A tunnel paving auxiliary device

Abstract

A tunnel mesh-laying auxiliary device addresses the existing technical issues of requiring the tunnel boring machine to stop and retreat before permanent support operations can be carried out, the disconnection between the existing temporary support device and the permanent tunnel support operation, the resulting safety hazards, and low tunneling efficiency. The device comprises a finger shield plate connected to the support top beam of the temporary support device, an anchor net support frame disposed below the finger shield plate, and a support net lifting mechanism disposed at each end of the anchor net support frame. The telescopic end of the support net lifting mechanism is connected to the end of the anchor net support frame, and the fixed end of the support net lifting mechanism is connected to the side of the temporary support device. It has a reasonable design and a compact structure. When the temporary support device is used to cover the continuous tunneling operation, it can achieve a seamless connection between temporary support and permanent support operations, allowing tunneling and permanent support to operate in parallel, improving tunneling efficiency, preventing roof subsidence, and ensuring tunnel support quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel excavation auxiliary equipment, and specifically relates to a tunnel net laying auxiliary device that can achieve seamless connection between temporary support and permanent support operations when a temporary support device covers the continuous operation of tunneling operations, so that tunneling and permanent support can operate in parallel, improve tunneling efficiency, avoid roof sinking, and ensure the quality of tunnel support. Background Art

[0002] Mining and tunneling are two key aspects of coal mining production. With the rapid development of technology and equipment, my country's fully mechanized mining capabilities have significantly improved. However, this significant increase in coal production at the working face has also increased the consumption of roadway materials, resulting in a problem where roadway excavation speed cannot keep up with mining needs. Currently, the common roadway excavation process is: coal cutting and removal - tapping the side and roof - temporary support - brushing and cleaning the side - and permanent support. Specifically, after the roadheader (TBM) completes its cutting, it stops and retreats, and workers use temporary support to carry out permanent support operations such as setting up the drill rig and driving anchor bolts. Furthermore, before permanent support is implemented, anchor nets must be laid on the roadway roof or sides. However, the existing structure of temporary support devices is inconsistent with the permanent support operations in the roadway, often resulting in empty roof operations and high safety risks. Furthermore, the TBM only operates at 20% to 25% efficiency, resulting in low tunneling efficiency. This severely restricts the transfer of coal roadway working faces and normal production in coal mines, and has become a common bottleneck in my country's coal mines. Therefore, it is necessary to improve the mesh laying method and auxiliary devices of the existing tunnel permanent support operation. Summary of the Invention

[0003] The present invention is aimed at the above problems and provides a tunnel mesh auxiliary device that can achieve seamless connection between temporary support and permanent support operations when the temporary support device covers the continuous operation of excavation operations, so that excavation and permanent support can operate in parallel, improve excavation efficiency, avoid roof sinking, and ensure the quality of tunnel support.

[0004] The technical solution adopted by the present invention is: the tunnel net laying auxiliary device includes a finger shield guard plate, which is characterized in that: the finger shield guard plate is connected to the support top beam of the temporary support device, and an anchor net lifting frame is provided below the finger shield guard plate, and a net supporting lifting mechanism is provided at both ends of the anchor net lifting frame, the telescopic end of the net supporting lifting mechanism is connected to the end of the anchor net lifting frame, and the fixed end of the net supporting lifting mechanism is respectively connected to the side of the temporary support device.

[0005] The finger shield guard plate comprises a guard plate body, one end of which is provided with a plurality of groups of finger-shaped protrusions, with spacing grooves provided between adjacent groups of finger-shaped protrusions. A guard plate connecting portion is provided at the other end of the guard plate body. The finger shield guard plate is connected to the supporting top beam of the temporary support device through the guard plate connecting portion, and the finger shield guard plate is used to temporarily support the tunnel roof within the space where the top anchor net is laid. At the same time, anchor rods are driven into the tunnel roof through the spacing grooves between the finger-shaped protrusions at the ends of the guard plate body, and the anchor net is fixed using anchor rod plates at the ends of the anchor rods. The size of the spacing grooves matches the size of the anchor rod plates.

[0006] The anchor net support frame includes a net-supporting crossbeam arranged transversely along the roadway. Several sets of net-supporting longitudinal beams are installed on the crossbeam, located on one side of the anchor bolting area, with anchor bolting spaces provided between adjacent sets of net-supporting longitudinal beams. The crossbeam and the several sets of net-supporting longitudinal beams on it are used to support the anchor net. Anchor bolts are then driven into the roadway roof within the top anchor net laying space on the temporary support device through the anchor bolting spaces between the net-supporting longitudinal beams.

[0007] The net-supporting lifting mechanism includes a vertically arranged lifting plug column and a net-supporting hydraulic cylinder. The upper end of the lifting plug column is hinged to the end of the net-supporting crossbeam of the anchor net lifting frame, and the lower end of the lifting plug column is movably inserted into a lifting plug sleeve provided on the side of the temporary support device. In addition, the lower end of the net-supporting hydraulic cylinder is hinged to the outer portion of the lifting plug sleeve, and the upper end of the net-supporting hydraulic cylinder is hinged to the net-supporting crossbeam. The extension and retraction of the net-supporting hydraulic cylinder drives the anchor net lifting frame to move back and forth within the lifting plug sleeve along the lifting plug columns at both ends, thereby achieving stable support for the top anchor net and facilitating the installation of anchor rods.

[0008] The tunnel mesh-laying auxiliary device also includes an auxiliary clamping mechanism located at one end of the finger shield plate's extension direction. This mechanism supports the end of the finger shield plate's extension, preventing deformation and ensuring temporary support for the tunnel roof. The auxiliary clamping mechanism also provides auxiliary compression of the edges of the top anchor mesh within the top anchor mesh laying space, thereby improving the laying effect at the overlapped joints between each anchor mesh.

[0009] The auxiliary clamping mechanism includes several sets of clamping beams, one end of which is hinged to the upper portion of the temporary support device, and the other end of which is hinged to the telescopic end of a beam hydraulic cylinder. The fixed end of the beam hydraulic cylinder is hinged to the upper portion of the temporary support device, below the clamping beam. The expansion and contraction of the beam hydraulic cylinder drives the clamping beam to swing up and down, thereby clamping the ends of the extended ends of the finger shield and the edges of the top anchor net.

[0010] The auxiliary clamping mechanism also includes a clamping beam mounted on top of the temporary support device. Several groups of clamping beams are mounted on top of the clamping beams, with anchor avoidance intervals provided between adjacent groups of clamping beams. Furthermore, one end of the clamping beam is hingedly connected to the end of the corresponding clamping beam, and the fixed ends of the hydraulic cylinders of the beams are hingedly connected to the sides of the clamping beam. The clamping beams securely mount the auxiliary clamping mechanism on top of the temporary support device, and the anchor avoidance intervals provided between the clamping beams prevent the anchor ends and anchor plates from being exposed outside the roadway roof, thereby preventing damage to the permanent support structure.

[0011] The temporary support device includes a front shield body, and a rear shield body is arranged at the rear of the front shield body; the front shield body includes a front shield top beam, and front shield support boxes are respectively arranged on both sides of the front shield top beam, the front shield support box includes a front shield upper box and a front shield lower box, and a front shield lifting mechanism is arranged between the front shield upper box and the front shield lower box; the rear shield body includes a rear shield top beam, and rear shield support boxes are respectively arranged on both sides of the rear shield top beam, the rear shield support box includes a rear shield upper box and a rear shield lower box, and a rear shield lifting mechanism is arranged between the rear shield upper box and the rear shield lower box; the top beams of the front shield body and the rear shield body and the support boxes on both sides form an internal working space; and the front shield body and the rear shield body are connected by a pushing mechanism. The shield lifting mechanism is arranged on both sides of the front and rear shield bodies and between the upper and lower split structures of the support box to support the top plate of the tunnel, and drive the front shield top beam and the rear shield top beam to rise and fall to adapt to the height and shape of the tunnel top plate; and, by utilizing the cooperation of the shield lifting mechanism and the pushing mechanism, the temporary support device and the tunnel laying auxiliary device thereon can cooperate with the tunneling operation to realize the parallel operation of tunneling and permanent support, thereby improving the tunneling efficiency.

[0012] The finger shield plate is connected to the rear of the front shield beam of the front shield body; the anchor net support frame is located within the top anchor net laying space on the upper portion of the front shield body; and the fixed ends of the net support lifting mechanism are connected to the inner sides of the upper front shield box on both sides of the front shield body. Permanent support operations for the tunnel roof and sides are performed at the rear of the front shield beam and between the front and rear shield bodies, thereby achieving a seamless transition between temporary and permanent support operations, improving operational efficiency, ensuring tunnel support quality, and ensuring operational safety.

[0013] A bottom shield is installed between the front shield lower boxes on both sides of the front shield body, and between the rear shield lower boxes on both sides of the rear shield body. A top anchor drill is installed on the bottom shield and connected to the bottom shield via a drill connection frame. This allows the anchor drill to move synchronously with the temporary support device, facilitating permanent support operations.

[0014] The beneficial effects of the present invention are as follows: since the present invention adopts a finger shield guard plate connected to the support top beam of the temporary support device, an anchor net lifting frame is arranged under the finger shield guard plate, and a net lifting mechanism is respectively arranged at both ends of the anchor net lifting frame, the telescopic end of the net lifting mechanism is connected to the end of the anchor net lifting frame, and the fixed end of the net lifting mechanism is respectively connected to the side of the temporary support device, so the design is reasonable and the structure is compact. When the temporary support device covers the continuous operation of the excavation operation, it can achieve seamless connection between the temporary support and the permanent support operation, so that the excavation and permanent support can be operated in parallel, the excavation efficiency is improved, the roof is avoided from sinking, the support quality of the tunnel is ensured, and the safety of the tunnel excavation operation environment is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 A-direction view.

[0017] Figure 3 yes Figure 1 A structural diagram of the finger shield guard.

[0018] Figure 4 yes Figure 1 Schematic diagram of a connection structure of the anchor net lifting frame, auxiliary clamping mechanism and temporary support device.

[0019] Figure 5 yes Figure 4 A structural schematic diagram of the auxiliary clamping mechanism in.

[0020] Figure 6 yes Figure 3 Schematic diagram of a connection structure between the finger shield guard plate and the supporting top beam of the temporary supporting device.

[0021] Figure 7 It is a structural schematic diagram of a temporary support device used in conjunction with the tunnel net laying auxiliary device of the present invention.

[0022] Figure 8 yes Figure 7 Cross-sectional view of the internal structure.

[0023] Figure 9 yes Figure 8 B-direction view.

[0024] Figure 10 It is a schematic diagram of an implementation method of the present invention when assisting in laying a mesh on the tunnel roof.

[0025] Explanation of the numbers in the figure: 1. Shield guard plate, 2. Anchor net lifting frame, 3. Support net lifting mechanism, 4. Auxiliary pressing mechanism, 5. Temporary support device, 6. Top anchor net laying space, 7. Guard plate body, 8. Guard plate connection part, 9. Finger-shaped convex plate, 10. Interval groove, 11. Support net crossbeam, 12. Support net longitudinal beam, 13. Anchor rod installation interval, 14. Lifting plug column, 15. Lifting plug sleeve, 16. Support net hydraulic cylinder, 17. Pressing cantilever beam, 18. Cantilever beam hydraulic cylinder, 19. Pressing longitudinal beam, 20. Pressing crossbeam, 21. Anchor rod avoidance interval, 22. Support top beam, 23. Top beam Connecting part, 24 telescopic front beam, 25 telescopic beam hydraulic cylinder, 26 roof guard, 27 guard plate hydraulic cylinder, 28 front shield body, 29 rear shield body, 30 pushing mechanism, 31 working space, 32 front shield upper box body, 33 front shield lower box body, 34 front shield lifting mechanism, 35 front shield top beam, 36 rear shield upper box body, 37 rear shield lower box body, 38 rear shield lifting mechanism, 39 rear shield top beam, 40 bottom shield, 41 side anchor drilling rig, 42 top anchor drilling rig, 43 anchor net, 44 drilling rig connecting frame, 45 tunnel roof, 46 anchor rod. DETAILED DESCRIPTION

[0026] according to Figures 1 to 10 The specific structure of the present invention is described in detail. The tunnel mesh laying auxiliary device includes a finger shield guard plate 1, which is composed of a guard plate body 7. The rear end of the guard plate body 7 is provided with several groups of finger-shaped protrusions 9. Between two adjacent groups of finger-shaped protrusions 9, there is a spacing groove 10 with a size matching that of the anchor plate. The front end of the guard plate body 7 is provided with a guard plate connection portion 8. The finger shield guard plate 1 is connected to the support top beam 22 (front shield top beam 35) of the temporary support device 5 through the guard plate connection portion 8. The finger shield guard plate 1 is then used to temporarily support the tunnel roof located within the top anchor mesh laying space 6. Anchor rods are respectively driven into the tunnel roof through the spacing grooves 10 between the finger-shaped protrusions 9 at the rear end of the guard plate body 7, and the anchor mesh is fixed by the anchor plate at the lower end of the anchor rod.

[0027] An anchor net support frame 2 is installed below the finger shield 1, with a net support lifting mechanism 3 installed at each end. The anchor net support frame 2 consists of a net support crossbeam 11 arranged transversely along the roadway. A plurality of net support longitudinal beams 12 are installed on the crossbeam 11, located behind the anchor rod driving area, and are evenly spaced along the roadway. The positions of the net support longitudinal beams 12 correspond to the positions of the finger-shaped protrusions 9 on the finger shield 1. An anchor rod driving intervals 13 are provided between adjacent sets of net support longitudinal beams 12. Thus, the net support crossbeam 11 and the plurality of net support longitudinal beams 12 on it are used to support the anchor net. Through the anchor rod driving intervals 13 between the net support longitudinal beams 12, anchor rods are driven into the roadway roof within the top anchor net laying space 6 on the temporary support device 5.

[0028] The net lifting mechanism 3 provided at both ends of the anchor net support frame 2 is composed of vertically arranged lifting plug posts 14. The upper ends of the lifting plug posts 14 are hinged to the ends of the net support beams 11 of the anchor net support frame 2, and the lower ends of the lifting plug posts 14 are movably inserted into the lifting plug sleeves 15 provided on the sides of the temporary support device 5. In addition, the lower ends of the net support hydraulic cylinders 16 used to drive the extension and retraction of the lifting plug posts 14 are hinged to the outer sides of the lifting plug sleeves 15, and the upper ends of the net support hydraulic cylinders 16 are hinged to the lower sides of the ends of the net support beams 11. The extension and retraction of the net support hydraulic cylinders 16 drive the anchor net support frame 2 to reciprocate along the lifting plug posts 14 at both ends and within the lifting plug sleeves 15, thereby achieving stable support for the top anchor net and facilitating the installation of the anchor rods.

[0029] An auxiliary clamping mechanism 4 is also provided at the rear end of the finger shield 1, at the rear edge of the top anchor net laying space 6. The auxiliary clamping mechanism 4 includes several groups of equidistantly arranged clamping beams 17 in the transverse direction, and the positions of the clamping beams 17 correspond to the positions of the finger-shaped protrusions 9 on the finger shield 1. One end of the compression beam 17 is hinged to the upper part of the temporary support device 5, and the other end of the compression beam 17 is hinged to the telescopic end of the beam hydraulic cylinder 18, and the fixed end of the beam hydraulic cylinder 18 is hinged to the upper part of the temporary support device 5 and the position below the compression beam 17; and then the expansion and contraction of the beam hydraulic cylinder 18 is used to drive the compression beam 17 to swing up and down, thereby pressing the end of the extended end of the finger shield guard plate 1 and the edge of the top anchor net; thereby the auxiliary clamping mechanism 4 is used to support the end of the extended end of the finger shield guard plate 1 to prevent deformation of the guard plate and ensure the temporary support effect of the tunnel roof; at the same time, the auxiliary clamping mechanism 4 can also assist in clamping the edge of the top anchor net in the top anchor net laying space 6 to improve the laying effect of the overlapping parts between each anchor net.

[0030] In order to ensure that the auxiliary clamping mechanism 4 is firmly installed on the temporary support device 5, the auxiliary clamping mechanism 4 is connected to the upper part of the temporary support device 5 through a clamping beam 20, and a plurality of groups of clamping beams 19 are arranged at equal intervals in the transverse direction on the top of the clamping beam 20, and an anchor avoidance interval 21 is provided between two adjacent groups of clamping beams 19. One end of the clamping beam 17 is hinged to the front end of the clamping beam 19 at the corresponding position, and the fixed end of the cantilever hydraulic cylinder 18 is hinged to the front side of the clamping beam 20; while maintaining a firm connection, the anchor avoidance interval 21 provided between the clamping beams 19 can avoid the anchor ends and anchor plates exposed outside the tunnel roof, thereby avoiding damage to the permanent support structure that has been formed.

[0031] The temporary support device 5 can be constructed from a front shield body 28 and a rear shield body 29, with the rear shield body 29 located behind the front shield body 28. The front shield body 28 includes a front shield top beam 35, with front shield support boxes disposed on either side of the front shield top beam 35. The front shield support boxes include an upper front shield box 32 and a lower front shield box 33. A front shield lifting mechanism 34, consisting of a front shield lifting hydraulic cylinder and a front shield lifting guide mechanism, is disposed between the upper and lower front shield boxes 32, 33. The ends of the front shield top beam 35 are connected to the upper front shield boxes 32 on either side via the top beam connection 23. Furthermore, the shield plate connection 8 of the finger shield plate 1 is connected to the rear of the front shield top beam 35 of the front shield body 28. The anchor net support frame 2 is located within the top anchor net laying space 6 above the front shield body 28. The lifting sockets 15 of the net support lifting mechanism 3 are mounted on the inner sides of the front shield upper box 32 on both sides of the front shield body 28. The lifting sockets 14 at both ends of the anchor net lifting frame 2 are movably inserted into the lifting sockets 15 inside the front shield upper box 32. Several sets of telescopic front beams 24 are also installed at the front end of the front shield top beam 35 of the front shield body 28. The telescopic front beams 24 movably insert into the telescopic slots at the front end of the front shield top beam 35. Telescopic beam hydraulic cylinders 25 are respectively installed between the front shield top beam 35 and the telescopic front beams 24. A top guard 26 is hingedly mounted at the front end of the telescopic front beams 24, and a guard hydraulic cylinder 27 is installed between the top guard 26 and the telescopic front beams 24. The telescopic front beams 24 and the top guard 26 at their front ends are used to increase the support range of the front end of the temporary support device 5.

[0032] The rear shield 29 includes a top beam 39, flanked by two support boxes. These boxes include an upper box 36 and a lower box 37. A rear shield lift mechanism 38, consisting of a hydraulic cylinder and a guide mechanism, is located between the upper and lower boxes 36 and 37. The top beam 39 of the rear shield 29 is composed of several sets of longitudinal beams spaced evenly apart in the transverse direction. The spacing between the longitudinal beams allows for the avoidance of anchor rod ends and anchor plates exposed outside the tunnel roof. This prevents damage to the permanent support structure as the rear shield 29 moves forward and repeatedly supports tunneling operations. The top beams of the front and rear shields 28 and 29, along with the support boxes on either side, form an internal working space 31. The front and rear shields 28 and 29 are connected by a push mechanism 30. The shield lifting mechanism provided on both sides of the front shield body 28 and the rear shield body 29 and between the upper and lower split structures of the support box forms support for the top plate of the tunneling tunnel and drives the front shield top beam 35 and the rear shield top beam 39 to rise and fall to adapt to the height and shape of the top plate of the tunneling tunnel; and, by utilizing the cooperation of the shield lifting mechanism (the front shield lifting mechanism 34 and the rear shield lifting mechanism 38) and the pushing mechanism 30, the temporary support device 5 and the tunnel laying auxiliary device thereon can cooperate with the tunneling operation, realize the parallel operation of tunneling and permanent support, and improve the tunneling efficiency.

[0033] Bottom shields 40 are installed between the front shield lower boxes 33 on either side of the front shield body 28 of the temporary support device 5, and between the rear shield lower boxes 37 on either side of the rear shield body 29. Several groups of top anchor bolters 42 are installed on the bottom shield 40 and connected to the bottom shield 40 via a drilling rig connecting frame 44. Side anchor bolters 41 are also installed in front of the rear shield upper boxes 36 on either side of the rear shield body 29, located between the front and rear shield bodies 28 and 29. Depending on specific usage requirements, the side anchor bolters 41 can also be installed on the bottom shield 40. Thus, the anchor drilling rig can move synchronously with the temporary support device 5, making it convenient to carry out permanent support operations on the tunnel roof and the two sides of the tunnel at the rear of the front shield top beam 35 and between the front shield body 28 and the rear shield body 29, so as to achieve seamless connection between temporary support and permanent support operations, improve operation efficiency, ensure the quality of tunnel support, and ensure the safety of operations.

[0034] When the tunnel laying auxiliary device is used ( Figure 7Taking the structure of the temporary support device 5 in the figure as an example), first, the finger shield guard plate 1 is connected to the rear part of the front shield top beam 35 of the front shield body 28 through the guard plate connecting portion 8; and the anchor net lifting frame 2 is located in the top anchor net laying space 6 on the upper part of the front shield body 28. At the same time, the lifting plug-in columns 14 of the net lifting mechanism 3 at both ends of the anchor net lifting frame 2 are movably inserted into the lifting plug-in sleeves 15 on the inner side of the front shield upper box 32; the auxiliary clamping mechanism 4 is connected to the upper part of the front shield upper box 32 on both sides through the clamping crossbeam 20, and the clamping beam 17 of the auxiliary clamping mechanism 4 is located at the edge of the rear part of the top anchor net laying space 6 (as shown in FIG. Figure 4 shown).

[0035] After the tunnel boring machine (TBM) in front of the temporary support device 5 completes a pitch cut, the temporary support device 5's push mechanism 30 pushes the front shield 28 forward to provide temporary support for the newly excavated tunnel roof. At this point, the TBM continues to advance without stopping. The net support lifting mechanism 3 then raises the anchor net support frame 2, lifting the anchor net to be laid, located above the net support crossbeam 11 and several sets of net support longitudinal beams 12, onto the tunnel roof 45. Furthermore, the support beam hydraulic cylinder 18 drives the auxiliary clamping mechanism 4's clamping beam 17 upward to secure the ends of the finger shield 1 and the edges of the top anchor net. After the anchor net 43 to be laid is positioned, the top anchor drill 42 is used to drive the anchor rods 46 (such as the anchor rods 46) into the top anchor net laying space 6 on the temporary support device 5 through the anchor rod driving intervals 13 between the anchor net longitudinal beams 12 of the anchor net lifting frame 2 and the spacing grooves 10 of the finger shield 1. Figure 10 As shown); at the same time, the pushing mechanism 30 pulls the rear shield body 29 forward, and through the auxiliary anchor drilling rig 41 provided on the rear shield body 29, anchor nets are laid on the side walls of both sides of the tunnel in the side gap between the front shield body 28 and the rear shield body 29, and auxiliary anchor rods are installed, thereby forming permanent support for the tunnel.

[0036] After permanent support for a newly excavated tunnel is completed for one tunneling pitch (at this point, the continuously advancing tunnel boring machine has also completed another tunneling pitch), the anchor net support frame 2 is lowered, and the clamping beam 17 of the auxiliary clamping mechanism 4 is retracted. Subsequently, the pushing mechanism 30 pushes the front shield body 28 forward again, and the finger shield plate 1 on the front shield top beam 35 is withdrawn from between the anchor net 43 and the tunnel roof 45, thus starting the next cycle of temporary tunnel support and auxiliary net laying. Furthermore, as the rear shield body 29 of the temporary support device 5 rises and falls and moves forward with tunneling, several sets of longitudinal beams on the rear shield top beam 39 are used to provide a secondary compression and fixation of the anchor net in front of it and on the tunnel roof, further strengthening the laid top anchor net. During the entire operation process, the tunnel boring machine does not need to stop and can continue to cut the tunnel. The temporary support device 5 always performs temporary support synchronously with the cutting drum of the tunnel boring machine. There is no empty top in the newly excavated tunnel, which realizes the seamless connection between temporary support and permanent support when the tunnel boring machine continues to work, effectively improving work efficiency and operation safety.

Claims

1. A tunnel paving auxiliary device, comprising a finger shield plate (1), characterized in that: The finger shield guard plate (1) is connected to the supporting top beam (22) of the temporary supporting device (5), and an anchor net lifting frame (2) is provided below the finger shield guard plate (1), and a net lifting mechanism (3) is provided at both ends of the anchor net lifting frame (2), the telescopic end of the net lifting mechanism (3) is connected to the end of the anchor net lifting frame (2), and the fixed end of the net lifting mechanism (3) is connected to the side of the temporary supporting device (5); the finger shield guard plate (1) includes a guard plate body (7), one end of the guard plate body (7) is provided with a plurality of groups of finger-shaped convex plates (9), and a spacing groove (10) is provided between two adjacent groups of finger-shaped convex plates (9); the other end of the guard plate body (7) is provided with a guard plate connecting portion (8); the anchor net lifting frame (2) includes a guard plate body (7) and a guard plate connecting portion (8) provided along the horizontal direction of the lane. A net-supporting crossbeam (11) is arranged, and a plurality of groups of net-supporting longitudinal beams (12) are arranged on the net-supporting crossbeam (11) and located on one side of the anchor rod driving area, and an anchor rod driving interval (13) is provided between two adjacent groups of net-supporting longitudinal beams (12); the net-supporting lifting mechanism (3) includes a vertically arranged lifting plug column (14) and a net-supporting hydraulic cylinder (16), the upper end of the lifting plug column (14) is hinged to the end of the net-supporting crossbeam (11) of the anchor net lifting frame (2), and the lower end of the lifting plug column (14) is movably plugged into a lifting plug sleeve (15) provided on the side of the temporary support device (5); and the lower end of the net-supporting hydraulic cylinder (16) is hinged to the outer side of the lifting plug sleeve (15), and the upper end of the net-supporting hydraulic cylinder (16) is hinged to the net-supporting crossbeam (11).

2. The tunnel laying auxiliary device according to claim 1, characterized in that: It also includes an auxiliary pressing mechanism (4), which is located at one end of the finger shield plate (1) in the extension direction.

3. The tunnel laying auxiliary device according to claim 2, characterized in that: The auxiliary pressing mechanism (4) includes a plurality of pressing beams (17), one end of the pressing beam (17) is hinged to the upper part of the temporary support device (5), the other end of the pressing beam (17) is hinged to the telescopic end of the beam hydraulic cylinder (18), and the fixed end of the beam hydraulic cylinder (18) is hinged to the upper part of the temporary support device (5) and the position below the pressing beam (17).

4. The tunnel laying auxiliary device according to claim 3, characterized in that: The auxiliary clamping mechanism (4) further includes a clamping beam (20) arranged on the upper part of the temporary support device (5), and a plurality of groups of clamping beams (19) are arranged on the top of the clamping beam (20), and an anchor rod avoidance interval (21) is also provided between two adjacent groups of clamping beams (19); and one end of the clamping beam (17) is respectively hinged to the end of the clamping beam (19) at the corresponding position, and the fixed end of the beam hydraulic cylinder (18) is respectively hinged to the side of the clamping beam (20).

5. The tunnel laying auxiliary device according to claim 1, characterized in that: The temporary support device (5) includes a front shield body (28), and a rear shield body (29) is provided at the rear of the front shield body (28); the front shield body (28) includes a front shield top beam (35), and front shield support boxes are provided on both sides of the front shield top beam (35), and the front shield support box includes a front shield upper box (32) and a front shield lower box (33), and a front shield lifting mechanism (34) is provided between the front shield upper box (32) and the front shield lower box (33); the rear shield body (29) includes a rear shield top beam (39), a rear shield support box is provided on both sides of the rear shield top beam (39), and the rear shield support box includes an upper rear shield box (36) and a lower rear shield box (37), and a rear shield lifting mechanism (38) is provided between the upper rear shield box (36) and the lower rear shield box (37); the top beams of the front shield body (28) and the rear shield body (29) and the support boxes on both sides form an internal working space (31); and the front shield body (28) and the rear shield body (29) are connected by a push mechanism (30).

6. The tunnel laying auxiliary device according to claim 5, characterized in that: The finger shield plate (1) is connected to the rear of the front shield top beam (35) of the front shield body (28); the anchor net lifting frame (2) is located in the top anchor net laying space (6) on the upper part of the front shield body (28); and the fixed ends of the net lifting mechanism (3) are respectively connected to the inner sides of the front shield upper side boxes (32) on both sides of the front shield body (28).

7. The tunnel laying auxiliary device according to claim 5, characterized in that: A bottom shield (40) is provided between the front shield lower side boxes (33) on both sides of the front shield body (28), and between the rear shield lower side boxes (37) on both sides of the rear shield body (29). A top anchor drill (42) is provided on the bottom shield (40), and the top anchor drill (42) is connected to the bottom shield (40) via a drill connection frame (44).

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