An integrated equipment and method for tunnel widening.

Abstract

This invention relates to the field of tunnel construction technology, specifically to an integrated device and method for tunnel widening. The device includes a cutting assembly and a rock-breaking assembly integrated onto a vehicle body. In the cutting assembly, a first sliding base is movably mounted on the vehicle body; one end of a length adjustment assembly is hinged to the first sliding base, while the other end is connected to a sawing mechanism; one end of a pitch angle adjustment assembly is hinged to the first sliding base, while the other end is hinged to the length adjustment assembly; in the rock-breaking assembly, a second sliding base is movably mounted on the vehicle body; and a rock-breaking hammer is connected to the second sliding base via a swing assembly. The method involves using this device to complete tunnel widening. This invention enables widening of localized areas of a tunnel cross-section and is suitable for widening small-diameter tunnel cross-sections. When widening small-end faces of a tunnel, no auxiliary equipment is required, greatly simplifying the widening process and improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to an integrated equipment and method for tunnel widening. Background Technology

[0002] Currently, the main method for widening existing tunnels is blasting, which consumes a significant amount of manpower and resources and causes considerable disturbance to the overall rock structure, affecting its stability. Furthermore, existing tunnel widening equipment is primarily designed for widening the entire tunnel cross-section, making it difficult to widen localized areas. The equipment is also complex in structure and large in size, unsuitable for widening small-diameter tunnels. Some equipment used for widening small tunnel faces requires auxiliary equipment, resulting in numerous steps in the widening operation, hindering continuous mechanized construction and leading to low efficiency.

[0003] In summary, there is a need to develop an integrated equipment and method for tunnel widening to address the problems of existing tunnel widening equipment, such as difficulty in widening local areas of the cross-section, unsuitability for widening small-diameter tunnel cross-sections, and the need for auxiliary equipment during widening of small tunnel faces. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated device and method for tunnel widening, the specific technical solution of which is as follows:

[0005] In a first aspect, the present invention provides an integrated tunnel widening device, comprising a vehicle body, a cutting assembly, and a rock-breaking assembly; a first pair of wheels is provided at the bottom of the vehicle body; the cutting assembly and the rock-breaking assembly are both movably disposed on the vehicle body along the length direction of the vehicle body;

[0006] The cutting assembly includes a first sliding base, a length adjustment assembly, a pitch angle adjustment assembly, and a sawing mechanism; the first sliding base is movably mounted on the vehicle body; one end of the length adjustment assembly is hinged to the first sliding base, and the other end is connected to the sawing mechanism; one end of the pitch angle adjustment assembly is hinged to the first sliding base, and the other end is hinged to the length adjustment assembly.

[0007] The rock-breaking assembly includes a second sliding base, a swing assembly, and a breaker hammer; the second sliding base is movably mounted on the vehicle body; the breaker hammer is connected to the second sliding base via the swing assembly.

[0008] Optionally, the rock-breaking component further includes a rotating shaft and a mounting support; a mounting groove for mounting the rotating shaft is provided on the second sliding base; both ends of the rotating shaft are rotatably connected to the inner wall of the mounting groove; one end of the mounting support is located inside the mounting groove and connected to the rotating shaft, while its other end is located outside the mounting groove and connected to the swing component.

[0009] Optionally, the swing assembly includes a second telescopic arm, a second lateral swing cylinder, a swing cylinder, and a lifting cylinder; one end of the second telescopic arm is hinged to the mounting support, and the other end is hinged to the breaker hammer; one end of the second lateral swing cylinder is a fixed end connected to the second sliding base, and the other end is a working end hinged to the second telescopic arm; one end of the swing cylinder is a fixed end hinged to the second telescopic arm, and the other end is a working end hinged to the breaker hammer; one end of the lifting cylinder is a fixed end hinged to the mounting support, and the other end is a telescopic end hinged to the second telescopic arm.

[0010] Optionally, the length adjustment assembly includes a first telescopic arm; one end of the first telescopic arm is hinged to the first sliding base, and the other end is connected to the sawing mechanism;

[0011] The cutting assembly further includes a first lateral swing cylinder; one end of the first lateral swing cylinder is a fixed end and is hinged to the first sliding base, while the other end is a working end and is hinged to the first telescopic arm.

[0012] Optionally, the pitch angle adjustment assembly includes a side support cylinder, one end of which is hinged to the first sliding base, and the other end is hinged to the first telescopic arm.

[0013] Optionally, the integrated tunnel widening equipment further includes a guide rail assembly and a drive assembly; the guide rail assembly includes a first guide rail and a second guide rail; both the first guide rail and the second guide rail are symmetrically arranged along the length direction of the vehicle body, and their ends near the front of the vehicle body are both located on the vehicle body, while their ends away from the front of the vehicle body extend beyond the rear of the vehicle body; the cutting assembly and the rock-breaking assembly are both provided on the first guide rail and the second guide rail; the drive assembly is located on the vehicle body and includes a first drive member and a second drive member; the working end of the first drive member is connected to the first sliding base; the working end of the second drive member is connected to the second sliding base.

[0014] Optionally, the integrated tunnel widening equipment further includes a telescopic support assembly; the telescopic support assembly includes a first telescopic support unit and a second telescopic support unit; the first telescopic support unit is disposed below the first guide rail located outside the rear of the vehicle, one end of which is a fixed end and connected to the first guide rail, while the other end is a telescopic end and extends and retracts towards the ground; the second telescopic support unit is disposed below the second guide rail located outside the rear of the vehicle, one end of which is a fixed end and connected to the second guide rail, while the other end is a telescopic end and extends and retracts towards the ground.

[0015] Optionally, the integrated tunnel widening equipment further includes a telescopic support shoe assembly; the telescopic support shoe assembly includes a first telescopic support shoe piece and a second telescopic support shoe piece; the first telescopic support shoe piece and the second telescopic support shoe piece are symmetrically arranged on both sides of the vehicle body.

[0016] Optionally, the first traveling wheel pair is a driving wheel pair; it also includes a second traveling wheel pair; the second traveling wheel pair is a driven wheel pair and is disposed at the bottom of the guide rail assembly located outside the rear of the vehicle.

[0017] Optionally, the integrated tunnel widening equipment also includes a main controller mounted on the vehicle body; the main controller is connected to the cutting assembly, the rock breaking assembly, the drive assembly, the telescopic support assembly, and the telescopic support shoe assembly.

[0018] In a second aspect, the present invention provides a tunnel widening method using the integrated equipment described above, comprising:

[0019] Step S1: Drive the vehicle to the predetermined position; the main controller opens the telescopic support shoe assembly to tighten the tunnel walls on both sides; the main controller opens the telescopic support assembly to tighten the ground.

[0020] Step S2: The main controller starts the cutting assembly to cut the tunnel cross-section; the main controller starts the first driving component to drive the first sliding base to drive the cutting assembly to cut the tunnel cross-section back and forth along the guide rail assembly to form a slit; after the cutting operation is completed, the main controller controls the cutting assembly to return to the initial position;

[0021] Step S3: The main controller starts the rock-breaking assembly to expand the cross-section along the cut; the main controller starts the second drive component to drive the second sliding base to link the rock-breaking assembly to expand the cross-section back and forth along the guide rail assembly; after the cross-section expansion operation is completed, the main controller controls the rock-breaking assembly to return to the initial position.

[0022] Step S4: The main controller retracts the telescopic support shoe assembly and the telescopic support assembly;

[0023] Step S5: Repeat steps S1-S4 until the excavation of the entire tunnel cross section is completed.

[0024] The application of the technical solution of the present invention has at least the following beneficial effects:

[0025] This invention provides an integrated equipment and method for tunnel widening, which integrates cutting and rock-breaking components on the vehicle body. This design offers advantages such as compact structure and small space occupation, enabling widening of localized sections of the tunnel face, and is suitable for widening small-diameter tunnel faces. When widening small tunnel faces, no auxiliary equipment is required, greatly simplifying the widening process and improving efficiency. Furthermore, the pre-cutting followed by crushing method minimizes disturbance to the overall surrounding rock structure and has minimal impact on the stability of the overall tunnel structure. Automated operation via a main controller significantly improves widening efficiency and reduces manual labor intensity. Moreover, by combining the cutting and rock-breaking components with guide rail and drive components, the amount of work that can be done at a single predetermined position is greatly increased, further enhancing widening efficiency. During widening operations, the telescopic support shoe assembly and the telescopic support assembly improve the stability of the widening operation.

[0026] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of the main structure of an integrated tunnel widening device according to an embodiment of the present invention;

[0029] Figure 2 This is a top view of an integrated tunnel widening device according to an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the cutting component in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the rock-breaking component in an embodiment of the present invention;

[0032] The components include: 1. Vehicle body; 1.1. First travel wheel pair; 1.2. Second travel wheel pair; 2. Cutting assembly; 2.1. First sliding base; 2.2. Length adjustment assembly; 2.3. Pitch angle adjustment assembly; 2.4. Sawing mechanism; 2.5. First lateral swing cylinder; 3. Rock breaking assembly; 3.1. Second sliding base; 3.2. Breaker hammer; 3.3. Rotary shaft; 3.4. Mounting support; 3.5. Second telescopic arm; 3.6. Second lateral swing cylinder; 3.7. Swing cylinder; 3.8. Lifting cylinder; 4. Guide rail assembly; 5. Drive assembly; 6. Lifting and retracting support assembly; 7. Telescopic support shoe assembly. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0034] Example:

[0035] See Figures 1-4 An integrated tunnel excavation device includes a vehicle body 1, a cutting assembly 2, and a rock-breaking assembly 3; a first track wheel pair 1.1 (or track) is provided at the bottom of the vehicle body 1; the cutting assembly 2 and the rock-breaking assembly 3 are both movably mounted on the vehicle body 1 along the length direction of the vehicle body 1.

[0036] The cutting assembly 2 includes a first sliding base 2.1, a length adjustment assembly 2.2, a pitch angle adjustment assembly 2.3, and a sawing mechanism 2.4. The first sliding base 2.1 is movably mounted on the vehicle body 1. One end of the length adjustment assembly 2.2 is hinged to the first sliding base 2.1, and the other end is connected to the sawing mechanism 2.4. One end of the pitch angle adjustment assembly 2.3 is hinged to the first sliding base 2.1, and the other end is hinged to the length adjustment assembly 2.2, which facilitates the adjustment of the pitch angle of the sawing mechanism 2.4 during the cutting operation.

[0037] The rock-breaking component 3 includes a second sliding base 3.1, a swing component, and a breaking hammer 3.2; the second sliding base 3.1 is movably mounted on the vehicle body 1; the breaking hammer 3.2 is connected to the second sliding base 3.1 through the swing component.

[0038] See Figure 4The rock-breaking component 3 further includes a rotating shaft 3.3 and a mounting support 3.4; a mounting groove for mounting the rotating shaft 3.3 is provided on the second sliding base 3.1; both ends of the rotating shaft 3.3 are rotatably connected to the inner wall of the mounting groove; one end of the mounting support 3.4 is located inside the mounting groove and connected to the rotating shaft 3.3, while its other end is located outside the mounting groove and connected to the swing component.

[0039] See Figure 4 The swing assembly includes a second telescopic arm 3.5, a second horizontal swing cylinder 3.6, a swing cylinder 3.7, and a lifting cylinder 3.8. One end of the second telescopic arm 3.5 is hinged to the mounting support 3.4, and the other end is hinged to the breaker hammer 3.2, facilitating adjustment of the breaker hammer 3.2's crushing distance. One end of the second horizontal swing cylinder 3.6 is a fixed end connected to the second sliding base 3.1, and the other end is a working end hinged to the second telescopic arm 3.5. The second telescopic arm 3.5, in conjunction with the breaker hammer 3.2, allows adjustment of the forward and backward swing angle of the breaker hammer 3.2 along the length of the vehicle body 1. The swing cylinder 3.7... One end of cylinder 7 is a fixed end and hinged to the second telescopic arm 3.5, while the other end is a working end and hinged to the crusher hammer 3.2, used for small-range adjustment of the pitch angle of the crusher hammer 3.2; one end of lifting cylinder 3.8 is a fixed end and hinged to the mounting support 3.4, while the other end is a telescopic end and hinged to the second telescopic arm 3.5, enabling large-range adjustment of the pitch angle of the crusher hammer 3.2 through linkage with the second telescopic arm 3.5; the combined use of swing cylinder 3.7 and lifting cylinder 3.8 facilitates both small-range and large-range adjustment of the pitch angle of the crusher hammer 3.2, thereby improving crushing efficiency.

[0040] See Figure 3 The length adjustment component 2.2 includes a first telescopic arm; one end of the first telescopic arm is hinged to the first sliding base 2.1, and the other end is connected to the sawing mechanism 2.4. The first telescopic arm facilitates the adjustment of the cutting distance of the sawing mechanism 2.4.

[0041] See Figure 3 The cutting assembly 2 further includes a first swing cylinder 2.5; one end of the first swing cylinder 2.5 is a fixed end and is hinged to the first sliding base 2.1, while the other end is a working end and is hinged to the first telescopic arm. The sawing mechanism 2.4 is linked by the first telescopic arm to realize the adjustment of the back-and-forth swing angle of the sawing mechanism 2.4 along the length direction of the vehicle body 1.

[0042] The pitch angle adjustment component 2.3 includes a side support cylinder, one end of which is hinged to the first sliding base 2.1, and the other end is hinged to the first telescopic arm.

[0043] See Figures 1-2 The integrated tunnel widening equipment also includes a guide rail assembly 4 and a drive assembly 5. The guide rail assembly 4 includes a first guide rail and a second guide rail. The first guide rail and the second guide rail are symmetrically arranged along the length direction of the vehicle body 1, and the ends of both near the front of the vehicle are located on the vehicle body 1, while the ends away from the front of the vehicle extend outward from the rear of the vehicle. The cutting assembly 2 and the rock-breaking assembly 3 are both arranged on the first guide rail and the second guide rail. The drive assembly 5 is located on the vehicle body 1 and includes a first drive component (specifically a motor) and a second drive component (specifically a motor). The working end of the first drive component is connected to the first sliding base 2.1; the working end of the second drive component is connected to the second sliding base 3.1.

[0044] The integrated tunnel widening equipment also includes a telescopic support assembly 6; the telescopic support assembly 6 includes a first telescopic support unit and a second telescopic support unit; the first telescopic support unit (specifically two, spaced apart) is located below the first guide rail outside the rear of the vehicle, one end of which is a fixed end connected to the first guide rail, and the other end is a telescopic end that extends and retracts towards the ground; the second telescopic support unit (specifically two, spaced apart) is located below the second guide rail outside the rear of the vehicle, one end of which is a fixed end connected to the second guide rail, and the other end is a telescopic end that extends and retracts towards the ground.

[0045] The integrated tunnel widening equipment also includes a telescopic support shoe assembly 7; the telescopic support shoe assembly 7 includes a first telescopic support shoe unit and a second telescopic support shoe unit; the first telescopic support shoe unit and the second telescopic support shoe unit are symmetrically arranged on both sides of the vehicle body 1. A first telescopic support shoe cylinder is provided on the first telescopic support shoe unit. A second telescopic support shoe cylinder is provided on the second telescopic support shoe unit.

[0046] The first traveling wheel pair 1.1 (specifically two sets of traveling wheels) is the active wheel pair, used to provide the active force for the vehicle body 1 to move; it also includes a second traveling wheel pair 1.2 (specifically one set of traveling wheels); the second traveling wheel pair 1.2 is the driven wheel pair, and is set at the bottom of the guide rail assembly 4 located outside the rear of the vehicle, so as to provide support for the guide rail assembly 4 and ensure the central stability during the operation of the entire vehicle;

[0047] The integrated tunnel widening equipment also includes a main controller (specifically a PLC controller) mounted on the vehicle body 1; the main controller is connected to the cutting component 2, the rock breaking component 3, the drive component 5, the telescopic support component 6, and the telescopic support shoe component 7.

[0048] A tunnel widening method using the integrated equipment described above, comprising:

[0049] Step S1: Drive the vehicle body 1 to the predetermined position; see [link / reference] Figure 2 The main controller opens the telescopic support shoe assembly 7 to tighten the tunnel walls on both sides; the main controller opens the telescopic support assembly 6 to tighten the ground.

[0050] Step S2: The main controller starts the cutting assembly 2 to cut the tunnel cross section; the main controller starts the first driving component to drive the first sliding base 2.1 to link the cutting assembly 2 to cut the tunnel cross section back and forth along the guide rail assembly 4 to form a slit; after the cutting operation is completed, the main controller controls the cutting assembly 2 to return to the initial position;

[0051] Step S3: The main controller starts the rock-breaking component 3 to expand the cross-section along the cut; the main controller starts the second drive component to drive the second sliding base 3.1 to link the rock-breaking component 3 to expand the cross-section back and forth along the guide rail component 4; after the cross-section expansion operation is completed, the main controller controls the rock-breaking component 3 to return to the initial position.

[0052] Step S4: The main controller retracts the telescopic support shoe assembly 7 and the telescopic support assembly 6;

[0053] Step S5: Repeat steps S1-S4 until the excavation of the entire tunnel cross section is completed.

[0054] This embodiment employs a pre-cutting and post-breaking excavation method, which minimizes disturbance to the overall surrounding rock structure and has minimal impact on the stability of the overall tunnel structure. Automated operation is achieved through the main controller, significantly improving excavation efficiency and reducing manual labor intensity. Furthermore, by combining the cutting component 2 and the rock-breaking component 3 with the guide rail component 4 and the drive component 5, the workload of stopping the vehicle 1 at a single predetermined position is greatly increased, thereby improving excavation efficiency. During excavation operations, the use of the telescopic support shoe component 7 and the telescopic support component 6 enhances the stability of the excavation operation.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated apparatus for tunnel enlargement, characterized in that, The utility model relates to a cutting and breaking rock vehicle, including vehicle body (1), cutting assembly (2) and rock breaking assembly (3), first row wheel pair (1.1) is set up in the bottom of vehicle body (1), cutting assembly (2) and rock breaking assembly (3) are all along the length direction of vehicle body (1) movable setting on vehicle body (1), Cutting assembly (2) includes first sliding base (2.1), length adjusting assembly (2.2), pitch angle adjusting assembly (2.3) and sawing mechanism (2.4), first sliding base (2.1) is movably arranged on vehicle body (1), one end of length adjusting assembly (2.2) is hinged on first sliding base (2.1), and the other end is connected with sawing mechanism (2.4), one end of pitch angle adjusting assembly (2.3) is hinged on first sliding base (2.1), and the other end is hinged with length adjusting assembly (2.2), Rock breaking assembly (3) includes second sliding base (3.1), swing assembly and breaking hammer head (3.2), second sliding base (3.1) is movably arranged on vehicle body (1), breaking hammer head (3.2) is connected with second sliding base (3.1) through swing assembly, It also includes guide rail assembly (4) and driving assembly (5), guide rail assembly (4) includes first guide rail and second guide rail, first guide rail and second guide rail are symmetrically arranged along the length direction of vehicle body (1), and the end close to the vehicle head of both is arranged on vehicle body (1), and the end away from the vehicle head of both extends outside the vehicle tail, cutting assembly (2) and rock breaking assembly (3) are arranged on first guide rail and second guide rail, driving assembly (5) is arranged on vehicle body (1), and it includes first driving part and second driving part, the working end of first driving part is connected with first sliding base (2.1), and the working end of second driving part is connected with second sliding base (3.1).

2. The integrated tunneling and excavation apparatus of claim 1, wherein, Rock breaking assembly (3) further includes pivot shaft (3.3) and mounting support (3.4), mounting groove for mounting pivot shaft (3.3) is arranged on second sliding base (3.1), both ends of pivot shaft (3.3) are rotatably connected with the inner wall of mounting groove, one end of mounting support (3.4) is located in mounting groove and connected with pivot shaft (3.3), and the other end is located outside mounting groove and connected with swing assembly.

3. The integrated tunneling and excavation apparatus of claim 2, wherein, The swing assembly comprises a second telescopic arm (3.5), a second swing oil cylinder (3.6), a swing oil cylinder (3.7) and a lifting oil cylinder (3.8); one end of the second telescopic arm (3.5) is hinged to the mounting support (3.4), and the other end is hinged to the breaking hammer head (3.2); one end of the second swing oil cylinder (3.6) is a fixed end and is connected to the second sliding base (3.1), and the other end is an operation end and is hinged to the second telescopic arm (3.5); one end of the swing oil cylinder (3.7) is a fixed end and is hinged to the second telescopic arm (3.5), and the other end is an operation end and is hinged to the breaking hammer head (3.2); one end of the lifting oil cylinder (3.8) is a fixed end and is hinged to the mounting support (3.4), and the other end is a telescopic end and is hinged to the second telescopic arm (3.5).

4. The integrated tunneling device of claim 1, wherein, The length adjusting assembly (2.2) comprises a first telescopic arm; one end of the first telescopic arm is hinged to the first sliding base (2.1), and the other end is connected to the sawing mechanism (2.4); The cutting assembly (2) further comprises a first swing oil cylinder (2.5); one end of the first swing oil cylinder (2.5) is a fixed end and is hinged to the first sliding base (2.1), and the other end is an operation end and is hinged to the first telescopic arm.

5. The integrated tunneling device of claim 4, wherein, The pitch angle adjusting assembly (2.3) comprises a side support oil cylinder, one end of which is hinged to the first sliding base (2.1), and the other end is hinged to the first telescopic arm.

6. The integrated tunneling device according to any one of claims 1 to 5, wherein Further comprising a lifting and retracting support assembly (6); the lifting and retracting support assembly (6) comprises a first lifting and retracting support single piece and a second lifting and retracting support single piece; the first lifting and retracting support single piece is arranged below the first guide rail outside the vehicle tail, one end of which is a fixed end and is connected to the first guide rail, and the other end is a telescopic end and is arranged to be telescopic to the ground; the second lifting and retracting support single piece is arranged below the second guide rail outside the vehicle tail, one end of which is a fixed end and is connected to the second guide rail, and the other end is a telescopic end and is arranged to be telescopic to the ground.

7. The integrated tunneling device of claim 6, wherein, Further comprising a telescopic support shoe assembly (7); the telescopic support shoe assembly (7) comprises a first telescopic support shoe single piece and a second telescopic support shoe single piece; the first telescopic support shoe single piece and the second telescopic support shoe single piece are symmetrically arranged on both sides of the vehicle body (1).

8. The integrated tunneling device of claim 7, wherein, The first traveling wheel pair (1.1) is a driving wheel pair; further comprising a second traveling wheel pair (1.2); the second traveling wheel pair (1.2) is a driven wheel pair and is arranged at the bottom of the guide rail assembly (4) outside the vehicle tail; Further comprising a main controller arranged on the vehicle body (1); the main controller is connected to the cutting assembly (2), the rock breaking assembly (3), the driving assembly (5), the lifting and retracting support assembly (6) and the telescopic support shoe assembly (7).

9. A method of tunneling with the integrated apparatus of claim 8, characterized in that, Comprising: Step S1, driving the vehicle body (1) to a predetermined position; the main controller opens the telescopic support shoe assembly (7) to support the tunnel wall on both sides; the main controller opens the lifting and retracting support assembly (6) to support the ground; Step S2, the main controller drives the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first telescopic arm (2.2) to the first Step S2, the main controller starts the cutting assembly (2) to cut the tunnel section; the main controller starts the first driving member to drive the first sliding base (2.1) to link the cutting assembly (2) to cut the tunnel section back and forth along the guide rail assembly (4) to form a cutting seam; after the cutting operation is completed, the main controller controls the cutting assembly (2) to return to the initial position; Step S3, the main controller starts the rock breaking assembly (3) to expand the tunnel section along the cutting seam; the main controller starts the second driving member to drive the second sliding base (3.1) to link the rock breaking assembly (3) to expand the tunnel section back and forth along the guide rail assembly (4); after the tunnel section expansion operation is completed, the main controller controls the rock breaking assembly (3) to return to the initial position; Step S4, the main controller retracts the telescopic support shoe assembly (7) and the lifting and retracting support assembly (6); Step S5, repeat steps S1-S4 until the entire tunnel section expansion operation is completed.

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