Microwave-assisted boulder treatment device and method

Abstract

The invention discloses a microwave-assisted boulder treatment device and method, and relates to the field of tunnel construction, the device comprises a microwave-assisted boulder cracking mechanism and a microwave generation device, and the microwave-assisted boulder cracking mechanism comprises a microwave coaxial drill rod used for stretching into rock; the microwave generating device comprises a microwave generator used for emitting microwave energy, and the microwave generator is connected with the microwave coaxial drill rod through an aluminum alloy pipe. When boulders appear, the multi-axis mechanical arm mechanism is started to extend forwards, and the microwave coaxial drill rod is driven to extend out; the microwave coaxial drill rod is started, and holes are drilled in the boulder; the microwaves coaxially extend out, a microwave generator is started after the microwaves reach a drill hole, microwave energy is transmitted to the front microwave coaxial shaft, the energy is transmitted to surrounding rocks through the microwave coaxial shafts, mineral ions in the rocks can generate a thermal expansion effect after absorbing the microwave energy, and then fracturing of the rocks is achieved; the device is high in automation degree and easy and convenient to operate; the method is short in microwave fracturing time, small in disturbance, high in safety and better in effect.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, and in particular to a microwave-assisted boulder processing device and method. Background Art

[0002] The application of shield construction in my country's tunneling field has been relatively mature, but excavation in poor geology is still a problem that needs to be solved urgently. In particular, when excavating in uneven strata, the sudden encounter of boulders will greatly affect the speed of the shield machine. There are currently two main methods to deal with this problem. When the volume of the boulder in front is small, it is generally attempted to use the shield to slowly excavate through, but it is still inevitable that the excavation speed is slow, the tool wear is serious, and even the cutterhead is stuck. When the volume of the boulder is large, the cost of direct shield excavation is high. In the project, a rock splitter is used to split the boulder rock mass during pressure entry. However, this method is risky and inefficient to operate under pressure. Second, the integrity of the boulder is good and there is no air surface. The splitting effect of the rock splitter cannot meet expectations, and the rock splitter is expensive.

[0003] In the prior art, in the published patent literature, patent CN 109596022 B provides a method for blasting boulders in front of the shield cutter disc. This method uses 6000mm in front of the shield cutter disc as the dividing line, and divides the area within 6000mm from the cutter disc into the first blasting treatment area, and the area beyond 6000mm from the cutter disc into the subsequent blasting treatment area. Patent CN 209654040U discloses a perforating gun for blasting boulders and protruding rocks in subway shields. The device uses elastic buckles to fix the perforating bullets in the gun body, which is firmly installed. Moreover, due to the improvement of the charge liner, the interference between bullets is reduced and the perforating performance of the perforating bullet is improved. In existing research, the method for dealing with large boulders in front is mostly to use blasting cracking. In this method, the shock wave generated by the blasting has a large disturbance on the surrounding rock and is not suitable for all strata. Summary of the invention

[0004] The purpose of the present invention is to provide a microwave-assisted boulder processing device and method in order to solve the above-mentioned problems. The device uses microwave energy to cause cracking. Microwaves transmit energy to the surrounding rocks through microwave coaxiality. The mineral ions inside the rock will produce thermal expansion after absorbing microwave energy, thereby achieving rock cracking. The invention has the advantages of high degree of automation, simple and convenient operation, short microwave cracking time, small disturbance, high safety, and good effect.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A microwave-assisted boulder processing device comprises a microwave-assisted boulder-fracture mechanism and a microwave generating device, wherein the microwave-assisted boulder-fracture mechanism comprises a microwave coaxial drill rod for probing into the interior of a rock; the microwave generating device comprises a microwave generator for emitting microwave energy, and the microwave generator is connected to the microwave coaxial drill rod through an aluminum alloy tube; the microwave coaxial drill rod comprises a microwave coaxial and a spiral hollow drill rod sleeved outside the microwave coaxial, a track groove for enabling the microwave coaxial to move telescopically is provided on the inner wall of the spiral hollow drill rod, a spring is installed inside the front end of the track groove, and a hydraulic oil pipe is connected to the rear end, spiral rotating teeth are arranged on the outer surface of the spiral hollow drill rod, a hollow drill bit is provided at the front end of the spiral hollow drill rod, and microwaves emitted by the microwave generator are transmitted to the microwave coaxial through the aluminum alloy tube at the tail of the spiral hollow drill rod for propagation; a piston ring is fixedly installed in the middle section of the outer surface of the microwave coaxial, which can coordinate with the track groove to realize the advancement and retraction of the microwave coaxial.

[0007] Preferably: the microwave-assisted rock fracturing mechanism also includes a driving motor for driving the microwave coaxial drill pipe to rotate, a driving gear is fixedly installed on the output end of the driving motor, a driven gear is fixedly installed on the rear end of the microwave coaxial drill pipe, and the driven gear is meshed with the driving gear.

[0008] Preferably: the piston ring seals and divides the sealing space between the track groove on the inner wall of the spiral hollow drill rod and the microwave coaxial into two parts, and the spring is pressed on the piston ring to ensure that the hydraulic oil will not penetrate into the front spring part through the piston ring during the oil injection and pressure application process of the hydraulic oil pipe at the tail end, thereby realizing the advancement of the piston ring. When it is necessary to retract, the pressure is released through the hydraulic oil pipe, and the piston ring drives the microwave coaxial to retract under the elastic force of the spring.

[0009] Preferably, a protective shell is provided outside the microwave coaxial drill rod, the rear end of the microwave coaxial drill rod is connected to an aluminum tube, and an end of the aluminum tube away from the microwave coaxial drill rod is fixedly connected to an alloy plate.

[0010] Preferably, a metal bracket for fixedly connecting with the alloy plate is provided outside the aluminum tube.

[0011] Preferably, the microwave-assisted boulder fracturing mechanism comprises three groups of microwave coaxial drill rods, the end of the microwave coaxial drill rods in contact with the boulder is the front end, and there is a certain distance between the front ends of the three groups of microwave coaxial drill rods.

[0012] Preferably: the microwave-assisted boulder processing device also includes a multi-axis robotic arm mechanism and a rotating support seat; the multi-axis robotic arm mechanism includes a retractable first-level robotic arm and a second-level robotic arm and a swingable third-level robotic arm; the first-level robotic arm includes a hydraulic drive device; the second-level robotic arm and the third-level robotic arm are respectively rotatably connected to the rotating support seat through a fourth connecting shaft, the second-level robotic arm is rotatably connected to the middle of the hydraulic drive device through a first connecting shaft at one end away from the rotating support seat, the third-level robotic arm is rotatably connected to a connecting rod at one end away from the rotating support seat through a third connecting shaft, and the connecting rod is rotatably connected to the rear end of the hydraulic drive device at one end away from the rotating support seat through a second connecting shaft; the alloy plate is fixedly mounted on the mobile end of the hydraulic drive device.

[0013] Preferably, a protective mechanism is installed at the front end of the microwave coaxial line to prevent the coaxial line from being damaged by debris during the process of irradiating the rock.

[0014] Preferably: the protection mechanism is high temperature heat-resistant ceramic.

[0015] A microwave-assisted boulder treatment method, using a microwave-assisted boulder treatment device as described above, comprises the following steps:

[0016] Step S1: When a rock appears in front of the tunnel face, the shield machine is controlled to stop, and the multi-axis mechanical arm mechanism is started to adjust the height and angle of the microwave coaxial drill rod and push the microwave coaxial drill rod forward;

[0017] Step S2: the microwave coaxial drill rod contacts the boulder on the face of the tunnel, the motor is started, and the microwave coaxial drill rod drills a hole on the boulder;

[0018] Step S3: After the drilling is completed, the external hydraulic pump supplies oil to the rear of the track groove through the hydraulic oil pipe, pushing the piston ring forward, and the microwave coaxial extends forward. After reaching the drilled hole, the microwave generator is started, and the microwave energy is transmitted to the front microwave coaxial to achieve cracking inside the solitary stone;

[0019] Step S4: After the isolated rock is fractured, the microwave coaxial drill rod retreats, and the cutter head of the shield machine rotates to break the isolated rock.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention combines the new microwave rock breaking with the traditional mechanical rock breaking, and realizes more automatic, efficient and safe blasting of isolated rocks with the assistance of the mechanical arm;

[0022] 2. The energy distribution of the microwave on the coaxial axis of the present invention shows a law that the energy density gradually decreases from the bottom to the top of the front end, and three microwave coaxial drill rod structures are set at the same time, and the front ends of the three microwave coaxial drill rod structures have a certain spacing. Such a structural design can make the microwave coaxial drill rod structure break at three positions on the boulder at the same time, and the three positions are triangular, which can realize full utilization of microwave energy, and the three breaking positions with a certain spacing can fully crack the boulder, such as Figure 7 As shown;

[0023] 3. Compared with the traditional method of blasting to deal with isolated rocks, microwave-assisted treatment of isolated rock structures has the advantages of less disturbance to the surrounding rock, high safety performance, and short fracturing time, which is safer and more efficient;

[0024] 4. The overall structure of the device is small, occupies little space, and can realize the loading and disassembly of the shield. Therefore, it has the advantages of simple operation and strong practicality, and is simpler and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the overall structure of a microwave-assisted boulder processing device according to the present invention;

[0027] Figure 2 It is a schematic structural diagram of a microwave-assisted boulder fracturing mechanism of a microwave-assisted boulder processing device according to the present invention;

[0028] Figure 3 It is a schematic diagram of the position arrangement of the microwave coaxial drill rod in the microwave-assisted boulder fracturing mechanism of the microwave-assisted boulder processing device described in the present invention;

[0029] Figure 4 It is a schematic diagram of a microwave coaxial drill pipe of a microwave-assisted boulder processing device according to the present invention being driven by a central gear shaft;

[0030] Figure 5 It is a cross-sectional view of a microwave coaxial drill pipe of a microwave-assisted boulder processing device according to the present invention;

[0031] Figure 6 It is a schematic structural diagram of a microwave coaxial device for microwave-assisted boulder processing according to the present invention;

[0032] Figure 7It is a structural diagram of a track groove of a microwave-assisted boulder treatment device according to the present invention;

[0033] Figure 8 It is a schematic diagram of a triangular microwave coaxial probe into rock for breaking a microwave-assisted boulder processing device according to the present invention.

[0034] The following are the descriptions of the reference numerals:

[0035] 1. Microwave coaxial drill pipe; 11. Microwave coaxial; 12. Piston ring; 13. Protection mechanism; 14. Track groove; 15. Spiral hollow drill pipe; 16. Spiral rotating teeth; 17. Hollow drill bit; 18. Hydraulic oil pipe; 19. Spring; 2. Microwave assisted rock fracturing mechanism; 21. Metal protective shell; 22. Aluminum tube; 23. Metal bracket; 24. Alloy plate; 25. Aluminum tube wall; 26. Microwave transmission aluminum tube interior; 27. Driven gear; 28. Driving gear; 3. Multi-axis robotic arm mechanism; 31. Primary robotic arm; 33. Secondary robotic arm; 34. Rotary support seat; 35. Connecting rod; 36. First connecting shaft; 37. Second connecting shaft; 38. Third connecting shaft; 39. Fourth connecting shaft; 310. Hydraulic drive device; 311. Third-stage robotic arm; 4. Microwave generating device; 5. Microwave energy; 6. Rock. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] The present invention will be further described below in conjunction with the accompanying drawings:

[0039] Example 1

[0040] like Figure 1-Figure 8 As shown, a microwave-assisted boulder processing device comprises a microwave-assisted boulder fracturing mechanism 2 and a microwave generating device 4, wherein the microwave-assisted boulder fracturing mechanism 2 comprises a microwave coaxial drill rod 1 for probing into a rock 6; the microwave generating device 4 comprises a microwave generator for emitting microwave energy 5, and the microwave generator is connected to the microwave coaxial drill rod 1 through an aluminum alloy tube; the microwave coaxial drill rod 1 comprises a microwave coaxial 11 and a spiral hollow drill rod 15 sleeved on the outside of the microwave coaxial 11, and a track groove 14 for telescopically moving the microwave coaxial 11 is provided on the inner wall of the spiral hollow drill rod 15, and a spring 19 is installed at the front end of the track groove 14, and a liquid is connected at the rear end A pressure oil pipe 18 and a spiral rotating tooth 16 are arranged on the outer surface of the spiral hollow drill rod 15. A hollow drill bit 17 with a through hole is arranged at the front end of the spiral hollow drill rod 15 to facilitate the microwave coaxial 11 to extend forward. The microwaves emitted by the microwave generator are transmitted to the microwave coaxial 11 through the aluminum alloy tube at the tail of the spiral hollow drill rod 15 for propagation. The microwaves transmit energy to the surrounding rocks through the microwave coaxial. The mineral ions inside the rock will produce thermal expansion after absorbing the microwave energy, thereby achieving rock fracturing. A piston ring 12 is fixedly installed in the middle section of the outer surface of the microwave coaxial 11, which can coordinate with the track groove 14 to achieve the advancement and retraction of the microwave coaxial 11.

[0041] In this embodiment, the microwave-assisted rock fracturing mechanism 2 also includes a driving motor (not shown in the figure) for driving the microwave coaxial drill pipe 1 to rotate. A driving gear 28 is fixedly installed on the output end of the driving motor, and a driven gear 27 is fixedly installed on the rear end of the microwave coaxial drill pipe 1. The driven gear 27 is meshed with the driving gear 28.

[0042] In this embodiment, the piston ring 12 seals and divides the sealing space between the track groove 14 on the inner wall of the spiral hollow drill rod 15 and the microwave coaxial 11 into two parts, and the spring 19 is pressed against the piston ring 12 to ensure that the hydraulic oil will not penetrate into the front spring 19 part through the piston ring 12 during the oil injection and pressure application process of the tail end hydraulic oil pipe 18, thereby realizing the advancement of the piston ring 12. When it is necessary to retract, the pressure is released through the hydraulic oil pipe, and the piston ring 12 drives the microwave coaxial 11 to retract under the elastic force of the spring.

[0043] In this embodiment, a protective shell 21 is provided on the outside of the microwave coaxial drill rod 1 for protection. The rear end of the microwave coaxial drill rod 1 is connected to an aluminum tube 22. An end of the aluminum tube 22 away from the microwave coaxial drill rod 1 is fixedly connected to an alloy plate 24. The drive motor is installed in the aluminum tube 22. A metal bracket 23 for fixedly connecting to the alloy plate 24 is provided on the outside of the aluminum tube 22. The metal bracket 23 is used to strengthen the connection between the aluminum tube 22 and the alloy plate 24.

[0044] In this embodiment, the microwave-assisted rock-breaking mechanism 2 includes three groups of microwave coaxial drill rods 1, and the three groups of microwave coaxial drill rods are arranged in a triangular dispersed distribution. The triangular microwave coaxial drill rod design can reduce the space occupancy rate of the structure before the coaxial extension, and on the other hand, can greatly maximize the utilization of microwave energy-assisted rock-breaking efficiency. The end of the microwave coaxial drill rod 1 that contacts the rock is the front end, and there is a certain distance between the front ends of the three groups of microwave coaxial drill rods 1.

[0045] In this embodiment, the microwave-assisted boulder processing device also includes a multi-axis robotic arm mechanism 3 and a rotating support seat 34; the multi-axis robotic arm mechanism 3 includes a retractable first-level robotic arm 31 and a second-level robotic arm 33 and a swingable third-level robotic arm 311; the first-level robotic arm 31 includes a hydraulic drive device 310; the second-level robotic arm 33 and the third-level robotic arm 311 are respectively rotatably connected to the rotating support seat 34 through a fourth connecting shaft 39, and the second-level robotic arm 33 is rotatably connected to the middle of the hydraulic drive device 310 through a first connecting shaft 36 at one end away from the rotating support seat 34, and the third-level robotic arm 311 is rotatably connected to a connecting rod 35 at one end away from the rotating support seat 34 through a third connecting shaft 38, and the connecting rod 35 is rotatably connected to the rear end of the hydraulic drive device 310 at one end away from the rotating support seat 34 through a second connecting shaft 37; the alloy plate 24 is fixedly mounted on the moving end of the hydraulic drive device 310.

[0046] In this embodiment, a protection mechanism 13 made of high-temperature heat-resistant ceramic is installed at the front end of the microwave coaxial 11 to prevent the coaxial 11 from being damaged by debris when the microwave coaxial 11 is irradiating rocks.

[0047] This embodiment also provides a microwave-assisted boulder treatment method, comprising the following steps:

[0048] Step S1: When a boulder appears in front of the tunnel face, the shield machine is controlled to stop, and the multi-axis mechanical arm mechanism 3 fixed at the manhole position of the soil bin is started, and the secondary mechanical arm 33 is extended and the tertiary mechanical arm 311 is adaptively swung to ensure that the hydraulic drive device 310 rises or falls horizontally, so as to achieve the height adjustment of the microwave coaxial 11 drill rod 1; the secondary mechanical arm 33 remains stationary, the tertiary mechanical arm 311 swings, and the connecting rod 35 pulls the hydraulic drive device 310 to swing, so as to achieve the angle adjustment of the microwave coaxial 11 drill rod 1; the microwave coaxial 11 drill rod 1 can be advanced and retreated by extending and retracting the primary mechanical arm 31;

[0049] Step S2: The microwave coaxial drill rod 1 contacts the boulder on the face of the tunnel, the driving motor is started, the driving gear 28 and the driven gear 27 are driven, and the microwave coaxial drill rod 1 drills a hole on the boulder; the rock 6 debris is transported to the soil bin by the spiral rotating teeth 16 arranged outside the spiral hollow drill rod 15; wherein, the microwave coaxial drill rod 1 occupies a small space before the drill rod is extended, so it can contact the face of the tunnel through the cutterhead gap, and after contacting the face of the tunnel, the drill rod is extended to perform drilling, and is retracted after the drilling is completed, and then the multi-axis mechanical arm mechanism 3 drives the microwave coaxial drill rod 1 to retreat;

[0050] In this step, the volume of the boulder determines the drilling depth of the microwave coaxial drill rod 1 on the boulder, and the drilling depth determines the radiation depth of the microwave energy 5. The microwave energy 5 is strongest at the bottom of the microwave coaxial drill rod 11, so a group of microwave coaxial drill rods 11 protruding at different angles can fully utilize the microwave energy 5 and completely fracture the rock 6.

[0051] Step S3: After the drilling is completed, the external hydraulic pump supplies oil to the rear of the track groove 14 through the hydraulic oil pipe 18, pushing the piston ring 12 forward, and the microwave coaxial 11 extends forward to reach the deepest part of the drilled hole (the drilling depth is generally about centimeters), and then the microwave generator is started, and the microwave energy is transmitted to the front microwave coaxial 11 through the aluminum tube 22, thereby achieving the cracking inside the solitary stone in a very short time;

[0052] In this step, microwave energy 5 may leak during the transmission of microwaves in the aluminum tube 22, so the connection of the aluminum tube 22 should be sealed to prevent microwave leakage.

[0053] Step S4: After the isolated rock is fractured, the microwave coaxial drill rod 1 is retracted, and the cutter head of the shield machine rotates to break the isolated rock.

[0054] The microwave coaxial drill rod 1, the first-stage robotic arm 31, the second-stage robotic arm 33, the rotary support seat 34, the hydraulic drive device 310, the third-stage robotic arm 311, and the microwave generating device 4 are all universal standard parts or parts known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods, so they will not be described in detail here.

[0055] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating 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, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A microwave-assisted boulder processing device, comprising a microwave-assisted boulder cracking mechanism (2) and a microwave generating device (4), characterized in that: The microwave-assisted rock-fracture mechanism (2) comprises a microwave coaxial drill rod (1) for probing into the interior of a rock (6); the microwave generating device (4) comprises a microwave generator for emitting microwave energy (5), and the microwave generator is connected to the microwave coaxial drill rod (1) via an aluminum alloy tube; The microwave coaxial drill rod (1) comprises a microwave coaxial rod (11) and a spiral hollow drill rod (15) sleeved on the outside of the microwave coaxial rod (11); a track groove (14) for enabling the microwave coaxial rod (11) to move telescopically is provided on the inner wall of the spiral hollow drill rod (15); a spring (19) is installed at the front end of the track groove (14) and a hydraulic oil pipe (18) is connected to the rear end; spiral rotating teeth (16) are arranged on the outer surface of the spiral hollow drill rod (15); a hollow drill bit (17) is provided at the front end of the spiral hollow drill rod (15); microwaves emitted by the microwave generator are transmitted to the microwave coaxial rod (11) through an aluminum alloy tube at the rear end of the spiral hollow drill rod (15) for propagation; and a piston ring (12) is fixedly installed in the middle section of the outer surface of the microwave coaxial rod (11) and can coordinate with the track groove (14) to realize the advancement and retraction of the microwave coaxial rod (11).

2. The microwave-assisted boulder treatment device according to claim 1, characterized in that: The microwave-assisted rock-fracture mechanism (2) further comprises a driving motor for driving the microwave coaxial drill rod (1) to rotate, a driving gear (28) being fixedly mounted on the output end of the driving motor, a driven gear (27) being fixedly mounted on the rear end of the microwave coaxial drill rod (1), and the driven gear (27) being meshed with the driving gear (28).

3. The microwave-assisted boulder processing device according to claim 1, characterized in that: The piston ring (12) seals and divides the sealed space between the track groove (14) on the inner wall of the spiral hollow drill rod (15) and the microwave coaxial (11) into two parts. The spring (19) presses on the piston ring (12) to ensure that the hydraulic oil will not penetrate into the front spring (19) part through the piston ring (12) during the oil injection and pressure application process of the tail end hydraulic oil pipe (18), thereby realizing the advancement of the piston ring (12). When it is necessary to retreat, the pressure is released through the hydraulic oil pipe, and the piston ring (12) drives the microwave coaxial (11) to retreat under the elastic force of the spring.

4. The microwave-assisted boulder processing device according to claim 1, characterized in that: A protective shell (21) is provided outside the microwave coaxial drill rod (1); the rear end of the microwave coaxial drill rod (1) is connected to an aluminum tube (22); and an alloy plate (24) is fixedly connected to one end of the aluminum tube (22) away from the microwave coaxial drill rod (1).

5. The microwave-assisted boulder processing device according to claim 4, characterized in that: The aluminum tube (22) is provided with a metal bracket (23) on the outside for fixedly connecting with the alloy plate (24).

6. The microwave-assisted boulder processing device according to claim 1, characterized in that: The microwave-assisted boulder fracturing mechanism (2) comprises three groups of microwave coaxial drill rods (1), the end of the microwave coaxial drill rod (1) in contact with the boulder being the front end, and a certain distance is provided between the front ends of the three groups of microwave coaxial drill rods (1).

7. The microwave-assisted boulder processing device according to claim 1, characterized in that: The microwave-assisted boulder processing device further comprises a multi-axis mechanical arm mechanism (3) and a rotary support seat (34); the multi-axis mechanical arm mechanism (3) comprises a retractable primary mechanical arm (31), a secondary mechanical arm (33) and a swingable tertiary mechanical arm (311); the primary mechanical arm (31) comprises a hydraulic drive device (310); the secondary mechanical arm (33) and the tertiary mechanical arm (311) are respectively rotatably connected to the rotary support seat (34) via a fourth connecting shaft (39); the secondary mechanical arm (33) is away from the rotary support seat (34); One end of the rotary support seat (34) is rotatably connected to the middle of the hydraulic drive device (310) via a first connecting shaft (36); one end of the three-stage mechanical arm (311) away from the rotary support seat (34) is rotatably connected to a connecting rod (35) via a third connecting shaft (38); one end of the connecting rod (35) away from the rotary support seat (34) is rotatably connected to the rear end of the hydraulic drive device (310) via a second connecting shaft (37); the alloy plate (24) is fixedly mounted on the mobile end of the hydraulic drive device (310).

8. The microwave-assisted boulder processing device according to claim 1, characterized in that: The front end of the microwave coaxial (11) is provided with a protection mechanism (13), which can prevent the microwave coaxial (11) from being damaged by debris during the process of irradiating rocks.

9. The microwave-assisted boulder processing device according to claim 8, characterized in that: The protection mechanism (13) is made of high temperature heat-resistant ceramic.

10. A microwave-assisted boulder treatment method, characterized in that: A microwave-assisted boulder processing device as described in any one of claims 1 to 9 is used, comprising the following steps: Step S1: When a rock appears in front of the tunnel face, the shield machine is controlled to stop, and the multi-axis mechanical arm mechanism (3) is started to adjust the height and angle of the microwave coaxial drill rod (1) and to push the microwave coaxial drill rod (1) forward; Step S2: the microwave coaxial drill rod (1) contacts the boulder on the face of the tunnel, the drive motor is started, and the microwave coaxial drill rod (1) drills a hole on the boulder; Step S3: After the drilling is completed, the external hydraulic pump supplies oil to the rear of the track groove (14) through the hydraulic oil pipe, pushing the piston ring (12) forward, and the microwave coaxial (11) extends forward. After reaching the drilled hole, the microwave generator is started, and the microwave energy is transmitted to the front microwave coaxial to achieve cracking inside the solitary stone; Step S4: After the isolated rock is fractured, the microwave coaxial (11) drill rod is withdrawn, and the cutter head of the shield machine rotates to break the isolated rock.

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