Coal mine goaf treatment system and method thereof

Abstract

The present application relates to the technical field of goaf treatment, and particularly relates to a coal mine goaf treatment system and method. The technical scheme comprises a roadway mold and a U-shaped steel plate for supporting the inner wall of the roadway, the roadway mold is provided with a connecting device for the U-shaped steel plate, one side of the roadway mold is provided in an open manner, and an arc-shaped discharging groove is formed in the top of the roadway mold. The present application can uniformly distribute the slurry, increase the grouting pressure by extruding the slurry, increase the slurry diffusion range, improve the grouting reinforcement effect, effectively eliminate the bubbles in the grouting slurry by extruding the slurry, improve the compactness of the grouting, realize the automatic pouring of the concrete roadway and the support of the concrete roadway, integrate the concrete roadway pouring, grouting reinforcement and support, greatly improve the efficiency of the concrete roadway pouring and the support efficiency, improve the goaf treatment efficiency, and do not need manual operation and support erection for the roadway, and the degree of automation is high.

Description

A coal mine goaf treatment system and method Technical Field

[0001] This invention relates to the field of goaf management technology, and in particular to a coal mine goaf management system and method. Background Technology

[0002] Coal mining leaves behind a large amount of residual coal, and some mines have left behind large goaf areas due to disorderly mining. With the increasing intensity of coal mining, mine mergers and reorganizations require replanning of mining operations, or, due to the need for re-mining, it is necessary to excavate roadways in the goaf areas to continue coal mining. These goaf areas generally have a long formation time. Although most goaf areas are basically filled, there are still many fissures and even areas that are not completely filled. The surrounding rock in goaf areas is often loose and fractured with poor self-stabilizing ability, and the detection of goaf areas is also very difficult. All of these factors bring great difficulties to mine roadway excavation and support, making goaf roadway support a major challenge for these mines.

[0003] Existing support methods for goaf roadways mainly include scaffolding support, riprap arching, anchor mesh spraying support, and grouting sealing and reinforcement. These support methods require a large amount of manpower to build the support structure and grouting equipment to reinforce it. As a result, the entire goaf area requires a long treatment time and the treatment efficiency is not high. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a coal mine goaf management system and method.

[0005] The technical solution of this invention: A coal mine goaf treatment system, comprising a roadway formwork and a U-shaped steel plate for supporting the inner wall of the roadway, wherein the roadway formwork is provided with a connecting device for the U-shaped steel plate, one side of the roadway formwork is open, and an arc-shaped discharge chute is provided on the top of the roadway formwork, and further comprising:

[0006] A slurry conveying device is installed inside the tunnel formwork to deliver slurry to an arc-shaped discharge chute;

[0007] A slurry diversion device is installed in an arc-shaped discharge trough to divert the slurry in the arc-shaped discharge trough to both sides of the tunnel mold. Baffles are fixed at the bottom of both sides of the tunnel mold.

[0008] The extrusion device is installed on both sides of the tunnel mold to extrude the slurry that is diverted to both sides of the tunnel mold and increase the slurry injection pressure.

[0009] Preferably, the slurry conveying device is fixedly installed in a drive box inside the tunnel mold. A column is fixed to the top of one end of the drive box, and a power box is fixed to the top of the column. A conveying pipe is fixed between the power box and the inner wall of the tunnel mold. A drive motor is installed inside the power box, and a drive shaft rotatably mounted on one side of the power box is fixed to the output shaft of the drive motor. A conveying auger is rotatably installed inside the conveying pipe, and the drive shaft is fixed to the conveying auger. The power box and the inner wall of the tunnel mold are fixed with a conveying pipe. A feeding pipe is fixed to one end of the conveying pipe, and multiple vertical pipes extending into the arc-shaped discharge trough are fixed to the top of the conveying pipe.

[0010] Preferably, the slurry diversion device includes a rotating shaft rotatably installed in an arc-shaped discharge trough, a swing plate fixed at the bottom of the rotating shaft, the swing plate being located above the vertical pipe, and a swing device that drives the rotating shaft to swing back and forth is provided inside the tunnel mold.

[0011] Preferably, the swing device includes a reciprocating screw rotatably mounted on the drive box, the drive shaft being driven by the reciprocating screw, a reciprocating plate slidably mounted inside the drive box and threadedly connected to the reciprocating screw, a lifting rod fixed at the bottom of the reciprocating plate, a lifting plate fixed at the bottom of the lifting rod slidably penetrating the lower end face of the drive box, a linkage plate slidably connected to the power box fixed at the top of the lifting plate, a rack fixed at the top of the linkage plate, and a gear meshing with the rack fixedly sleeved on the rotating shaft.

[0012] Preferably, a bevel gear one is fixedly sleeved on the drive shaft, a driven shaft is rotatably installed between the power box and the drive box, a bevel gear two that meshes with the bevel gear one is fixed to the top of the driven shaft, a cylindrical rod that is fixed to the reciprocating lead screw is rotatably installed on the top of the drive box, and the cylindrical rod and the driven shaft are connected by a belt pulley.

[0013] Preferably, the extrusion device includes inclined rods hinged to both sides of the lifting plate, one end of the inclined rods is hinged to a push plate that can be slidably installed in the tunnel mold, cross rods are slidably installed on both sides of the tunnel mold, extrusion grooves are opened on both sides of the tunnel mold, and extrusion plates are slidably installed in the extrusion grooves, and the two ends of the cross rods are fixedly connected to the push plate and the extrusion plate respectively.

[0014] Preferably, two horizontally arranged guide plates are fixed to the inner walls of both sides of the tunnel mold, and a reinforcing rod is fixed between the guide plates and the inner wall of the tunnel mold. Pulleys are fixed to the top and bottom of the push plate, and a track groove is opened on the opposite side of the two guide plates. The pulleys are in rolling connection with the inner wall of the track groove.

[0015] Preferably, the tunnel mold is equipped with a walking device, the bottom of the tunnel mold has a rectangular hole, cylinders are fixed on both sides of the tunnel mold, the piston rod of the cylinder is fixed with a sealing plate that is slidably installed in the rectangular hole, and a transport trolley is fixed to the bottom of the sealing plate.

[0016] Preferably, the connecting device includes a connecting box fixed to one end of the tunnel formwork, insert plates slidably installed on both sides of the connecting box, slots fixed on the inner walls of both sides of the U-shaped steel plate, one end of the insert plate being adapted to the slot, and two push rod motors fixed inside the connecting box, with the push rods of the push rod motors fixedly connected to the insert plates.

[0017] Another aspect of the present invention provides a method for treating coal mine goaf areas, comprising the following steps:

[0018] Step 1: Add the slurry into the feeding pipe, and then the slurry enters the conveying pipe. Start the drive motor to drive the drive shaft to rotate, which in turn drives the conveying auger to rotate, and drives the slurry to be conveyed from the vertical pipe to the arc-shaped discharge chute.

[0019] Step 2: As the drive shaft rotates, it drives the first bevel gear to rotate, which in turn drives the second bevel gear to rotate, causing the driven shaft to rotate. Under the belt pulley drive, the cylindrical rod rotates, causing the reciprocating screw to rotate, which in turn drives the reciprocating plate to move up and down. The lifting rod follows the movement, causing the lifting plate to move, which in turn drives the linkage plate to move up and down, which in turn drives the rack to move up and down, causing the gears and the rotating shaft to rotate back and forth, which in turn drives the swing plate to swing back and forth, pushing the slurry in the arc-shaped discharge trough to the top of the tunnel mold and flowing down to both sides, so that the slurry is evenly distributed on both sides of the tunnel mold.

[0020] Step 3: The lifting plate moves up and down, driving the inclined bar to move, which in turn drives the push plate to move back and forth, causing the crossbar and extrusion plate to move back and forth. The extrusion plate moves into the extrusion groove, and the slurry enters the extrusion groove. The extrusion plate moves away from the interior of the tunnel mold, pushing out the slurry that has entered the extrusion groove. During the back and forth movement of the extrusion plate, some slurry enters the extrusion groove and is then discharged. The extrusion groove ensures that the slurry added to both sides of the tunnel mold is excessive. Combined with the extrusion plate, this increases the grouting pressure and the slurry diffusion range, which is beneficial for improving the grouting reinforcement effect. By extruding the slurry, air bubbles in the grout can be effectively eliminated, improving the compactness of the grout.

[0021] Step four involves grouting the outside of the tunnel formwork. Baffles prevent the grout from entering between the two baffles. After the concrete solidifies, a concrete tunnel with the same outline as the tunnel formwork is formed inside. Then, the cylinder is activated to lower the sealing plate, aligning the bottom of the transport trolley with the bottom of the baffle. The transport trolley then moves the tunnel formwork, causing the U-shaped steel plate to follow and support the solidified concrete tunnel. This achieves automated concrete tunnel pouring and support, integrating concrete tunnel pouring, grouting reinforcement, and support into one process. This significantly improves the efficiency of concrete tunnel pouring and support, enhancing the efficiency of goaf treatment. It eliminates the need for manual tunnel operation and support, resulting in a high degree of automation.

[0022] Step 5: Start the push rod motor to drive the insert plate out of the slot, which will disconnect the tunnel formwork from the U-shaped steel plate and complete the installation of the U-shaped steel plate.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] 1. The slurry is conveyed into the arc-shaped discharge chute, which drives the swing plate to swing back and forth, pushing the slurry in the arc-shaped discharge chute to flow down to the top and sides of the tunnel mold, so that the slurry is evenly distributed on both sides of the tunnel mold.

[0025] 2. The back-and-forth movement of the extrusion plate, combined with the extrusion groove, allows for an excess of grout to be added to both sides of the tunnel mold. This, combined with the extrusion plate, increases the grouting pressure and expands the grout diffusion range, thus improving the grouting reinforcement effect. The extrusion of the grout effectively eliminates air bubbles in the grout, improving the compactness of the grout.

[0026] 3. By injecting grout into the outside of the roadway formwork, the baffle plates prevent the grout from entering between the two baffle plates. After the concrete solidifies, the transport trolley starts and moves the roadway formwork, causing the U-shaped steel plate to move into the solidified concrete roadway to support it. This achieves automated concrete roadway pouring and support, integrating concrete roadway pouring, grouting reinforcement and support into one, greatly improving the efficiency of concrete roadway pouring and support, and improving the efficiency of goaf treatment. It eliminates the need for manual operation and support of the roadway, and has a high degree of automation. Attached Figure Description

[0027] Figure 1 shows a schematic diagram of the structure of embodiments one, two, and three of the present invention;

[0028] Figure 2 shows a schematic diagram of an arc-shaped discharge trough structure according to an embodiment of the present invention;

[0029] Figure 3 shows a schematic diagram of the vertical tube and swing plate structure according to an embodiment of the present invention;

[0030] Figure 4 shows a schematic diagram of the internal structure of the drive box and the power box according to an embodiment of the present invention;

[0031] Figure 5 shows a cross-sectional structural schematic diagram of the conveying pipe and the vertical pipe according to an embodiment of the present invention;

[0032] Figure 6 is an enlarged structural diagram of point A in Figure 3;

[0033] Figure 7 shows a schematic diagram of the extrusion groove structure according to an embodiment of the present invention;

[0034] Figure 8 shows a schematic diagram of the connection structure between the U-shaped steel plate and the tunnel formwork according to an embodiment of the present invention.

[0035] Reference numerals: 1. Tunnel mold; 2. Fixed rod; 3. Drive box; 4. Column; 5. Power box; 6. Drive motor; 7. Drive shaft; 8. Bevel gear one; 9. Driven shaft; 10. Bevel gear two; 11. Cylindrical rod; 12. Reciprocating screw; 13. Reciprocating plate; 14. Lifting rod; 15. Lifting plate; 16. Diagonal rod; 17. Guide plate; 18. Push plate; 19. Crossbar; 20. Extrusion groove; 21. Extrusion plate; 2 2. Conveying pipe; 23. Feeding pipe; 24. Vertical pipe; 25. Arc-shaped discharge chute; 26. Rotating shaft; 27. Swing plate; 28. Positioning plate; 29. ​​Linkage plate; 30. Rack; 31. Gear; 32. U-shaped steel plate; 33. Connecting box; 34. Insert plate; 35. Slot; 36. Guide plate; 37. Cylinder; 38. Rectangular hole; 39. Sealing plate; 40. Transport trolley; 41. Conveying auger; 42. Baffle plate. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] As shown in Figure 1, the coal mine goaf treatment system proposed in this invention includes a roadway mold 1 and a U-shaped steel plate 32 for supporting the inner wall of the roadway. Concrete is poured on the outside of the roadway mold 1, which serves as a mold for pouring concrete into the roadway. The U-shaped steel plate 32 has the same cross-sectional area as the roadway mold 1. After the roadway mold 1 is removed, the U-shaped steel plate 32 is used to support the formed concrete roadway.

[0039] As shown in Figures 1 and 8, the tunnel mold 1 is equipped with a connection device for the U-shaped steel plate 32. The connection device includes a connection box 33 fixed to one end of the tunnel mold 1. Insert plates 34 are slidably installed on both sides of the connection box 33. Slots 35 are fixed on the inner walls of both sides of the U-shaped steel plate 32. One end of the insert plate 34 is adapted to the slot 35. Two push rod motors are fixed inside the connection box 33. The push rods of the push rod motors are fixedly connected to the insert plates 34. Activating the push rod motors drives the insert plates 34 to disengage from the slots 35, thereby releasing the connection between the tunnel mold 1 and the U-shaped steel plate 32 and completing the installation of the U-shaped steel plate 32. This facilitates the connection and disassembly of the tunnel mold 1 and the U-shaped steel plate 32.

[0040] As shown in Figures 1-5, one side of the tunnel mold 1 is open, and the top of the tunnel mold 1 is provided with an arc-shaped discharge chute 25. It also includes a slurry conveying device, which is set inside the tunnel mold 1 to convey slurry to the arc-shaped discharge chute 25. A slurry conveying device is fixedly installed in a drive box 3 inside the tunnel mold 1. Fixing rods 2 are fixed between the drive box 3 and the inner walls of the tunnel mold 1 on both sides to support the drive box 3. A column 4 is fixed to the top of one end of the drive box 3, and a power box 5 is fixed to the top of the column 4. A conveying pipe 22 is fixed between the power box 5 and the inner wall of the tunnel mold 1. A drive motor 6 is installed inside the power box 5. A drive shaft 7, rotatably mounted on one side of the power box 5, is fixed to the output shaft of the drive motor 6. A conveying auger 41 is rotatably mounted inside the conveying pipe 22. The drive shaft 7 is fixed to the conveying auger 41. The power box 5 is fixed to the inner wall of the tunnel mold 1. A feeding pipe 23 is fixed to one end of the conveying pipe 22. Multiple vertical pipes 24 extending into the arc-shaped discharge chute 25 are fixed to the top of the conveying pipe 22. Starting the drive motor 6 drives the drive shaft 7 to rotate, which in turn drives the conveying auger 41 to rotate, driving the slurry to be conveyed from the vertical pipes 24 into the arc-shaped discharge chute 25, thus realizing the slurry conveying.

[0041] As shown in Figures 1-6, this embodiment also includes a slurry diversion device, which is installed in the arc-shaped discharge trough 25 to divert the slurry in the arc-shaped discharge trough 25 to both sides of the tunnel mold 1. Baffle plates 42 are fixed at the bottom of both sides of the tunnel mold 1. By injecting slurry into the outside of the tunnel mold 1, the baffle plates 42 block the slurry from entering between the two baffle plates 42. After the concrete solidifies, a concrete tunnel with the same outline as the tunnel mold 1 is formed inside the tunnel. The slurry diversion device includes a rotating shaft 26 rotatably installed in the arc-shaped discharge trough 25. A swing plate 27 is fixed at the bottom of the rotating shaft 26. The swing plate 27 is located above the vertical pipe 24. A swinging device is provided inside the tunnel mold 1 to drive the rotating shaft 26 to swing back and forth. The oscillating device includes a reciprocating lead screw 12 rotatably mounted on the drive box 3, a drive shaft 7 being driven by the reciprocating lead screw 12, a bevel gear 8 fixedly mounted on the drive shaft 7, a driven shaft 9 rotatably mounted between the power box 5 and the drive box 3, a bevel gear 10 meshing with the bevel gear 8 fixedly mounted on the top of the driven shaft 9, and a cylindrical rod 11 fixed to the reciprocating lead screw 12 rotatably mounted on the top of the drive box 3, with the cylindrical rod 11 and the driven shaft 9 connected by a pulley. When the drive shaft 7 rotates, it drives the bevel gear 8 to rotate, causing the bevel gear 10 to rotate, which in turn causes the driven shaft 9 to rotate.

[0042] The drive box 3 has a reciprocating plate 13 that is threadedly connected to the reciprocating screw 12. The bottom of the reciprocating plate 13 is fixed with a lifting rod 14. The bottom of the lifting rod 14 slides through the lower end face of the drive box 3 and a lifting plate 15 is fixed thereon. The top of the lifting plate 15 is fixed with a linkage plate 29 that is slidably connected to the power box 5. The top of the linkage plate 29 is fixed with a rack 30. A gear 31 that meshes with the rack 30 is fixedly sleeved on the rotating shaft 26. The driven shaft 9 rotates, driving the cylindrical rod 11 to rotate under the belt pulley drive, which in turn drives the reciprocating screw 12 to rotate, causing the reciprocating plate 13 to move up and down. The lifting rod 14 follows the movement, driving the lifting plate 15 to move, which in turn drives the linkage plate 29 to move up and down, driving the rack 30 to move up and down, driving the gear 31 and the rotating shaft 26 to rotate back and forth, driving the swing plate 27 to swing back and forth, pushing the slurry in the arc-shaped discharge trough 25 to the top two sides of the tunnel mold 1 to flow down, so that the slurry is evenly distributed on both sides of the tunnel mold 1, which helps to distribute the slurry evenly and improve the quality of slurry filling.

[0043] As shown in Figures 2-7, this embodiment also includes an extrusion device, which is disposed on both sides of the tunnel mold 1 to extrude the slurry diverted to both sides of the tunnel mold 1 and increase the slurry injection pressure. The extrusion device includes inclined rods 16 hinged to both sides of the lifting plate 15. One end of the inclined rod 16 is hinged to a push plate 18 that can be slidably installed in the tunnel mold 1. Horizontal rods 19 are slidably installed on both sides of the tunnel mold 1. Extrusion grooves 20 are opened on both sides of the tunnel mold 1. Extrusion plates 21 are slidably installed in the extrusion grooves 20. The two ends of the horizontal rods 19 are fixedly connected to the push plate 18 and the extrusion plate 21, respectively. The lifting plate 15 moves up and down, driving the inclined rod 16 to move, which in turn drives the push plate 18 to move back and forth, causing the crossbar 19 and the extrusion plate 21 to move back and forth. The extrusion plate 21 moves into the extrusion groove 20, and the slurry enters into the extrusion groove 20. The extrusion plate 21 moves away from the interior of the tunnel mold 1, pushing out the slurry that has entered the extrusion groove 20. During the back and forth movement of the extrusion plate 21, some slurry enters into the extrusion groove 20 and is then discharged. The extrusion groove 20 ensures that the slurry added to both sides of the tunnel mold 1 is excessive. Combined with the extrusion of the extrusion plate 21, this increases the grouting pressure and the slurry diffusion range, which is beneficial to improving the grouting reinforcement effect. By extruding the slurry, air bubbles in the grout can be effectively eliminated, improving the compactness of the grout.

[0044] Two horizontally arranged guide plates 17 are fixed to the inner walls of both sides of the tunnel mold 1. Reinforcing rods are fixed between the guide plates 17 and the inner walls of the tunnel mold 1. Pulleys are fixed to the top and bottom of the push plate 18. Track grooves are formed on the opposite sides of the two guide plates 17, and the pulleys are in rolling contact with the inner walls of the track grooves. The cooperation between the pulleys and the guide plates 17 provides guidance for the back-and-forth movement of the push plate 18, ensuring structural stability during its movement.

[0045] As shown in Figures 1 and 7, a traveling device is installed on the tunnel mold 1. A rectangular hole 38 is opened at the bottom of the tunnel mold 1. Cylinders 37 are fixed on both sides of the tunnel mold 1. A sealing plate 39 is slidably installed in the rectangular hole 38 on the piston rod of the cylinder 37. A transport trolley 40 is fixed at the bottom of the sealing plate 39. When the transport trolley 40 is started, it drives the tunnel mold 1 to move, so that the U-shaped steel plate 32 moves to the solidified concrete tunnel to support the concrete tunnel. This realizes automated pouring and support of the concrete tunnel, which greatly saves the time of manual support construction, reduces the labor intensity of construction, and improves the support efficiency and automation level of the tunnel.

[0046] Example 2

[0047] As shown in Figure 1, based on Embodiment 1, a guide plate 36 is fixed on the power box 5, and a guide hole is provided on the guide plate 36. The top of the linkage plate 29 slides through the guide hole.

[0048] In this embodiment, the guide hole on the guide plate 36 provides guidance for the lifting and lowering of the linkage plate 29, so that the linkage plate 29 moves stably and has a reliable structure when lifting and lowering.

[0049] Example 3

[0050] As shown in Figure 1, based on the above embodiment 2, four fixing rods are fixed on one side of the tunnel module 1, and a positioning plate 28 is fixed between the four fixing rods. One end of the rotating shaft 26 is rotatably connected to the positioning plate 28.

[0051] In this embodiment, one end of the rotating shaft 26 is supported by the positioning plate 28, so that the rotating shaft 26 is installed stably and the structure is stable during the rotation of the rotating shaft 26.

[0052] A method for managing coal mine goaf areas includes the following steps:

[0053] Step 1: Add the slurry into the feeding pipe 23, and then the slurry enters the conveying pipe 22. Start the drive motor 6 to drive the drive shaft 7 to rotate, which in turn drives the conveying auger 41 to rotate, driving the slurry to be conveyed from the vertical pipe 24 to the arc-shaped discharge chute 25.

[0054] Step 2: While the drive shaft 7 rotates, it drives the first bevel gear 8 to rotate, which in turn drives the second bevel gear 10 to rotate, causing the driven shaft 9 to rotate. Under the belt pulley drive, the cylindrical rod 11 rotates, causing the reciprocating screw 12 to rotate, which in turn drives the reciprocating plate 13 to move up and down. The lifting rod 14 follows the movement, driving the lifting plate 15 to move, which in turn drives the linkage plate 29 to move up and down, driving the rack 30 to move up and down, driving the gear 31 and the rotating shaft 26 to rotate back and forth, driving the swing plate 27 to swing back and forth, pushing the slurry in the arc-shaped discharge trough 25 to the top two sides of the tunnel mold 1 to flow down, so that the slurry is evenly distributed on both sides of the tunnel mold 1.

[0055] Step 3: The lifting plate 15 moves up and down, driving the inclined rod 16 to move, which in turn drives the push plate 18 to move back and forth, causing the crossbar 19 and the extrusion plate 21 to move back and forth. The extrusion plate 21 moves into the extrusion groove 20, and the slurry enters into the extrusion groove 20. The extrusion plate 21 moves away from the interior of the tunnel mold 1, pushing out the slurry that has entered the extrusion groove 20. During the back and forth movement of the extrusion plate 21, some slurry enters into the extrusion groove 20 and is then discharged. The extrusion groove 20 ensures that the slurry added to both sides of the tunnel mold 1 is excessive. Combined with the extrusion of the extrusion plate 21, this increases the grouting pressure and the slurry diffusion range, which is beneficial to improving the grouting reinforcement effect. By extruding the slurry, air bubbles in the grout can be effectively eliminated, and the compactness of the grouting can be improved.

[0056] Step four involves grouting the exterior of the tunnel formwork 1. The baffle plate 42 blocks the grout from entering between the two baffle plates 42. After the concrete solidifies, a concrete tunnel with the same outline as the tunnel formwork 1 is formed inside the tunnel. Then, the cylinder 37 is activated to lower the sealing plate 39, making the bottom of the transport trolley 40 flush with the bottom of the baffle plate 42. The transport trolley 40 then moves the tunnel formwork 1, causing the U-shaped steel plate 32 to follow and move into the solidified concrete tunnel to support it. This achieves automated concrete tunnel pouring and support, integrating concrete tunnel pouring, grouting reinforcement, and support into one system. This greatly improves the efficiency of concrete tunnel pouring and support, enhances the efficiency of goaf treatment, and eliminates the need for manual tunnel operation and support erection, resulting in a high degree of automation.

[0057] Step 5: Start the push rod motor to drive the insert plate 34 out of the slot 35, thereby disconnecting the tunnel mold 1 from the U-shaped steel plate 32 and completing the installation of the U-shaped steel plate 32.

[0058] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A coal mine goaf management system, characterized in that: The system includes a tunnel mold (1) and a U-shaped steel plate (32) for supporting the inner wall of the tunnel. The tunnel mold (1) is provided with a connecting device for the U-shaped steel plate (32). One side of the tunnel mold (1) is open. An arc-shaped discharge trough (25) is provided on the top of the tunnel mold (1). The system also includes: a slurry conveying device, which is set inside the tunnel mold (1) to convey slurry to the arc-shaped discharge trough (25); a slurry diversion device, which is set inside the arc-shaped discharge trough (25) to divert the slurry in the arc-shaped discharge trough (25) to both sides of the tunnel mold (1). Baffles (42) are fixed at the bottom of both sides of the tunnel mold (1); and an extrusion device, which is set on both sides of the tunnel mold (1) for... The grouting pressure is increased by extruding and diverting the slurry to both sides of the tunnel mold (1); the slurry conveying device is fixedly installed in the drive box (3) inside the tunnel mold (1), and fixing rods (2) are fixed between the two sides of the drive box (3) and the inner walls of the two sides of the tunnel mold (1). A column (4) is fixed at the top of one end of the drive box (3), and a power box (5) is fixed at the top of the column (4). A conveying pipe (22) is fixed between the power box (5) and the inner wall of the tunnel mold (1). A drive motor (6) is installed inside the power box (5), and a drive shaft (7) is rotatably installed on one side of the power box (5) on the output shaft of the drive motor (6). A rotatably installed drive shaft (7) is rotatably installed inside the conveying pipe (22). Equipped with a conveying auger (41), the drive shaft (7) is fixed to the conveying auger (41), the power box (5) is fixed to the inner wall of the tunnel mold (1) with a conveying pipe (22), one end of the conveying pipe (22) is fixed with a feeding pipe (23), and the top of the conveying pipe (22) is fixed with multiple vertical pipes (24) extending into the arc-shaped discharge trough (25); the slurry diversion device includes a rotating shaft (26) rotatably installed in the arc-shaped discharge trough (25), the bottom of the rotating shaft (26) is fixed with a swing plate (27), the swing plate (27) is located above the vertical pipe (24), and the tunnel mold (1) is provided with a swing device that drives the rotating shaft (26) to swing back and forth; the swing device includes The drive shaft (7) is connected to the reciprocating screw (12) rotatably mounted in the drive box (3). The drive shaft (7) is connected to the reciprocating screw (12) in a transmission. The drive box (3) has a reciprocating plate (13) slidably mounted inside the reciprocating plate (13) and threadedly connected to the reciprocating screw (12). A lifting rod (14) is fixed at the bottom of the reciprocating plate (13). A lifting plate (15) is fixed at the bottom of the lifting rod (14) through the lower end face of the drive box (3). A linkage plate (29) is fixed at the top of the lifting plate (15) and slidably connected to the power box (5). A rack (30) is fixed at the top of the linkage plate (29). A gear (31) meshing with the rack (30) is fixedly sleeved on the rotating shaft (26).A bevel gear 1 (8) is fixedly sleeved on the drive shaft (7). A driven shaft (9) is rotatably installed between the power box (5) and the drive box (3). A bevel gear 2 (10) that meshes with the bevel gear 1 (8) is fixed to the top of the driven shaft (9). A cylindrical rod (11) that is fixed to the reciprocating screw (12) is rotatably installed to the top of the drive box (3). The cylindrical rod (11) and the driven shaft (9) are connected by a belt pulley. The extrusion device includes a slant rod (16) hinged to both sides of the lifting plate (15). One end of the slant rod (16) is hinged to a push plate (18) that can be slidably installed in the tunnel mold (1). A crossbar (19) is slidably installed on both sides of the tunnel mold (1). Extrusion grooves (20) are opened on both sides of the tunnel mold (1). An extrusion plate (21) is slidably installed in the extrusion groove (20). The two ends of the crossbar (19) are fixedly connected to the push plate (18) and the extrusion plate (21) respectively.

2. The coal mine goaf management system according to claim 1, characterized in that, The inner walls of both sides of the tunnel mold (1) are fixed with two horizontally arranged guide plates (17). A reinforcing rod is fixed between the guide plate (17) and the inner wall of the tunnel mold (1). The top and bottom of the push plate (18) are fixed with pulleys. A track groove is opened on the opposite side of the two guide plates (17). The pulley is rolled in connection with the inner wall of the track groove.

3. The coal mine goaf management system according to claim 2, characterized in that, The tunnel mold (1) is equipped with a walking device. A rectangular hole (38) is opened at the bottom of the tunnel mold (1). Cylinders (37) are fixed on both sides of the tunnel mold (1). A sealing plate (39) is fixed to the piston rod of the cylinder (37) and slidably installed in the rectangular hole (38). A transport trolley (40) is fixed to the bottom of the sealing plate (39).

4. A coal mine goaf management system according to claim 3, characterized in that, The connecting device includes a connecting box (33) fixed to one end of the tunnel mold (1), and insert plates (34) are slidably installed on both sides of the connecting box (33). Slots (35) are fixed on the inner walls of both sides of the U-shaped steel plate (32). One end of the insert plate (34) is adapted to the slot (35). Two push rod motors are fixed inside the connecting box (33), and the push rods of the push rod motors are fixedly connected to the insert plates (34).

5. A method for managing a coal mine goaf management system according to any one of claims 4, characterized in that, Includes the following steps: Step 1: Add the slurry into the feeding pipe (23), and then the slurry enters the conveying pipe (22). Start the drive motor (6) to drive the drive shaft (7) to rotate, which in turn drives the conveying auger (41) to rotate, driving the slurry to be conveyed from the vertical pipe (24) to the arc-shaped discharge trough (25). Step 2: While the drive shaft (7) is rotating, it drives the first bevel gear (8) to rotate, which in turn drives the second bevel gear (10) to rotate, which in turn drives the driven shaft (9) to rotate. Under the belt pulley drive, the cylindrical rod (11) rotates, which in turn drives the reciprocating screw (12) to rotate, which in turn drives the reciprocating plate (13) to move up and down. The lifting rod (14) follows the movement, which drives the lifting plate (15) to move, which in turn drives the linkage plate (29) to move up and down, which in turn drives the rack (30) to move up and down. The gear (31) and shaft (26) are driven to rotate back and forth, which in turn drives the swing plate (27) to swing back and forth, pushing the slurry in the arc-shaped discharge trough (25) to flow down to the top sides of the tunnel mold (1), so that the slurry is evenly distributed on both sides of the tunnel mold (1); in the third step, the lifting plate (15) moves up and down, which drives the inclined bar (16) to move, which drives the push plate (18) to move back and forth, causing the cross bar (19) and the extrusion plate (21) to move back and forth. The extrusion plate (21) moves into the extrusion groove (20), and the slurry enters into the extrusion groove (20). The extrusion plate (21) moves away from the interior of the tunnel mold (1), pushing out the slurry that has entered the extrusion groove (20). During the back and forth movement of the extrusion plate (21), some of the slurry... The material enters the extrusion groove (20) and is then discharged. The extrusion groove (20) allows the grout added to both sides of the tunnel mold (1) to be excessive. Combined with the extrusion plate (21), the grouting pressure is increased, and the diffusion range of the grout is increased, which is beneficial to improving the grouting reinforcement effect. By extruding the grout, air bubbles in the grout can be effectively eliminated, and the density of the grouting can be improved. In step four, grout is injected into the outside of the tunnel mold (1). The baffle plate (42) blocks the grout from entering between the two baffle plates (42). After the concrete solidifies, a concrete tunnel with the same outline as the tunnel mold (1) is formed in the tunnel. Then, the cylinder (37) is started to drive the sealing plate (39) to descend, so that the transport trolley (4) The bottom of 0) is flush with the bottom of the baffle plate (42). The transport trolley (40) starts and drives the roadway mold (1) to move, so that the U-shaped steel plate (32) moves into the solidified concrete roadway to support the concrete roadway. This realizes the automated pouring of concrete roadway and the support of concrete roadway. It integrates concrete roadway pouring, grouting reinforcement and support, greatly improves the efficiency of concrete roadway pouring and support, improves the efficiency of goaf treatment, and eliminates the need for manual operation of roadway support and erection. The degree of automation is high. Step 5: Start the push rod motor to drive the insert plate (34) to disengage from the slot (35), so that the connection between the roadway mold (1) and the U-shaped steel plate (32) can be released, and the installation of the U-shaped steel plate (32) is completed.

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