Mine method tunnel assembly type partition wall structure of comprehensive trackside equipment and construction method

Abstract

This invention discloses a prefabricated central partition wall structure and construction method for mining tunnels with integrated trackside equipment, relating to the field of tunnel central partition wall technology. It includes a prefabricated upper partition wall, a first prefabricated lower partition wall, and a second prefabricated lower partition wall with a doorway, all installed within the tunnel. Handholes are provided on the prefabricated upper partition wall, the first prefabricated lower partition wall, and the second prefabricated lower partition wall. The prefabricated upper partition wall is connected vertically to either the first or second prefabricated lower partition wall via these handholes. An upper connection node is provided at the top of the prefabricated upper partition wall. This invention innovatively uses a retractable spun threaded sleeve to leave a gap between the central partition wall and the secondary lining, which restricts the horizontal displacement and rotation of the top of the central partition wall while allowing for vertical displacement. This forms the boundary conditions for the lower fixed end of the upper directional support, ensuring that the central partition wall does not transmit vertical loads. This optimizes the overall stress distribution between the tunnel secondary lining and the central partition wall, making the stress system of the secondary lining structure clearer.

Description

Technical Field

[0001] This invention relates to the field of tunnel partition wall technology, specifically to the prefabricated partition wall structure and construction method for mining tunnels with integrated trackside equipment. Background Technology

[0002] Tunnels are engineering structures buried in the earth's strata. The mining method is one of the ways to construct tunnels. The central partition wall of a mining tunnel is generally constructed using the traditional cast-in-place method.

[0003] However, when using on-site casting construction, the work heavily relies on manual labor for tasks such as rebar tying, formwork and scaffolding installation and dismantling. This results in high labor intensity, long work cycles, and a large occupation of space within the tunnel, which significantly interferes with other construction processes within the tunnel. Furthermore, due to factors such as construction precision and the organization of various processes within the tunnel, it is impossible to reserve conditions for the installation of later equipment on the cast-in-place partition wall. Consequently, trackside equipment such as integrated pipelines, evacuation platforms, and contact wires within the tunnel are often installed using post-installed anchor bolts, resulting in poor controllability of construction quality and precision, and low work efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated central partition wall structure and construction method for integrated trackside equipment in mining tunnels, which solves the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A prefabricated central partition wall structure for mining tunnels with integrated trackside equipment includes a prefabricated upper partition wall, a first prefabricated lower partition wall, and a second prefabricated lower partition wall with a doorway, all installed within the tunnel. Handholes are provided on the prefabricated upper partition wall, the first prefabricated lower partition wall, and the second prefabricated lower partition wall. The prefabricated upper partition wall is connected vertically to either the first or second prefabricated lower partition wall via these handholes. The vertical connections between the prefabricated upper and lower partition walls, as well as between the prefabricated upper and lower partition walls, form a central partition wall. An upper connection node is provided at the top of the prefabricated upper partition wall, embedded in the top of the tunnel. Lower connection nodes are provided at the bottom of both the first and second prefabricated lower partition walls, embedded in the bottom of the tunnel. Contact wire supports and evacuation platforms are provided on the side walls of the central partition wall. The tunnel is provided with a secondary lining at the top, and an arched groove is formed in the secondary lining. The upper connecting node is embedded in the arched groove, and the prefabricated upper partition wall is fixed in the arched groove by threaded connectors. The width of the arched groove is greater than the thickness of the prefabricated upper partition wall.

[0006] As a preferred embodiment of the present invention, the threaded connector includes a bolt, a reserved bolt sleeve and a retractable spun threaded sleeve. The reserved bolt sleeve is disposed on the top of the prefabricated upper partition wall, and the bolt passes through the retractable spun threaded sleeve and is connected to the reserved bolt sleeve.

[0007] As a preferred embodiment of the present invention, the second prefabricated lower partition wall includes a partition wall body, a connecting doorway, and a reinforcing ring beam. The connecting doorway is opened on the partition wall body, and the reinforcing ring beam is arranged around the connecting doorway.

[0008] In a preferred embodiment of the present invention, the bottom of the first prefabricated lower partition wall and the second prefabricated lower partition wall have toes, and the specific calculation formula for the toe width L is as follows: Where Ft represents the overturning stability coefficient of the central partition wall; G represents the self-weight; Ea represents the wind pressure; L represents the toe width; z represents the vertical distance from the point of application of the resultant wind pressure force to the heel of the wall; and x represents the horizontal distance from the center of the central partition wall to the toe.

[0009] As a preferred embodiment of the present invention, the bottom of the tunnel is provided with an invert backfill layer, and a backfill groove is provided on the invert backfill layer, and the width of the backfill groove is greater than the toe width L. The toes of the first precast lower partition wall and the second precast lower partition wall are fixed to the backfill groove by self-compacting concrete and post-cast micro-expansion concrete to form a lower connection node.

[0010] As a preferred embodiment of the present invention, the adjacent partition walls are connected by a tongue and groove tenon joint.

[0011] As a preferred embodiment of the present invention, the central partition wall is provided with channels for installing contact wire supports and anchor bolts for installing evacuation platforms.

[0012] The construction method for prefabricated central partition wall structure in mining tunnels with integrated trackside equipment includes the following steps: S1. In the process of tunnel construction using the mining method, after the tunnel is excavated, the initial support structure is constructed first. After the deformation of the initial support structure stabilizes, the secondary lining is constructed on the inner edge of the initial support structure. An arch top groove is left at the secondary lining, and a backfill layer groove is left when the invert arch backfill layer is poured. S2, following the bottom-up principle, first install the first prefabricated lower partition wall and the second prefabricated lower partition wall, and then construct the lower connection nodes; S3, install the prefabricated upper partition wall, and connect the prefabricated upper partition wall to the first prefabricated lower partition wall or the second prefabricated lower partition wall through the handhole connection; S4, Install the upper connection node between the precast upper partition wall and the secondary lining; S5, continue installing the adjacent partition walls until construction is complete.

[0013] Compared with the prior art, the present invention has the following advantages: (1) This invention innovatively leaves a gap between the central partition wall and the secondary lining by using a retractable spun threaded sleeve, which not only restricts the horizontal displacement and rotation of the top of the central partition wall, but also leaves the conditions for vertical displacement, forming the boundary conditions of the lower fixed end of the upper directional support, that is, the structural form in which the upper and lower ends of the central partition wall are connected to the tunnel secondary lining, so that the central partition wall does not transmit vertical loads, optimizes the overall stress distribution of the tunnel secondary lining and the central partition wall, and makes the stress system of the secondary lining structure clearer.

[0014] (2) The present invention adopts a factory processing and in-tunnel assembly operation mode for the central partition wall, which results in high component manufacturing quality, short construction cycle and little interference with tunnel face construction; (3) In this invention, the lower part of the partition wall adopts a "tree planting" node to avoid the problem of the reserved sleeve or anchor bar affecting the later installation accuracy. It has strong positioning fault tolerance and high construction reliability; it has high integration, high tunnel equipment installation efficiency and controllable quality. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a standard section cross-sectional view of a prefabricated central partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 2 This is a standard section elevation view of a prefabricated central partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 3 This is a cross-sectional view of the connecting portal section of a prefabricated partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 4 This is an elevation view of the connecting portal section of a prefabricated central partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 5 This is a detailed drawing of the upper connection node of the prefabricated partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 6 yes Figure 5 Cross-sectional view at point AA; Figure 7 yes Figure 5 Cross-sectional view at point BB; Figure 8 This is a detailed drawing of the lower connection node of the prefabricated partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 9 This is a longitudinal connection node diagram of a prefabricated central partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by the present invention. Figure 10 This is a simplified stress analysis diagram of the prefabricated central partition wall structure for a mining tunnel, which is part of an integrated trackside equipment provided by this invention. Figure 11 This is a cross-sectional view of the trackside equipment installation in a prefabricated partition wall structure for a mining tunnel, provided by the present invention. Figure 12 This invention provides a pre-embedded diagram of the equipment on both sides of the central partition wall in a prefabricated central partition wall structure for integrated trackside equipment in a mining tunnel. Figure 13 This is a flowchart of a construction method for a prefabricated central partition wall structure for a mining tunnel, which is part of an integrated trackside equipment, provided by the present invention.

[0017] The labels in the diagram represent the following: 1. Upper connection node; 2. Precast upper partition wall; 3. First precast lower partition wall; 4. Lower connection node; 5. Initial support structure; 6. Secondary lining; 7. Second precast lower partition wall; 8. Backfill layer of invert arch; 9. Contact wire support; 10. Evacuation platform; 11. Arch top groove; 12. Bolt; 13. Telescopic spun threaded sleeve; 21. Reserved bolt sleeve; 31. Hand hole; 32. Tongue and groove; 33. Longitudinal tension bar; 41. Backfill layer groove; 42. Post-cast micro-expansion concrete; 43. Self-compacting concrete; 71. Connecting doorway; 72. Reinforcing ring beam; 91. Channel; 101. Anchor bolt. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 13 As shown, the present invention provides a prefabricated central partition wall structure for mining tunnels with integrated trackside equipment, including a prefabricated upper partition wall 2, a first prefabricated lower partition wall 3, and a second prefabricated lower partition wall 7 with a doorway, all installed inside the tunnel. Each of the prefabricated upper partition wall 2, the first prefabricated lower partition wall 3, and the second prefabricated lower partition wall 7 has a manhole 31. The prefabricated upper partition wall 2 is vertically connected to either the first prefabricated lower partition wall 3 or the second prefabricated lower partition wall 7 through the manhole 31. The vertical connection between the prefabricated upper partition wall 2 and the first prefabricated lower partition wall 3, as well as the vertical connection between the prefabricated upper partition wall 2 and the second prefabricated lower partition wall 7, forms a central partition wall. The top of the prefabricated upper partition wall 2 has an upper connecting node 1, which is embedded in the top of the tunnel. The bottom of both the first prefabricated lower partition wall 3 and the second prefabricated lower partition wall 7 has a lower connecting node 4, which is embedded in the bottom of the tunnel. A contact wire support 9 and an evacuation platform 10 are installed on the sidewall of the central partition wall.

[0021] The tunnel is equipped with a secondary lining 6 at the top, and an arched groove 11 is provided in the secondary lining 6. The upper connecting node 1 is embedded in the arched groove 11. The precast upper partition wall 2 is fixed in the arched groove 11 by threaded connectors. The width of the arched groove 11 is greater than the thickness of the precast upper partition wall 2.

[0022] The threaded connector includes a bolt 12, a reserved bolt sleeve 21, and a retractable spun threaded sleeve 13. The reserved bolt sleeve 21 is set on the top of the prefabricated upper partition wall 2. The bolt 12 passes through the retractable spun threaded sleeve 13 and is connected to the reserved bolt sleeve 21.

[0023] The second prefabricated lower partition wall 7 includes a partition wall body, a connecting doorway 71, and a reinforcing ring beam 72. The connecting doorway 71 is opened on the partition wall body, and the reinforcing ring beam 72 is arranged around the connecting doorway 71.

[0024] The bottom of the first prefabricated lower partition wall 3 and the second prefabricated lower partition wall 7 has toes, and the specific calculation formula for the width L of the toes is as follows: Among them, F t The value represents the overturning stability coefficient of the central partition wall; G represents the self-weight; Ea represents the wind pressure; L represents the toe width; z represents the vertical distance from the point of application of the resultant wind pressure force to the heel of the wall; and x represents the horizontal distance from the center of the central partition wall to the toe.

[0025] The bottom of the tunnel is provided with an invert backfill layer 8, and a backfill groove 41 is provided on the invert backfill layer 8. The width of the backfill groove 41 is greater than the width of the toe L. The toes of the first precast lower partition wall 3 and the second precast lower partition wall 7 are fixed to the backfill groove 41 by self-compacting concrete 43 and post-cast micro-expansion concrete 42 and form the lower connection node 4.

[0026] Adjacent partition walls are connected by tenon and mortise joints 32.

[0027] The central partition wall is provided with a channel 91 for installing the contact wire bracket 9 and an anchor bolt 101 for installing the evacuation platform 10.

[0028] In practical application, the prefabricated upper partition wall 2, the first prefabricated lower partition wall 3, and the second prefabricated lower partition wall 7 can be arranged as a whole or in sections. That is, the prefabricated upper partition wall 2 can be spliced ​​together with the first prefabricated lower partition wall 3 or the second prefabricated lower partition wall 7 to form a whole before arrangement, or they can be arranged separately. In actual construction, a second prefabricated lower partition wall 7 is generally installed every 200 meters. When adopting the section arrangement, the dimensions of the prefabricated upper partition wall 2, the first prefabricated lower partition wall 3, and the second prefabricated lower partition wall 7 should be comprehensively determined based on the section quality, tooling level, and stress characteristics.

[0029] During installation, the first precast lower partition wall 3 and the second precast lower partition wall 7 are installed first, and the first precast lower partition wall 3 and the second precast lower partition wall 7 are fixed by constructing the lower connection node 4. Specifically, the bottom toes of the first precast lower partition wall 3 and the second precast lower partition wall 7 are placed in the backfill layer groove 41, and then the first precast lower partition wall 3 and the second precast lower partition wall 7 are fixed by self-compacting concrete 43 and post-cast micro-expansion concrete 42. The inner contour concrete of the backfill layer groove 41 is roughened and an interface agent is applied to ensure that the post-cast micro-expansion concrete 42 is well connected with the invert arch backfill layer 8. The backfill layer groove 41, the post-cast micro-expansion concrete 42 and the self-compacting concrete 43 together form the lower connection node 4.

[0030] Among them, through the formula It can be seen that the toe width L of the first prefabricated lower partition wall 3 and the second prefabricated lower partition wall 7 can be calculated.

[0031] When installing the precast upper partition wall 2, the precast upper partition wall 2, the first precast lower partition wall 3, and the second precast lower partition wall 7 are connected through the handhole 31, and then the precast upper partition wall 2 is fixed. Since the width of the precast upper partition wall 2 and the arch groove 11 are inconsistent, that is, the precast upper partition wall 2 and the side wall of the arch groove 11 are left with a gap, ensuring that the vertical load is not transmitted, which can effectively optimize the overall stress of the secondary lining and the middle partition wall. Specifically, the precast upper partition wall 2 is fixed through the upper connection node 1.

[0032] In this embodiment, the alternating arrangement of handholes 31 means that two handholes 31 are provided on the prefabricated upper partition wall 2, and the two handholes 31 are respectively located on both sides of the prefabricated upper partition wall 2. Similarly, the handholes 31 on the first prefabricated lower partition wall 3 and the second prefabricated lower partition wall 7 are also arranged in this way. The handholes 31 are used to facilitate the installation of the prefabricated upper partition wall 2, the first prefabricated lower partition wall 3 and the second prefabricated lower partition wall 7, and then sealed with cement mortar to keep the side of the partition wall smooth.

[0033] During the construction of the upper connection node 1, the top of the prefabricated upper partition wall 2 is placed in the arch groove 11. Then, the bolt 12 passes through the retractable spun threaded sleeve 13 and is connected to the reserved bolt sleeve 21. The retractable spun threaded sleeve 13 is fixed to the prefabricated upper partition wall 2. The retractable spun threaded sleeve 13 fills the excess pores in the arch groove 11 of the secondary lining 6 through its lateral elastic deformation capacity, so as to facilitate the installation of the prefabricated upper partition wall 2 and have a certain unloading capacity. The retractable spun threaded sleeve 13 consists of a threaded sleeve and a compression spring. The threaded sleeve is fixed to the prefabricated upper partition wall 2 by bolt 12 and is used to adjust the height of the retractable spun threaded sleeve 13 to adjust the distance between it and the arch groove 11, so as to ensure the stability of the middle partition wall during installation. The compression spring is set on one side of the threaded sleeve. Through its compression with the arch groove 11, the sealing between the middle partition wall and the arch groove 11 is ensured.

[0034] In this embodiment, adjacent partition walls of the same type are generally connected by tongue and groove tenon 32. If necessary, longitudinal tension ribs 33 can be added for tensioning to improve the stability of the connection.

[0035] In this embodiment, the specific fixing method of the prefabricated upper partition wall 2, the first prefabricated lower partition wall 3, and the second prefabricated lower partition wall 7 is as follows: the prefabricated upper partition wall 2, the first prefabricated lower partition wall 3, and the second prefabricated lower partition wall 7 are fixed by special curved bolts through the handhole 31, and then sealed with micro-expansion cement mortar, which can prevent the curved bolts from rusting and can also bear vibration loads to prevent the curved bolts from loosening.

[0036] The evacuation platform 10 and the contact wire support 9 are trackside equipment. In this embodiment, the reserved channel 91 is for use when the anchor bolt model used requires the base material thickness to be less than the thickness of the middle partition wall. In this case, the reserved channel 91 is required.

[0037] In this embodiment, the evacuation platform 10 includes integrated pipelines. When the type of anchor used requires the base material thickness to be less than the thickness of the partition wall, anchor bolt 101 needs to be installed.

[0038] In this application Figure 5 This is a schematic diagram of the connection between two adjacent partition walls, that is, the longitudinal connection node formed by the interlocking of the tenon and mortise joints 32. Figure 6 This is a simplified diagram for calculating toe width, and a graphical explanation of the calculation formula.

[0039] Compared to existing technologies that connect precast partitions using fixing bolts and anchors, prefabricated tunnels require high precision in the pre-drilled bolt holes. However, for cast-in-place structures, most of the pre-drilled fixing bolts or anchors tend to be misaligned, leading to difficulties in subsequent installation. This results in inconsistent longitudinal assembly quality of the precast partition walls, potentially causing gaps in the joints. Furthermore, the bottom of the precast partition walls sits on pre-backfilled concrete surfaces, and inconsistent backfill heights can affect the installation quality. In this application, the partition walls have no pre-embedded parts or pre-cast surfaces at the top and bottom; they are fixed during installation, thus avoiding the problems present in existing technologies.

[0040] exist Figure 5 In the diagram, t represents the thickness of the central partition wall, and w represents the width of the arched recess 11. Figure 8 In this context, d represents the width of the central partition wall.

[0041] like Figure 8 As shown, the present invention also provides a construction method for a prefabricated central partition wall structure in a mining tunnel for integrated trackside equipment, specifically including the following steps: S1. During the construction of the tunnel using the mining method, after the tunnel is excavated, the initial support structure 5 is constructed first. After the initial support structure 5 has been deformed and stabilized, the secondary lining 6 is constructed on the inner edge of the initial support structure 5. The arch top groove 11 is left at the secondary lining 6, and the backfill layer groove 41 is left when the invert arch backfill layer 8 is poured. S2, following the principle of bottom-up, first install the first prefabricated lower partition wall 3 and the second prefabricated lower partition wall 7, and then construct the lower connection node 4; S3, install the prefabricated upper partition wall 2, and connect the prefabricated upper partition wall 2 to the first prefabricated lower partition wall 3 or the second prefabricated lower partition wall 7 through the handhole 31; S4, Install the upper connection node 1 at the location of the precast upper partition wall 2 and the secondary lining 6; S5, continue installing the adjacent partition walls until construction is complete.

[0042] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0043] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A prefabricated central partition wall structure for mining tunnels with integrated trackside equipment, characterized in that, The system includes a prefabricated upper partition wall (2), a first prefabricated lower partition wall (3), and a second prefabricated lower partition wall (7) with a doorway, all installed within the tunnel. Each of the prefabricated upper partition wall (2), the first prefabricated lower partition wall (3), and the second prefabricated lower partition wall (7) is equipped with a handhole (31). The prefabricated upper partition wall (2) is vertically connected to either the first prefabricated lower partition wall (3) or the second prefabricated lower partition wall (7) via the handhole (31). Furthermore, the prefabricated upper partition wall (2) and the first prefabricated lower partition wall (3) are vertically connected and prefabricated. The upper partition wall (2) and the second prefabricated lower partition wall (7) are connected vertically to form a middle partition wall. The top of the prefabricated upper partition wall (2) is provided with an upper connection node (1), and the upper connection node (1) is embedded in the top of the tunnel. The bottom of the first prefabricated lower partition wall (3) and the second prefabricated lower partition wall (7) are provided with lower connection nodes (4), and the lower connection nodes (4) are embedded in the bottom of the tunnel. The side wall of the middle partition wall is provided with a contact wire bracket (9) and an evacuation platform (10). The top of the tunnel is provided with a secondary lining (6), and an arched groove (11) is provided in the secondary lining (6). The upper connecting node (1) is embedded in the arched groove (11), and the prefabricated upper partition wall (2) is fixed in the arched groove (11) by a threaded connector. The width of the arched groove (11) is greater than the thickness of the prefabricated upper partition wall (2). The threaded connector includes a bolt (12), a reserved bolt sleeve (21), and a retractable spun threaded sleeve (13). The reserved bolt sleeve (21) is set on the top of the prefabricated upper partition wall (2). The bolt (12) passes through the retractable spun threaded sleeve (13) and is connected to the reserved bolt sleeve (21). The bottom of the tunnel is provided with an inverted arch backfill layer (8), and a backfill layer groove (41) is provided on the inverted arch backfill layer (8). The width of the backfill layer groove (41) is greater than the width of the toe L. The toes of the first precast lower partition wall (3) and the second precast lower partition wall (7) are fixed to the backfill layer groove (41) by self-compacting concrete (43) and post-cast micro-expansion concrete (42) and form a lower connection node (4). By using a retractable spun threaded sleeve (13) to leave a gap between the partition wall and the secondary lining (6), the horizontal displacement and rotation of the top of the partition wall are restricted, while the conditions for vertical displacement are left, forming the boundary conditions of the lower fixed end of the upper directional support, so that the partition wall does not transmit vertical loads.

2. The prefabricated central partition wall structure for mining tunnels of integrated trackside equipment according to claim 1, characterized in that, The second prefabricated lower partition wall (7) includes a partition wall body, a connecting doorway (71) and a reinforcing ring beam (72). The connecting doorway (71) is opened on the partition wall body, and the reinforcing ring beam (72) is arranged around the connecting doorway (71).

3. The prefabricated central partition wall structure for mining tunnels of integrated trackside equipment according to claim 1, characterized in that, The bottom of the first prefabricated lower partition wall (3) and the second prefabricated lower partition wall (7) has toes, and the specific calculation formula for the width L of the toes is as follows: Among them, F t G represents the overturning stability coefficient of the central partition wall; E represents the self-weight. a L represents the wind pressure, Z represents the toe width, Z represents the vertical distance from the point of application of the resultant wind pressure force to the heel of the wall, and X represents the horizontal distance from the center of the partition wall to the toe.

4. The prefabricated central partition wall structure for mining tunnels of integrated trackside equipment according to claim 1, characterized in that, The adjacent partition walls are connected by tenons (32).

5. The prefabricated central partition wall structure for mining tunnels of integrated trackside equipment according to claim 1, characterized in that, The central partition wall is provided with a channel (91) for installing the contact wire support (9) and an anchor bolt (101) for installing the evacuation platform (10).

6. A construction method for the prefabricated central partition wall structure in mining tunnels as described in any one of claims 1-5, characterized in that, The specific steps include: S1. During the construction of the tunnel using the mining method, after the tunnel is excavated, the initial support structure (5) is constructed first. After the initial support structure (5) has been deformed and stabilized, the secondary lining (6) is constructed on the inner edge of the initial support structure (5). The arch top groove (11) is left at the secondary lining (6), and the backfill layer groove (41) is left when the invert arch backfill layer (8) is poured. S2, following the principle of bottom-up, first install the first prefabricated lower partition wall (3) and the second prefabricated lower partition wall (7), and construct the lower connection node (4). S3, install the prefabricated upper partition wall (2), and connect the prefabricated upper partition wall (2) to the first prefabricated lower partition wall (3) or the second prefabricated lower partition wall (7) through the handhole (31); S4, Install the upper connection node (1) between the prefabricated upper partition wall (2) and the secondary lining (6); S5, continue installing the adjacent partition walls until construction is complete.

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