Supporting structure for tunneling roadway in coal mine goaf

Abstract

The invention relates to the technical field of roadway supporting, and provides a supporting structure for tunneling a roadway in a coal mine goaf, the supporting structure is arranged at the tail of crawler-type mobile equipment, the supporting structure further comprises an H-shaped overturning support, an anchor net unfolding structure and a bottom fixing structure, and the H-shaped overturning support is rotationally arranged at the tail of the crawler-type mobile equipment through a rotating shaft support; the rotating shaft support is arranged at the tail of the crawler-type mobile equipment, two sliding groove areas are arranged on each of the two sides of the H-shaped overturning support, T-shaped mounting supports are slidably connected between the two sides of the two sliding groove areas, and an anchor net unfolding structure is arranged between the tops of the two T-shaped mounting supports located on the upper side. The anchor net can be unfolded and attached to the inner top wall of the goaf tunneling roadway. By means of the technical scheme, the problems that in the prior art, the interior of a coal mine goaf tunneling roadway is narrow, and it is inconvenient for constructors to synchronously complete anchor net unfolding operation and anchor rod drilling operation are solved.

Description

Technical Field

[0001] This invention relates to the field of roadway support technology, specifically to a support structure for tunnels excavated in coal mine goaf areas. Background Technology

[0002] During the mining of underground coal mines, as the mining tunnels are continuously excavated, goaf areas, consisting of cavities and overburden failure zones, are formed within the mine. These goaf areas create hollow spaces within the strata, making them prone to surface subsidence and other geological disasters, affecting underground coal mining operations and the safety of miners. Therefore, research has begun on goaf prevention and control technologies. Currently, there are two main prevention and control methods for goaf areas formed deep underground. The first method involves backfilling the goaf with materials such as gangue and cement slurry, providing support. This method is suitable for supporting abandoned goaf areas. The second method uses anchor bolts and anchor mesh to anchor the inner roof of the goaf tunnels, providing support for tunnels in goaf areas that are still in use.

[0003] In existing technologies, when using anchor bolts and anchor nets to support the inner roof of coal mine goaf tunnels, it is necessary to lay the anchor net on the inner roof of the goaf tunnel, and then use an anchor bolt drilling rig to drill the anchor bolt into the inner roof of the goaf tunnel. This anchors the anchor bolt to the top of the goaf tunnel while simultaneously fixing the anchor net to the inner roof of the goaf tunnel. However, in actual operation, because it is necessary to coordinate two processes—laying the anchor net on the inner roof of the goaf tunnel and drilling the anchor bolt into the top of the goaf tunnel—and because the goaf tunnels are generally quite narrow, it is inconvenient for construction workers to simultaneously complete the anchor net deployment and anchor bolt drilling operations. Summary of the Invention

[0004] This invention proposes a support structure for tunneling roadways in coal mine goaf areas, which solves the problem in the prior art that the interior of tunneling roadways in coal mine goaf areas is relatively narrow, making it inconvenient for construction personnel to simultaneously complete the anchor mesh deployment and anchor bolt drilling operations.

[0005] The technical solution of the present invention is as follows: A support structure for tunneling roadways in coal mine goaf areas, installed at the rear of a tracked mobile equipment, further comprising:

[0006] The H-shaped tilting bracket is rotatably mounted at the tail of the tracked mobile device via a pivot support. The pivot support is mounted on the tail of the tracked mobile device. Two sliding groove areas are provided on both sides of the H-shaped tilting bracket, and a T-shaped mounting bracket is slidably connected between the two sides of the two sliding groove areas.

[0007] The anchor mesh unfolding structure is located between the tops of the two T-shaped mounting brackets on the upper side, which can unfold the anchor mesh and fit it against the inner top wall of the goaf tunnel.

[0008] The bottom fixing structure is located between the bottoms of the two T-shaped mounting brackets on the lower side, and keeps the H-shaped flip bracket vertically fixed.

[0009] To facilitate the rotation of the H-shaped tilting bracket, the rotating shaft support further includes a rotating frame, a rotating shaft, and a T-shaped slot. The rotating frame is fixedly connected to the tail of the tracked mobile device. The rotating shaft is rotatably connected inside the rotating frame. A transmission structure is provided between the rotating shaft and the rotating frame. Connecting arms are connected to both sides of the H-shaped tilting bracket, corresponding to the two sides of the rotating shaft. The T-shaped slot is provided on the inner bottom wall of the rotating frame. A rotation locking structure is provided between the rotating shaft and the T-shaped slot.

[0010] To keep the rotating shaft fixed when it stops rotating, the rotation locking structure further includes a sliding seat, a shovel-shaped fixing seat, and a braking locking assembly. The T-shaped slot is divided into a long slot section and a short slot section. The long slot section is parallel to the rotating shaft. The sliding seats are slidably connected to both sides of the long slot section. An internally threaded sleeve is provided on the top of the sliding seat. The rotating shaft passes through two of the internally threaded sleeves. The shovel-shaped fixing seats are fixedly connected to both sides of the rotating shaft. The shovel-shaped fixing seats are located in the corresponding internally threaded sleeves. The outer arc surface of the shovel-shaped fixing seat is provided with multiple spiral grooves. The spiral grooves are threadedly connected to the inner sidewall of the internally threaded sleeve. The braking locking assembly that cooperates with the two sliding seats is provided in the T-shaped slot.

[0011] To keep the position of the sliding seat fixed, the braking locking assembly further includes a fastening strip and a first hydraulic cylinder. The fastening strip is located in the long slotted section. A braking groove is formed on the side of the sliding seat near the fastening strip. The fastening strip cooperates with the inner wall of the braking groove to brake the sliding seat through friction. The first hydraulic cylinder is provided in the short slotted section, and the output end of the first hydraulic cylinder is fixedly connected to the middle part of the fastening strip.

[0012] To unfold the anchor net on top of the H-shaped flipping bracket, the anchor net unfolding structure further includes curved support rods, rotating slot frames, traction wheels, triangular mounting slot frames, and anchor net support components. The curved support rods are fixedly connected to both sides of the top of the upper T-shaped mounting bracket. Each curved support rod has a rotating slot frame on its top side. A spring damper is provided between the bottom of the rotating slot frame and the top of the curved support rod. The traction wheel is rotatably connected inside the rotating slot frame. A triangular mounting slot frame is provided between the T-shaped mounting bracket and the two rotating slot frames on the same side. The top two sides of the triangular mounting slot frame are fixedly connected to the rotating slot frame. A rotation drive component is provided inside the triangular mounting slot frame to drive the two traction wheels on the same side to rotate in the same direction. Multiple anchor net support components are provided on the top of the triangular mounting slot frame.

[0013] In order to drive the two longitudinal T-shaped mounting brackets to move in opposite directions, the H-shaped flip bracket is further provided with bidirectional hydraulic cylinders on both sides, and the two output ends of the bidirectional hydraulic cylinders are respectively connected to the upper and lower T-shaped mounting brackets.

[0014] To further support the deployed anchor net, the anchor net support assembly includes a receiving cylinder and a sloped support base. The receiving cylinder is fixedly connected to the top of the triangular mounting slot frame. A lifting rod is slidably disposed inside the receiving cylinder. A spring damper is disposed between the inner bottom wall of the receiving cylinder and the bottom end of the lifting rod. The top of the lifting rod is fixedly connected to the sloped support base.

[0015] In order to move the anchor net on top of the H-shaped flipping bracket, multiple hook-shaped bodies are further fixedly connected to the traction wheel around its circumference.

[0016] To keep the H-shaped flip bracket vertically fixed, the bottom fixing structure further includes a fixed support. The fixed support is fixedly connected to both sides of the bottom end of the T-shaped mounting bracket located on the lower side. A stabilizing rod is slidably connected to the bottom of the fixed support. A spring damper is provided between the top of the stabilizing rod and the bottom of the fixed support.

[0017] The working principle and beneficial effects of this invention are as follows:

[0018] 1. In this invention, when it is necessary to support the roof of the tunnel in the goaf of a coal mine, a tracked mobile device can be moved into the tunnel. One side of the anchor mesh is pulled towards the top of the H-shaped tilting support by the anchor mesh unfolding structure. The anchor mesh is unfolded at the top of the H-shaped tilting support, and the height of the anchor mesh unfolding structure is subsequently adjusted so that the anchor mesh contacts the inner roof of the tunnel. A large operating space for the anchor drilling rig is reserved on the top side of the H-shaped tilting support. The installation method of this invention allows the tracked mobile device and the anchor drilling rig to move sequentially one after the other in the tunnel, which facilitates the simultaneous completion of the two processes of anchor mesh unfolding and anchor drilling for supporting the tunnel in the goaf of a coal mine.

[0019] 2. In order to improve the integrity of the anchor net in the process of supporting the roof of the tunnel, the anchor net unfolding structure used in this invention can unfold the anchor net by performing forward and reverse operation of the traction wheel. At the same time, during the subsequent movement of the tracked mobile equipment, the other parts of the anchor net can be squeezed to contact and fit with the roof of the tunnel, so as to anchor the long anchor net as a whole to the roof of the tunnel, thereby improving the support effect of the anchor net and anchor rod on the roof of the tunnel. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention in conjunction with a tracked mobile device;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a partial cross-sectional structural diagram of the H-shaped flip bracket, the sliding groove area, the T-shaped mounting bracket, the rotating frame, the rotating shaft, and the internal threaded sleeve in this invention.

[0024] Figure 4 This is a partial cross-sectional structural schematic diagram of the rotating frame, rotating shaft, internal threaded sleeve, and T-slotted fit in this invention;

[0025] Figure 5 This is a schematic diagram of the structure of the sliding seat, internal threaded sleeve, fastening strip, brake groove and first hydraulic cylinder in this invention.

[0026] Figure 6 This is a partial cross-sectional structural diagram showing the cooperation of the H-shaped flipping bracket, T-shaped mounting bracket, bidirectional hydraulic cylinder, anchor net unfolding structure and bottom fixing structure in this invention.

[0027] Figure 7This is a partial cross-sectional structural diagram showing the cooperation between the T-shaped mounting bracket and the anchor net deployment structure in this invention.

[0028] Figure 8 For the present invention Figure 7 A magnified structural diagram of point A in the middle;

[0029] Figure 9 For the present invention Figure 7 A magnified structural diagram of point B in the middle section;

[0030] Figure 10 This is a schematic diagram of the structure of the traction wheel and hook-shaped body in this invention.

[0031] In the diagram: 1. Tracked mobile equipment; 2. H-shaped tilting bracket; 3. Slide groove area; 4. T-shaped mounting bracket; 5. Rotating frame; 6. Rotating shaft; 7. Connecting arm; 8. T-shaped slot; 9. Sliding seat; 10. Long slotted section; 11. Short slotted section; 12. Internal threaded sleeve; 13. Shovel-shaped fixing seat; 14. Fastening strip; 15. Brake groove; 16. First hydraulic cylinder; 17. Bending support rod; 18. Rotating groove frame; 19. Spring damper one; 20. 21. Traction wheel; 22. Triangular mounting bracket; 23. Two-way hydraulic cylinder; 24. Receiving cylinder; 25. Lifting rod; 26. Spring damper II; 27. Sloping support seat; 28. Hook-shaped body; 29. ​​Fixed support; 30. Stabilizing support rod; 31. Spring damper III; 32. Pulley; 33. Transmission belt; 34. First drive motor; 35. Connecting shaft; 36. Transmission gear; 37. Transmission toothed belt; 38. Second drive motor; 39. Sliding insert plate. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1As shown, this embodiment proposes a support structure for tunneling in a coal mine goaf. It is installed at the tail of a tracked mobile device 1 and includes an H-shaped tilting bracket 2. The H-shaped tilting bracket 2 is rotatably mounted at the tail of the tracked mobile device 1 via a rotating shaft support. The rotating shaft support is mounted on the tail of the tracked mobile device 1. Two sliding groove areas 3 are provided on both sides of the H-shaped tilting bracket 2. T-shaped mounting brackets 4 are slidably connected between the two sides of the two sliding groove areas 3. Two bidirectional hydraulic cylinders 22 are provided on both sides of the H-shaped tilting bracket 2. The two output ends of the bidirectional hydraulic cylinders 22 are respectively connected to the upper and lower... The T-shaped mounting brackets 4 on both sides are connected. When it is necessary to support the inner roof of the tunnel in the goaf of a coal mine, the tracked mobile device 1 is first moved into the tunnel, and the H-shaped tilting bracket 2 is moved into the tunnel at an angle. The tracked mobile device 1 is a common mobile device in coal mining technology. It is suitable for a variety of coal mining equipment and is used to support and move the coal mining equipment. It is a mobile device in the coal mine tunnel that is known to those skilled in the art. The tracked mobile device 1 is also equipped with a power supply system and a hydraulic oil supply system to ensure the normal operation of the coal mining equipment.

[0034] By cooperating with the hydraulic oil supply system, the two T-shaped mounting brackets 4 located on the upper and lower sides of the H-shaped tilting bracket 2 are moved in opposite directions, so that the components installed on the upper and lower T-shaped mounting brackets 4 can contact the inner top wall and inner bottom wall of the tunnel respectively.

[0035] like Figures 1 to 5 As shown, the rotating shaft support includes a rotating frame 5, a rotating shaft 6, and a T-shaped slot 8. The rotating frame 5 is fixedly connected to the tail of the tracked mobile device 1. The rotating shaft 6 is rotatably connected inside the rotating frame 5. A transmission structure is provided between the rotating shaft 6 and the rotating frame 5. The transmission structure includes two pulleys 31. One pulley 31 is fixedly sleeved in the middle of the rotating shaft 6. Multiple transmission belts 32 are provided between the two pulleys 31. A first drive motor 33 is provided on the rotating shaft support. The other pulley 31 is provided on the output end of the first drive motor 33. When it is necessary to drive the rotating shaft 6 to rotate, so that the H-shaped tilting bracket 2 rotates along the center point of the rotating shaft 6, the first drive motor 33 is started. Through the transmission cooperation between the pulley 31 and the transmission belts 32, the rotating shaft 6 is driven to rotate, so that the rotating shaft 6, the connecting support arm 7, and the H-shaped tilting bracket 2 rotate together along the center point of the rotating shaft 6.

[0036] The H-shaped flipping bracket 2 has connecting arms 7 on both sides corresponding to the two sides of the rotating shaft 6. A T-shaped slot 8 is formed on the inner bottom wall of the rotating frame 5. A rotation locking structure is provided between the rotating shaft 6 and the T-shaped slot 8. The rotation locking structure includes a sliding seat 9, a shovel-shaped fixing seat 13, and a braking locking assembly. The T-shaped slot 8 is divided into a long slot section 10 and a short slot section 11. The long slot section 10 is parallel to the rotating shaft 6. Sliding seats 9 are slidably connected to both sides of the long slot section 10. An internally threaded sleeve 12 is provided on the top of the sliding seat 9. The rotating shaft 6 passes through both internally threaded sleeves 12. Both sides of 6 are fixedly connected with shovel-shaped fixing seats 13. The shovel-shaped fixing seats 13 are located in the corresponding internal threaded sleeves 12. The outer arc surface of the shovel-shaped fixing seats 13 is provided with multiple spiral grooves. The spiral grooves are threadedly connected to the inner side wall of the internal threaded sleeves 12. The T-shaped slot 8 is provided with a braking locking component that cooperates with the two sliding seats 9. Because when the anchor bolts and anchor mesh are used to support the roof of the tunnel, the H-shaped flipping support 2 needs to remain vertical. In order to ensure that the rotating shaft 6 and the H-shaped flipping support 2 remain vertical after rotation, the rotating shaft 6 needs to be effectively braked.

[0037] During the rotation of the rotating shaft 6, the shovel-shaped fixing seat 13 also rotates inside the internal threaded sleeve 12. Through the threaded connection between the shovel-shaped fixing seat 13 and the inner wall of the internal threaded sleeve 12, the middle part of the rotating shaft 6 can also bear the load during the rotation of the rotating shaft 6. The longer rotating shaft 6 has the problem of large pressure in the middle. During the rotation of the shovel-shaped fixing seat 13, the internal threaded sleeve 12 is driven to move laterally. The threads of the two internal threaded sleeves 12 are opposite, so the two internal threaded sleeves 12 move in opposite directions under the action of the shovel-shaped fixing seat 13. After the rotating shaft 6 stops moving, the internal threaded sleeve 12 also stops moving, and the inner wall of the internal threaded sleeve 12 is locked to the shovel-shaped fixing seat 13.

[0038] The braking locking assembly includes a fastening strip 14 and a first hydraulic cylinder 16. The fastening strip 14 is located in the long slotted section 10. A braking groove 15 is provided on the side of the sliding seat 9 near the fastening strip 14. The fastening strip 14 cooperates with the inner wall of the braking groove 15 and brakes the sliding seat 9 through friction. The first hydraulic cylinder 16 is provided in the short slotted section 11. The output end of the first hydraulic cylinder 16 is fixedly connected to the middle of the fastening strip 14. When the rotating shaft 6 stops rotating and the internal threaded sleeve 12 and the sliding seat 9 stop moving, the first hydraulic cylinder 16 is activated to drive the fastening strip 14 to move towards the sliding seat 9, so that the fastening strip 14 enters the braking groove 15 and brakes the sliding seat 9 through friction between the fastening strip 14 and the braking groove 15. A sliding insert 38 is fixedly connected to the middle of the fastening strip 14. The sliding insert 38 is slidably connected in the short slotted section 11 to prevent the fastening strip 14 from moving along the sliding path of the sliding seat 9.

[0039] like Figures 1 to 2 and Figures 6 to 10 As shown, an anchor mesh unfolding structure is provided between the tops of the two T-shaped mounting brackets 4 on the upper side. This structure allows the anchor mesh to be unfolded and fitted against the inner roof wall of the goaf tunnel. The anchor mesh unfolding structure includes a curved support rod 17, a rotating slot frame 18, a traction wheel 20, a triangular mounting slot frame 21, and an anchor mesh support assembly. Curved support rods 17 are fixedly connected to both sides of the top of the T-shaped mounting brackets 4 on the upper side. A rotating slot frame 18 is provided on the top side of each curved support rod 17. A spring damper 19 is provided between the bottom of the rotating slot frame 18 and the top of the curved support rod 17. A traction wheel 20 is rotatably connected inside the rotating slot frame 18. A triangular mounting slot frame 21 is provided between the T-shaped mounting bracket 4 and the two rotating slot frames 18 on the same side. The top two sides of the triangular mounting slot frame 21 are fixedly connected to the rotating slot frame 18. This structure allows the anchor mesh to be unfolded and fitted against the inner roof wall of the goaf tunnel. When the wall is in full contact, first tilt the H-shaped flipping bracket 2 to facilitate the user to move one side of the anchor net to the top of the H-shaped flipping bracket 2, so that the traction wheel 20 is connected to one side of the anchor net. Then, as the traction wheel 20 continues to rotate, it drives the anchor net to move towards the two traction wheels 20 on the other side, so that one side of the anchor net is fully spread out between the four traction wheels 20. Then, under the operation driven by the double-headed electric cylinder, the anchor net is in full contact with the inner top wall of the tunnel. Under the action of the spring damper 19, the traction wheel 20 generates a sufficient upward pushing force on the anchor net. Using multiple anchor net support components can not only keep the anchor net parallel when moving from the two traction wheels 20 on one side to the two traction wheels 20 on the other side, but also push the edge area of ​​the anchor net upward when it is driven to rise, so that the anchor net is in full contact with the inner top wall of the tunnel.

[0040] The triangular mounting bracket 21 is equipped with a rotation drive assembly that drives two traction wheels 20 located on the same side to rotate in the same direction. The rotation drive assembly includes a connecting shaft 34. The bottom of the triangular mounting bracket 21 is rotatably connected to the connecting shaft 34. Each traction wheel 20 is also fixed to one side of the connecting shaft 34. The connecting shaft 34 is connected through the rotating bracket 18. The connecting shaft 34 is equipped with a transmission gear 35. The transmission gear 35 is located inside the triangular mounting bracket 21. A transmission toothed belt 36 is provided between the multiple transmission gears 35 located on the same side. The triangular mounting bracket 21 is equipped with a second drive motor 37. The output end of the second drive motor 37 is fixedly connected to the connecting shaft 34 located on the triangular mounting bracket 21. When it is necessary to drive the two traction wheels 20 corresponding to the T-shaped mounting bracket 4 on the same side to rotate, the second drive motor 37 is started. Through the transmission relationship of the transmission gear 35 and the transmission toothed belt 36, the multiple connecting shafts 34 are driven to rotate in the same direction, so that the two traction wheels 20 also rotate in the same direction.

[0041] A spring damper 19 is also provided between the bottom of the triangular mounting slot 21 and the middle of the T-shaped mounting bracket 4 to provide elastic support for the anchor net.

[0042] The top of the triangular mounting frame 21 is provided with multiple anchor mesh support components. The anchor mesh support components include a receiving cylinder 23 and a slope support seat 26. The receiving cylinder 23 is fixedly connected to the top of the triangular mounting frame 21. A lifting rod 24 is slidably arranged inside the receiving cylinder 23. A spring damper 25 is provided between the inner bottom wall of the receiving cylinder 23 and the bottom end of the lifting rod 24. The top of the lifting rod 24 is fixedly connected to the slope support seat 26. When the anchor mesh moves laterally from the top of the H-shaped flipping bracket 2, the top of the multiple slope support seats 26 contacts the bottom end of the anchor mesh to prevent the middle of the anchor mesh from sinking and to ensure that the anchor mesh smoothly contacts the two traction wheels 20 on the other side. Then, during the process of driving the anchor mesh to rise, the spring damper 25 is contracted inside the receiving cylinder 23, causing the slope support seat 26 to drive the anchor mesh upward and ensure that the anchor mesh is in stable contact with the inner top wall of the tunnel.

[0043] Multiple hook-shaped bodies 27 are fixedly connected to the circumference of the traction wheel 20. When the anchor net needs to be unfolded on the top of the H-shaped tilting support 2, the traction wheel 20 is driven to rotate. The anchor net is moved by hooking the inner arc surface of the multiple hook-shaped bodies 27. Because the extension area of ​​the anchor net is large, in order to make the remaining part of the anchor net also fit with the inner top wall of the tunnel when the H-shaped tilting support 2 is moved later, the second drive motor 37 can be started to tilt the anchor net so that the outer arc surface of the hook-shaped body 27 contacts the bottom end of the anchor net. During the movement of the H-shaped tilting support 2, the traction wheel 20 can make the extension part of the anchor net fit with the inner top wall of the tunnel, which is convenient for subsequent use of anchor bolts to support the anchor net and the inner top wall of the tunnel.

[0044] like Figures 1 to 2 and Figure 6 As shown, a bottom fixing structure is provided between the bottoms of the two T-shaped mounting brackets 4 located on the lower side to keep the H-shaped tilting bracket 2 vertically fixed. The bottom fixing structure includes a fixed support 28. Fixed supports 28 are fixedly connected to both sides of the bottom end of the T-shaped mounting brackets 4 located on the lower side. A stabilizing support rod 29 is slidably connected to the bottom of the fixed support 28. A spring damper 30 is provided between the top of the stabilizing support rod 29 and the bottom of the fixed support 28. After the H-shaped tilting bracket 2 is tilted to the vertical direction, while the double-headed electric cylinder drives the traction wheel 20 and the anchor net to rise, the double-headed electric cylinder will also drive the two T-shaped mounting brackets 4 located on the lower side to fall, so that the fixed support 28 and the stabilizing support rod 29 fall together. The bottom end of the stabilizing support rod 29 contacts the inner bottom wall of the tunnel. Under the action of the spring damper 30, the H-shaped tilting bracket 2 remains vertically stable.

[0045] The working principle of this support structure used in tunnels excavated in coal mine goaf areas:

[0046] When it is necessary to support the roof of the tunnel in the goaf of a coal mine, the tracked mobile equipment 1 can be moved into the tunnel in the goaf. One side of the anchor mesh is pulled towards the top of the H-shaped flip support 2 by the anchor mesh unfolding structure. The anchor mesh is unfolded on the top of the H-shaped flip support 2. The height of the anchor mesh unfolding structure is then adjusted to make the anchor mesh contact the inner roof of the tunnel. The top side area of ​​the H-shaped flip support 2 is reserved with a large operating space for the anchor drilling rig. The tracked mobile equipment 1 and the anchor drilling rig can move one after the other in the tunnel, so as to realize the simultaneous completion of the two processes of anchor mesh unfolding and anchor drilling to support the tunnel in the goaf of the coal mine.

[0047] After the anchor mesh that is in contact with the inner top wall of the tunnel is anchored, the tracked mobile equipment 1 and the H-shaped tilting support 2 can be moved. Under the action of multiple traction wheels 20, the originally tilted anchor mesh is also brought into contact with the inner top wall of the tunnel under the action of the traction wheels 20. Then the anchor drilling rig continues to drill anchor bolts in the area of ​​the anchor mesh to realize the anchoring support operation of the tunnel in the goaf of the coal mine.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support structure for tunneling in a coal mine goaf, installed at the rear of a tracked mobile equipment (1), characterized in that, Also includes: H-shaped tilting bracket (2) is rotatably mounted at the tail of tracked mobile device (1) via a pivot support. The pivot support is mounted at the tail of the tracked mobile device (1). Two sliding groove areas (3) are provided on both sides of the H-shaped tilting bracket (2). T-shaped mounting brackets (4) are slidably connected between the two sides of the two sliding groove areas (3). The anchor net unfolding structure is provided between the tops of the two T-shaped mounting brackets (4) on the upper side, which can unfold the anchor net and fit it against the inner top wall of the goaf tunnel. The bottom fixing structure is provided between the bottoms of the two T-shaped mounting brackets (4) on the lower side to keep the H-shaped flip bracket (2) vertically fixed.

2. The support structure for tunneling roadways in coal mine goaf areas according to claim 1, characterized in that, The rotating shaft support includes: Rotating frame (5), which is fixedly connected to the tail of tracked mobile device (1); Rotating shaft (6), the rotating frame (5) is rotatably connected to the rotating shaft (6), a transmission structure is provided between the rotating shaft (6) and the rotating frame (5), and connecting arms (7) are connected to the two sides of the H-shaped flip bracket (2) and the two sides of the rotating shaft (6) respectively. The T-shaped slot (8) is provided on the inner bottom wall of the rotating frame (5), and a rotation locking structure is provided between the rotating shaft (6) and the T-shaped slot (8).

3. A support structure for tunneling in a coal mine goaf area according to claim 2, characterized in that, The rotation locking structure includes: The sliding seat (9) has a T-shaped slot (8) divided into a long slot section (10) and a short slot section (11). The long slot section (10) is parallel to the rotating shaft (6). The sliding seat (9) is slidably connected to both sides of the long slot section (10). An internal threaded sleeve (12) is provided on the top of the sliding seat (9). The rotating shaft (6) passes through the two internal threaded sleeves (12). A shovel-shaped fixing seat (13) is fixedly connected to both sides of the rotating shaft (6). The shovel-shaped fixing seat (13) is located inside the corresponding internal thread sleeve (12). The outer arc surface of the shovel-shaped fixing seat (13) is provided with multiple spiral grooves. The spiral grooves are threadedly connected to the inner side wall of the internal thread sleeve (12). The brake locking assembly is provided in the T-shaped slot (8) and is designed to cooperate with the two sliding seats (9).

4. A support structure for tunneling in a coal mine goaf area according to claim 3, characterized in that, The braking locking assembly includes: Fastening strip (14) is located in the long slotted section (10). The sliding seat (9) has a braking groove (15) on the side near the fastening strip (14). The fastening strip (14) cooperates with the inner wall of the braking groove (15) to brake the sliding seat (9) through friction. The first hydraulic cylinder (16) is provided in the short slotted section (11), and the output end of the first hydraulic cylinder (16) is fixedly connected to the middle part of the fastening strip (14).

5. A support structure for tunneling roadways in coal mine goaf areas according to claim 1, characterized in that, The anchor net deployment structure includes: The curved support rod (17) is fixedly connected to both sides of the top of the T-shaped mounting bracket (4) located on the upper side; Rotating slot frame (18), each of the curved support rods (17) is provided with the rotating slot frame (18) on its top side, and a spring damper (19) is provided between the bottom of the rotating slot frame (18) and the top of the curved support rod (17). The traction wheel (20) is rotatably connected inside the rotating slot frame (18); A triangular mounting bracket (21) is provided between a T-shaped mounting bracket (4) and two rotating brackets (18) on the same side. The top two sides of the triangular mounting bracket (21) are fixedly connected to the rotating brackets (18). A rotation drive assembly is provided inside the triangular mounting bracket (21) to drive the two traction wheels (20) on the same side to rotate in the same direction. Anchor net support assembly, wherein a plurality of anchor net support assemblies are provided on the top of the triangular mounting slot (21).

6. A support structure for tunneling roadways in coal mine goaf areas according to claim 1, characterized in that, Both sides of the H-shaped flip bracket (2) are provided with bidirectional hydraulic cylinders (22), and the two output ends of the bidirectional hydraulic cylinders (22) are respectively connected to the T-shaped mounting brackets (4) on the upper and lower sides.

7. A support structure for tunneling roadways in coal mine goaf areas according to claim 5, characterized in that, The anchor net support assembly includes: A receiving cylinder (23) is fixedly connected to the top of the triangular mounting slot (21). A lifting rod (24) is slidably arranged inside the receiving cylinder (23). A spring damper (25) is provided between the inner bottom wall of the receiving cylinder (23) and the bottom end of the lifting rod (24). The slope support base (26) is fixedly connected to the top of the lifting rod (24).

8. A support structure for tunneling in a coal mine goaf area according to claim 7, characterized in that, Multiple hook-shaped bodies (27) are fixedly connected to the circumference of the traction wheel (20).

9. A support structure for tunneling roadways in coal mine goaf areas according to claim 6, characterized in that, The bottom fixing structure includes: Fixed support (28) is fixedly connected to both sides of the bottom end of the T-shaped mounting bracket (4) located on the lower side. A stabilizing support rod (29) is slidably connected to the bottom of the fixed support (28). A spring damper (30) is provided between the top of the stabilizing support rod (29) and the bottom of the fixed support (28).

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