Truss structure for supporting roof of coal mine tunnel

Abstract

The invention discloses a coal mine tunnel roof supporting truss structure, and belongs to the technical field of supporting truss.The coal mine tunnel roof supporting truss structure comprises a supporting truss body and a base, the surface of the supporting truss body is fixedly connected with a fixing plate, the inner side of the fixing plate is in bolted connection with a supporting plate, and the supporting plate is attached to the surface of the supporting truss body; a connecting plate is fixedly connected to the lower surface of the supporting truss body, a top plate is fixedly connected to the upper surface of the supporting truss body, an isolation hood is fixedly connected to the interior of the supporting truss body, a fixing block is fixedly connected to the interior of the supporting truss body, and a sliding groove is formed in the fixing block. According to the coal mine tunnel roof support truss structure, the gears rotate to drive the sliding blocks on the lower surfaces of the connecting plates to slide in the moving grooves, so that the width of the device can be adjusted, the universality and adaptability of the device are improved, the device is prevented from being damaged due to extrusion, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of support trusses, and particularly to a support truss structure for the roof of a coal mine roadway. Background Technique

[0002] In China, coal mines are mainly underground mines, and a large number of roadways need to be excavated underground. Roadway support and trusses are of great significance for maintaining the smoothness of roadways and the stability of surrounding rocks, as well as for coal mine construction and production. The basic purpose of roadway support is to relieve and reduce the movement of surrounding rocks, prevent the roadway section from shrinking excessively, and prevent the caving of scattered and damaged surrounding rocks.

[0003] In order to enable the truss to achieve better support work in the roadway, the size of the arched steel members on the truss fits the size of the inner top of the roadway. However, for trusses with matching sizes, it takes a lot of time to adjust the position when installing them in the roadway, and the operation is relatively cumbersome during installation, unable to achieve the effect of rapid installation.

[0004] To overcome the above defects, in the prior art 1 (a Chinese patent with the application number CN202321392259.6 and the application date of June 2, 2023), there is a roadway support truss, a semi-circular truss. The number of the semi-circular trusses is two, and the mutually approaching ends of the semi-circular trusses are in contact. An arc-shaped plate is provided below between the semi-circular trusses. The number of the arc-shaped plates is three. Side plates are movably connected to both ends of the top of the front and back sides of the semi-circular trusses. Insertion holes are drilled at both ends of the side walls of the side plates. Threaded rods are fixed to the side walls of the semi-circular trusses at the positions of the insertion holes. The arched steel member is divided into two semi-circular trusses. After being divided into two semi-circular trusses, the whole component can easily enter the roadway and be installed in the designated support area, not only reducing the time to enter the roadway, but also reducing the installation time during installation, enabling it to achieve rapid installation and carry out support work in the roadway.

[0005] To overcome the above defects, in the prior art 2 (a Chinese patent with the application number CN201510518987.0 and the application date of August 24, 2015), there is a structure in which a truss is combined with a U-shaped steel support structure to support the roadway, which can effectively solve the problem of poor support effect of a single U-shaped steel support and potential safety hazards. It includes a U-shaped steel, a card seat, a hinge joint, a hinge bolt, a chord member, and a web member. The hinge joint at the upper part of the web member is connected to the U-shaped steel through the card seat, and the hinge joint at the lower part of the web member is connected to the chord member through the card seat. It is convenient to use, easy to install, has a good connection effect, occupies a small space in the roadway, can replace and save other unnecessary materials, and brings many conveniences to the safety and production underground.

[0006] To overcome the above-mentioned defects, the prior art 3 (a Chinese patent with the application number CN202211588213.1 and the application date of December 12, 2022) is a concrete-filled steel tube truss support system, including concrete-filled steel tube arch frames. There are multiple concrete-filled steel tube arch frames, which are arc-shaped and arranged at the same interval. The concrete-filled steel tube arch frames are connected by truss connecting rods arranged in parallel or staggered and connecting devices arranged on the side surfaces of the concrete-filled steel tube arch frames; concrete is provided inside the concrete-filled steel tube arch frames; the structural strength can be increased in a timely manner according to the convergence of surrounding rock deformation, and the deformation control of the surrounding rock of the soft rock large deformation tunnel can be achieved.

[0007] When the above device works, the width of the support truss cannot be adjusted, resulting in the support truss not being able to closely fit the roadway wall, and the roof pressure cannot be effectively dispersed, making the support truss unable to accurately play its due supporting role at the predetermined position, causing local imbalance of the support system.

[0008] In view of the above problems, it is urgent to innovate and design on the basis of the original roadway support truss. Summary of the Invention

[0009] The purpose of the present invention is to provide a roof support truss structure for coal mine roadways to solve the problems raised in the above background technology that the width of the support truss cannot be adjusted, resulting in the support truss not being able to closely fit the roadway wall, and the roof pressure cannot be effectively dispersed, making the support truss unable to accurately play its due supporting role at the predetermined position, causing local imbalance of the support system.

[0010] To achieve the above purpose, the present invention provides the following technical solution: a roof support truss structure for coal mine roadways, including a support truss body and a base. A fixing plate is fixedly connected to the surface of the support truss body, and a support plate is bolted to the inner side of the fixing plate. The support plate is in contact with the surface of the support truss body. At the same time, a connecting plate is fixedly connected to the lower surface of the support truss body;

[0011] A roof is fixedly connected to the upper surface of the support truss body, and an isolation cover is fixedly connected to the inside of the support truss body;

[0012] It further includes:

[0013] The support truss body, a fixing block is fixedly connected to the inside of the support truss body, a sliding groove is opened in the fixing block, a sliding plate is slidably connected to the surface of the sliding groove, and a rack is fixedly connected to the inner side of the sliding plate;

[0014] The isolation cover, a rotating shaft is movably connected to the inside of the isolation cover, a gear is fixedly connected to the surface of the rotating shaft, and a hand crank is fixedly connected to the end of the rotating shaft;

[0015] Base, a moving groove is provided inside the base, and a sliding block is movably connected to the surface of the moving groove;

[0016] With the design of the above structure, through the bolt connection between the support truss body and the support plate, the overall strength of the truss body is effectively enhanced, enabling it to better withstand the pressure from the roof and the lateral pressure that appears. At the same time, the deformation of the device caused by stress concentration is reduced, improving the stability of the device. And the isolation cover fixedly connected inside the support truss body can protect the internal components, preventing the erosion and interference of external sundries, dust or groundwater to the internal key components, and extending the working life of the device.

[0017] Preferably, the sliding block is fixedly connected to the lower surface of the connecting plate, and the sliding block slides on the surface of the moving groove;

[0018] With the design of the above structure, by sliding the sliding block on the surface of the moving groove, the device is driven to move in the width direction. And the sliding block can slide flexibly in the moving groove, avoiding stress concentration at a certain fixed point, but distributing the pressure more evenly on the contact surface between the moving groove and the sliding block. Then, the pressure is better conducted to the ground or other support structures through the base, effectively preventing damage to the device or the support structure caused by excessive local pressure, and ensuring the stability of the entire support system.

[0019] Preferably, a fixing column is fixedly connected to the surface of the support truss body, and a connection hole is provided inside the fixing column, and the connection holes are equally spaced on the surface of the fixing column;

[0020] With the design of the above structure, by setting the connection holes inside the fixing column, the possibility of loosening and displacement between components under pressure or external force is reduced, thereby enhancing the stability of the entire support truss structure. And installers can quickly determine the installation positions of components according to the positions and spacings of the connection holes, reducing the debugging time and operation difficulty during the installation process, and improving the installation efficiency.

[0021] Preferably, a connecting rod is movably connected to the upper surface of the fixing column, and a connecting column is movably connected to the rear side of the connecting rod;

[0022] With the design of the above structure, by setting the connecting column, the height of the device can be adjusted. And due to the movable connection between the connecting column and the connecting rod, maintenance personnel can relatively easily disassemble the connecting rod from the fixing column and separate the connecting column from the rear side of the connecting rod for individual component inspection, maintenance or replacement operations, without having to disassemble the entire support truss structure on a large scale, reducing the maintenance cost and repair time, and improving the maintainability of the device.

[0023] Preferably, a first spring is fixedly connected to the front side of the connecting column, and the other end of the first spring is connected to the inner wall of the connecting rod;

[0024] With the design of the above structure, by setting the connection between the first spring and the connecting rod, the deformation of the device caused by stress concentration is reduced, and at the same time, the damage to the components caused by excessive impact force is effectively reduced, prolonging the working life of the device.

[0025] Preferably, an upper protective cover is movably connected to the surface of the support truss body, and a baffle is fixedly connected to the upper surface of the upper protective cover;

[0026] With the design of the above structure, by setting the connection between the upper protective cover and the baffle, the protection of the moving block is improved, and the stress burden on the corresponding part of the support truss body is reduced, thus contributing to maintaining the stability of the entire support truss structure and preventing local deformation or damage.

[0027] Preferably, a lower protective cover is fixedly connected to the surface of the support truss body, and a moving block is movably connected to the front side of the lower protective cover;

[0028] With the design of the above structure, by setting the connection between the lower protective cover and the moving block, the pressure transmitted from the roof will be transmitted and dispersed through components such as the support truss body, enabling the pressure to be more reasonably distributed throughout the device, improving the overall force balance and structural stability of the device.

[0029] Preferably, a sliding column is fixedly connected to the inside of the moving block, a second spring is fixedly connected to the inside of the sliding column, and the other end of the second spring is fixedly connected to a telescopic block;

[0030] With the design of the above structure, by setting the connection between the telescopic block and the second spring, the second spring stores the external force as its own elastic potential energy, thus effectively absorbing and buffering these impact forces, preventing the impact forces from directly being transmitted to other rigid components of the device, greatly reducing the risk of component damage caused by sudden strong impacts, and protecting the stability and integrity of the entire support truss structure.

[0031] Preferably, a card slot is formed inside the lower protective cover, and a spring plate is movably connected to the surface of the card slot;

[0032] With the design of the above structure, by setting the connection between the card slot and the spring plate, the damage to the device caused by vibration is effectively reduced, and the spring plate can absorb and relieve these vibrations, reducing the impact of vibration on the stability of the device, preventing the connection between the components of the device from loosening or the internal precision components from being damaged due to long-term vibration, thus maintaining the normal operation of the device.

[0033] Preferably, a third spring is fixedly connected to the right side of the spring plate, and the other end of the third spring is connected to the inner wall of the lower protective cover;

[0034] With the design of the above structure, by setting the third spring to be connected to the lower protective cover, when the whole structure faces a complex external force environment, it can adaptively adjust the relative position relationship between components, thereby maintaining the relative stability of the overall structure and avoiding the situation of component damage caused by local stress concentration that may be caused by rigid connection.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: The roof support truss structure for coal mine roadways adopts a novel structural design, which can adjust the height and width of the device. In addition, a roof plate is installed on the upper surface of the device, which can directly bear the load from the top of the device, reduce the deformation of the device caused by stress concentration, improve the stability of the device, and the roof plate plays an isolation role, which can effectively block dust, water vapor, falling rock debris and external impurities from entering the device, thereby extending the service life of the device. The specific content is as follows:

[0036] (1) For the roof support truss structure for coal mine roadways, by rotating the gear, the sliding block on the lower surface of the connecting plate slides inside the moving groove, so that the width of the device can be adjusted, improving the versatility of the device, avoiding damage to the device caused by extrusion, and extending the service life of the device;

[0037] Furthermore, the support plate is attached to the surface of the truss body of the support, so that the support plate effectively reduces the stress generated by the device and improves the stability of the device;

[0038] (2) For the roof support truss structure for coal mine roadways, press the connecting column, and at the same time, the first spring is compressed and contracts into the inside of the connecting rod, so that the connecting rod can enter the inside of the fixed column, and the height of the device can be adjusted, improving the working efficiency of the device;

[0039] Furthermore, the entire roadway roof can be evenly and stably supported, reducing the risk of roof collapse caused by excessive local pressure;

[0040] (3) For the roof support truss structure for coal mine roadways, the sliding column and the telescopic block are connected by a second spring, and the second spring will undergo elastic deformation under the action of external force. This elastic deformation can absorb and buffer the external force, reduce the loss of the impact force on the device, and improve the working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the connection structure between the truss body of the support of the present invention and the roof plate;

[0042] Figure 2 It is a schematic diagram of the connection structure between the support plate and the fixed plate of the present invention;

[0043] Figure 3 Schematic diagram of the connection structure between the isolation cover and the rotating shaft of the present invention;

[0044] Figure 4 Schematic diagram of the connection structure between the fixed block and the sliding plate of the present invention;

[0045] Figure 5 Schematic diagram of the connection structure between the base and the sliding block of the present invention;

[0046] Figure 6 Schematic diagram of the connection structure between the rotating shaft and the hand rocker of the present invention;

[0047] Figure 7 Schematic diagram of the connection structure between the connecting column and the first spring of the present invention;

[0048] Figure 8 Schematic diagram of the connection structure between the upper protective cover and the baffle of the present invention;

[0049] Figure 9 Schematic diagram of the connection structure between the sliding column and the moving block of the present invention;

[0050] In the figure: 1, the supporting truss body; 2, the supporting plate; 3, the fixing plate; 4, the fixed block; 5, the sliding plate; 6, the rack; 7, the gear; 8, the hand rocker; 9, the sliding groove; 10, the fixed column; 11, the connecting plate; 12, the sliding block; 13, the moving groove; 14, the base; 15, the connecting rod; 16, the connecting column; 17, the first spring; 18, the connecting hole; 19, the baffle; 20, the upper protective cover; 21, the lower protective cover; 22, the moving block; 23, the sliding column; 24, the second spring; 25, the telescopic block; 26, the clamping groove; 27, the spring plate; 28, the third spring; 29, the top plate; 30, the isolation cover; 31, the rotating shaft. Specific embodiments

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0052] Embodiment 1: By setting the connection of the gear 7, the rotating shaft 31 and the rack 6, the width of the device can be adjusted, improving the working efficiency of the device, as Figures 1 - 6 shown:

[0053] It includes a support truss body 1 and a base 14. A fixing plate 3 is fixedly connected to the surface of the support truss body 1, and a support plate 2 is bolted to the inner side of the fixing plate 3. The support plate 2 is in contact with the surface of the support truss body 1. At the same time, a connecting plate 11 is fixedly connected to the lower surface of the support truss body 1, a top plate 29 is fixedly connected to the upper surface of the support truss body 1, and an isolation cover 30 is fixedly connected inside the support truss body 1;

[0054] It also includes:

[0055] The support truss body 1, a fixing block 4 is fixedly connected inside the support truss body 1. A sliding groove 9 is opened inside the fixing block 4. A sliding plate 5 is slidably connected to the surface of the sliding groove 9. A rack 6 is fixedly connected to the inner side of the sliding plate 5. The isolation cover 30, a rotating shaft 31 is movably connected inside the isolation cover 30. A gear 7 is fixedly connected to the surface of the rotating shaft 31. A hand crank 8 is fixedly connected to the end of the rotating shaft 31. The base 14, a moving groove 13 is opened inside the base 14. A sliding block 12 is movably connected to the surface of the moving groove 13. The sliding block 12 is fixedly connected to the lower surface of the connecting plate 11, and the sliding block 12 slides on the surface of the moving groove 13.

[0056] The fixing plate 3 on the surface of the support truss body 1 is bolted to the support plate 2, and the support plate 2 is in contact with the surface of the support truss body 1, so that the support plate 2 effectively reduces the stress generated by the device and improves the stability of the device. By rotating the gear 7, the sliding block 12 on the lower surface of the connecting plate 11 slides inside the moving groove 13, so that the width of the device can be adjusted, improving the versatility of the device and avoiding damage to the device caused by extrusion, and extending the service life of the device.

[0057] Embodiment 2, in this embodiment, different from Embodiment 1, by setting a connecting rod 15, a first spring 17 and a connecting column 16, the height of the device can be adjusted, improving the working efficiency of the device, as Figure 7 shown:

[0058] A fixing column 10 is fixedly connected to the surface of the support truss body 1. A connecting hole 18 is opened inside the fixing column 10, and the connecting holes 18 are equally spaced on the surface of the fixing column 10. The upper surface of the fixing column 10 is movably connected to a connecting rod 15. The rear side of the connecting rod 15 is movably connected to a connecting column 16. A first spring 17 is fixedly connected to the front side of the connecting column 16, and the other end of the first spring 17 is connected to the inner wall of the connecting rod 15. The upper protective cover 20 is movably connected to the surface of the support truss body 1, and a baffle 19 is fixedly connected to the upper surface of the upper protective cover 20. The lower protective cover 21 is fixedly connected to the surface of the support truss body 1, and a moving block 22 is movably connected to the front side of the lower protective cover 21.

[0059] When the height of the device needs to be adjusted, press the connecting column 16 while the first spring 17 is compressed and contracts into the inside of the connecting rod 15, enabling the connecting rod 15 to enter the inside of the fixed column 10. When the appropriate height is reached, the connecting column 16 springs outwards and engages with the inside of the connecting hole 18, effectively reducing the risk of collapse caused by excessive local pressure, thereby improving the safety and reliability of the device.

[0060] Embodiment 3. In this embodiment, different from Embodiment 2, by setting the connection of the second spring 24, the telescopic block 25 and the second spring 24, the stability of the device is improved, as Figures 8 - 9 shown:

[0061] A sliding column 23 is fixedly connected inside the moving block 22, and a second spring 24 is fixedly connected inside the telescopic block 25, and the other end of the second spring 24 is fixedly connected to the telescopic block 25. A card slot 26 is opened inside the lower protective cover 21, and a spring plate 27 is movably connected to the surface of the card slot 26. A third spring 28 is fixedly connected to the right side of the spring plate 27, and the other end of the third spring 28 is connected to the inner wall of the lower protective cover 21.

[0062] The sliding column 23 fixedly connected inside the moving block 22 and the telescopic block 25 connected to the second spring 24 form a buffer and self-adaptive structural combination. The sliding column 23 and the telescopic block 25 are connected by the second spring 24, and the second spring 24 will undergo elastic deformation under the action of an external force. This elastic deformation can absorb and buffer the external force, preventing the excessive impact force from being directly transmitted to the lower protective cover 21 and the entire device, playing a role in protecting the device from being damaged by a momentary strong external force and improving the stability of the device.

[0063] The above is the working process of the entire device, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A roof support truss structure for a coal mine roadway, comprising a support truss body (1) and a base (14). A fixing plate (3) is fixedly connected to the surface of the support truss body (1), and a support plate (2) is bolted to the inner side of the fixing plate (3). The support plate (2) is in contact with the surface of the support truss body (1). Meanwhile, a connecting plate (11) is fixedly connected to the lower surface of the support truss body (1). A roof plate (29) is fixedly connected to the upper surface of the support truss body (1), and an isolation cover (30) is fixedly connected to the inside of the support truss body (1). Characterized in that, It further includes: A support truss body (1). A fixing block (4) is fixedly connected to the inside of the support truss body (1). A sliding groove (9) is formed in the fixing block (4). A sliding plate (5) is slidably connected to the surface of the sliding groove (9). A rack (6) is fixedly connected to the inner side of the sliding plate (5). An isolation cover (30). A rotating shaft (31) is movably connected to the inside of the isolation cover (30). A gear (7) is fixedly connected to the surface of the rotating shaft (31). A hand crank (8) is fixedly connected to the end of the rotating shaft (31). A base (14). A moving groove (13) is formed in the base (14). A sliding block (12) is movably connected to the surface of the moving groove (13).

2. The roof support truss structure for a coal mine roadway according to claim 1, wherein: The sliding block (12) is fixedly connected to the lower surface of the connecting plate (11), and the sliding block (12) slides on the surface of the moving groove (13).

3. The roof support truss structure for a coal mine roadway according to claim 1, wherein: A fixing column (10) is fixedly connected to the surface of the support truss body (1). A connecting hole (18) is formed in the fixing column (10), and the connecting holes (18) are equally spaced on the surface of the fixing column (10).

4. The roof support truss structure for a coal mine roadway according to claim 3, characterized in that: A connecting rod (15) is movably connected to the upper surface of the fixing column (10), and a connecting column (16) is movably connected to the rear side of the connecting rod (15).

5. A roof support truss structure for a coal mine roadway according to claim 4, characterized in that: A first spring (17) is fixedly connected to the front side of the connecting column (16), and the other end of the first spring (17) is connected to the inner wall of the connecting rod (15).

6. The roof support truss structure for a coal mine roadway according to claim 1, characterized in that: An upper protective cover (20) is movably connected to the surface of the support truss body (1), and a baffle (19) is fixedly connected to the upper surface of the upper protective cover (20).

7. A roof support truss structure for a coal mine roadway according to claim 6, characterized in that: A lower protective cover (21) is fixedly connected to the surface of the support truss body (1), and a moving block (22) is movably connected to the front side of the lower protective cover (21).

8. A roof support truss structure for a coal mine roadway according to claim 7, characterized in that: A sliding column (23) is fixedly connected to the inside of the moving block (22). A second spring (24) is fixedly connected to the inside of the sliding column (23), and the other end of the second spring (24) is fixedly connected to a telescopic block (25).

9. A coal mine roadway roof support truss structure according to claim 7, characterized in that: A clamping groove (26) is formed in the lower protective cover (21), and a spring plate (27) is movably connected to the surface of the clamping groove (26).

10. A roof support truss structure for a coal mine roadway according to claim 9, characterized in that: A third spring (28) is fixedly connected to the right side of the spring plate (27), and the other end of the third spring (28) is connected to the inner wall of the lower protective cover (21).

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