Coal mine roadway safety support system

Abstract

This invention relates to the field of coal mine roadway support technology, specifically to a coal mine roadway safety support system, including a support assembly, a drive assembly, and a face protection unit. In the support assembly, the front and rear support frames are slidably engaged via support members. The drive assembly uses a motor-driven screw block to achieve alternating spring energy storage, combined with a support hydraulic cylinder to control the support frame state switching. Spring energy release drives the frame movement. The controller receives data from the tunneling machine and scraper conveyor, controlling the front and rear support frames to move forward alternately, with the face protection unit providing follow-up protection. This system achieves coordinated operation with the tunneling machine and scraper conveyor, improving the efficiency of following the machine for support movement, reducing the risk of unsupported roofs, and ensuring roadway support safety.

Description

Technical Field

[0001] This invention relates to the field of coal mine roadway support technology, specifically to a coal mine roadway safety support system. Background Technology

[0002] Coal mine roadway safety support is a core technology for ensuring production in fully mechanized tunneling faces. It refers to the technical system that uses support structures (such as steel sheds, pillars, and supports) to support and protect the exposed roof and sides of the roadway after tunneling, preventing accidents such as roof collapse and sidewall spalling. It provides a stable working space for tunneling machine operation, coal transportation, and the safety of personnel and equipment. Its performance directly determines the production efficiency and safety level of the fully mechanized tunneling face.

[0003] Current temporary support technologies for coal mine roadways mainly consist of single hydraulic props, combined steel sheds, and simple suspended supports. Single hydraulic props require manual installation and removal and are suitable for small-section roadways; combined steel sheds are constructed by splicing U-shaped steel beams with props and require multi-stage coordinated installation; simple suspended supports achieve overall movement via hydraulic cylinders and are mostly used in inter-face longwall mining operations. Existing technologies generally rely on manual assistance or single hydraulic drives, data acquisition is primarily based on manual inspection, and there is a lack of effective coordination between equipment.

[0004] Existing support systems are mostly rigidly connected or have a split structure. When moving the support, it needs to be disassembled or dragged as a whole, which can easily lead to misalignment and jamming. This prevents alternating sliding of the front and rear support frames, resulting in increased support gaps and higher safety risks during movement. Furthermore, current technologies often rely on hydraulic cylinders to directly push the support, resulting in complex hydraulic systems, slow pressure transmission, and difficulty in matching the movement distance with the tunneling machine's advance rhythm, with lag times generally exceeding 30 seconds. This fails to meet the requirements of efficient tunneling. Additionally, existing support systems often operate independently, with data transmission relying on a single industrial bus or manual reporting. Key parameters such as the tunneling machine's advance distance and the coal load on the scraper conveyor cannot be fed back to the support system in real time, hindering coordinated operation between equipment and preventing the support frames from moving alongside the tunneling machine. These shortcomings necessitate the development of a new coal mine roadway safety support system. Summary of the Invention

[0005] To address the aforementioned deficiencies and problems, this invention provides a coal mine roadway safety support system. Through alternating support shifting, data linkage, and follow-up protection, it achieves coordinated operation with tunneling machines and scraper conveyors, improving the efficiency of support shifting and the safety of roadway support.

[0006] The solution adopted by this invention to solve its technical problem is: a safety support system for coal mine roadways, comprising a support assembly and a drive assembly. The support assembly includes a front support frame, a rear support frame, support members, vertical pipes, U-shaped steel beams, connecting seats, and support units. Upper and lower horizontal pipes are respectively provided on both sides of the front and rear support frames, arranged parallel to each other vertically. The support members include a front support and a rear support fixedly connected to the upper and lower horizontal pipes, with the lower horizontal pipe supported by the front support and the upper horizontal pipe supported by the rear support. The upper and lower horizontal pipes respectively form a sliding fit with their corresponding support members to achieve front support. The relative movement of the frame and the rear support frame; the outer sides of the front support and the rear support are connected to vertical pipes, the ends of the U-shaped steel beams are respectively fitted into the vertical pipes on the corresponding sides, and baffles are provided on the U-shaped steel beams. A support seat is provided below the end of the U-shaped steel beams. The support seat is used to support the vertical pipes, and the support unit is located below the support seat; the drive assembly includes a drive component, a transmission screw, a screw block and an elastic component. The transmission screw is installed on the upper horizontal pipe through a shaft seat. The output end of the drive component is connected to the transmission screw. The screw block is threadedly fitted onto the transmission screw. The bottom two sides of the screw block are connected to the elastic component. The outer end of the elastic component is connected to the lower horizontal pipe through a connecting seat.

[0007] Furthermore, it also includes a frontal protection unit installed at the front end of the support assembly. The frontal protection unit includes a front frame, a protective cover, and an electromagnet. The front frame includes an upper support rod and a lower support rod, which are slidably assembled inside the upper and lower horizontal tubes, respectively. The outer ends of the upper and lower support rods are connected by connectors. The protective cover is installed on the front frame, and electromagnets are installed at the inner ends of the upper and lower support rods, respectively. The upper support rod can be connected and fixed to the upper horizontal tube via the electromagnet, and the lower support rod can be connected and fixed to the lower horizontal tube via the electromagnet.

[0008] Furthermore, both the upper and lower support rods are internal and external sleeve structures, consisting of an outer sleeve and a core rod. The core rod and the outer sleeve are slidably connected to each other, and a buffer spring is provided between the core rod and the outer sleeve. A protective cover is installed on the core rod.

[0009] Furthermore, the support unit includes a support hydraulic cylinder and a foot seat. The bottom of the cylinder barrel of the support hydraulic cylinder is connected to the support seat, and the output end of the support hydraulic cylinder is connected to the foot seat.

[0010] Furthermore, a guide groove is provided at the top of the lower horizontal tube, and a guide slider is provided at the bottom of the upper horizontal tube, with the guide slider slidably assembled in the guide groove.

[0011] Furthermore, a push plate is fixedly connected to the bottom of the screw block, and the elastic element is connected to the push plate.

[0012] Furthermore, the support component has a U-shaped structure.

[0013] Furthermore, the elastic element is a spring, which is arranged on both sides of the bottom of the screw block, and the screw block is threadedly engaged with the transmission screw.

[0014] The beneficial effects of this invention are: 1. The front and rear support frames are connected and guided relative to each other through the sliding fit of the support components, avoiding offset and jamming problems during the frame relocation process, ensuring the overall stability of the support components, and through the mutual bearing and sliding fit between the two, the front and rear support frames can move alternately, providing structural support for the alternating frame relocation and improving the safety during the support process.

[0015] 2. By driving the screw block through the drive component, the elastic element is alternately stored in energy. Combined with the support hydraulic cylinder, the state switching of the front support frame and the rear support frame is controlled. The spring energy storage is used to drive the support frame forward instantly. It does not need to rely on the hydraulic pushing mechanism, which simplifies the drive structure, reduces maintenance costs, and achieves a rapid response of energy storage and release. The forward movement of the support frame can be completed in a short time, which effectively shortens the lag time of following the machine to move the support frame. It meets the real-time support requirements when the tunneling machine is advancing continuously and improves the efficiency of following the machine to move the support frame.

[0016] 3. The face protection unit controls the fixing status of the upper and lower support rods and horizontal pipes by switching on and off with an electromagnet. It can move forward alternately with the front and rear support frames, so that the protective cover can come into contact with the newly exposed coal face in time and provide temporary protection for the unsupported roof. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a structural schematic diagram of the support assembly.

[0019] Figure 3 This is a magnified view of a portion of the support components.

[0020] Figure 4 This is one of the structural diagrams of the driving component.

[0021] Figure 5 This is the second schematic diagram of the drive component.

[0022] Figure 6 This is a schematic diagram of the frontal protection unit.

[0023] Figure 7 This is a schematic diagram of another structure for the front pole bracket.

[0024] In the diagram: 1-Support assembly, 11-Front support frame, 12-Rear support frame, 13-Upper horizontal tube, 14-Lower horizontal tube, 15-Supporting component, 151-Front support, 152-Rear support, 16-Vertical tube, 17-U-shaped steel beam, 18-Rib plate, 19-Baffle plate, 2-Support unit, 21-Support seat, 22-Support hydraulic cylinder, 23-Foot seat, 3-Drive assembly, 31-Motor, 311-Motor seat, 32-Shaft seat, 33-Transmission screw, 34-Screw block, 35-Push plate, 36-Elastic element, 361-Front spring, 362-Rear spring, 37-Connecting seat, 38-Guide rod, 4-Head protection unit, 41-Front rod frame, 411-Upper support rod, 412-Lower support rod, 42-Protective cover, 43-Electromagnet, 51-Outer sleeve, 52-Core rod, 53-Buffer spring. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Example 1: Existing supports are mostly rigidly connected or have a split structure. When moving the support, it needs to be disassembled or dragged as a whole, which is prone to displacement and jamming. It is impossible to achieve alternating sliding of the front and rear support frames, resulting in increased support gaps during the movement process and increased safety risks. Moreover, existing technologies mostly rely on hydraulic cylinders to directly push the support frame, which has complex hydraulic system pipelines and slow pressure transmission. The movement distance is difficult to match with the advance rhythm of the tunneling machine, and the lag time generally exceeds 30 seconds, which cannot meet the requirements of efficient tunneling. At the same time, existing support systems mostly operate independently, and data transmission relies on a single industrial bus or manual reporting. Key parameters such as the advance distance of the tunneling machine and the coal load of the scraper conveyor cannot be fed back to the support system in real time, making it difficult to achieve coordinated linkage between equipment. The support frame cannot move with the tunneling machine.

[0027] To address the aforementioned issues, this embodiment provides a coal mine roadway safety support system, including a support component 1 and a drive component 3, enabling the support system to quickly move with the machine for roof support protection, thereby achieving coordinated operation between the support system and the tunneling machine and scraper conveyor. The support assembly 1 includes a front support frame 11, a rear support frame 12, a support member 15, a vertical pipe 16, a U-shaped steel beam 17, a connecting seat 37, and a support unit 2. The front support frame 11 and the rear support frame 12 have the same structure. The front support frame 11 is provided with upper horizontal pipes 13 on both sides, and the upper horizontal pipes 13 are arranged symmetrically on the left and right. The rear support frame 12 is provided with lower horizontal pipes 14 on both sides, and the lower horizontal pipes 14 are arranged symmetrically on the left and right. The upper horizontal pipes 13 and the lower horizontal pipes 14 are arranged in parallel vertically.

[0028] A guide groove is provided at the top of the lower horizontal tube 14, and a guide slider is provided at the bottom of the upper horizontal tube 13. The guide slider is slidably assembled in the guide groove.

[0029] The support component 15 includes a front support 151 and a rear support 152, both of which are U-shaped structures. The front support 151 is fixedly installed on the upper horizontal tube 13, and the rear support 152 is fixedly installed on the lower horizontal tube 14. The upper horizontal tube 13 is supported by the rear support 152, and the lower horizontal tube 14 is supported by the front support 151. The upper horizontal tube 13 and the rear support 152 form a sliding fit, and the lower horizontal tube 14 and the front support 151 form a sliding fit. When the upper horizontal tube 13 moves, it will simultaneously drive the front support 151, and at the same time, the upper horizontal tube 13 slides in the rear support 152. When the lower horizontal tube 14 moves, it will simultaneously drive the rear support 152, and at the same time, the lower horizontal tube 14 slides in the front support 151. This realizes the relative movement of the front support frame 11 and the rear support frame 12.

[0030] Vertical tubes 16 are fixedly connected to the outer sides of the front support 151 and the rear support 152. The two ends of the U-shaped steel beam 17 are respectively fitted into the vertical tubes 16 on the corresponding sides, and baffles 19 are provided on the U-shaped steel beam 17. The baffles 19 can fall above the vertical tubes 16 to constrain the U-shaped steel beam 17. A rib plate 18 is provided below the U-shaped steel beam 17. The rib plate 18 is fixedly connected to the U-shaped steel beam inside the vertical tube 16 on the outer side of the front support 151. The U-shaped steel beam and the rib plate 18 form a U-shaped steel canopy.

[0031] A support base 21 is fixedly connected to the lower end of the U-shaped steel beam 17. The support base 21 is used to support the vertical pipe 16. A support unit 2 is set below the support base 21. The support unit 2 includes a support hydraulic cylinder 22 and a foot seat 23. The bottom of the cylinder of the support hydraulic cylinder 22 is connected to the support base 21, and the output end of the support hydraulic cylinder 22 is connected to the foot seat 23. The support unit 2 can support the front support frame 11 and the rear support frame 12.

[0032] The drive assembly 3 is connected to the controller signal. The drive assembly 3 includes a drive component, a transmission screw 33, a screw block 34, and an elastic component 36. The transmission screw 33 is installed inside the upper horizontal tube 13 through a bearing seat 32. The drive component is a motor 31, and a motor seat 311 is fixedly installed inside the upper horizontal tube 13. The motor 31 is installed on the motor seat 311, and the output end of the motor 31 is connected to the transmission screw 33. The screw block 34 is threadedly fitted onto the transmission screw 33, and a guide rod 38 is provided on the upper side of the transmission screw 33. The two ends of the guide rod 38 are connected to the bearing seat 32, and the screw block is also guided and sleeved on the guide rod 38 (the screw block has a guide hole that matches the guide rod 38).

[0033] A push plate 35 is fixedly connected to the bottom of the screw. Elastic members 36 are connected to both sides of the push plate 35. The outer end of the elastic member 36 is connected to the lower horizontal tube 14 through the connecting seat 37. In this embodiment, the elastic member 36 is a spring. The springs are arranged on both sides of the push plate 35. That is, the front spring 361 and the rear spring 362 are connected to both sides of the push plate 35. In the initial state, the front spring 361 and the rear spring 362 are in a natural state and are not compressed or stretched.

[0034] When the output end of the supporting hydraulic cylinder 22 under the current support 151 extends, the U-shaped steel beam 17 of the front support frame 11 provides support and protection, and the front support frame 11 is in a fixed state at this time; when the output end of the supporting hydraulic cylinder 22 under the current support 151 retracts, the U-shaped steel beam 17 of the front support frame 11 automatically falls, and the front support frame 11 is in a free state at this time.

[0035] When the output end of the support hydraulic cylinder 22 under the rear support 152 extends, the U-shaped steel beam 17 of the rear support frame 12 supports and protects it, and the rear support frame 12 is in a fixed state at this time; when the output end of the support hydraulic cylinder 22 under the rear support 152 retracts, the U-shaped steel beam 17 of the rear support frame 12 automatically falls, and the rear support frame 12 is in a free state at this time.

[0036] Procedure for moving the front support frame 11 and rear support frame 12 along with the machine: Both the front support frame 11 and the rear support frame 12 are fixed and supported for protection; the drive screw block 34 moves forward and compresses the front spring 361 a certain distance, so that the front spring 361 stores energy and the rear spring 362 is stretched. When the output end of the support hydraulic cylinder 22 under the rear support 152 retracts, the rear support frame 12 is in a free state, the front spring 361 releases the stored energy, the rear spring 362 resets, and the rear support frame 12 is instantly released and moves forward a certain distance. Then, the output end of the support hydraulic cylinder 22 under the rear support 152 extends, and the rear support frame 12 is fixed and protected again. The drive screw block 34 continues to move forward and compress the front spring 361 a certain distance, so that the front spring 361 stores energy and the rear spring 362 is stretched. When the output end of the support hydraulic cylinder 22 under the rear support 152 retracts, the rear support frame 12 is in a free state, the front spring 361 releases the stored energy, the rear spring 362 resets, and the rear support frame 12 is released and moves forward a certain distance again. This process is repeated until the screw block 34 moves to the front end of the transmission screw 33. At this time, the rear support frame 12 is in front and the front support frame 11 is behind.

[0037] Both the front support frame 11 and the rear support frame 12 are fixed and supported for protection; the drive screw block 34 moves backward to compress the rear spring 362 a certain distance, so that the rear spring 362 stores energy and the front spring 361 is stretched. When the output end of the support hydraulic cylinder 22 under the front support 151 retracts, the front support frame 11 is in a free state, the rear spring 362 releases the stored energy, the front spring 361 resets, and the entire front support frame 11 is instantly released and moves forward a certain distance. Then, the output end of the support hydraulic cylinder 22 under the front support 151 is extended, and the front support frame 11 is fixed and protected again. The drive screw block 34 continues to move backward to compress the rear spring 362 a certain distance, so that the rear spring 362 stores energy and the front spring 361 is stretched. When the output end of the support hydraulic cylinder 22 under the front support 151 retracts, the front support frame 11 is in a free state, the rear spring 362 releases the stored energy, the front spring 361 resets, and the entire front support frame 11 is instantly released and moves forward a certain distance. This process is repeated until the screw block 34 moves to the rear end of the transmission screw 33. At this time, the ends of the front support frame 11 and the rear support frame 12 are flush.

[0038] The above process can be simplified as follows: S1: The front support frame is fixed at the top, and the rear support frame is fixed at the top; S2: The front support frame is fixed at the top, and the rear support frame becomes free. S3: The front support frame is fixed at the top, and the rear support frame moves forward instantly; S4: Rear support frame fixed support, front support frame fixed support; S5: The rear support frame is fixed at the top, and the front support frame becomes free. S6: The rear support frame is fixed at the top, and the front support frame moves forward instantly; This support system is mainly used in conjunction with tunneling machines and scraper conveyors to provide temporary support at the tunneling face. Through the above process, this support system can quickly follow the tunneling machine to move synchronously, and the support components can advance alternately according to the advance distance of the tunneling machine to provide roof support and protection for the coal mine roadway, realizing the coordinated linkage between the support system, the tunneling machine, and the scraper conveyor. This embodiment provides data support for collaborative operations by deploying a data communication and acquisition module. For example... (1) Building a communication network: The “underground 5G + industrial Ethernet” dual-link redundancy design is adopted. 5G is used for data transmission of mobile devices (such as tunneling machines), and industrial Ethernet is used for data transmission of fixed equipment (such as support systems and scraper conveyors). At the same time, intrinsically safe switches are deployed to ensure uninterrupted data transmission. (2) Deployment of data acquisition terminal: A lidar is installed at the end of the tunneling machine to obtain the advance distance and roadway outline, and an inertial navigation module is installed to obtain the machine attitude. The data is uploaded to the central controller of the working face in real time through the 5G module; Weighing sensors are installed at the head, tail, and middle trough of the scraper conveyor to collect coal load data in real time and upload it via industrial Ethernet. Pressure sensors and displacement sensors are installed on the support components to collect support force and frame movement distance; The controller receives real-time data on the tunneling machine's advance distance and automatically controls the support component 1 to quickly follow the tunneling machine's movement based on the advance distance, achieving coordinated support and protection; improving the efficiency of following the machine's movement and reducing the lag time of following the machine's movement.

[0039] Meanwhile, a frontal protection unit 4 is also provided. The frontal protection unit 4 is located at the front end of the support assembly 1. The frontal protection unit 4 includes a front frame 41, a protective cover 42, and an electromagnet 43. The front frame 41 includes an upper support rod 411 and a lower support rod 412. The upper support rod 411 and the lower support rod 412 are slidably assembled in the upper horizontal tube 13 and the lower horizontal tube 14, respectively. The outer ends of the upper support rod 411 and the lower support rod 412 are connected by a connector. The protective cover 42 is fixedly installed on the front frame 41. Electromagnets 43 are installed in the inner ends of the upper support rod 411 and the lower support rod 412, respectively. The upper support rod 411 can be connected and fixed to the upper horizontal tube 13 through the electromagnet 43, and the lower support rod 412 can be connected and fixed to the lower horizontal tube 14 through the electromagnet 43. When the rear support frame 12 moves forward, the electromagnet 43 of the lower support rod 412 is energized and attracts and fixes itself to the lower horizontal tube 14, while the electromagnet 43 of the upper support rod 411 is not energized and does not attract to the upper horizontal tube 13. At this time, the entire protective cover 42 will move forward with the rear support frame 12. When the front support frame 11 moves forward, the electromagnet 43 of the upper support rod 411 is energized and attracted and fixed to the upper horizontal tube 13, while the electromagnet 43 of the lower support rod 412 is not energized and is not attracted to the lower horizontal tube 14. At this time, the protective cover 42 will move forward along with the front support frame 11, thus achieving synchronous movement of the protective cover with the front or rear support frame.

[0040] The face protection unit 4 can make contact with the face coal wall in advance to provide timely support for the newly exposed roof during coal seam roadway excavation.

[0041] Example 2, this embodiment describes a coal mine roadway safety support system, focusing on the differences from that in Example 1.

[0042] In this embodiment, both the upper support rod 411 and the lower support rod 412 are inner and outer sleeve structures, consisting of an outer sleeve 51 and a core rod 52. The core rod 52 and the outer sleeve 51 are slidably sleeved together. A buffer spring 53 is provided between the core rod 52 and the outer sleeve 51, and a protective cover 42 is installed on the core rod 52.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety support system for coal mine roadways, characterized in that, The system includes a support assembly (1) and a drive assembly (3). The support assembly (1) includes a front support frame (11), a rear support frame (12), a support member (15), a vertical pipe (16), a U-shaped steel beam (17), a connecting seat (37), and a support unit (2). The front support frame (11) and the rear support frame (12) are respectively provided with an upper horizontal pipe (13) and a lower horizontal pipe (14) on both sides. The upper horizontal pipe (13) and the lower horizontal pipe (14) are arranged parallel to each other vertically. The support member (15) includes a front support (151) and a rear support (152) that are fixedly connected to the upper horizontal tube (13) and the lower horizontal tube (14) respectively. The lower horizontal tube (14) is supported by the front support (151), and the upper horizontal tube (13) is supported by the rear support (152). The upper horizontal tube (13) and the lower horizontal tube (14) respectively form a sliding fit with the corresponding support member (15) to realize the relative movement of the front support frame (11) and the rear support frame (12). The front support (151) and the rear support (152) are connected to vertical pipes (16) on their outer sides. The ends of the U-shaped steel beam (17) are respectively fitted into the vertical pipes (16) on the corresponding sides. A baffle (19) is provided on the U-shaped steel beam (17). A support seat (21) is provided below the end of the U-shaped steel beam (17). The support seat (21) is used to support the vertical pipe (16). The support unit (2) is located below the support seat (21). The drive assembly (3) includes a drive component, a transmission screw (33), a screw block (34) and an elastic component (36). The transmission screw (33) is installed on the upper horizontal pipe (13) through a shaft seat (32). The output end of the drive component is connected to the transmission screw (33) for transmission. The screw block (34) is threadedly fitted onto the transmission screw (33). The bottom sides of the screw block (34) are connected to the elastic component (36). The outer end of the elastic component (36) is connected to the lower horizontal pipe (14) through a connecting seat (37).

2. The coal mine roadway safety support system according to claim 1, characterized in that, It also includes a frontal protection unit (4) set at the front end of the support assembly (1). The frontal protection unit (4) includes a front pole frame (41), a protective cover (42) and an electromagnet (43). The front pole frame (41) includes an upper support rod (411) and a lower support rod (412). The upper support rod (411) and the lower support rod (412) are slidably assembled in the upper horizontal tube (13) and the lower horizontal tube (14) respectively. The outer ends of the upper support rod (411) and the lower support rod (412) are connected by connectors. The protective cover (42) is set on the front pole frame (41), and electromagnets (43) are installed in the inner ends of the upper support rod (411) and the lower support rod (412) respectively. The upper support rod (411) can be connected and fixed to the upper horizontal tube (13) through the electromagnet (43), and the lower support rod (412) can be connected and fixed to the lower horizontal tube (14) through the electromagnet (43).

3. The coal mine roadway safety support system according to claim 2, characterized in that, The upper support rod (411) and the lower support rod (412) are both inner and outer sleeve structures, consisting of an outer sleeve (51) and a core rod (52). The core rod (52) and the outer sleeve (51) are slidably connected to each other. A buffer spring (53) is provided between the core rod (52) and the outer sleeve (51), and a protective cover (42) is installed on the core rod (52).

4. The coal mine roadway safety support system according to claim 1, characterized in that, The support unit (2) includes a support hydraulic cylinder (22) and a foot (23). The bottom of the cylinder of the support hydraulic cylinder (22) is connected to the support base (21), and the output end of the support hydraulic cylinder (22) is connected to the foot (23).

5. A coal mine roadway safety support system according to claim 1, characterized in that, A guide groove is provided at the top of the lower horizontal tube (14), and a guide slider is provided at the bottom of the upper horizontal tube (13). The guide slider is slidably assembled in the guide groove.

6. The coal mine roadway safety support system according to claim 1, characterized in that, A push plate (35) is fixedly connected to the bottom of the screw block (34), and an elastic element (36) is connected to the push plate (35).

7. A coal mine roadway safety support system according to claim 1, characterized in that, The support (15) has a U-shaped structure.

8. A coal mine roadway safety support system according to claim 1, characterized in that, The elastic element (36) is a spring, which is arranged on both sides of the bottom of the screw block (34). The screw block (34) is threadedly engaged with the transmission screw (33).

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