Supporting and propelling mechanism of heading machine and working method of supporting and propelling mechanism

Abstract

The invention discloses a heading machine supporting and propelling mechanism and a working method thereof. The heading machine supporting and propelling mechanism comprises a first ring beam, a second ring beam, a supporting mechanism, a sliding rail, a center cylinder mechanism, a propelling oil cylinder and a sliding connecting block. The upper end of the slide rail is fixedly connected with the lower bottom surface of the first ring beam; the lower end of the slide rail is fixedly connected with the upper bottom surface of the second ring beam; supporting mechanisms are arranged along the circumferential outer walls of the first ring beam and the second ring beam; the central cylinder mechanism is sleeved in inner rings of the first ring beam and the second ring beam; the number of the sliding connecting blocks is more than two, one end of each sliding connecting block is fixedly connected with the side wall face of the upper portion of the center cylinder mechanism, the other end of each sliding connecting block is arranged on the sliding rail in a sleeving mode, at least one sliding connecting block is fixedly connected with an outer cylinder of the thrust oil cylinder, and the piston rod end of the thrust oil cylinder is fixedly connected with the lower bottom face of the first ring beam. According to the supporting and propelling mechanism for the heading machine, double-layer supporting can be achieved through the design of the double-layer ring beam, the sliding connecting block is arranged on the center cylinder mechanism, and axial propelling of the heading machine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel and shaft excavation, and more particularly to a supporting and propulsion mechanism of a tunnel boring machine and a working method thereof. Background Art

[0002] The roadheader is the main equipment for mechanized excavation of tunnels and shafts. Its body is stably supported and uses the extended main shaft to provide powerful rotational power to drive the drill bit or cutting arm to break rocks.

[0003] The existing tunnel boring machine support is mostly single-layer, which cannot form a stable support for the strong rotational power of the main shaft, affecting the drilling effect. At the same time, there are also problems such as large size and weight of the support and propulsion mechanism, which is inconvenient to install and disassemble. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to provide a double-layer support and axially propelled tunnel boring machine support and propulsion mechanism with lightweight overall volume, small size and detachable components, and a working method thereof.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A support and propulsion mechanism for a tunnel boring machine, comprising a first ring beam, a second ring beam, a support mechanism, a slide rail, a center tube mechanism, a propulsion cylinder and a sliding connection block; the upper end of the slide rail is fixedly connected to the lower bottom surface of the first ring beam, and the lower end of the slide rail is fixedly connected to the upper bottom surface of the second ring beam; the support mechanism is arranged along the circumferential outer wall of the first ring beam and the second ring beam; the center tube mechanism is sleeved in the inner circle of the first ring beam and the second ring beam; there are more than two sliding connection blocks, one end of the sliding connection block is fixedly connected to the upper side wall surface of the center tube mechanism, and the other end of the sliding connection block is sleeved on the slide rail, at least one sliding connection block is fixedly connected to the outer tube of the propulsion cylinder, and the piston rod end of the propulsion cylinder is fixedly connected to the lower bottom surface of the first ring beam.

[0007] In the above-mentioned support and propulsion mechanism of a tunnel boring machine, the structures of the first ring beam and the second ring beam are similar, both of which are frame structures; the first ring beam and the second ring beam both include a ring beam body, a track seat and a support seat, the ring beam body is a cylindrical frame structure, and two or more track seats are evenly arranged in a circumferential direction on the upper bottom surface of the ring beam body of the second ring beam and on the lower bottom surface of the first ring beam, and the track seat on the lower bottom surface of the first ring beam and the track seat of the second ring beam are fixedly connected to the upper end and the lower end of the slide rail respectively; more than two through holes are evenly opened along the side wall surface of the ring beam body, and the support seat is fixedly installed in the through holes, and support positioning grooves are opened on the upper and lower bottom surfaces of the support seat, and the support mechanism is installed in the support seat through the support positioning grooves.

[0008] The above-mentioned tunnel boring machine support and propulsion mechanism is provided with a propulsion cylinder hole at a position corresponding to the outer tube of the propulsion cylinder on the ring beam body of the second ring beam, and the diameter of the propulsion cylinder hole is larger than the outer diameter of the outer tube of the propulsion cylinder; a piston rod mounting seat is provided on the ring beam body of the first ring beam at a position corresponding to the piston rod end of the propulsion cylinder, and the piston rod mounting seat is fixedly connected to the piston rod end of the propulsion cylinder.

[0009] The above-mentioned tunnel boring machine support and propulsion mechanism, the central tube mechanism includes a central tube body and a connecting flange; the central tube body is a hollow structure, and the connecting flange is provided at the lower end of the central tube body.

[0010] The above-mentioned tunnel boring machine support and propulsion mechanism, the sliding connection block includes a first sliding connection block and a second sliding connection block, the first sliding connection block and the second sliding connection block are two each, and the first sliding connection block and the second sliding connection block are evenly staggered along the circumferential direction of the central cylinder; one end of the first sliding connection block and the second sliding connection block are fixedly connected to the upper side wall of the central cylinder, and the other ends of the first sliding connection block and the second sliding connection block are provided with a circular hole slide, and the circular hole slide is sleeved on the outer side wall of the slide rail; propulsion cylinder mounting holes are provided on both sides of the circular hole slide of the first sliding connection block, and the outer cylinder of the propulsion cylinder is fixedly installed in the propulsion cylinder mounting hole.

[0011] The above-mentioned support and propulsion mechanism of a tunnel boring machine, the support mechanism includes an outer box, a cylinder seat, a double telescopic cylinder and a support plate, the two sides of the outer box are symmetrically fixedly connected to the cylinder seat, the cylinder seat is hinged to the cylinder end of the double telescopic cylinder through a pin shaft, the piston rod end of the double telescopic cylinder is ball-jointed to the inner wall of the support plate, and the outer wall of the support plate is provided with a small protrusion; a middle telescopic box is provided in the outer box, an outer telescopic box is provided in the middle telescopic box, and the protruding end of the outer telescopic box is ball-jointed to the inner wall of the support plate; the outer box and the cylinder seat are inserted into the support seat through the support positioning groove.

[0012] In the above-mentioned support and propulsion mechanism for a roadheader, the slide rails and the support mechanisms are each in four groups, and the included angle between the adjacent slide rails and the support mechanisms relative to the center of the first ring beam or the second ring beam is 45°.

[0013] A working method of a support and propulsion mechanism of a roadheader as described above comprises:

[0014] (A) Double-layer stable support: The support mechanism of the first ring beam and the second ring beam is pressed against the shaft wall to form a stable support for the tunnel boring machine;

[0015] (B) Axial propulsion: The propulsion cylinder drives the sliding connection block to extend and retract along the axial direction, driving the center tube mechanism to propel forward.

[0016] In the working method of the support and propulsion mechanism of the tunnel boring machine, in step (A):

[0017] During the support process, the double telescopic cylinders on the first ring beam and the second ring beam are started, and the piston rods of the double telescopic cylinders are extended to push the support plate. At the same time, the outer telescopic box and the middle telescopic box are extended out of the outer box in turn, pressing the support plate against the well wall to form a stable support for the tunnel boring machine.

[0018] In the working method of the support and propulsion mechanism of the tunnel boring machine, in step (B), axially propulsing the tunnel boring machine comprises the following steps:

[0019] Start the propulsion cylinder, and the piston rod end of the propulsion cylinder extends and retracts, pulling the first sliding connection block and the second sliding connection block to move axially, and the round hole slideways of the first sliding connection block and the second sliding connection block slide axially on the slide rail, and the first sliding connection block and the second sliding connection block drive the center tube mechanism to advance or withdraw axially.

[0020] The technical solution of the present invention achieves the following beneficial technical effects:

[0021] 1. The tunnel boring machine support and propulsion mechanism of the present invention can realize a tunnel boring machine with double-layer support and axial propulsion.

[0022] 2. Both the first ring beam and the second ring beam are cylindrical frame structures, which are light in weight and easy to install and disassemble. Four support seats are evenly arranged along the circumference of the first ring beam and the second ring beam, which is convenient for installing and disassembling the support mechanism.

[0023] 3. The structures of the first ring beam and the second ring beam are similar, and the only difference is the position of the corresponding thrust cylinder. A piston rod mounting seat is provided on the lower bottom surface of the ring beam body of the first ring beam at a position corresponding to the piston rod end of the thrust cylinder, which is used to connect with the piston rod end of the thrust cylinder. A thrust cylinder hole is provided on the lower bottom surface of the ring beam body of the second ring beam at a position corresponding to the outer cylinder of the thrust cylinder, and the diameter of the thrust cylinder hole is larger than the outer diameter of the outer cylinder of the thrust cylinder, so as to accommodate the outer cylinder part of the thrust cylinder when the thrust center cylinder mechanism moves.

[0024] 4. In the support mechanism, the cylinder seat and the double telescopic cylinder are arranged on both sides of the outer box respectively, so as to form a stable support for the support mechanism from both sides, which can resist the torque and pressure from the drill bit and the center tube mechanism, and make the tunnel boring machine run stably as a whole; at the same time, the cylinder seat and the double telescopic cylinder are connected by a pin shaft, and the outer telescopic box and the support plate are connected by a ball joint, which can facilitate the rotation of the support plate and realize stable support for the inclined well wall or the well wall with rough surface.

[0025] 5. A first sliding connection block and a second sliding connection block are respectively arranged and staggered evenly along the circumferential direction of the central cylinder, that is, the two first sliding connection blocks and the two second sliding connection blocks are arranged vertically and crosswise, and the first sliding connection block is arranged by setting a stacked propulsion cylinder mounting hole, so that the outer cylinder of the propulsion cylinder is fixedly installed in the propulsion cylinder mounting hole, thereby improving the stability and symmetry of the fixed cylinder installation; the extension and retraction of the propulsion cylinder realizes the sliding of the circular hole slide on the slide rail, thereby realizing the advancement and withdrawal of the central cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the support and propulsion mechanism of the tunnel boring machine of the present invention;

[0027] Figure 2 Another three-dimensional structural schematic diagram of the support and propulsion mechanism of the tunnel boring machine of the present invention;

[0028] Figure 3 The mechanism intention of the second ring beam of the support and propulsion mechanism of the roadheader of the present invention;

[0029] Figure 4 A schematic cross-sectional structure diagram of the second ring beam of the support and propulsion mechanism of the tunnel boring machine of the present invention;

[0030] Figure 5 A schematic structural diagram of a central cylinder and a sliding connection block of a support and propulsion mechanism of a roadheader according to the present invention;

[0031] Figure 6 A schematic structural diagram of a support mechanism of a support and propulsion mechanism of a roadheader according to the present invention;

[0032] Figure 7 A schematic cross-sectional structure diagram of a support mechanism of a support and propulsion mechanism of a roadheader according to the present invention.

[0033] The reference numerals in the figure are as follows: 1-first ring beam; 2-support mechanism; 3-slide rail; 4-center tube mechanism; 5-propulsion cylinder; 6-second ring beam; 7-sliding connection block;

[0034] 201-outer box; 202-cylinder seat; 203-pin shaft; 204-double telescopic cylinder; 205-middle telescopic box; 206-outer telescopic box; 207-support plate; 401-center cylinder; 402-connecting flange;

[0035] 601-ring beam body; 602-track seat; 603-support seat; 604-support positioning groove; 605-thrust cylinder hole; 701-first sliding connection block; 702-second sliding connection block; 703-round hole slideway; 704-thrust cylinder mounting hole. DETAILED DESCRIPTION

[0036] The tunnel boring machine support and propulsion mechanism of the present application includes a first ring beam 1, a second ring beam 6, a support mechanism 2, a slide rail 3, a center tube mechanism 4, a propulsion cylinder 5 and a sliding connection block 7; the upper end of the slide rail 3 is fixedly connected to the lower bottom surface of the first ring beam 1, and the lower end of the slide rail 3 is fixedly connected to the upper bottom surface of the second ring beam 6; the support mechanism 2 is arranged along the circumferential outer wall of the first ring beam 1 and the second ring beam 6; the center tube mechanism 4 is sleeved in the inner circle of the first ring beam 1 and the second ring beam 6; there are more than two sliding connection blocks 7, one end of the sliding connection block 7 is fixedly connected to the upper side wall surface of the center tube mechanism 4, and the other end of the sliding connection block 7 is sleeved on the slide rail 3, at least one sliding connection block 7 is fixedly connected to the outer tube of the propulsion cylinder 5, and the piston rod end of the propulsion cylinder 5 is fixedly connected to the lower bottom surface of the first ring beam 1.

[0037] In this embodiment, the support mechanism 2 and the slide rail 3 are both 4 groups, and the support mechanism 2 is along the circumferential outer wall of the first ring beam 1 and the second ring beam 6, and the adjacent slide rail 3 and the support mechanism 2 have an angle of 45° relative to the center of the first ring beam 1 or the second ring beam 6.

[0038] The structures of the first ring beam 1 and the second ring beam 6 are similar, both of which are frame structures; the first ring beam 1 and the second ring beam 6 both include a ring beam body 601, a track seat 602 and a support seat 603, the ring beam body 601 is a cylindrical frame structure, four track seats 602 are evenly arranged in a circumferential direction on the upper bottom surface of the ring beam body 601 of the second ring beam 6 and on the lower bottom surface of the first ring beam 1, the track seat 602 on the lower bottom surface of the first ring beam 1 and the track seat 602 of the second ring beam 6 are fixedly connected to the upper and lower ends of the slide rail 3 respectively; four through holes are evenly opened along the side wall surface of the ring beam body 601, the support seat 603 is fixedly installed in the through holes, support positioning grooves 604 are opened on the upper and lower bottom surfaces of the support seat 603, and the support mechanism 2 is installed in the support seat 603 through the support positioning grooves 604.

[0039] The first ring beam and the second ring beam have similar structures, and differ only in the positions corresponding to the propulsion cylinders. A propulsion cylinder hole 605 is provided on the ring beam body 601 of the second ring beam 6 at the position corresponding to the outer cylinder of the propulsion cylinder 5, and the diameter of the propulsion cylinder hole 605 is larger than the outer diameter of the outer cylinder of the propulsion cylinder 5, and is used to accommodate the outer cylinder portion of the propulsion cylinder when the propulsion center cylinder mechanism moves. A piston rod mounting seat is provided on the ring beam body 601 of the first ring beam at the position corresponding to the piston rod end of the propulsion cylinder 5, and the piston rod mounting seat is fixedly connected to the piston rod end of the propulsion cylinder 5, and the piston rod mounting seat is used to connect to the piston rod end of the propulsion cylinder.

[0040] The central cylinder mechanism 4 includes a central cylinder body 402 and a connecting flange 401; the central cylinder body 402 is a hollow structure, and the lower end of the central cylinder body 402 is provided with the connecting flange 401. The connecting flange 401 at the lower end of the central cylinder body facilitates the connection of the support and propulsion mechanism of the present application with the tunneling machine.

[0041] The sliding connection block 7 includes a first sliding connection block 701 and a second sliding connection block 702, and there are two of each of the first sliding connection block 701 and the second sliding connection block 702, and the first sliding connection block 701 and the second sliding connection block 702 are evenly staggered along the circumferential direction of the central cylinder 402; one end of the first sliding connection block 701 and the second sliding connection block 702 are fixedly connected to the upper side wall surface of the central cylinder 402. The vertically staggered first sliding connection block 701 and the second sliding connection block 702 can realize the stable advancement and withdrawal of the central cylinder mechanism driven by the propulsion cylinder.

[0042] The other ends of the first sliding connection block 701 and the second sliding connection block 702 are each provided with a round hole slide 703, and the round hole slide 703 is sleeved on the outer wall of the slide rail 3; the round hole slide 703 of the first sliding connection block 701 is provided with thrust cylinder mounting holes 704 on both sides, and the outer tube of the thrust cylinder 5 is fixedly installed in the thrust cylinder mounting hole 704.

[0043] The first sliding connection block 701 and the second sliding connection block 702 which are sleeved outside the slide rail 3 have slightly different structures. In addition to the round hole slide 703, the first sliding connection block is also provided with thrust cylinder mounting holes 704 on both sides of the round hole slide 703, which are used to install the outer tube of the thrust cylinder 5 in the thrust cylinder mounting hole, thereby improving the stability and symmetry of the fixed cylinder installation.

[0044] The support mechanism 2 includes an outer box 201, a cylinder seat 202, a double telescopic cylinder 204 and a support plate 207. The two sides of the outer box 201 are symmetrically fixedly connected to the cylinder seat 202. The cylinder seat 202 is hinged to the cylinder end of the double telescopic cylinder 204 through a pin 203. The piston rod end of the double telescopic cylinder 204 is ball-jointed to the inner wall of the support plate 207. The outer wall of the support plate 207 is provided with a small protrusion; a middle telescopic box 205 is provided in the outer box 201, and an outer telescopic box 206 is provided in the middle telescopic box 205. The protruding end of the outer telescopic box 206 is ball-jointed to the inner wall of the support plate 207; the outer box 201 and the cylinder seat 202 are inserted into the support seat 603 through the support positioning groove 604. The cylinder seat and the double telescopic cylinder are arranged on both sides of the outer box respectively, so as to form stable support for the supporting mechanism from both sides, resist the torque and pressure from the drill bit and the center tube mechanism, and make the tunnel boring machine run stably as a whole; at the same time, the cylinder seat and the double telescopic cylinder are connected by a pin shaft, and the outer telescopic box and the support plate are connected by a ball joint, which can facilitate the rotation of the support plate and realize stable support for the inclined well wall or the well wall with rough surface.

[0045] The tunnel boring machine support and propulsion mechanism of the present application can realize double-layer stable support and axial propulsion of the tunnel boring machine. The specific working method is as follows:

[0046] A. Double-layer stable support: The support mechanism 2 of the first ring beam 1 and the second ring beam 6 is pressed against the shaft wall to form a stable support for the tunnel boring machine;

[0047] During the support process, the double telescopic cylinders 204 on the first ring beam 1 and the second ring beam 6 are started, and the piston rods of the double telescopic cylinders 204 are extended to push the support plate 207. At the same time, the outer telescopic box 206 and the middle telescopic box 205 are extended out of the outer box 201 in turn, pressing the support plate 207 against the well wall to form a stable support for the tunnel boring machine.

[0048] B. Axial propulsion: The propulsion cylinder 5 drives the sliding connection block 7 to extend and retract along the axial direction, driving the central tube mechanism 4 to propel forward.

[0049] Start the thrust cylinder 5, and the piston rod end of the thrust cylinder 5 extends and retracts, pulling the first sliding connection block 701 and the second sliding connection block 702 to move axially, and the circular hole slideways 703 of the first sliding connection block 701 and the second sliding connection block 702 slide axially on the slide rail 3, and the first sliding connection block 701 and the second sliding connection block 702 drive the central tube mechanism 4 to advance or withdraw axially.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A support and propulsion mechanism for a roadheader, characterized in that: The invention comprises a first ring beam (1), a second ring beam (6), a support mechanism (2), a slide rail (3), a central tube mechanism (4), a propulsion cylinder (5) and a sliding connection block (7); the upper end of the slide rail (3) is fixedly connected to the lower bottom surface of the first ring beam (1), and the lower end of the slide rail (3) is fixedly connected to the upper bottom surface of the second ring beam (6); the support mechanism (2) is arranged along the circumferential outer wall of the first ring beam (1) and the second ring beam (6); the central tube mechanism (4) is sleeved In the inner ring of the first ring beam (1) and the second ring beam (6); there are more than two sliding connection blocks (7), one end of the sliding connection block (7) is fixedly connected to the upper side wall surface of the central tube mechanism (4), and the other end of the sliding connection block (7) is sleeved on the slide rail (3), at least one sliding connection block (7) is fixedly connected to the outer tube of the propulsion cylinder (5), and the piston rod end of the propulsion cylinder (5) is fixedly connected to the lower bottom surface of the first ring beam (1).

2. A tunnel boring machine support and propulsion mechanism according to claim 1, characterized in that: The structures of the first ring beam (1) and the second ring beam (6) are similar, both of which are frame structures; the first ring beam (1) and the second ring beam (6) both comprise a ring beam body (601), a track seat (602) and a support seat (603); the ring beam body (601) is a cylindrical frame structure; two or more track seats (602) are evenly arranged along the circumferential direction on the upper bottom surface of the ring beam body (601) of the second ring beam (6) and on the lower bottom surface of the first ring beam (1); the first ring beam ( 1) and the track seat (602) of the second ring beam (6) are respectively fixedly connected to the upper end and the lower end of the slide rail (3); more than two through holes are evenly arranged along the side wall surface of the ring beam body (601), and the support seat (603) is fixedly installed in the through holes; support positioning grooves (604) are arranged on the upper and lower bottom surfaces of the support seat (603), and the support mechanism (2) is installed in the support seat (603) through the support positioning grooves (604).

3. A tunnel boring machine support and propulsion mechanism according to claim 3, characterized in that: A propulsion cylinder hole (605) is provided on the ring beam body (601) of the second ring beam (6) at a position corresponding to the outer tube of the propulsion cylinder (5), and the diameter of the propulsion cylinder hole (605) is larger than the outer diameter of the outer tube of the propulsion cylinder (5); a piston rod mounting seat is provided on the ring beam body (601) of the first ring beam at a position corresponding to the piston rod end of the propulsion cylinder (5), and the piston rod mounting seat is fixedly connected to the piston rod end of the propulsion cylinder (5).

4. A tunnel boring machine support and propulsion mechanism according to claim 1, characterized in that: The central cylinder mechanism (4) comprises a central cylinder body (402) and a connecting flange (401); the central cylinder body (402) is a hollow structure, and the connecting flange (401) is provided at the lower end of the central cylinder body (402).

5. A tunnel boring machine support and propulsion mechanism according to claim 4, characterized in that: The sliding connection block (7) comprises a first sliding connection block (701) and a second sliding connection block (702), wherein the first sliding connection block (701) and the second sliding connection block (702) are two in number, and the first sliding connection block (701) and the second sliding connection block (702) are evenly and alternately arranged along the circumferential direction of the central cylinder (402); one end of the first sliding connection block (701) and the second sliding connection block (702) are fixedly connected to the upper side wall of the central cylinder (402), and the other end of the first sliding connection block (701) and the second sliding connection block (702) are provided with a circular hole slideway (703), and the circular hole slideway (703) is sleeved on the outer side wall of the slide rail (3); thrust cylinder mounting holes (704) are provided on both sides of the circular hole slideway (703) of the first sliding connection block (701), and the outer cylinder of the thrust cylinder (5) is fixedly installed in the thrust cylinder mounting hole (704).

6. A tunnel boring machine support and propulsion mechanism according to claim 2, characterized in that: The support mechanism (2) comprises an outer box (201), a cylinder seat (202), a double telescopic oil cylinder (204) and a support plate (207); the two sides of the outer box (201) are symmetrically fixedly connected to the cylinder seat (202); the cylinder seat (202) is hinged to the cylinder barrel end of the double telescopic oil cylinder (204) through a pin shaft (203); the piston rod end of the double telescopic oil cylinder (204) is spherically connected to the inner wall of the support plate (207); The outer wall of the support plate (207) is provided with a small protrusion; a middle telescopic box (205) is provided inside the outer box (201), an outer telescopic box (206) is provided inside the middle telescopic box (205), and the extended end of the outer telescopic box (206) is connected to the inner wall of the support plate (207) by a ball hinge; the outer box (201) and the oil cylinder seat (202) are inserted into the support seat (603) through the support positioning groove (604).

7. A tunnel boring machine support and propulsion mechanism according to claim 1, characterized in that: The slide rails (3) and the support mechanisms (2) are each in four groups, and the angle between adjacent slide rails (3) and the support mechanisms (2) relative to the center of the first ring beam (1) or the second ring beam (6) is 45°.

8. A working method of a support and propulsion mechanism for a roadheader according to any one of claims 1 to 7, characterized in that: include: (A) Double-layer stable support: the support mechanism (2) of the first ring beam (1) and the second ring beam (6) is pressed against the shaft wall to form a stable support for the tunnel boring machine; (B) Axial propulsion: The propulsion cylinder (5) drives the sliding connection block (7) to extend and retract along the axial direction, thereby driving the central tube mechanism (4) to propel forward.

9. A working method of a support and propulsion mechanism for a roadheader according to claim 8, characterized in that: In step (A): During the support process, the double telescopic cylinders (204) on the first ring beam (1) and the second ring beam (6) are started, and the piston rods of the double telescopic cylinders (204) are extended to push the support plate (207). At the same time, the outer telescopic box (206) and the middle telescopic box (205) are extended out of the outer box (201) in sequence, pressing the support plate (207) against the well wall, thereby forming a stable support for the tunnel boring machine.

10. A working method of a support and propulsion mechanism of a roadheader according to claim 8, characterized in that: In step (B), the axial advancement of the tunnel boring machine comprises the following steps: The propulsion cylinder (5) is started, and the piston rod end of the propulsion cylinder (5) extends and retracts, pulling the first sliding connection block (701) and the second sliding connection block (702) to move axially, and the circular hole slideways (703) of the first sliding connection block (701) and the second sliding connection block (702) slide axially on the slide rail (3), and the first sliding connection block (701) and the second sliding connection block (702) drive the central tube mechanism (4) to advance or retract axially.

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