Large-section TBM (Tunnel Boring Machine) multi-stage cutterhead for high-pressure water jet joint cutting to assist rock breaking

Abstract

The invention discloses a large-section TBM multi-stage cutter head for high-pressure water jet joint cutting assisted rock breaking. The large-section TBM multi-stage cutter head comprises a cutter head system, a high-pressure water jet coupling system, a cutter head rotating system, a cutter head propelling system and a cutter head supporting frame. The cutterhead system comprises a central cutterhead, an edge cutterhead and a blind area cutterhead, and the central cutterhead and the edge cutterhead are both circular. The edge cutterheads are arranged on the periphery of the center cutterheads, the blind area cutterheads are arranged in blind areas between the center cutterheads and the edge cutterheads, and each center cutterhead and each edge cutterhead are each provided with a plurality of high-pressure water jet coupling systems. The cutting depth and the cutting range of the water jet are effectively increased, the rock breaking capacity is improved, the TBM hob rock breaking efficiency is improved, and the technical progress of coupling high-pressure water jet TBM equipment manufacturing is promoted.

Description

Technical Field

[0001] The invention relates to the field of tunnel engineering, and in particular to a large-section TBM multi-stage cutterhead for assisting rock breaking by high-pressure water jet cutting. Background Art

[0002] When a tunnel boring machine (TBM) is excavating in extremely hard rock with a uniaxial compressive strength of more than 160-180 MPa, the cutter penetration is usually less than 2 mm, the rock breaking efficiency is sharply reduced, and the cutter replacement cost is significantly increased, which seriously restricts the rapid excavation performance of the TBM. There is limited room for improving the rock breaking efficiency by improving the cutter ring strength, shape, and cutterhead or cutter arrangement, and a new method of assisting TBM cutter rock breaking is urgently needed.

[0003] At present, the highest water jet pressure used in engineering projects is 300 MPa, and the TBM cutterhead rotation speed is usually 3-5 r / min. However, when the cutterhead speed is too fast or the excavation radius is too large, the linear speed of the water jet nozzle installed on the cutterhead will also increase sharply, which will lead to a rapid decrease in the hydraulic cutting depth, and the role of water jet cutting in assisting rock breaking cannot be fully utilized, thus limiting the function of high-pressure water jet assisting rapid rock breaking. Moreover, the total thrust and total torque of the cutterhead required for large-section TBM excavation in extremely hard rock also increase sharply. Summary of the invention

[0004] In order to solve the problems of difficult and slow excavation of large-section TBMs in extremely hard rock, the present invention proposes a large-section TBM multi-stage cutterhead with high-pressure water jet cutting to assist in rock breaking. A small-diameter multi-stage sub-cutterhead is independently configured with a high-pressure water jet coupling system. Each sub-cutterhead rotates around its own rotation center to break rocks. The cutterhead rotation speed can be increased in the case of large-section extremely hard rock and a deeper water jet cutting depth can be obtained at the same time, thereby achieving efficient water jet cutting to assist the roller cutter in rock breaking.

[0005] The present application discloses a large-section TBM multi-stage cutterhead for high-pressure water jet cutting and auxiliary rock breaking, including a cutterhead system, a high-pressure water jet coupling system, a cutterhead rotation system, a cutterhead propulsion system and a cutterhead support frame; The cutter disc system includes a central cutter disc, an edge cutter disc and a blind area cutter disc, and the central cutter disc and the edge cutter disc are both circular. The edge cutter disc is arranged around the central cutter disc, and the blind area cutter disc is arranged in the blind area between the central cutter disc and the edge cutter disc, and each central cutter disc and the edge cutter disc is provided with a plurality of high-pressure water jet coupling systems.

[0006] Preferably, the center cutter disc and the edge cutter disc both include a circular cutter disc panel, a center cutter is disposed at the center of the cutter disc panel, and positive cutters are disposed from the outermost side of the center cutter outwards along the same radial line at the farthest distance to the edge of the cutter disc.

[0007] Preferably, the center cutter is a double-edged cutter, which is installed in parallel at the center of each cutter head panel to crush the rocks in the center area of ​​the cutter head; the positive cutter is a single-edged cutter, and the cutter arrangement can be in the form of a cross, star, double spiral or quadruple spiral. Each cutter only cuts one rolling mark on the excavation surface, and is used to crush most of the rocks in the excavation section.

[0008] Preferably, a plurality of scraping openings are provided on the lowest edge cutter disc for cleaning the accumulated debris that falls by its own weight when the roller cutters on the central cutter disc and all edge cutter discs break rocks.

[0009] Preferably, the blind area cutterhead includes a rectangular panel, a blind area positive cutter and a blind area side cutter. The blind area positive cutter is arranged on the rectangular panel near the center cutterhead, and is used to cut the unbroken area between the center cutterhead and the edge cutterhead, and the area between the edge cutterheads far from the excavation contour boundary. The blind area side cutters are arranged at both ends of the rectangular panel, and are used to cut the rock area between the edge cutterhead and the excavation contour, and mainly control the geometric shape of the excavation contour boundary. The blind area side cutters are arranged with a gradually decreasing angle from the end of the rectangular panel to the excavation contour boundary.

[0010] Preferably, the high-pressure water jet coupling system includes a plurality of water jet nozzles arranged on the front of the cutter disc panel, a single-nozzle high-pressure metal tube connected to each water jet nozzle is arranged on the back of the cutter disc panel, and the plurality of single-nozzle high-pressure metal tubes are connected to a single-nozzle flow control valve, and the single-nozzle flow control valve is connected to the centralized inlet metal tube and the swivel joint in turn.

[0011] Preferably, the cutter disc rotation system includes a center cutter disc rotation system, an edge cutter disc rotation system and a blind area cutter disc rotation system; The central cutter disc rotation system comprises a central cutter disc flange, a central cutter disc main bearing, a central cutter disc drive motor and a central cutter disc reduction box, wherein the central cutter disc flange is arranged on the back of the central cutter disc and connected to the central cutter disc main bearing, the central cutter disc main bearing is connected to the central cutter disc drive motor, and the central cutter disc drive motor is connected to the central cutter disc reduction box; The edge cutter disc rotation system includes an edge cutter disc flange, an edge cutter disc main bearing, an edge cutter disc drive motor and an edge cutter disc reduction box, wherein the edge cutter disc flange is arranged on the back of the edge cutter disc and connected to the edge cutter disc main bearing, the edge cutter disc main bearing is connected to the edge cutter disc drive motor, and the edge cutter disc drive motor is connected to the edge cutter disc reduction box; The blind area cutter disc rotation system comprises a rectangular panel support frame and a fixed sleeve. The rectangular panel support frame is arranged on the back of the rectangular panel and connected to the fixed sleeve. The fixed sleeve is connected to the main bearing of the central cutter disc.

[0012] Preferably, the cutter disc propulsion system includes a center cutter disc propulsion cylinder connected to the center cutter disc, an edge cutter disc propulsion cylinder connected to the edge cutter disc, and a support frame propulsion cylinder connected to the cutter disc support frame.

[0013] Preferably, the center cutter disc main bearing, the edge cutter disc main bearing, the sleeve, the center cutter disc propulsion cylinder and the edge cutter disc propulsion cylinder are all connected to the cutter disc support frame.

[0014] Preferably, a shield is provided outside the cutter disc rotation system and the cutter disc propulsion system to protect the cutter disc rotation system and the cutter disc propulsion system.

[0015] Beneficial effects of the present invention: (1) A multi-stage cutter disc is adopted, in which the central cutter disc and the edge cutter disc coupled with the high-pressure water jet rotate around their respective rotation centers. Compared with the integral cutter disc, the linear velocity of the water jet nozzle far away from the rotation center is significantly reduced, thus avoiding the energy waste caused by the excessive linear velocity of the water jet and effectively increasing the cutting depth and cutting range of the water jet.

[0016] (2) The independent excavation mode of the center cutterhead and the edge cutterhead. The increase in the cutting depth of the water jet promotes the rock breaking ability of the cutter. In addition, the holes created by the edge cutterhead before excavation can become the free surface for the adjacent edge cutterhead and the center cutterhead to break the rock, which can further improve the rock breaking efficiency of the TBM cutter. The blind area cutterhead located behind the center cutterhead and the edge cutterhead can break the rock area that the center cutterhead and the edge cutterhead cannot break, thus controlling the excavation profile and design section of the entire tunnel.

[0017] (3) The increase in the cutting depth of the full-section water jet in the tunnel and the increase in the rock breaking area of ​​the auxiliary cutter have effectively improved the rock breaking efficiency of the large-section cutter in extremely hard rock and the geological adaptability of TBM excavation, and promoted the technological progress of the manufacturing of coupled high-pressure water jet TBM equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of a cutter head system according to an embodiment of the present invention; Figure 2 A schematic diagram of the arrangement of a high-pressure water jet system according to an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a cutter disc rotating system and a cutter disc propulsion system according to an embodiment of the present invention; Figure 4 A schematic diagram of crack propagation in rock breaking by a double-side slit roller cutter according to an embodiment of the present invention; Figure 5 Schematic diagram of crack propagation of rock breaking by a roller cutter above the cutting seam in an embodiment of the present invention.

[0019] The reference numerals are as follows: 1-Center cutter disc, 2-Edge cutter disc, 3-Cutter disc panel, 4-Center roller, 5-Positive roller, 6-Scraping mouth, 7-Blind area cutter disc, 8-Rectangular panel, 9-Blind area positive roller, 10-Blind area between center cutter disc and edge cutter disc, 11-Excavation contour boundary, 12-Blind area between edge cutter disc and excavation boundary, 13-Blind area side roller, 14-Water jet nozzle, 15-Single nozzle high pressure metal pipe, 16-Single nozzle flow control valve, 17-Central inlet metal pipe, 18 -swivel joint, 19-center cutter disc flange, 20-center cutter disc main bearing, 21-center cutter disc drive motor, 22-center cutter disc reducer, 23-edge cutter disc flange, 24-edge cutter disc main bearing, 25-edge cutter disc drive motor, 26-edge cutter disc reducer, 27-rectangular panel bracket, 28-fixing sleeve, 29-cutter disc support frame, 30-center cutter disc propulsion cylinder, 31-edge cutter disc propulsion cylinder, 32-support frame propulsion cylinder, 33-shield. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and examples.

[0021] The embodiment of the present application discloses a large-section TBM multi-stage cutterhead for high-pressure water jet cutting and auxiliary rock breaking, including a cutterhead system, a high-pressure water jet coupling system, a cutterhead rotation system, a cutterhead propulsion system and a cutterhead support frame 29.

[0022] like Figure 1 As shown, the cutter disc system includes a central cutter disc 1, an edge cutter disc 2 and a blind area cutter disc 7. The central cutter disc 1 and the edge cutter disc 2 are both circular. Six edge cutter discs 2 are arranged around the central cutter disc 1. The blind area cutter disc 7 is arranged in a blind area 10 between the central cutter disc 1 and the edge cutter disc 2. Each central cutter disc 1 and the edge cutter disc 2 are provided with multiple high-pressure water jet coupling systems.

[0023] The center cutter disc 1 and the edge cutter disc 2 both include a circular cutter disc panel 3. A center roller 4 is arranged at the center of the cutter disc panel 3. The center roller 4 is a double-edged roller and is installed in parallel at the center of each cutter disc panel 3 to crush the rock in the center area of ​​the cutter disc. From the outermost side of the center roller 4, the positive roller 5 is arranged in sequence outward according to the farthest distance on the same radial line to the edge of the cutter disc. The positive roller 5 is a single-edged roller. The arrangement of the positive roller 5 can be in the shape of a cross, a star, a double spiral or a quadruple spiral. Each roller cuts only one rolling mark on the excavation surface and is used to crush most of the rocks in the excavation section. A plurality of scraping openings 6 are arranged on the bottom edge cutter disc 2, which are connected to the cutter disc panel 3 of the edge cutter disc 2. The scraping openings 6 are used to clean up the accumulated debris that falls by its own weight when the rollers on the center cutter disc 1 and all edge cutter discs 2 break the rock.

[0024] The blind area cutter disc 7 includes a rectangular panel 8, a blind area positive cutter 9 and a blind area side cutter 13. The blind area positive cutter 9 is arranged on the rectangular panel 8 near the center cutter disc 1, and is used to cut rocks in the blind area 10 between the center cutter disc and the edge cutter disc, and the area between the edge cutter discs 2 and the edge cutter discs 2 far from the excavation contour boundary 11. The cutter spacing is slightly larger than or close to the 80-90mm cutter spacing of normal cutter rock breaking. In this embodiment, the cutter spacing is 100-130mm. The blind area side cutters 13 are arranged at both ends of the rectangular panel 8, and are used to cut rocks in the blind area 12 between the edge cutter disc and the excavation contour boundary, and mainly control the geometric shape of the excavation contour boundary. The blind area side cutters 13 are arranged with an angle gradually decreasing from the end of the rectangular panel 8 to the excavation contour boundary 11. The cutter spacing is smaller than the 80-90mm cutter spacing of normal cutter rock breaking. In this embodiment, the cutter spacing is gradually reduced from 75mm to 40mm.

[0025] like Figure 2 As shown, the high-pressure water jet coupling system includes a plurality of water jet nozzles 14 arranged on the front of the cutter head panel 3, which are used to spray high-pressure water jets. A single-nozzle high-pressure metal pipe 15 for water delivery connected to each water jet nozzle 14 is arranged on the back of the cutter head panel 3. The plurality of single-nozzle high-pressure metal pipes 15 are connected to a single-nozzle flow control valve 16 for controlling the flow of the single nozzle, and the single-nozzle flow control valve 16 is connected to the centralized inlet metal pipe 17 and the swivel joint 18 in turn. The swivel joint 18 is connected to the external booster pump through the high-pressure metal pipe, which is used to release the torque in the metal pipeline during the rotation of the cutter head.

[0026] The structure of the cutter disc rotation system and the cutter disc propulsion system is as follows: Figure 3 As shown. The cutter disc rotation system includes a center cutter disc rotation system, an edge cutter disc rotation system and a blind area cutter disc rotation system. The center cutter disc rotation system includes a center cutter disc flange 19, a center cutter disc main bearing 20, a center cutter disc drive motor 21 and a center cutter disc reduction box 22. The center cutter disc flange 19 is arranged on the back of the center cutter disc 1 and is connected to the center cutter disc main bearing 20. The center cutter disc 1 is fixed on the center cutter disc main bearing 20 through the center cutter disc flange 19, and the center cutter disc main bearing 20 drives the center cutter disc 1 to rotate. The center cutter disc main bearing 20 is connected to the center cutter disc drive motor 21 through gears, and the center cutter disc drive motor 21 is used to provide the rotational torque of the center cutter disc 1. The center cutter disc drive motor 21 is connected to the center cutter disc reduction box 22, and the center cutter disc reduction box 22 is used to control and adjust the output speed.

[0027] The edge cutter disc rotation system includes an edge cutter disc flange 23, an edge cutter disc main bearing 24, an edge cutter disc drive motor 25 and an edge cutter disc reduction box 26. The edge cutter disc flange 23 is arranged on the back of the edge cutter disc 2 and connected to the edge cutter disc main bearing 24. The edge cutter disc 2 is fixed on the edge cutter disc main bearing 24 through the edge cutter disc flange 23, and the edge cutter disc main bearing 24 drives the edge cutter disc 2 to rotate. The edge cutter disc main bearing 24 is connected to the edge cutter disc drive motor 25 through a gear, and the edge cutter disc drive motor 25 is used to provide a rotational torque of the edge cutter disc 2. The edge cutter disc drive motor 25 is connected to the edge cutter disc reduction box 26, and the edge cutter disc reduction box 26 is used to control and adjust the output speed.

[0028] The blind area cutter disc rotation system includes a rectangular panel support frame 27 and a fixed sleeve 28. The rectangular panel support frame 27 is arranged on the back of the rectangular panel 8 and connected to the fixed sleeve 28. The fixed sleeve 28 is connected to the central cutter disc main bearing 20. The blind area cutter disc 7 and the central cutter disc 1 share the central cutter disc main bearing 20.

[0029] The cutter disc propulsion system includes a central cutter disc propulsion cylinder 30 connected to the central cutter disc 1, an edge cutter disc propulsion cylinder 31 connected to the edge cutter disc 2, and a support frame propulsion cylinder 32 connected to the cutter disc support frame 29. The central cutter disc propulsion cylinder 30 is used to provide the jacking of the central cutter disc 1, the edge cutter disc propulsion cylinder 31 is used to provide the individual jacking of each edge cutter disc 2, and the support frame propulsion cylinder 32 is used to provide the stepping of the entire cutter disc support frame 29 and all cutter discs. The central cutter disc main bearing 20, the edge cutter disc main bearing 24, the sleeve 28, the central cutter disc propulsion cylinder 30 and the edge cutter disc propulsion cylinder 31 are all connected to the cutter disc support frame 29, and the cutter disc support frame 29 is used to fix the central cutter disc main bearing 20, the edge cutter disc main bearing 24 and the sleeve 28, and provide reaction force for the central cutter disc propulsion cylinder 30 and the edge cutter disc propulsion cylinder 31.

[0030] A shield 33 is provided outside the cutter disc rotating system and the cutter disc propulsion system, and the cutter disc rotating system and the cutter disc propulsion system work under the protection of the shield 33.

[0031] The working principle of the large-section TBM multi-stage cutter disc for high-pressure water jet slitting and assisted rock breaking disclosed in the present application is described below in conjunction with the accompanying drawings. The center cutter disc 1 and each edge cutter disc 2 rotate around their respective rotation centers to break rocks. When breaking rocks, the high-pressure water jet first cuts the hard rock of the face into slits, and then the rollers roll along the water jet slitting path or in the middle of the water jet slitting paths on both sides to break rocks. Since the large cross-section is decomposed into multiple small-diameter cutter discs, the reduction in the installation radius of the water jet greatly increases the cutting depth of the water jet. According to the arrangement position of the water jet and the roller, there are two rock breaking principles. One is when the water jet nozzles 14 are located on both sides of the roller, such as Figure 4As shown in the figure, the crack below the roller cutter extends obliquely to the edge of the cut. The water jet cut serves as a free surface facing the air and relieves the confining pressure in the surrounding rock. It also blocks the crack from extending to the deep part. The deeper the depth, the more conducive it is to breaking the rock. Figure 5 As shown, the water jet cutting seam coincides with the roller cutter path, and the roller cutter penetrates along the cutting seam. The rocks on both sides of the cutting seam are peeled off and damaged, and there is an open gap, which makes it easier for the roller cutter to penetrate the rock.

[0032] The working steps of the large-section TBM multi-stage cutterhead for high-pressure water jet cutting and rock breaking disclosed in the present application are as follows: first, symmetrically open the high-pressure water jet coupling system of the edge cutterhead 2, and at the same time open the cutterhead rotation system and the cutterhead propulsion system of the edge cutterhead 2 to achieve the excavation and rock breaking of the edge cutterhead 2. When the excavation reaches the maximum stroke of the edge cutterhead propulsion cylinder 31, close the high-pressure water jet coupling system of the edge cutterhead 2, and at the same time retract the cutterhead propulsion system of the edge cutterhead 2 to ensure that all edge cutterheads 2 are located behind the blind area cutterhead 7, that is, the normal rotation of the blind area cutterhead 7 is not affected. Secondly, open the high-pressure water jet coupling system of the center cutterhead 1, and then the cutterhead rotation system and the cutterhead propulsion system of the center cutterhead 1 work simultaneously, so that the center cutterhead 1 is excavated and broken with the assistance of high-pressure water cutting. When the excavation reaches the maximum stroke of the center cutterhead propulsion cylinder 30, close the high-pressure water jet coupling system of the center cutterhead 1, and at the same time retract the cutterhead propulsion system of the center cutterhead 1. At the same time, the main propulsion cylinder 32 can push the cutter disc support frame 29 forward, so that the blind area cutter disc 7 can rotate and break the rock in the residual area after excavation of the central cutter disc 1 and all edge cutter discs 2, and finally form a complete circular excavation section.

[0033] The TBM multi-stage cutterhead for high-pressure water jet assisted rock breaking provided by the present application can significantly increase the cutting depth of the high-pressure water jet when the cutterhead speed increases, thereby improving the rock breaking efficiency of the cutterhead, and can overcome the problem that the nozzle linear velocity in the edge area of ​​the traditional single large-section cutterhead is too large and the cutting depth is too shallow, and the water jet cannot fully play the role of assisting rock breaking. At the same time, the TBM multi-stage cutterhead disclosed in the present application can independently control the high-pressure water jet coupling system, cutterhead rotation system and cutterhead propulsion system of each central cutterhead and edge cutterhead, and use the free surface created after the previous cutterhead excavation to further improve the rock breaking efficiency of adjacent sub-cutterheads.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large-section TBM multi-stage cutterhead for high-pressure water jet cutting and rock breaking, characterized in that: It includes a cutter disc system, a high-pressure water jet coupling system, a cutter disc rotation system, a cutter disc propulsion system and a cutter disc support frame (29); The cutter disc system comprises a central cutter disc (1), an edge cutter disc (2) and a blind area cutter disc (7); the edge cutter disc (2) is arranged around the central cutter disc (1); the blind area cutter disc (7) is arranged in a blind area (10) between the central cutter disc (1) and the edge cutter disc (2); and each central cutter disc (1) and edge cutter disc (2) is provided with a plurality of high-pressure water jet coupling systems.

2. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 1 is characterized in that: The central cutter disc (1) and the edge cutter disc (2) both comprise a circular cutter disc panel (3), a central cutter (4) being arranged at the central position of the cutter disc panel (3), and positive cutters (5) being arranged in sequence from the outermost side of the central cutter (4) outwards at the longest distance on the same radial line to the edge of the cutter disc.

3. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 2 is characterized in that: The central hob (4) is a double-edged hob, and the positive hob (5) is a single-edged hob.

4. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 3 is characterized in that: A plurality of scraping openings (6) are provided on the lowermost edge cutter disc (2).

5. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 4 is characterized in that: The blind area cutterhead (7) comprises a rectangular panel (8), a blind area front cutter (9) and a blind area side cutter (13); the blind area front cutter (9) is arranged on the rectangular panel (8) at a position close to the central cutterhead (1); the blind area side cutters (13) are arranged at both ends of the rectangular panel (8); and the blind area side cutters (13) are arranged to be inclined with an angle gradually decreasing from the end of the rectangular panel (8) toward the excavation contour boundary (11).

6. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 5 is characterized in that: The high-pressure water jet coupling system comprises a plurality of water jet nozzles (14) arranged on the front of the cutter head panel (3); a single-nozzle high-pressure metal pipe (15) connected to each water jet nozzle (14) is arranged on the back of the cutter head panel (3); the plurality of single-nozzle high-pressure metal pipes (15) are connected to a single-nozzle flow control valve (16); and the single-nozzle flow control valve (16) is connected in sequence to a centralized inlet metal pipe (17) and a swivel joint (18).

7. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 6 is characterized in that: The cutter disc rotation system includes a central cutter disc rotation system, an edge cutter disc rotation system and a blind area cutter disc rotation system; The central cutter disc rotation system comprises a central cutter disc flange (19), a central cutter disc main bearing (20), a central cutter disc drive motor (21) and a central cutter disc reduction box (22); the central cutter disc flange (19) is arranged on the back of the central cutter disc (1) and is connected to the central cutter disc main bearing (20); the central cutter disc main bearing (20) is connected to the central cutter disc drive motor (21); and the central cutter disc drive motor (21) is connected to the central cutter disc reduction box (22); The edge cutter disc rotation system comprises an edge cutter disc flange (23), an edge cutter disc main bearing (24), an edge cutter disc drive motor (25) and an edge cutter disc reduction box (26); the edge cutter disc flange (23) is arranged on the back of the edge cutter disc (2) and is connected to the edge cutter disc main bearing (24); the edge cutter disc main bearing (24) is connected to the edge cutter disc drive motor (25); and the edge cutter disc drive motor (25) is connected to the edge cutter disc reduction box (26); The blind area cutter disc rotation system comprises a rectangular panel support frame (27) and a fixed sleeve (28); the rectangular panel support frame (27) is arranged on the back of the rectangular panel (8) and connected to the fixed sleeve (28); and the fixed sleeve (28) is connected to the central cutter disc main bearing (20).

8. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 7 is characterized in that: The cutter disc propulsion system comprises a central cutter disc propulsion cylinder (30) connected to the central cutter disc (1), an edge cutter disc propulsion cylinder (31) connected to the edge cutter disc (2), and a support frame propulsion cylinder (32) connected to the cutter disc support frame (29).

9. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 8 is characterized in that: The central cutter disc main bearing (20), the edge cutter disc main bearing (24), the sleeve (28), the central cutter disc propulsion cylinder (30) and the edge cutter disc propulsion cylinder (31) are all connected to the cutter disc support frame (29).

10. The large-section TBM multi-stage cutterhead for high-pressure water jet slitting and rock breaking according to claim 9 is characterized in that: A shield (33) is arranged outside the cutter disc rotating system and the cutter disc propulsion system.

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