A quick laying device for composite roof of press-over coal slicing mining

Abstract

The utility model discloses a kind of quick laying devices of composite roof of pressure overburden coal layering stoping, apply in mining engineering technical field, the utility model can make supporting net flatly adhere to composite roof, provide stable and reliable basic condition for anchor rod fixing operation, effectively avoid the construction obstruction caused by net surface relaxation or deviation, support position can flexibly avoid net surface when recycling, prevent hooking winding problem, guarantee that recovery operation is smooth and efficient, realize quick laying, adapt to the narrow operation space of pressure overburden coal layering stoping, simplify construction process, reduce manual operation intensity and safety risk;Different operation section width of pressure overburden coal layering stoping can be flexibly adapted, construction deviation is compensated by buffer effect, avoid damage to roof and supporting net caused by improper supporting force, guarantee the adhesion of supporting net and roof, help anchor rod fixing operation orderly carry out, improve the adaptability and construction safety of device to complex working condition.

Description

Technical Field

[0001] This utility model belongs to the field of mining engineering technology, and specifically relates to a rapid laying device for composite roof of layered coal mining under pressure. Background Technology

[0002] In the process of mineral resource development, some coal resources cannot be recovered through conventional mining methods due to constraints from surface buildings, transportation lines, slope stability, or geological structures, forming overburdened coal. This type of coal is often distributed in areas such as end walls and pit edges. Furthermore, due to differences in coal seam thickness and roof lithology, direct overall mining can easily lead to roof collapse and resource waste. Therefore, layered planning based on geological conditions is necessary. In scenarios involving layered mining of overburdened coal, the roof is often a composite roof composed of multiple layers of soft rock and broken coal, with a loose structure and poor stability, making it prone to collapse during mining. In the event of a landslide, to ensure operational safety, it is necessary to lay support netting to construct a temporary or permanent support system. However, the undulating characteristics of the composite roof and the narrow working space of layered mining place demands on the adaptability and continuity of the support netting laying. This has led to the development of specialized laying devices. As a key auxiliary equipment in layered mining, the roof laying device is primarily used to complete the laying of support netting during the synchronous or sequential process of mining operations. This provides a foundation for subsequent roof support procedures such as anchor bolt and anchor cable fixing. It adapts to the geological characteristics of the composite roof and the operational process of layered mining, ensuring the continuity and safety of mining operations.

[0003] However, traditional composite roof laying devices for layered coal mining under overburden conditions struggle to ensure the support mesh fits flat against the roof, causing inconvenience for anchor bolt fixing operations. The mesh can easily become loose or shifted, affecting construction effectiveness. During retrieval, the support components cannot effectively avoid the mesh, leading to snagging and entanglement that hinders retrieval. Furthermore, these devices are poorly adaptable to confined working spaces, have cumbersome construction processes, require significant manual labor, and pose certain safety risks. They also struggle to adapt to different working section widths, easily damaging the roof and support mesh due to improper support force. Poor fit between the support mesh and the roof further hinders the orderly progress of anchor bolt fixing operations. Insufficient adaptability to complex working conditions and a need to improve construction safety are also issues.

[0004] To address the issues mentioned above, a rapid laying device for composite roof in layered coal mining is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a rapid laying device for composite roof of layered coal mining, which has the advantages of being easy to recover and adaptable to different working faces.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a rapid laying device for composite roof of layered coal mining under overburden, comprising a bottom box, a top box bolted to both sides of the top of the bottom box, a rotating shaft rotatably connected to both sides inside the bottom box, a motor fixedly sleeved on the left side of the rotating shaft, vertical bevel gears fixedly sleeved on both sides of the rotating shaft surface, a screw rotatably connected to the top inside the top box, and the bottom of the screw surface penetrating through both sides of the bottom inside the bottom box and rotatably connected, a horizontal bevel gear fixedly sleeved on the bottom of the screw, and the opposite sides of the two horizontal bevel gears meshing with the top of the vertical bevel gear, a threaded sleeve connected to the surface of the screw, a connecting plate bolted to the opposite sides of the two threaded sleeves, support rods provided on both sides of the top of the connecting plate, support blocks provided at the front and rear ends of the top of the support rods, support bars hinged to the front, back and sides of the support blocks, and an adjustment mechanism provided on both sides of the top of the connecting plate.

[0007] The above technical solution involves the following steps: After the motor starts, it drives the rotating shaft to rotate. The rotating shaft then drives the vertical bevel gear on the surface to mesh with the horizontal bevel gear, which in turn drives the screw to rotate. This causes the screw sleeve on the screw surface to move up and down with the connecting plate. The connecting plate drives the support rod and the top support block to move up and down synchronously. During support, the support bar on the support block hinges and rotates from a vertical state to a horizontal state to support the protective net. After the support net is fixed with anchor bolts and other fixing components, the device is retrieved. During retrieval, the support bar is subjected to the force of contact with the support net and naturally hinges and rotates back to a vertical state, facilitating retrieval. This completes the laying of the protective net and the retrieval of the device, allowing the support net to fit flat against the composite roof, providing a stable and reliable foundation for anchor bolt fixing operations. It effectively avoids construction obstacles caused by net loosening or displacement. During retrieval, the support part can flexibly avoid the net surface, eliminating hooking and entanglement problems, ensuring smooth and efficient retrieval operations, achieving rapid laying, adapting to the narrow working space of layered mining of coal under pressure, simplifying the construction process, and reducing the intensity of manual operation and safety risks.

[0008] The present invention is further configured such that the adjusting mechanism includes a slide groove, the slide groove being opened on both sides of the top of the connecting plate, a slider is slidably connected inside the slide groove, and the top of the slider is bolted to the bottom of the support rod, a spring is bolted to the front end and the rear end of the top of the support rod, and the top of the spring is bolted to the bottom of the support block, and a damper is sleeved inside the spring.

[0009] The above technical solution employs an adjustment mechanism. A slider slides along a groove on the top of the connecting plate, causing the connected support rods to adjust their spacing laterally. A spring and damper at the top of the support rods work together. When the support block is subjected to roof force or deviates, the spring provides elastic buffering, and the damper inhibits excessive spring extension and contraction, ensuring stable support of the protective netting. This solution can flexibly adapt to different working section widths in layered coal mining, compensating for construction deviations through a buffering effect. It avoids damage to the roof and support netting caused by improper support force, ensures the fit between the support netting and the roof, facilitates the orderly execution of anchor bolt fixing operations, and enhances the device's adaptability to complex working conditions and construction safety.

[0010] The present invention is further configured such that slots are provided on both sides of the front side of the connecting plate, and a limiting bolt is provided on the front side of the slider one, and the surface of the limiting bolt penetrates the interior of the slot.

[0011] The above technical solution is adopted: by setting the slot and the limiting bolt, the movement of the slider can be limited.

[0012] The present invention is further configured such that a second slider is welded to the side of the two screw sleeves that are far apart, and a second groove is provided on the inner side of the top box, and the interior of the second groove is slidably connected to the surface of the second slider.

[0013] By adopting the above technical solution, the movement of the screw sleeve can be limited by setting slider two and slide groove two.

[0014] The present invention is further configured such that a telescopic cover is bonded to the top and bottom of the screw sleeve, and the telescopic cover is fitted onto the surface of the screw and bonded to the top of the top box and the two sides of the top of the bottom box.

[0015] The above technical solution, by setting up a telescopic cover, can prevent external dust from contacting and adhering to the screw, thus avoiding affecting the screw's working performance.

[0016] The present invention is further provided that a telescopic sleeve is fitted around the outside of the spring.

[0017] The above technical solution is adopted: by setting up a telescopic sleeve, external dust is prevented from entering the interior of the spring and affecting the working performance of the spring.

[0018] The present invention is further configured such that a rotating wheel is bolted to the bottom of the base box.

[0019] The above technical solution allows for easy movement of the device by incorporating a rotating wheel.

[0020] The present invention is further configured such that a casing is fitted around the outside of the motor.

[0021] The above technical solution, by setting up a chassis, can stabilize the motor.

[0022] In summary, this utility model has the following beneficial effects: 1. This utility model enables the support mesh to fit flat against the composite roof, providing a stable and reliable foundation for anchor bolt fixing operations. It effectively avoids construction obstacles caused by mesh loosening or displacement. During retrieval, the support parts can flexibly avoid the mesh surface, eliminating hooking and entanglement problems, ensuring smooth and efficient retrieval operations, achieving rapid laying, adapting to the narrow working space of layered mining of coal under pressure, simplifying the construction process, and reducing the intensity of manual operation and safety risks. 2. This utility model can flexibly adapt to different working section widths in layered mining of coal under overburden, compensate for construction deviations through a buffering effect, avoid damage to the roof and support mesh caused by improper support force, ensure the fit between the support mesh and the roof, facilitate the orderly implementation of anchor bolt fixing operations, and improve the adaptability of the device to complex working conditions and construction safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front sectional view of the overall structure of this utility model; Figure 3 This is a partial structural front sectional view of this utility model.

[0024] Reference numerals in the attached diagram: 1. Base box; 2. Top box; 3. Rotating shaft; 4. Motor; 5. Vertical bevel gear; 6. Horizontal bevel gear; 7. Screw; 8. Screw sleeve; 9. Connecting plate; 10. Support rod; 11. Support block; 12. Support bar; 13. Slider one; 14. Slide groove one; 15. Slider two; 16. Slide groove two; 17. Spring; 18. Damper; 19. Slot; 20. Limit bolt; 21. Telescopic cover; 22. Telescopic sleeve; 23. Rotating wheel; 24. Chassis. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0026] refer to Figure 1 , Figure 2 , Figure 3A rapid laying device for composite roof in layered coal mining includes a base box 1. A top box 2 is bolted to both sides of the top of the base box 1. A rotating shaft 3 is rotatably connected to both sides inside the base box 1. A motor 4 with a power of 1.5-3kW is fixedly sleeved on the left side of the rotating shaft 3. Vertical bevel gears 5 are fixedly sleeved on both sides of the surface of the rotating shaft 3. A screw 7 is rotatably connected to the top inside the top of the top box 2, and the bottom of the screw 7 penetrates both sides of the bottom inside the base box 1 and is rotatably connected. Horizontal bevel gears 6 are fixedly sleeved on the bottom of the screw 7, and the opposing sides of the two horizontal bevel gears 6 mesh with the top of the vertical bevel gears 5. A threaded sleeve 8 is threaded to the surface of the screw 7, and a connecting plate 9 is bolted to the opposing sides of the two threaded sleeves 8. Support rods 10 are provided on both sides of the top of the connecting plate 9. The front end of the top of the support rod 10... The device is equipped with a support block 11 at the rear end. Support bars 12 are hinged to the front, back and sides of the support block 11. Adjustment mechanisms are provided on both sides of the top of the connecting plate 9. After the motor 4 starts, it drives the rotating shaft 3 to rotate. The rotating shaft 3 drives the vertical bevel gear 5 on the surface to mesh with the horizontal bevel gear 6 to rotate, which in turn drives the screw 7 to rotate. This causes the screw sleeve 8 on the surface of the screw 7 to lift and lower the connecting plate 9. The connecting plate 9 drives the support rod 10 and the top support block 11 to lift and lower synchronously. When supporting, the support bars 12 on the support block 11 are hinged to rotate from a vertical state to a horizontal state to support the protective net. After the protective net is fixed with anchor rods and other fixing components, the device is retrieved. When retrieving, the support bars 12 are subjected to the force of contact with the supporting net and naturally hinge to rotate back to a vertical state, which facilitates retrieval. This completes the laying of the protective net and the retrieval of the device.

[0027] refer to Figure 2 Two sliders 15 are welded to the opposite side of the two screw sleeves 8. A groove 16 is provided on the inner side of the top box 2, and the inside of the groove 16 is slidably connected to the surface of the slider 15. By setting the slider 15 and the groove 16, the movement of the screw sleeves 8 can be limited.

[0028] refer to Figure 1 , Figure 2 The top and bottom of the screw sleeve 8 are bonded with telescopic covers 21, and the telescopic covers 21 are fitted on the surface of the screw 7 and bonded to the top of the top box 2 and the two sides of the top of the bottom box 1. By setting the telescopic covers 21, external dust can be prevented from contacting and adhering to the screw 7 and affecting the working performance of the screw 7.

[0029] refer to Figure 1 , Figure 2 The bottom of the base box 1 is bolted with a rotating wheel 23, which makes it easy to move the device.

[0030] refer to Figure 1 , Figure 2 The motor 4 is fitted with a housing 24, which can stabilize the motor 4. Example

[0031] refer to Figure 1 , Figure 2 , Figure 3 A rapid laying device for composite roof of layered coal mining under pressure includes an adjusting mechanism comprising a chute 14, which is located on both sides of the top of a connecting plate 9. A slider 13 is slidably connected inside the chute 14, and the top of the slider 13 is bolted to the bottom of a support rod 10. A spring 17 is bolted to the front and rear ends of the top of the support rod 10, and the top of the spring 17 is bolted to the bottom of a support block 11. The stiffness of the spring 17 is 5-10 N / mm, and a damper 18 is sleeved inside the spring 17. The damper 18 has a damping coefficient of 10-20 N·s / m. The slider 13 slides along the chute 14 at the top of the connecting plate 9, thereby driving the connected support rod 10 to adjust the lateral spacing. The spring 17 at the top of the support rod 10 and the damper 18 work together. When the support block 11 is subjected to the force of the roof or deviates, the spring 17 plays an elastic buffering role, and the damper 18 inhibits the excessive extension and contraction of the spring 17, ensuring the stable support of the support block 11 for the protective net.

[0032] refer to Figure 1 The connecting plate 9 has slots 19 on both sides of its front side, and the slider 13 has a limit bolt 20 on its front side. The surface of the limit bolt 20 penetrates the inside of the slot 19. By setting the slot 19 and the limit bolt 20, the movement of the slider 13 can be limited.

[0033] refer to Figure 1 , Figure 2 , Figure 3 The spring 17 is fitted with a telescopic sleeve 22. By setting the telescopic sleeve 22, external dust is prevented from entering the interior of the spring 17 and affecting the working performance of the spring 17.

[0034] Brief description of the operation: After the motor 4 starts, it drives the rotating shaft 3 to rotate. The rotating shaft 3 drives the vertical bevel gear 5 on its surface to mesh with the horizontal bevel gear 6 to rotate, which in turn drives the screw 7 to rotate. This causes the screw sleeve 8 on the surface of the screw 7 to move up and down with the connecting plate 9. The connecting plate 9 drives the support rod 10 and the top support block 11 to move up and down synchronously. When supporting, the support bar 12 on the support block 11 is hinged to rotate from a vertical state to a horizontal state to support the protective net. After the protective net is fixed with anchor rods and other fixing components, the device is retrieved. During retrieval, the support bar 12 is subjected to... The force of the support net contacting it naturally reverses and rotates to a vertical position, making it easy to retract. This completes the laying and retrieval of the protective net. The slider 13 slides along the groove 14 on the top of the connecting plate 9, driving the connected support rod 10 to adjust the spacing laterally. The spring 17 and damper 18 at the top of the support rod 10 work together. When the support block 11 is subjected to the force of the top plate or deviates, the spring 17 plays an elastic buffering role, and the damper 18 inhibits the excessive extension and contraction of the spring 17, ensuring the stable support of the support block 11 for the protective net.

[0035] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A rapid laying device for composite roof in layered coal mining, comprising a bottom box (1), characterized in that: The top of the bottom box (1) is bolted to the two sides of the top, and the two sides of the bottom box (1) are rotatably connected to the shaft (3). The left side of the shaft (3) is fixedly sleeved with a motor (4). The two sides of the surface of the shaft (3) are fixedly sleeved with vertical bevel gears (5). The top of the inside of the top box (2) is rotatably connected with a screw (7), and the bottom of the surface of the screw (7) penetrates the two sides of the bottom of the bottom of the bottom box (1) and is rotatably connected. The bottom of the screw (7) is fixedly sleeved with a horizontal bevel gear (6), and the two horizontal bevel gears are fixedly sleeved with a horizontal bevel gear (6). The opposite side of the bevel gear (6) meshes with the top of the vertical bevel gear (5). The surface of the screw (7) is threaded with a threaded sleeve (8). The opposite sides of the two threaded sleeves (8) are bolted to a connecting plate (9). Support rods (10) are provided on both sides of the top of the connecting plate (9). Support blocks (11) are provided at the front and rear ends of the top of the support rods (10). Support bars (12) are hinged to the front, back and sides of the support blocks (11). Adjustment mechanisms are provided on both sides of the top of the connecting plate (9).

2. The rapid laying device for composite roof in layered coal mining according to claim 1, characterized in that: The adjustment mechanism includes a slide groove (14), which is located on both sides of the top of the connecting plate (9). A slider (13) is slidably connected inside the slide groove (14), and the top of the slider (13) is bolted to the bottom of the support rod (10). A spring (17) is bolted to the front and rear ends of the top of the support rod (10), and the top of the spring (17) is bolted to the bottom of the support block (11). A damper (18) is sleeved inside the spring (17).

3. The rapid laying device for composite roof in layered coal mining according to claim 1, characterized in that: The connecting plate (9) has slots (19) on both sides of its front side, and a limit bolt (20) is provided on the front side of the slider (13), and the surface of the limit bolt (20) penetrates the interior of the slot (19).

4. The rapid laying device for composite roof in layered coal mining according to claim 1, characterized in that: The two screw sleeves (8) are welded to the opposite side with a slider two (15), and the inner side of the top box (2) is provided with a sliding groove two (16), and the inside of the sliding groove two (16) is slidably connected to the surface of the slider two (15).

5. The rapid laying device for composite roof in layered coal mining according to claim 1, characterized in that: The top and bottom of the screw sleeve (8) are bonded with a telescopic cover (21), and the telescopic cover (21) is fitted on the surface of the screw (7) and bonded to the top of the top box (2) and the two sides of the top of the bottom box (1).

6. The rapid laying device for composite roof in layered coal mining according to claim 2, characterized in that: The spring (17) is fitted with a telescopic sleeve (22).

7. The rapid laying device for composite roof in layered coal mining according to claim 1, characterized in that: The bottom of the base box (1) is bolted with a rotating wheel (23).

8. The rapid laying device for composite roof in layered coal mining according to claim 1, characterized in that: The motor (4) is fitted with a casing (24).

Images