Temporary tunnel supporting equipment with water jet tunnel face cutting device and supporting method

Abstract

The tunnel temporary supporting equipment with the water jet tunnel face cutting device comprises a temporary supporting frame body, a supporting mesh is arranged at the top end of the temporary supporting frame body, a moving and anchoring frame body capable of moving in the length direction of the temporary supporting frame body is arranged on the inner side of the temporary supporting frame body, and a channel part is arranged on the inner side of the moving and anchoring frame body; one end of the moving and anchoring frame body is connected with a cutting arch frame, a movable water jet cutting assembly is arranged on the cutting arch frame, the water jet cutting assembly is provided with a water jet nozzle, and the other end of the moving and anchoring frame body is provided with an assisting top arm and a sliding plate frame capable of sliding in the depth direction of a tunnel. Telescopic supporting legs are arranged at the lower ends of the moving and anchoring frame body, the temporary supporting frame body and the cutting arch frame. The problems that in an existing tunnel excavation single operation cycle, the number of working procedures is large, and the total consumed time for equipment use and connection is long are solved.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction, and in particular to temporary tunnel support equipment with a water jet tunnel face cutting device and a support method. Background Art

[0002] Abrasive water jet tunnel face contour cutting is a new technology for non-explosive tunnel excavation. Due to its limited cutting efficiency, the equipment must operate continuously for extended periods without retraction, ensuring continuous advancement to improve the efficiency of the overall excavation process. When the surrounding rock grade of a tunnel is high, a certain level of support is required for the excavated area. Traditional excavation requires strict control of the excavation advance distance, and further excavation is allowed only after the initial support work is completed.

[0003] The existing cantilever tunnel boring machine is relatively long. After excavating a certain distance, it needs to withdraw for support before it can enter construction again. There are many processes in a single operation cycle, and the total time spent on equipment use and connection is long. The degree of automation is low, resulting in low overall excavation efficiency.

[0004] There is an urgent need to reduce the connection between the operation processes, cut the face contour line, and make the face excavation, slag removal, and tunnel support independent of each other and carry out continuous construction at the same time. Summary of the Invention

[0005] The present invention provides a temporary tunnel support device and a support method with a water jet tunnel face cutting device, which solves the problems of multiple processes in a single operation cycle of existing tunnel excavation and a long total time consumption for equipment use and connection.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a temporary tunnel support equipment with a water jet face cutting device, including a temporary support frame, a supporting mesh is provided at the top of the temporary support frame, a moving and anchoring frame that can move along the length direction of the temporary support frame is provided on the inside of the temporary support frame, a channel portion is provided on the inside of the moving and anchoring frame, one end of the moving and anchoring frame is connected to a cutting arch frame, a movable water jet cutting assembly is provided on the cutting arch frame, the water jet cutting assembly is provided with a water jet nozzle, the other end of the moving and anchoring frame is provided with a power-assisting top arm and a sliding plate frame that can slide along the depth direction of the tunnel, and the lower ends of the moving and anchoring frame, the temporary support frame and the cutting arch frame are all provided with retractable support legs.

[0007] In a preferred solution, a water jet assembly track is provided on the cutting arch, and the water jet cutting assembly is slidably connected to the water jet assembly track.

[0008] In the preferred solution, the water jet cutting assembly also includes a transverse base plate, a rotating frame is provided on the transverse base plate, a tilt frame is provided on the rotating frame, one end of the tilt frame is hinged to the rotating frame, a forward extension frame is provided on the tilt frame, the water jet nozzle is provided on the forward extension frame, and a support wheel is provided on one side of the water jet nozzle.

[0009] In the preferred solution, a rotating shaft is provided at the lower end of the rotating frame, which is rotatably connected to the transverse base plate. A rotating wheel is also provided on the transverse base plate. An eccentric hole and a rocker arm are provided on the rotating wheel. One end of the rocker arm is rotatably connected to the eccentric hole, and the other end of the rocker arm is slidably connected to the rotating shaft of the rotating frame.

[0010] In a preferred solution, a liftable push rod is provided at one end of the rotating frame away from the hinged portion, an upper end of the push rod is provided with a hinged connecting rod, and the upper end of the connecting rod is hinged to the bottom end of the tilt frame.

[0011] In the preferred embodiment, a cylinder is further provided, a telescopic rod is provided at one end of the cylinder, a universal joint is provided at the ends of the telescopic rod and the cylinder away from each other, each universal joint is respectively connected to the transverse base plate and the front extension frame, and a liquid inlet and outlet connected to the interior is provided at the end of the cylinder, and a liquid storage barrel is also provided, the liquid inlet and outlet are connected to the liquid storage barrel through a pipeline, and an on-off valve is provided on the pipeline.

[0012] In the preferred solution, a curved rack is provided on the cutting arch, a transverse motor is provided on the transverse bottom plate, a driving gear is provided on the shaft end of the transverse motor, and the driving gear is meshed with the curved rack.

[0013] In the preferred solution, a linear guide frame and a first linear top cylinder are provided at the front end of the moving and anchoring frame, a sliding plate is provided at the side end of the cutting arch frame, the sliding plate is slidably connected to the linear guide frame, and one end of the first linear top cylinder is connected to the sliding plate.

[0014] In a preferred solution, a plurality of second linear jacking cylinders are provided on the movable and anchoring frame, and the ends of the second linear jacking cylinders push the temporary supporting frame.

[0015] The construction method is as follows: S1. The mobile and anchoring frames remain retracted, and the temporary support equipment is moved to the excavation site of the working surface; S2. The support mesh at the top of the temporary support frame fits the tunnel contour surface; S3, the cutting arch moves forward to close to the working surface for contour cutting; S4, crushing and slag discharging equipment enters from the channel part and performs crushing and slag discharging operations; S5. After the cutting and crushing are completed, the cutting arch is retracted, the temporary support frame moves forward, and the supporting arch is supported at the rear end of the temporary support frame; S6. Repeat steps S2-S5.

[0016] The beneficial effects of the present invention are as follows: temporary support equipment is developed, including a relatively movable double frame, a water jet cutting device is integrated at the front end, access channels for excavation and slag discharge equipment are reserved on the inside, and a lifting cylinder body that can assist in lifting the support arch frame is integrated at the rear end, so that the excavation function is divided into sections and continuous operations are performed at the same time, which not only improves the degree of industrialized construction, reduces labor and human risks, but also improves the overall excavation efficiency; the integrated water jet cutting device has a swing angle and displacement function, which can improve the cutting angle and improve the cutting efficiency; the water jet mechanism can adopt a universal follow-up support component, which can be locked at any time to assist in resisting the recoil force of the operation and reduce the impact on the swing angle mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] Figure 1 It is a side view of temporary support equipment.

[0019] Figure 2 This is a schematic diagram of the auxiliary installation support arch frame at the tail end of the temporary support equipment.

[0020] Figure 3 It is a schematic diagram of the end face of the temporary support equipment.

[0021] Figure 4 This is the bottom view of the temporary support equipment.

[0022] Figure 5 This is a structural diagram of the water jet assembly.

[0023] Figure 6 This is a back view of the water jet assembly.

[0024] Figure 7 This is the principle diagram of the water jet back support assembly follow-up.

[0025] In the figure: first linear jacking cylinder 1; second linear jacking cylinder 2; water jet cutting assembly 3; traverse base plate 301; rotating frame 302; tilt frame 303; outrigger 304; water jet nozzle 305; abutting wheel 306; traverse motor 307; drive gear 308; rotating frame shaft 309; rocker arm 310; rotating wheel 311; eccentric hole 312; jack 313; connecting rod 314; universal joint 315; cylinder 316; Telescopic rod 317; sealing piston 318; liquid inlet and outlet 319; on-off valve 320; liquid storage barrel 321; third linear top cylinder 4; sliding plate 5; linear guide frame 6; moving and anchoring frame 7; temporary support frame 8; cutting arch 9; water jet assembly track 901; curved rack 902; supporting mesh 10; channel portion 11; sliding plate frame 12; support leg 13; power-assisted top arm 14; support arch 15. DETAILED DESCRIPTION

[0026] Example 1: like Figure 1-7 In the present invention, a temporary tunnel support equipment with a water jet face cutting device includes a temporary support frame 8, a supporting mesh 10 is provided at the top of the temporary support frame 8, a moving and anchoring frame 7 which can move along the length direction of the temporary support frame 8 is provided on the inner side of the temporary support frame 8, a channel portion 11 is provided on the inner side of the moving and anchoring frame 7, one end of the moving and anchoring frame 7 is connected to a cutting arch frame 9, a movable water jet cutting assembly 3 is provided on the cutting arch frame 9, the water jet cutting assembly 3 is provided with a water jet nozzle 305, the other end of the moving and anchoring frame 7 is provided with a power-assisting top arm 14 and a sliding plate frame 12 which can slide along the depth direction of the tunnel, and the lower ends of the moving and anchoring frame 7, the temporary support frame 8 and the cutting arch frame 9 are all provided with retractable support legs 13.

[0027] The temporary support frame 8 is composed of a plurality of parallel and spaced arch frames and transverse support connecting rods welded together. The support mesh 10 is an arched surface that fits the top of the temporary support frame 8 and is welded to the top of the temporary support frame 8 to provide temporary support for the tunnel top surface.

[0028] Multiple water jet cutting assemblies 3 can be provided to improve operation efficiency.

[0029] During construction, the cutting arch frame 9 extends forward relative to the moving and anchoring frame 7, and the water jet cutting assembly 3 approaches the working surface to perform contour cutting. While the water jet cutting assembly 3 is operating, the crushing and slag discharge equipment can enter and exit through the channel portion 11, preparing for tunnel excavation operations. After the water jet cutting assembly 3 completes contour cutting, it retracts relative to the moving and anchoring frame 7. The crushing and slag discharge equipment excavates the tunnel forward a new distance. The legs 13 at the lower end of the moving and anchoring frame 7 support the ground, and the legs 13 of the temporary support frame 8 retract. The temporary support frame 8 moves forward relative to the moving and anchoring frame 7 to its position, and the support mesh 10 rests on the arch wall in the tunnel, with the legs 13 of the temporary support frame 8 supporting the ground. The loader then places the support arch 15 on the sliding plate frame 12. The sliding plate frame 12 moves forward, moving the support arch 15 to the installation position. The auxiliary lifting arm 14 passes through the hollow of the sliding plate frame 12 and assists in lifting the support arch 15 for formal support installation. After the support is completed, the auxiliary lifting arm 14 is retracted and the next cycle of operation is carried out until all construction is completed, the temporary support equipment is withdrawn, and multiple side-by-side 15s form the final support.

[0030] In a preferred solution, a water jet assembly track 901 is provided on the cutting arch 9 , and the water jet cutting assembly 3 is slidably connected to the water jet assembly track 901 .

[0031] In the preferred embodiment, the water jet cutting assembly 3 also includes a transverse base plate 301, a rotating frame 302 is provided on the transverse base plate 301, a tilt frame 303 is provided on the rotating frame 302, one end of the tilt frame 303 is hinged to the rotating frame 302, a forward extension frame 304 is provided on the tilt frame 303, a water jet nozzle 305 is provided on the forward extension frame 304, and a supporting wheel 306 is provided on one side of the water jet nozzle 305.

[0032] A clamping slider is provided on the transverse bottom plate 301 , and the clamping slider is slidably connected to the transverse bottom plate 301 .

[0033] The lower end of the outrigger 304 is slidably connected to the tilt frame 303 via a slide rail. The tilt frame 303 is L-shaped, and a linear hydraulic cylinder is provided at one end to drive the outrigger 304 to move linearly.

[0034] The mounting frame of the abutting wheel 306 can adjust the extended length. When working, the abutting wheel 306 abuts against the tunnel working surface, and the designed water jet nozzle 305 has a constant distance from the working surface.

[0035] The outrigger 304 can be extended forward for processing, and the water jet nozzle 305 can be rotated in the horizontal and vertical directions to adjust the spraying angle.

[0036] In the preferred embodiment, the lower end of the rotating frame 302 is provided with a rotating frame shaft 309 which is rotatably connected to the transverse base plate 301. The transverse base plate 301 is also provided with a rotating wheel 311, and the rotating wheel 311 is provided with an eccentric hole 312. A rocker arm 310 is also provided. One end of the rocker arm 310 is rotatably connected to the eccentric hole 312, and the other end of the rocker arm 310 is slidably connected to the rotating frame shaft 309.

[0037] Another reduction motor housing is provided at the lower end of the transverse bottom plate 301 to drive the rotating wheel 311 to rotate, and the swing arm 310 swings and drives the rotating shaft 309 to rotate, thereby adjusting the horizontal direction of the rotating frame 302.

[0038] In a preferred embodiment, a liftable top rod 313 is provided on one end of the rotating frame 302 away from the hinge portion, and a hinged connecting rod 314 is provided on the upper end of the top rod 313 . The upper end of the connecting rod 314 is hinged to the bottom end of the tilt frame 303 .

[0039] A short-stroke linear servo electric cylinder is provided at the lower end of the rotating frame 302 to drive the ejector rod 313 to move up and down.

[0040] In the preferred embodiment, a cylinder 316 is further provided, a telescopic rod 317 is provided at one end of the cylinder 316, a universal joint 315 is provided at the ends of the telescopic rod 317 and the cylinder 316 away from each other, each universal joint 315 is respectively connected to the transverse base plate 301 and the front extension frame 304, and a liquid inlet and outlet 319 connected to the interior is provided at the end of the cylinder 316, and a liquid storage barrel 321 is also provided. The liquid inlet and outlet 319 is connected to the liquid storage barrel 321 through a pipeline, and a shut-off valve 320 is provided on the pipeline.

[0041] The telescopic rod 317 is slidably connected to the cylinder 316, and a sealing piston 318 is provided at the connecting end.

[0042] Since the recoil force of the water jet nozzle 305 is large when it is working, and the water jet nozzle 305 has many inclination adjustment mechanisms and limited structural strength, simply relying on the motors to lock the angle may cause angle jitter or creep, causing the nozzle to deviate from the predetermined position.

[0043] Therefore, a support assembly is installed between the forward outrigger 304 and the transverse base plate 301. When adjusting the angle of the water jet nozzle 305, the on-off valve 320 is opened, allowing the liquid in the liquid storage barrel 321 to freely enter the inner cavity of the cylinder 316. The angle and total length of the cylinder 316 and the telescopic rod 317 change with the position of the water jet nozzle 305. When the water jet nozzle 305 is adjusted to the correct position, the on-off valve 320 is closed. Since the inner cavity of the cylinder 316 is filled with liquid, the extension length of the telescopic rod 317 is locked. The recoil force of the water jet nozzle 305 is partially transferred to the transverse base plate 301 by the support assembly, reducing the force on each angle adjustment mechanism and stabilizing the position of the water jet nozzle 305.

[0044] In the preferred embodiment, a curved rack 902 is provided on the cutting arch 9 , a transverse motor 307 is provided on the transverse base plate 301 , and a driving gear 308 is provided on the shaft end of the transverse motor 307 , which is engaged with the curved rack 902 .

[0045] In the preferred solution, a linear guide frame 6 and a first linear top cylinder 1 are provided at the front end of the moving and anchoring frame 7, and a sliding plate 5 is provided at the side end of the cutting arch frame 9. The sliding plate 5 is slidably connected to the linear guide frame 6, and one end of the first linear top cylinder 1 is connected to the sliding plate 5.

[0046] The cylinder body of the first linear jacking cylinder 1 is installed on the moving and anchoring frame 7, and the end of the cylinder rod is connected to the sliding plate 5 to drive the cutting arch 9 to extend or retract.

[0047] In a preferred solution, a plurality of second linear jacking cylinders 2 are provided on the movable and anchoring frame 7 , and the ends of the second linear jacking cylinders 2 push the temporary supporting frame 8 .

[0048] A third linear jacking cylinder 4 is also installed on the moving and anchoring frame 7. The cylinder rod end of the third linear jacking cylinder 4 is connected to the sliding plate frame 12. The sliding plate frame 12 is clamped on the guide rail of the tail frame of the moving and anchoring frame 7 and moves.

[0049] Example 2: A temporary support device based on abrasive water jet tunnel face contour cutting includes the following core structures: 1. Abrasive water jet cutting equipment: Arranged on a gantry-type mechanism at the front of the equipment, the track where multiple abrasive water jet nozzles are located divides the gantry into multiple sections. Each nozzle can move at a defined speed on the track. At the same time, the nozzle has the ability to adapt to the target distance, adjust the pitch angle and incident angle, and extend and retract radially along the tunnel face.

[0050] 2. Sliding mechanism: The upper end of the water jet gantry is connected to the support frame. A sliding rail with a certain strength and lockable function is provided inside the support frame to realize the extension, fixation and retraction of the water jet gantry.

[0051] 3. Support frame: It is a frame structure. The top and some sides of the frame are arranged with meshes that adapt to the tunnel section. It is the main structure of temporary support to prevent rock collapse in the tunnel section, resist certain surrounding rock deformation, and prevent debris from falling and injuring people or damaging other excavation equipment. The bottom is supported by multiple sets of telescopic legs.

[0052] 4. Hydraulic jacking mechanism: Located inside the support frame, it consists of multiple groups of oil cylinders, connecting the support frame and the moving and anchoring frames, and plays a moving function during walking.

[0053] 5. Mobile and anchoring frame: It is a frame structure, slightly smaller than the supporting frame. The top is connected to the oil cylinder, the bottom is supported by multiple sets of telescopic legs, and two arch-anchor integrated robotic arms are arranged at the tail.

[0054] 6. Telescopic legs: with support and leveling functions to adapt to rugged terrain.

[0055] 7. Arch-anchor integrated robotic arm: responsible for hanging nets and anchor drilling when the surrounding rock grade is low; responsible for erecting arch frames, hanging nets and anchor drilling when the surrounding rock grade is high.

[0056] 8. Space inside the frame: The two-layer frame is a spacious working space where excavation and slag discharge equipment can be arranged and work can continue without stopping.

[0057] The difference from the existing technology is that: through the double frame, hydraulic jacking, telescopic legs, and telescopic gantry, the face excavation, temporary support, and arch anchor initial support are coordinated in the assembly line operation, and the processes do not interfere with each other and operate continuously, thereby improving construction efficiency.

[0058] The support method of temporary support equipment is: divide the equipment into three areas according to the longitudinal layout of the equipment, namely the tunnel face excavation area, the temporary support and crushing slag area, and the primary support area.

[0059] 1. The water jet cutting gantry is kept retracted using a sliding device, and the inner and outer frames are kept overlapping using a hydraulic jacking cylinder. At this time, the entire temporary support equipment is at its minimum length, making it easy to transport to the tunnel to be constructed.

[0060] 2. When the support equipment moves close to the excavation face, the support frame will lower the telescopic legs to the bottom of the tunnel and adjust the height until the support mesh fits the tunnel contour.

[0061] 3. After the frame completes temporary support and fits the tunnel wall, the water jet cutting gantry is extended from the sliding device and brought close to the tunnel face. Then, four abrasive water jet nozzles cut the tunnel face contour from bottom to top.

[0062] 4. While the face contour is being cut, the face crushing and slag discharge equipment enters from the middle space of the frame and approaches the face to perform face crushing and slag discharge operations. The crushing gradually moves from the middle of the face to both sides.

[0063] 5. After the face completes a cycle of cutting and crushing, the cutting gantry is retracted into the frame by the sliding mechanism, and the support frame legs are retracted. At this time, the legs of the mobile and anchoring frames are responsible for supporting the entire support equipment on the ground, and then the hydraulic cylinder pushes the support frame forward step by step, approaching the face of the next cycle.

[0064] 6. After the support frame is in place, the telescopic legs are extended again and the height is adjusted until the support mesh fits the tunnel contour. The cutting gantry is extended to carry out the next cycle of face excavation. At the same time, the moving and anchoring frames are started to erect the arch frame, hang the mesh and drill the anchor bolts.

[0065] 7. Then repeat the above steps until the entire tunnel excavation operation is completed.

[0066] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A temporary tunnel support device with a water jet face cutting device, characterized by: The invention comprises a temporary support frame (8), a support mesh (10) is provided at the top of the temporary support frame (8), a moving and anchoring frame (7) movable along the length direction of the temporary support frame (8) is provided on the inner side of the temporary support frame (8), a channel portion (11) is provided on the inner side of the moving and anchoring frame (7), one end of the moving and anchoring frame (7) is connected to a cutting arch frame (9), a movable water jet cutting assembly (3) is provided on the cutting arch frame (9), and the water jet cutting assembly (3) is provided with a water jet nozzle (305), the other end of the moving and anchoring frame (7) is provided with a power-assisting top arm (14) and a sliding plate frame (12) movable along the depth direction of the tunnel, and the lower ends of the moving and anchoring frame (7), the temporary support frame (8) and the cutting arch frame (9) are all provided with retractable legs (13).

2. The temporary tunnel support equipment with a water jet face cutting device according to claim 1 is characterized by: A water jet assembly track (901) is provided on the cutting arch (9), and the water jet cutting assembly (3) is slidably connected to the water jet assembly track (901).

3. The temporary tunnel support equipment with a water jet face cutting device according to claim 2 is characterized by: The water jet cutting assembly (3) further comprises a transverse bottom plate (301), a rotating frame (302) is provided on the transverse bottom plate (301), a tilting frame (303) is provided on the rotating frame (302), one end of the tilting frame (303) is hinged to the rotating frame (302), a forward extending frame (304) is provided on the tilting frame (303), a water jet nozzle (305) is provided on the forward extending frame (304), and a supporting wheel (306) is provided on one side of the water jet nozzle (305).

4. The temporary tunnel support equipment with a water jet face cutting device according to claim 3 is characterized by: The lower end of the rotating frame (302) is provided with a rotating frame shaft (309) that is rotatably sleeved with the transverse bottom plate (301), and the transverse bottom plate (301) is further provided with a rotating wheel (311), the rotating wheel (311) is provided with an eccentric hole (312), and a swing rod (310) is further provided. One end of the swing rod (310) is rotatably plugged into the eccentric hole (312), and the other end of the swing rod (310) is slidably plugged into the rotating frame shaft (309).

5. The temporary tunnel support equipment with a water jet face cutting device according to claim 3 is characterized by: A liftable push rod (313) is provided at one end of the rotating frame (302) away from the hinged portion. A hinged connecting rod (314) is provided at the upper end of the push rod (313). The upper end of the connecting rod (314) is hinged to the bottom end of the tilt frame (303).

6. The temporary tunnel support equipment with a water jet face cutting device according to claim 3 is characterized by: A cylinder (316) is also provided, and a telescopic rod (317) is provided at one end of the cylinder (316). A universal joint (315) is provided at the ends of the telescopic rod (317) and the cylinder (316) that are separated from each other. Each universal joint (315) is respectively connected to the transverse bottom plate (301) and the front extension frame (304). A liquid inlet and outlet (319) communicating with the interior is provided at the end of the cylinder (316). A liquid storage barrel (321) is also provided. The liquid inlet and outlet (319) is communicated with the liquid storage barrel (321) through a pipeline, and an on-off valve (320) is provided on the pipeline.

7. The temporary tunnel support equipment with a water jet face cutting device according to claim 2, characterized in that: A curved rack (902) is provided on the cutting arch (9), a transverse movement base plate (301) is provided with a transverse movement motor (307), a drive gear (308) is provided at the shaft end of the transverse movement motor (307), and the drive gear (308) is meshed with the curved rack (902).

8. The temporary tunnel support equipment with a water jet face cutting device according to claim 1 is characterized by: A linear guide frame (6) and a first linear top cylinder (1) are provided at the front end of the moving and anchoring frame (7); a sliding plate (5) is provided at the side end of the cutting arch frame (9); the sliding plate (5) is slidably connected to the linear guide frame (6); and one end of the first linear top cylinder (1) is connected to the sliding plate (5).

9. The temporary tunnel support equipment with a water jet face cutting device according to claim 1, characterized in that: A plurality of second linear jacking cylinders (2) are provided on the moving and anchoring frame (7), and the ends of the second linear jacking cylinders (2) push the temporary supporting frame (8).

10. The method for supporting temporary tunnel support equipment with a water jet face cutting device according to claim 1, characterized in that: S1, the moving and anchoring frame (7) remains in a retracted state, and the temporary support equipment is moved to the excavation site of the working surface; S2, the supporting mesh (10) at the top of the temporary supporting frame (8) fits the tunnel contour surface; S3, the cutting arch (9) moves forward to close to the working surface for contour cutting; S4, the crushing and slag discharging equipment enters through the channel portion (11) and performs crushing and slag discharging operations; S5, after the cutting and crushing are completed, the cutting arch frame (9) is retracted, the temporary support frame (8) moves forward, and the supporting arch frame (15) is supported at the rear end of the temporary support frame (8); S6. Repeat steps S2-S5.

Images