Artificial false bottom of thin vein stope

Abstract

The utility model relates to the technical field of underground metal mining, in particular to a thin vein stope artificial false bottom which comprises a top plate and an artificial false bottom body, a roadway is arranged in the top plate, a bottom plate is arranged at the bottom of the roadway and connected with supporting columns in a welded mode, and a reinforcing mesh is arranged above the supporting columns and comprises at least two sets of longitudinal ribs and web ribs. The reinforcing mesh is formed by arranging longitudinal ribs and web ribs in a staggered and overlapped mode, the intersection points of the longitudinal ribs and the web ribs are connected, and concrete is poured into the reinforcing mesh and around the reinforcing mesh. According to the artificial false bottom of the thin vein stope, the longitudinal ribs and the web ribs are arranged in a staggered and overlapped mode to form the reinforcing mesh, the concrete is poured into the reinforcing mesh and around the reinforcing mesh, the structural integrity and stability of the artificial false bottom of the thin vein stope are remarkably enhanced, the supporting columns are connected to the upper portion of the bottom plate in a welded mode, and the bearing capacity of the artificial false bottom is improved; and deformation and damage of surrounding rock of the roadway are effectively resisted, and safe operation of mining operation is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to underground metal mine exploitation technical field, concretely relates to a kind of thin lode stope artificial false floor. BACKGROUND

[0002] In underground metal mine exploitation, the thickness of lode is thin, artificial false floor can reduce the reservation and recovery work in the process of mining, so as to improve production efficiency, artificial false floor is usually set in the mining preparation roadway, which is composed of internal framework and functional filler, the internal framework mainly includes upper reinforcement mesh, lower reinforcement mesh and composite beam arranged between the two, to enhance the bearing capacity and stability of the false floor, the functional filler is usually made of foam concrete, toughened polypropylene synthetic fiber and other materials, to fill the internal framework and form a complete false floor structure.

[0003] Through the search, the utility model patent with Chinese patent number CN211230542U discloses an artificial false floor, which is inserted into the side plate anchor rod and the artificial false floor body between the side plates, so that the artificial false floor and the side plate are integrated, which can support the mine site, without the need to reserve the top and bottom ore pillar, and without the need to recover the top and bottom ore pillar in the later stage, saving the process, the artificial false floor is poured with concrete, when mining the ore above the artificial false floor, the artificial false floor will not mix with the ore, the waste rock mixing rate is low, so that the mineral recovery rate is high, and the economic benefit is good.

[0004] However, in the actual use process of the above-mentioned device, the longitudinal steel bars are connected into a whole structure by longitudinal connecting bars, which increases the amount and cost of steel bars, and the economy and energy saving are poor. UTILITY MODEL CONTENT

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a thin lode stope artificial false floor, which can effectively solve the problem of increasing the amount of steel bars caused by connecting longitudinal steel bars into a whole structure by longitudinal connecting bars.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions:

[0007] The utility model provides a thin lode stope artificial false floor, which comprises a roof and an artificial false floor body, the roof is internally provided with a roadway, the bottom of the roadway is provided with a floor, the floor is welded and connected with a support column, the support column is provided above with a reinforcement mesh, the reinforcement mesh comprises at least two groups of longitudinal bars and web bars, the reinforcement mesh is formed by staggered and superposed arrangement of longitudinal bars and web bars, the intersection of longitudinal bars and web bars is connected, and the inside and periphery of the reinforcement mesh are poured with concrete.

[0008] Further, the diameter and the mesh of the steel bars of the group of the steel mesh close to the bottom plate are greater than those of the other group of the steel mesh.

[0009] Further, the number of the longitudinal bars is three, and the three longitudinal bars are connected by the web bars to form a triangular net rack structure.

[0010] Further, the number of the longitudinal bars is four, and the four longitudinal bars are connected by the web bars to form a rectangular net rack structure, and the rectangular net rack structure is supported and fixed by the lateral bars on the outside.

[0011] Further, the artificial false bottom body comprises anchor rods, the anchor rods are arranged at an angle between the side plates, and the angle between the axis of the anchor rod and the profile surface of the roadway is not less than 75°.

[0012] Further, the support columns are provided in multiple groups and are uniformly distributed, and the support columns are bound and connected with the steel mesh.

[0013] Further, the artificial false bottom body is fixed in the roadway surrounding rock by the connecting pieces, and is integrated with the roadway surrounding rock.

[0014] Beneficial effects

[0015] Compared with the prior art, the technical scheme of the artificial false bottom provided by the utility model has the following beneficial effects:

[0016] Firstly, the steel mesh formed by the longitudinal bars and the web bars staggered and superposed is arranged, and the concrete is poured in the steel mesh and around the steel mesh, so that the artificial false bottom of the thin vein stope significantly enhances the integrity and stability of the structure, the support column is welded and connected above the bottom plate, the bearing capacity of the artificial false bottom is improved, the deformation and damage of the roadway surrounding rock are effectively resisted, and the safety of the mining operation is ensured.

[0017] Secondly, the artificial false bottom significantly enhances the stability and bearing capacity of the structure by adopting the triangular and rectangular combined steel mesh structure and the multiple groups of uniformly distributed support columns, the triangular net rack structure can uniformly distribute external force and avoid local stress concentration, the rectangular net rack structure improves the overall bearing capacity by increasing the number of longitudinal bars and lateral bars, the deformation and damage caused by the geological stress are reduced, and the safety in the stoping process is improved.

[0018] Thirdly, the prefabrication and on-site assembly of the steel mesh are convenient and fast, the uniform distribution of the support columns is also convenient for relevant personnel to maintain and check, in addition, the artificial false bottom body and the roadway surrounding rock are fixed as a whole by the connecting pieces, the overall stability of the structure is improved, the supporting operation is simplified, the labor intensity is reduced, and the safety of the mining operation is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 A structural schematic diagram of a thin vein stope artificial false floor is proposed for the present application.

[0021] Figure 2 A web belt structure sectional schematic diagram is proposed for the present application.

[0022] Figure 3 A triangular net rack structure sectional schematic diagram is proposed for the present application.

[0023] Figure 4 A rectangular net rack structure sectional schematic diagram is proposed for the present application.

[0024] The drawings are as follows: 1, top plate; 2, side plate; 3, anchor rod; 4, concrete; 5, artificial false floor body; 6, longitudinal reinforcement; 7, transverse reinforcement; 8, web reinforcement; 9, support column; 10, bottom plate; 11, connecting piece; 12, steel mesh; 13, roadway. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0026] The present application will be further described below in combination with the embodiments.

[0027] A thin vein stope artificial false floor, referring to the drawings of the present application, Figures 1-4, including the top plate 1 and the artificial false bottom body 5, the inside of the top plate 1 is provided with a roadway 13, the bottom of the roadway 13 is provided with a bottom plate 10, the diameter of the steel bars of a group of steel mesh 12 close to the bottom plate 10 is greater than that of another group of steel mesh 12, and the mesh degree of the steel mesh 12 close to the bottom plate 10 is greater than that of the other group of steel mesh 12, at the position close to the bottom plate 10, due to the direct contact with the bottom plate 10 of the roadway 13, the geological stress and deformation received may be more significant, the use of steel mesh 12 with larger diameter and higher mesh degree can enhance the stability of the area, reduce the deformation and damage caused by geological stress, the bottom plate 10 is welded with a support column 9, the support column 9 is provided with a steel mesh 12 above, the steel mesh 12 includes at least two groups of longitudinal bars 6 and web bars 8, the steel mesh 12 is formed by the staggered arrangement of the longitudinal bars 6 and the web bars 8, the intersection of the longitudinal bars 6 and the web bars 8 is connected, the inside and the periphery of the steel mesh 12 are poured with concrete 4, the artificial concrete bottom is laid every 10 meters of mining height, the thickness is about 20 centimeters, which not only can support the surrounding rock and control the deformation and falling of the surrounding rock, but also can reduce the relaxation coefficient of the surrounding rock and the stress concentration degree of the roof in the mining working area, and improve the safety in the mining process.

[0028] In the above technical solution, the number of longitudinal bars 6 is three, and the three longitudinal bars 6 are connected by web bars 8 to form a triangular grid structure, in the triangular grid structure, since the three vertices of the triangle, i.e. the end points of the longitudinal bars 6, are uniformly distributed, external forces can be more evenly distributed on the entire structure, avoiding the problem of local stress concentration, increasing the load-carrying capacity, at the same time, the triangular grid structure is relatively simple in structure, the construction process is easy to control, which is conducive to improving the construction efficiency, the number of longitudinal bars 6 is four, and the four longitudinal bars 6 are connected by web bars 8 to form a grid structure with a rectangular cross section, and are supported and fixed on the outside by transverse bars 7, the rectangular grid structure significantly improves the load-carrying capacity of the entire structure by increasing the number of longitudinal bars 6 and supporting and fixing on the outside by transverse bars 7, further increasing the load-carrying capacity, in addition, the rectangular grid structure has more support points and connection points, which can effectively absorb and disperse seismic energy, improving the seismic performance of the structure.

[0029] In addition, the artificial false bottom body 5 includes anchor rods 3, the anchor rods 3 are arranged at an angle between the side plates 2, and the angle between the axis of the anchor rods 3 and the profile surface of the roadway 13 is not less than 75°, when the surrounding rock is blocky or broken rock, in order to ensure that the anchor rods 3 can penetrate into the stable rock layer and provide sufficient supporting force, the angle between the axis of the anchor rods 3 and the profile surface of the roadway 13 should be greater than or equal to 75°, an oxidation coating is coated on the surface of the anchor rods 3 for corrosion prevention, which can isolate the contact between the corrosion medium and the anchor rod matrix, thereby slowing down the corrosion process.

[0030] Further, the support columns 9 are provided in multiple groups and are uniformly distributed, the support columns 9 are bound and connected with the steel mesh 12, the uniform distribution of the support columns 9 makes it easier for relevant personnel to maintain and inspect them, ensuring the long-term stability and safety of the structure.

[0031] Further, the artificial false bottom body 5 is fixed in the roadway 13 surrounding rock through the connecting piece 11, and is integrated with the roadway 13 surrounding rock, and through the overall structure, the stability of the whole roadway 13 can be significantly improved, which helps to prevent the loosening, collapse and other adverse conditions of the roadway 13 surrounding rock, and ensures the safe operation of the mining operation.

[0032] Working principle: when in use, the anchor rod 3 provides support force by penetrating into the stable rock stratum, and combines with multiple groups of uniformly distributed support columns 9 and different structure of steel mesh 12 (including triangular and rectangular net rack structure) to form an overall reinforcement system, the inside and around of the steel mesh 12 is poured with concrete 4 to enhance the stability and bearing capacity of the structure, at the same time, the artificial false bottom body 5 is tightly fixed with the roadway 13 surrounding rock by the connecting piece 11, forming a stable overall structure, thereby effectively supporting the surrounding rock, controlling the deformation, reducing the surrounding rock relaxation coefficient and roof stress concentration degree, and improving the safety of the mining operation.

[0033] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A false floor for a thin vein mine, comprising a roof (1) and a false floor body (5), characterised in that, The roof (1) is internally provided with a roadway (13), the bottom of the roadway (13) is provided with a bottom plate (10), the bottom plate (10) is welded with a support column (9), the support column (9) is provided with a steel mesh (12) above, the steel mesh (12) includes at least two groups of longitudinal reinforcement (6) and web reinforcement (8), the steel mesh (12) is formed by the staggered superposition arrangement of the longitudinal reinforcement (6) and the web reinforcement (8), the intersection of the longitudinal reinforcement (6) and the web reinforcement (8) is connected, and the inside and the periphery of the steel mesh (12) are poured with concrete (4). The number of the longitudinal reinforcement (6) is three, and the three longitudinal reinforcement (6) are connected by the web reinforcement (8) to form a triangular net rack structure.

2. A false floor for a thin lode mine according to claim 1, characterised in that, The diameter and the mesh degree of the steel of one group of the steel mesh (12) near the bottom plate (10) are greater than those of the other group of the steel mesh (12).

3. A false floor for a thin lode mine according to claim 1, characterised in that, The number of the longitudinal reinforcement (6) is four, and the four longitudinal reinforcement (6) are connected by the web reinforcement (8) to form a rectangular net rack structure, and are supported and fixed by the transverse reinforcement (7) on the outside.

4. A false floor for a thin lode mine according to claim 1, characterised in that, The artificial false bottom body (5) includes an anchor rod (3), the anchor rod (3) and the side plate (2) are arranged at an angle, and the angle between the axis of the anchor rod (3) and the profile surface of the roadway (13) is not less than 75°.

5. A false floor for a thin lode mine according to claim 1, characterised in that, The support column (9) is provided with multiple groups and is uniformly distributed, and the support column (9) is bound with the steel mesh (12).

6. A false floor for a thin lode mine according to claim 1, characterised in that, The artificial false bottom body (5) is fixed in the surrounding rock of the roadway (13) by the connecting piece (11) and is integrated with the surrounding rock of the roadway (13).

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