A coal mine recovery working face supporting device

Abstract

The utility model relates to the technical field of coal mine, concretely relates to a coal mine stoping working face supporting device, and the inside fixed connection of side frame has the bearing bar, and the both sides of bearing bar all have the support plate through the pin shaft rotation connection, the inside fixed connection of side frame has the support plate, and the upper portion one side with the lower portion one side of support plate all have the second air cylinder through bolt fixed connection, one side of two support plates all have the connecting plate fixed connection, and one side of two connecting plates all have the sliding block slidingly connected, the output shaft of two second air cylinders all penetrates support plate, realized the adjustability of support assembly whole height, solved the problem that the supporting device was difficult to carry out longitudinal adjustment according to roof height change in the prior art, improved the adaptive capacity of device to different mining height conditions, avoided the phenomenon of not in place or stress concentration due to height mismatch.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, and in particular to a support device for coal mining longwall faces. Background Technology

[0002] A coal mine longwall face refers to the working area where coal is mined from a coal seam. Because the overlying strata lose support after the coal seam is mined, roof falls and sidewall spalling are highly likely to occur. Therefore, it is essential to provide timely and effective support for the exposed roof and sidewalls to ensure the safety of personnel and equipment. As a core component in this process, the stability, adaptability, and adjustment flexibility of the support device directly affect the safe operation and advancement efficiency of the entire longwall face.

[0003] Especially in working face environments with frequent dynamic changes in the roof and complex geological conditions, existing support devices have gradually revealed a series of obvious limitations and technical problems when dealing with support requirements for different heights, dip angles, and irregular surrounding rock formations. Specifically, existing technologies, such as the utility model patent CN204899952U, disclose a support device for coal mines, including a wooden column with an insulating sleeve and an anti-corrosion sleeve on the outside. A water-swellable sealing sleeve is installed between the column and the insulating sleeve. The top has an inverted trumpet-shaped fixing body and a buffer body, and the bottom has a top structure composed of a stainless steel fixing rod, a hydraulic cylinder, and a transition rod. The overall design has good anti-corrosion, waterproof, and insulation performance, and is easy to assemble and flexible to operate.

[0004] However, despite improvements in material protection and foundation support, this device still suffers from significant drawbacks in practical applications: First, it relies primarily on fixed structures for support, lacking the flexibility to adjust the position and angle of the support plates. This prevents real-time adjustments to the support posture based on roof subsidence or surrounding rock deformation, leading to insufficient support or localized stress concentration. Second, in multi-row support arrangements, longitudinal adjustment of the support plates is difficult, limiting the support range and impacting the overall support effectiveness. Therefore, addressing these shortcomings of existing technology necessitates an innovative coal mine longwall face support device to solve these problems. Utility Model Content

[0005] The purpose of this utility model is to provide a support device for coal mine longwall faces, which solves the problem that the existing technology mainly relies on fixed structures for support, lacks the ability to flexibly adjust the position and angle of the support plate, and cannot adjust the support posture in real time according to the roof subsidence or surrounding rock deformation, resulting in insufficient support or local stress concentration.

[0006] To achieve the above objectives, this utility model provides a support device for a coal mine longwall face, including a base, and a vertical plate fixedly connected to the top of the base, with a side frame slidably connected to one side of the vertical plate.

[0007] A bearing rod is fixedly connected to the inner side of the side frame, and a support plate is rotatably connected to both sides of the bearing rod via pins. A support plate is fixedly connected to the inner side of the side frame, and a second cylinder is fixedly connected to the upper and lower sides of the support plate via bolts. A connecting plate is fixedly connected to one side of each of the two support plates, and a sliding block is slidably connected to one side of each of the two connecting plates. The output shafts of the two second cylinders pass through the support plate, and the output shafts of the two support plates are rotatably connected to one side of each of the two sliding blocks via pins. A bearing plate is provided on one side of the vertical plate, and one side of the bearing plate is fixedly connected to one side of the side frame. A first cylinder is fixedly connected to the top side of the base via bolts, and the output shaft of the first cylinder is fixedly connected to the bottom of the bearing plate.

[0008] The base has a counterweight fixedly connected to one side of its top, and a handle is fixedly connected to one side of the counterweight.

[0009] The top plate is fixedly connected to one side of the upper part of the vertical plate, and telescopic rods are fixedly connected to both sides of the top of the bearing plate, with the top ends of the two telescopic rods fixedly connected to the bottom of the top plate.

[0010] One side of the side frame is fixedly connected to a slider, and the slider is slidably connected to the vertical plate through a groove. One side of the slider is fixedly connected to one side of the support plate.

[0011] Both connecting plates are provided with sliding grooves, and both sliding blocks are slidably connected to the two connecting plates through the sliding grooves.

[0012] The base has wheels fixedly connected to the four corners at the bottom.

[0013] This utility model discloses a support device for a coal mine longwall face. Through a coordinated structure consisting of a base, vertical plate, first cylinder, bearing plate, and side frame, it achieves adjustable overall height of the support assembly. This solves the problem in existing technologies where support devices are difficult to adjust longitudinally according to changes in roof height, improving the device's adaptability to different mining heights and avoiding inadequate support or stress concentration due to height mismatch. By incorporating a support plate, second cylinder, sliding block, connecting plate, and a support plate hinged to the bearing rod inside the side frame, a linkage mechanism is formed that drives the support plate to rotate. This allows the support plate to adjust its tilt angle in real time according to the surrounding rock morphology, enhancing its fit with the roadway roof or sidewalls and effectively improving the inability of traditional fixed support plates to adapt to irregular surfaces. This design addresses issues such as localized voids and support failures, improving the uniformity and overall stability of the support system. The automated drive of the first and second cylinders replaces traditional manual adjustment or mechanical replacement, significantly enhancing the response speed and adjustment accuracy of support operations. It also reduces the workload and exposure time of workers in hazardous areas, improving operational convenience and safety. The sliding connection structure of the side frame on the vertical plate ensures guidance and stability during the lifting process, preventing eccentric loading or swaying. The bearing rod is connected to the support plate via pins, ensuring flexible rotation and reliable load bearing. The support plate is bolted to the inside of the side frame for easy disassembly and maintenance. The overall structural design is reasonable, with clearly defined functions for each component and strong synergy, maintaining good support performance even under complex and variable coal mine geological conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of this utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a side view of the vertical plate structure according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the support plate structure according to an embodiment of the present utility model.

[0019] Figure 5 This is a schematic diagram of the side frame structure of an embodiment of the present utility model.

[0020] 1. Base; 2. Counterweight; 3. Handle; 4. Vertical plate; 5. Top plate; 6. Bearing plate; 7. Telescopic rod; 8. Slider; 9. Slide groove; 10. Side frame; 11. Support plate; 12. Bearing rod; 13. Support plate; 14. Connecting plate; 15. First cylinder; 16. Second cylinder; 17. Sliding block; 18. Sliding groove; 19. Wheel. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 ,

[0023] A support device for a coal mine longwall face includes a base 1, and a vertical plate 4 is fixedly connected to the top of the base 1, and a side frame 10 is slidably connected to one side of the vertical plate 4.

[0024] A bearing rod 12 is fixedly connected to the inner side of the side frame 10, and a support plate 13 is rotatably connected to both sides of the bearing rod 12 via pins. A support plate 11 is fixedly connected to the inner side of the side frame 10, and a second cylinder 16 is fixedly connected to the upper and lower sides of the support plate 11 via bolts. A connecting plate 14 is fixedly connected to one side of each of the two support plates 13, and a sliding block 17 is slidably connected to one side of each of the two connecting plates 14. The output shafts of the two second cylinders 16 pass through the support plate 11, and the output shafts of the two support plates 11 are rotatably connected to one side of each of the two sliding blocks 17 via pins. A bearing plate 6 is provided on one side of the vertical plate 4, and one side of the bearing plate 6 is fixedly connected to one side of the side frame 10. A first cylinder 15 is fixedly connected to the top side of the base 1 via bolts, and the output shaft of the first cylinder 15 is fixedly connected to the bottom of the bearing plate 6.

[0025] The base 1, along with its upper structure, is transported as a whole to the area requiring support in the coal mine longwall face. The base 1 is placed stably on the roadway floor to provide stable foundation support. Then, the first cylinder 15, fixed to one side of the top of the base 1, is activated. The output shaft of the first cylinder 15 extends and retracts, causing the bearing plate 6, fixedly connected to its bottom, to move vertically up and down. Since one side of the bearing plate 6 is fixedly connected to one side of the side frame 10, and the side frame 10 is slidably connected to one side of the vertical plate 4, the side frame 10 moves up and down synchronously along the vertical plate 4 with the bearing plate 6. This allows for flexible adjustment of the entire support assembly in the longitudinal height, adapting to varying mining heights. Once the side frame 10 reaches the appropriate height, two second cylinders 16, installed on the inner support plate 11 of the side frame 10, are further activated. The output shafts of the two second cylinders 16 are rotatably connected to sliding blocks 17 via pins. The sliding blocks 17 are slidably positioned on one side of the connecting plate 14, which is fixed to the side of the support plate 13. As the output shafts of the second cylinders 16 extend and retract, the support plate 16 moves vertically up and down. The extension or retraction of the support plate 13 pushes the sliding block 17 to slide on the connecting plate 14, thereby causing the support plate 13 to rotate around the pin between it and the bearing rod 12. The two support plates 13 can adjust their tilt angles synchronously or independently, so that they can closely fit the irregular curved surface or arc contour of the roadway top or sidewall. Especially in the case of local breakage, subsidence or surrounding rock deformation, the support plate 13 can achieve the best contact state by adjusting the angle, improving the uniformity and load-bearing capacity of the support. During the entire adjustment process, the vertical plate 4 provides guidance and structural support for the up and down sliding of the side frame 10, ensuring the stability of the lifting process. The support plate 11 provides the installation foundation and force support point for the second cylinder 16. The bearing rod 12 serves as the rotation center axis of the support plate 13, ensuring its flexible and reliable rotation. The entire device achieves dual dynamic adjustment of support height and support angle through the coordinated control of the first cylinder 15 and the second cylinder 16. After positioning, it can maintain continuous support force, effectively preventing inner wall collapse and sidewall spalling, and ensuring the safety of the longwall face operation.

[0026] Furthermore, a counterweight 2 is fixedly connected to one side of the top of the base 1, and a handle 3 is fixedly connected to one side of the counterweight 2. During the overall lifting and support of the device, the counterweight 2 increases the overall mass of the base 1, effectively reducing the risk of the device overturning due to the pressure on the support plate 13, and improving the stability and safety of the equipment in working condition. At the same time, the handle 3 makes it convenient for operators to push or fine-tune the position of the entire support device. Especially when the equipment needs to be moved frequently in the roadway, force can be applied through the handle 3, which improves the operability and handling convenience of the equipment, and achieves the effect of enhancing structural stability and improving the convenience of manual operation.

[0027] Furthermore, a top plate 5 is fixedly connected to one side of the upper part of the vertical plate 4, and telescopic rods 7 are fixedly connected to both sides of the top of the bearing plate 6. The top ends of the two telescopic rods 7 are fixedly connected to the bottom of the top plate 5. The telescopic rods 7, the top plate 5, and the bearing plate 6 together form an auxiliary guiding and limiting structure. During the process of the first cylinder 15 driving the bearing plate 6 to rise, the telescopic rods 7 extend synchronously and play a lateral support and guiding role, preventing the bearing plate 6 from shaking or deviating due to uneven force during lifting. At the same time, the top plate 5, as the upper fixed end, enhances the overall rigidity of the vertical plate 4. This structure can also provide a certain buffer and limiting function when the side frame 10 is raised to the highest position, avoiding excessive lifting and structural damage, thus achieving the effect of improving the stability and structural safety of the lifting process.

[0028] Furthermore, a slider 8 is fixedly connected to one side of the side frame 10, and the slider 8 is slidably connected to the vertical plate 4 through the slide groove 9. One side of the slider 8 is fixedly connected to one side of the support plate 6. The slider 8 and the slide groove 9 form a precise sliding pair, which provides a reliable guide path for the side frame 10 to move up and down along the vertical plate 4. This ensures that the side frame 10 can maintain stable vertical movement when the first cylinder 15 pushes the support plate 6, avoiding jamming or tilting. At the same time, this connection method effectively transmits the thrust of the support plate 6 to the side frame 10, making the entire lifting action coordinated and consistent, improving transmission efficiency and motion accuracy, and achieving the effect of optimizing guiding performance and ensuring lifting synchronization.

[0029] Furthermore, each of the two connecting plates 14 is provided with a sliding groove 18, and each of the two sliding blocks 17 is slidably connected to the two connecting plates 14 through the sliding groove 18. The sliding groove 18 provides a limiting track for the linear movement of the sliding block 17, so that the sliding block 17 can only slide in a set direction under the push of the output shaft of the second cylinder 16, avoiding deflection or jamming during the movement, and ensuring that the thrust can be efficiently converted into the rotational power of the support plate 13. At the same time, the cooperation structure between the sliding groove 18 and the sliding block 17 enhances the connection rigidity between the connecting plate 14 and the transmission components, improves the response speed and control accuracy of angle adjustment, and achieves the effect of improving the transmission reliability and the rotational stability of the support plate 13.

[0030] Furthermore, wheels 19 are fixedly connected to the four corners of the base 1. The wheels 19 give the entire support device good mobility, allowing operators to easily push the device to move its position on the roadway floor. This is especially suitable for scenarios where support equipment needs to be continuously deployed in multiple locations on the longwall face, significantly reducing the labor intensity of manual handling and improving the efficiency of equipment deployment and retrieval. At the same time, the wheels 19 are usually made of wear-resistant and explosion-proof materials, adapting to the complex road surface environment in coal mines, thus improving the mobility of the equipment and the efficiency of on-site operations.

[0031] In summary:

[0032] The base 1 is pushed to the specific location requiring support in the coal mine longwall face via the wheels 19 at its four corners. During the movement, the operator can apply force using the handles 3 fixed to one side of the counterweight 2 to facilitate the convenient handling and fine-tuning of the entire device. Once the predetermined position is reached, ensure that the base 1 is placed stably on the roadway floor to provide reliable foundation support. At this time, the first cylinder 15 fixed to one side of the top of the base 1 is activated, and its output shaft extends and retracts, causing the bearing plate 6 fixedly connected to its bottom to move vertically up and down. Since one side of the bearing plate 6 is fixedly connected to one side of the side frame 10, and the side frame 10 slides through the cooperation of the slider 8 and the slide groove 9, Connected to one side of the vertical plate 4, the side frame 10 moves up and down synchronously with the bearing plate 6 along the vertical plate 4, thereby achieving flexible adjustment of the entire support assembly in longitudinal height to adapt to different mining heights or the undulating conditions of the roof 5. During this process, the roof 5 fixed on one side of the upper part of the vertical plate 4 and the telescopic rods 7 fixed on both sides of the top of the bearing plate 6 work together. The two telescopic rods 7 extend or retract synchronously, providing lateral guidance and auxiliary support for the lifting and lowering of the bearing plate 6, preventing it from swaying or shifting due to uneven force. At the same time, the roof 5 enhances the rigidity of the upper structure of the vertical plate 4 and plays a buffering and limiting role when the side frame 10 is raised to the limit position, avoiding structural damage; when the side... After the frame 10 is adjusted to a suitable height, the two second cylinders 16 installed on the inner support plate 11 of the side frame 10 are further activated. Their output shafts are rotatably connected to the sliding block 17 via pins. The sliding block 17 is slidably disposed in the sliding groove 18 on one side of the connecting plate 14, and the connecting plate 14 is fixed to the side of the support plate 13. As the output shafts of the second cylinders 16 are pushed out or retracted, the sliding block 17 is pushed to slide linearly along the sliding groove 18, thereby causing the support plate 13 to rotate around the pin between it and the bearing rod 12. The two support plates 13 can adjust their tilt angle synchronously or independently so that they can closely fit the irregular curved surface or arc of the top or side of the tunnel. With its contoured shape, the support plate 13 can achieve the best contact state through angle adjustment, improving the uniformity and load-bearing capacity of the support. During the entire adjustment process, the vertical plate 4 provides the main structural support and guide for the up and down sliding of the side frame 10. The slider 8 and the slide groove 9 form a precision sliding pair to ensure smooth and reliable lifting. The support plate 11 provides a stable installation base and force support for the second cylinder 16. The bearing rod 12 serves as the rotation center axis of the support plate 13 to ensure its flexible rotation and stable load bearing. After positioning is completed, the device continuously applies support force. Through the cooperative structure of the base 1, vertical plate 4, first cylinder 15, bearing plate 6 and side frame 10, the overall height of the support component is adjustable.By setting a support plate 11, a second cylinder 16, a sliding block 17, a connecting plate 14, and a support plate 13 hinged to the bearing rod 12 inside the side frame 10, a linkage mechanism that can drive the support plate 13 to rotate is formed. This allows the support plate 13 to adjust its tilt angle in real time according to the surrounding rock morphology, enhancing its fit with the roadway and effectively improving the problems of local voids and support failures caused by the inability of traditional fixed support plates to adapt to irregular surfaces. This also improves the uniformity and overall stability of the support. The automated drive of the first cylinder 15 and the second cylinder 16 replaces the traditional manual adjustment or mechanical adjustment. The replacement operation not only significantly improves the response speed and adjustment accuracy of support operations, but also reduces the workload and exposure time of workers in hazardous areas, improving operational convenience and safety. The cooperation between the vertical plate 4, slider 8, and slide 9 provides a precise guide path for the lifting and lowering of the side frame 10, ensuring smooth and unhindered movement and improving the reliability of structural operation. The auxiliary guide and limiting structure composed of the telescopic rod 7, top plate 5, and bearing plate 6 further enhances the stability of the lifting process, prevents eccentric swaying, and has a buffer limiting function, extending the service life of the equipment. The addition of the counterweight 2 increases the overall strength of the base 1. The improved quality effectively reduces the risk of overturning under pressure, enhancing structural stability during operation. The handle 3 facilitates manual pushing and position adjustment, and combined with the wheels 19 at the four corners of the base 1, the entire device boasts excellent mobility, significantly reducing labor intensity during handling and improving deployment and recovery efficiency. It is particularly suitable for mining face environments requiring frequent movement and multi-point deployment. The sliding groove 18 on the connecting plate 14 provides a limiting track for the sliding block 17, ensuring it slides linearly in a predetermined direction, preventing deflection, and improving transmission efficiency and rotation of the support plate 13. The device exhibits excellent stability during operation; its overall structural design is reasonable, with clearly defined functions for each component and strong synergy. Even under complex and variable coal mine geological conditions, it maintains good support performance, meeting the practical needs of high-yield and high-efficiency mines for flexibility, adaptability, and safety in support systems. Compared to existing support structures that only provide basic support but lack adjustment capabilities, this device represents a substantial improvement in support flexibility, ease of adjustment, structural stability, and environmental adaptability. It helps reduce the occurrence of safety accidents such as roof falls and spalling, providing reliable technical support for the safe and efficient advancement of coal mine longwall faces.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A support device for a coal mine longwall face, comprising a base, characterized in that, It also includes a vertical plate fixedly connected to the top of the base, and a side frame slidably connected to one side of the vertical plate; A bearing rod is fixedly connected to the inner side of the side frame, and a support plate is rotatably connected to both sides of the bearing rod via pins. A support plate is fixedly connected to the inner side of the side frame, and a second cylinder is fixedly connected to the upper and lower sides of the support plate via bolts. A connecting plate is fixedly connected to one side of each of the two support plates, and a sliding block is slidably connected to one side of each of the two connecting plates. The output shafts of the two second cylinders pass through the support plate, and the output shafts of the two support plates are rotatably connected to one side of each of the two sliding blocks via pins. A bearing plate is provided on one side of the vertical plate, and one side of the bearing plate is fixedly connected to one side of the side frame. A first cylinder is fixedly connected to the top side of the base via bolts, and the output shaft of the first cylinder is fixedly connected to the bottom of the bearing plate.

2. The coal mine longwall face support device as described in claim 1, characterized in that, A counterweight is fixedly connected to one side of the top of the base, and a handle is fixedly connected to one side of the counterweight.

3. The coal mine longwall face support device as described in claim 1, characterized in that, A top plate is fixedly connected to one side of the upper part of the vertical plate, and telescopic rods are fixedly connected to both sides of the top of the bearing plate, with the top ends of the two telescopic rods fixedly connected to the bottom of the top plate.

4. The coal mine longwall face support device as described in claim 1, characterized in that, A slider is fixedly connected to one side of the side frame, and the slider is slidably connected to the vertical plate through a groove. One side of the slider is fixedly connected to one side of the support plate.

5. A support device for a coal mine longwall face as described in claim 1, characterized in that, Both connecting plates are provided with sliding grooves, and both sliding blocks are slidably connected to the two connecting plates through the sliding grooves respectively.

6. A support device for a coal mine longwall face as described in claim 1, characterized in that, Wheels are fixedly connected to the four corners of the bottom of the base.

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