined downwards and have an angle of 3° to 10° with the surrounding rock of the upper and lower plates.

5. The embedded artificial false bottom arrangement structure according to claim 4, characterized in that, The length of the round steel bar is 1.0 to 1.5 m, the length embedded in the surrounding rock of the upper and lower walls is 0.95 to 1.35 m, and the length exposed in the access stope is 0.05 to 0.15 m; the second main reinforcement bar is connected to the portion of the round steel bar exposed in the access stope; the height of the portion of the round steel bar exposed in the access stope from the bottom plate of the access stope is 0.8 to 1.2 m.

6. The embedded artificial false bottom arrangement structure according to claim 1, characterized in that, The main reinforcement is located below the secondary reinforcement.

7. The embedded artificial false bottom arrangement structure according to claim 1, characterized in that, The embedded artificial false bottom layout structure also includes several hanging bars that are perpendicular to the steel mesh and connected to the steel mesh of the previous layer. The lower end of the hanging bar is connected to the intersection of the main and secondary bars of the steel mesh.

8. The embedded artificial false bottom arrangement structure according to claim 7, characterized in that, The mesh size of the steel reinforcement mesh is (250~300)mm×(250~300)mm, the diameter of the main reinforcement is 15~17mm, and the diameter of the secondary reinforcement is 15~17mm.

9. The embedded artificial false bottom arrangement structure according to claim 8, characterized in that, The adjacent suspension rods are spaced 15 to 25 grids apart.

10. The embedded artificial false bottom arrangement structure according to claim 5, characterized in that, The connection method is either binding or welding.

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