Microwave-laser synergistic rock-cracking test device

Abstract

The present invention relates to the field of rock mass cracking research and testing, and provides a microwave-laser synergistic rock-cracking test device, comprising: a laser generator, a microwave generator, a gas purging assembly, a connecting waveguide, and an image acquisition assembly; the laser generator is located above a specimen, an output end of the microwave generator is connected to the connecting waveguide, and an output end of the connecting waveguide faces a side surface of the specimen; the gas purging assembly is configured for blowing gas to a top surface of the specimen; the image acquisition assembly is located above the specimen and is configured for acquiring an image of the top surface of the specimen. The present invention uses a microwave generator and a laser generator to respectively generate microwaves and lasers that act on a rock specimen, causing cracks to develop in the rock specimen under heat, and then photographs the rock specimen in real time by means of an image acquisition assembly, so as to monitor and document, in real time, crack evolution in rocks during the synergistic action of microwaves and lasers, allowing for real-time observation of crack development and evolution patterns in rocks, and evaluation of data on mineral volume expansion, cracking and so forth.

Description

A microwave-laser synergistic rock-breaking experimental device Technical Field

[0001] This invention belongs to the field of rock mass crack research experiments, specifically involving a microwave laser-assisted rock breaking experimental device. Background Technology

[0002] As mining depth increases, the rock mass strength increases nonlinearly. Traditional mechanical excavation methods are inefficient and subject to rapid wear, severely hindering the safe and efficient development of deep coal resources. Microwave and laser, as rock-breaking methods with a wide fracturing range and high fracturing efficiency, hold promise for solving the problem of difficult and inefficient large-scale fracturing of deep hard rock. Therefore, research on hard rock fracturing combining microwave and laser technologies is of great significance for promoting the application of microwave-laser combined rock-breaking engineering.

[0003] Currently, most research on microwave and laser rock breaking is conducted independently. The rock fracturing characteristics and weakening effects under the combined action of the two technologies have not yet been investigated, and the enhancing effect of microwave on laser fracturing and the influence of the microwave-laser application sequence on fracturing characteristics have not been demonstrated. This invention patent's microwave-laser synergistic rock breaking equipment creatively combines these two novel rock breaking technologies, while also integrating acoustic emission and thermogravimetric monitoring. It can conduct microwave-laser combined rock breaking tests to demonstrate the amplifying effect of microwave on laser fracturing, providing technical and equipment support for the engineering applications of microwave and laser technologies. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a microwave-laser synergistic rock-breaking experimental device to solve the problems in the prior art. The technical solution adopted by this invention is as follows:

[0005] A microwave-laser coordinated rock-breaking experimental device includes: a laser generator, a microwave generator, a gas purging assembly, a connecting waveguide, and an imaging acquisition assembly;

[0006] The laser generator is located above the sample and is used to irradiate the top surface of the sample with a laser. The output end of the microwave generator is connected to the connecting waveguide, and the output end of the connecting waveguide faces the side of the sample. The gas purging assembly is used to blow gas onto the top surface of the sample. The imaging acquisition assembly is located above the sample and is used to acquire an image of the top surface of the sample.

[0007] Furthermore, the connecting waveguide includes a straight waveguide and a bent waveguide connected end to end. The entrance end of the straight waveguide is connected to the microwave generator, and the exit end of the bent waveguide is fixedly connected to a horn antenna. The exit end of the horn antenna faces the sample. Two connecting waveguides are symmetrically arranged and distributed on both sides of the sample.

[0008] Furthermore, the straight waveguide is a rectangular waveguide, and its dimensions satisfy the following formula conditions: λ / 2 < a < λ, 0 < b < λ / 2, 0.6λ < a < λ, b = a / 2, a ≥ 0.7λ.

[0009] Integration yields: a = 0.7λ, b = (0.4 ~ 0.5)a

[0010] Where f is the microwave frequency, a is the width of the straight waveguide, b is the height of the straight waveguide, and λ is the microwave wavelength.

[0011] Furthermore, the gas purging assembly includes an annular fixed base, a rotating ring, a tangential connecting pipe, and a gas source;

[0012] The annular fixing seat is fixedly installed above the sample. An annular groove is provided on the inner side of the annular fixing seat. The rotating ring is rotatably installed in the annular groove. The rotating ring is coaxially arranged with the annular fixing seat. One end of the tangential connecting pipe is fixedly connected to the side of the annular fixing seat. The other end of the tangential connecting pipe is connected to the gas source. The tangential connecting pipe is located in the outer tangential direction of the annular fixing seat.

[0013] An annular air cavity is formed between the outer surface of the rotating ring and the inner wall of the annular groove of the annular fixed seat. The tangential connecting pipe communicates with the annular air cavity. Multiple baffles are fixedly connected to the outer surface of the rotating ring. The baffles are located inside the annular air cavity. The tangential connecting pipe is used to blow gas from the gas source toward the baffles, thereby causing the rotating ring to rotate.

[0014] The rotating ring is provided with an air blowing hole, which is a through hole and connects to the annular air cavity. The air blowing hole is inclined, and its lower end opens on the inner side of the rotating ring.

[0015] Furthermore, a protective tube is fitted onto the laser head of the laser generator, and the protective tube is fixedly connected to the laser generator;

[0016] The laser generator is coaxially arranged with the rotating ring, or the laser generator is tilted; the protective tube is connected to the rotating ring.

[0017] Furthermore, the rotating ring is fixedly connected to the upright rod, which is vertically arranged. The top of the upright rod is slidably connected to a horizontally arranged adjusting rod, and the end of the adjusting rod is rotatably connected to a sliding sleeve. The sliding sleeve is movably fitted onto the protective tube, and the tilt angle of the laser generator can be adjusted by sliding the adjusting rod.

[0018] Furthermore, a sleeve is fixedly connected to the top of the upright pole, and the end of the adjusting rod away from the laser generator slidably passes through the sleeve. An adjusting bolt is threadedly connected to the top of the sleeve, and a rubber damping block is connected to the bottom of the adjusting bolt. The rubber damping block abuts against the adjusting rod, and a limiting block is fixedly connected to the adjusting rod. A spring is provided between the limiting block and the sleeve, and the spring is sleeved on the adjusting rod. The rubber damping block is used to form sliding damping between the adjusting rod and the spring, thereby causing the laser generator to rotate spirally or in a fixed circular motion under the action of the spring.

[0019] The present invention has the following beneficial effects: The present invention generates microwaves and lasers through microwave generators and laser generators respectively, which act on the rock sample to heat the rock sample and generate cracks. The rock sample is photographed in real time through imaging acquisition components. The rock crack evolution during the synergistic effect of microwaves and lasers can be monitored and recorded in real time. The development and evolution of rock cracks can be observed in real time, and data such as mineral volume expansion and fracture can be evaluated. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of a rectangular straight waveguide;

[0022] Figure 3 is a top view of the symmetrical arrangement of the connected waveguides;

[0023] Figure 4 is a schematic diagram of the laser generator when it is vertical;

[0024] Figure 5 is an enlarged view of point A in Figure 4;

[0025] Figure 6 is a top sectional view of the connection relationship of the rotating rings;

[0026] Figure 7 is a schematic diagram of the laser generator when tilted. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to Figures 1-7 in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0028] As shown in Figure 1, a microwave-laser coordinated rock-breaking experimental device includes: a laser generator 4, a microwave generator, a gas purging assembly, a connecting waveguide 2, and an imaging acquisition assembly.

[0029] The laser generator 4 is located above the sample 1 and is used to irradiate the top surface of the sample 1 with a laser. The output end of the microwave generator is connected to the connecting waveguide 2, and the output end of the connecting waveguide 2 faces the side of the sample 1. The gas cleaning assembly is used to blow gas onto the top surface of the sample 1. The imaging acquisition assembly is located above the sample 1 and is used to acquire an image of the top surface of the sample 1.

[0030] Laser generator 4 and microwave generator are existing technologies. The microwave generator is connected to a microwave power supply via a cable. The microwave power supply is connected to a power source, and a high-frequency power switch controls the microwave power supply to power the microwave generator. The microwave generator contains an excitation cavity, a magnetron, and a filament power supply. First, the microwave power supply preheats the filament power supply. During preheating, the filament power supply heats the magnetron cathode through current. When heated to a sufficiently high temperature, the magnetron cathode generates an electron beam. The electron beam is emitted from the accelerating electrode and guided by the magnetic field generated by the magnetic field ring, forming a bent electron beam. The energy change produced by the interaction between this electron beam and the magnetic field generates microwave radiation. At this time, the microwave is in TEM mode. The microwave propagates into the excitation cavity in the form of electromagnetic waves. When the microwave is transmitted into the excitation cavity through a coupler, the coupler converts the TEM mode microwave into TE mode through a specific guiding action. 10 Model, (TE) 10 The mold features a simple and stable field structure, wide bandwidth, and low loss. The laser is transmitted to a rectangular straight waveguide. The laser generator 4 is connected to the laser power supply via an optical cable.

[0031] The imaging acquisition component is based on existing technology, such as an industrial camera or infrared imager. It is used to acquire images of the sample 1 wall surface after being irradiated by a laser. The acquisition end of the imaging acquisition component can be located below the annular mounting base 8 to acquire clear images.

[0032] The sample 1 of this invention is a square rock sample.

[0033] As shown in Figures 2 and 3, the connecting waveguide 2 includes a straight waveguide and a bent waveguide connected end to end. The entrance end of the straight waveguide is connected to the microwave generator, and the exit end of the bent waveguide is fixedly connected to a horn antenna. The exit end of the horn antenna faces the sample 1. There are two connecting waveguides 2 symmetrically arranged and distributed on both sides of the sample 1.

[0034] To achieve simultaneous microwave action from both sides, a symmetrical arrangement of the waveguide on both sides is adopted, transmitting microwaves simultaneously. For example, when the microwave generator produces 6kW microwaves, 3kW microwaves are transmitted to the surface of rock sample 1 from both sides. The reason for using a symmetrical arrangement on both sides is that when microwaves penetrate the rock, electromagnetic energy is continuously converted into heat energy, and the electric field strength and power continuously attenuate. The penetration depth of microwaves into the rock can be expressed by the following formula:

[0035] In the formula, D is the field penetration depth, which represents the distance at which the field intensity attenuates to 36.8% (i.e. 1 / e) of the distance to the surface of the medium, and λ is the microwave wavelength.

[0036] In the formula, D P ε' is the power penetration depth, ε' is the real part of the complex dielectric constant, and ε” is the imaginary part of the complex dielectric constant, representing the distance at which power decays to 36.8% (i.e. 1 / e) of the dielectric surface.

[0037] In the formula, D 1 / 2 Half-power penetration depth represents the distance at which the power is reduced to half the distance at the surface of the medium.

[0038] Based on the three formulas above, when the loss coefficient of the heated rock remains constant, the penetration depth is on the same order of magnitude as the microwave wavelength. For example, for a 2.45 GHz microwave source with a wavelength λ = 12.2 cm, the penetration depth is typically several centimeters to tens of centimeters. Therefore, to ensure that the microwaves can penetrate the entire rock, symmetrically arranged horn antennas can achieve this even when the rock is very large. The horn antennas can be attached to the wall of sample 1.

[0039] The straight waveguide is a rectangular waveguide, taking into account the microwave generator transmitting TE. 10 Therefore, a rectangular straight waveguide needs to satisfy: (1) Only transmit the dominant mode TE. 10 (2) Sufficient power capacity (increase power capacity while avoiding breakdown); (3) Low loss. The specific dimensions satisfy the following calculation formula: λ / 2<a<λ 0<b<λ / 2 0.6λ<a<λ b=a / 2 a≥0.7λ

[0040] Integration yields: a = 0.7λ, b = (0.4 ~ 0.5)a

[0041] Where f is the microwave frequency, a is the width of the straight waveguide, b is the height of the straight waveguide, and λ is the microwave wavelength.

[0042] Additionally, the microwave generator can be connected to a straight waveguide via a circulator. The circulator is equipped with a water load, which has an inlet and an outlet. The inlet water pipe of the water load connects to a water pump, which is placed in a water tank. Water circulation is achieved through negative pressure. The outlet water pipe of the water load connects to the inlet of the microwave generator. After cooling the magnetron, the water returns to the water tank through the outlet pipe. The water in the water load is primarily used to absorb reflected microwaves, preventing them from entering the microwave generator through the circulator and damaging the magnetron. Furthermore, a microwave power meter is installed on the straight waveguide to monitor the incident and reflected power in real time.

[0043] As shown in Figures 4-7, the gas cleaning assembly includes an annular fixed base 8, a rotating ring 10, a tangential connecting pipe 9, and a gas source;

[0044] The annular fixing seat 8 is fixedly disposed above the sample 1. An annular groove is provided on the inner side of the annular fixing seat 8. The rotating ring 10 is rotatably disposed in the annular groove. The rotating ring 10 is coaxially disposed with the annular fixing seat 8. One end of the tangential connecting pipe 9 is fixedly connected to the side of the annular fixing seat 8. The other end of the tangential connecting pipe 9 is connected to the gas source. The tangential connecting pipe 9 is located in the outer tangential direction of the annular fixing seat 8.

[0045] An annular air cavity 22 is formed between the outer surface of the rotating ring 10 and the inner wall of the annular groove of the annular fixed seat 8. The tangential connecting pipe 9 communicates with the annular air cavity 22. A plurality of baffles 21 are fixedly connected to the outer surface of the rotating ring 10. The baffles 21 are located in the annular air cavity 22. The tangential connecting pipe 9 is used to blow gas from the gas source toward the baffles 21, thereby causing the rotating ring 10 to rotate.

[0046] The rotating ring 10 is provided with an air hole 11, which is a through hole and connects to the annular air chamber 22. The air hole 11 is inclined, and its lower end opens on the inner side of the rotating ring 10.

[0047] This invention utilizes a gas purging assembly to remove dust generated during laser rock breaking. The gas source is existing technology, such as high-pressure gas cylinders, air pumps, etc. The outer surface of the annular fixing seat 8 can be fixedly connected by a bracket, which stands on the ground. The outer diameter of the rotating ring 10 is smaller than the inner diameter of the annular groove, thus forming a uniform annular air cavity 22. Multiple baffles 21 are evenly distributed around the outer surface of the rotating ring 10, with gaps between the baffles 21 and the inner wall of the annular groove. The annular fixing seat 8 and the rotating ring 10 are on a horizontal plane, while the air blowing hole 11 is inclined relative to this horizontal plane, with the inner end of the air blowing hole 11 tilted downwards to ensure that the gas is blown onto the top surface of the sample 1.

[0048] When gas is input into the tangential connecting pipe 9, the high-speed gas enters the annular gas chamber 22 along the tangential direction of the annular fixed seat 8, thereby forming a rotating airflow. Under the action of this rotating airflow and the blowing of the gas, the rotating ring 10 is driven to rotate by multiple baffles 21, and the high-speed gas is ejected through the blowing holes 11. Thus, the blowing holes 11 rotate around the axis of the rotating ring 10, forming a rotating purging, which purifies the top surface of the sample 1 from all directions.

[0049] The upper and lower end faces of the rotating ring 10 can be connected to the annular fixed seat 8 via a sealed bearing and sealing grease.

[0050] Furthermore, a protective tube 7 is fitted onto the laser head 6 of the laser generator 4, and the protective tube 7 is fixedly connected to the laser generator 4;

[0051] The laser generator 4 is coaxially arranged with the rotating ring 10, or the laser generator 4 is inclined; the protective tube 7 is connected to the rotating ring 10.

[0052] The top of the laser generator 4 is connected to a bracket via a ball joint 5. The bracket stands on the ground, thus fixing the laser generator 4 in place and allowing it to rotate. The protective tube 7 is a hollow structure, designed to protect the laser head 6 and connect to the rotating ring 10.

[0053] When the laser generator 4 is coaxially set with the rotating ring 10, as shown in Figure 4, the laser generator 4 is in a vertical state. At this time, the laser emitted by the laser generator 4 shines vertically downwards onto the top surface of the sample 1, forming a fixed-point irradiation function.

[0054] When the laser generator 4 is tilted, as shown in Figure 7, the ball joint 5 is always on the axis of the rotating ring 10, while the lower end of the laser generator 4 is tilted outward, thus causing the emitted laser to irradiate different positions. Furthermore, as the rotating ring 10 rotates, the laser generator 4 rotates along with it, so the irradiated laser forms a fixed circle or a spiral around the axis of the rotating ring 10.

[0055] The purpose of this design is to investigate the fracture changes of sample 1 under different laser irradiation ranges. Compared to point irradiation, circumferential or spiral irradiation results in a larger contact area between the laser and sample 1, while point irradiation is relatively more energy-concentrated.

[0056] Furthermore, the rotating ring 10 is fixedly connected to the upright rod 12, the upright rod 12 is vertically arranged, and the top of the upright rod 12 is slidably connected to the horizontally arranged adjusting rod 13. The end of the adjusting rod 13 is rotatably connected to the sliding sleeve 20, and the sliding sleeve 20 is movably sleeved on the protective tube 7. The tilt angle of the laser generator 4 can be adjusted by sliding the adjusting rod 13.

[0057] Furthermore, a sleeve 17 is fixedly connected to the top of the upright rod 12, and the end of the adjusting rod 13 away from the laser generator 4 can slide through the sleeve 17. An adjusting bolt 18 is threadedly connected to the top of the sleeve 17, and a rubber damping block 19 is connected to the bottom of the adjusting bolt 18. The rubber damping block 19 abuts against the adjusting rod 13. A limiting block 15 is fixedly connected to the adjusting rod 13, and a spring 16 is provided between the limiting block 15 and the sleeve 17. The spring 16 is sleeved on the adjusting rod 13, and the rubber damping block 19 is used to form sliding damping between it and the adjusting rod 13, so that the laser generator 4 can rotate spirally or rotate in a fixed circle under the action of the spring 16.

[0058] The sleeve 17 is a hollow structure, with the bottom of the adjusting bolt 18 located inside the sleeve 17. A groove 14 can be provided at the top of the adjusting rod 13, and a rubber damping block 19 is located within the groove. The bottom of the adjusting bolt 18 can abut against or rotatably connect to the rubber damping block 19. The rubber damping block 19 can be made of rubber and is elastic. When the adjusting bolt 18 is tightened, the sliding damping between the rubber damping block 19 and the adjusting rod 13 increases. Furthermore, when the adjusting bolt 18 is tightened to a certain position, the compression of the rubber damping block 19 eliminates the elastic force of the spring 16, keeping the adjusting rod 13 stationary. The spring 16 acts as a reset mechanism, pushing the adjusting rod 13 to return the laser generator 4 to a vertical axis position.

[0059] When the adjusting bolt 18 is tightened and the rubber damping block 19 has a certain sliding damping with the adjusting rod 13, the adjusting rod 13 moves slowly under the action of the spring 16, and the laser generator 4 slowly returns to the vertical state. In this process, under the rotation of the rotating ring 10, the laser generator 4 makes a spiral motion with a gradually decreasing radius of rotation, forming a spiral laser sweep line.

[0060] When the adjusting bolt 18 is tightened and the rubber damping block 19 is fully compressed to keep the adjusting rod 13 stationary, the position of the adjusting rod 13 can be adjusted, thereby adjusting the tilt angle of the laser generator 4. Then, under the rotation of the rotating ring 10, the laser generator 4 rotates in a fixed circle to form a fixed circle laser sweep line.

[0061] When the adjusting bolt 18 is tightened and the rubber damping block 19 is fully compressed until the adjusting rod 13 remains stationary, the position of the adjusting rod 13 is adjusted to reset the spring 16, allowing the laser generator 4 to be set vertically. Then, under the rotation of the rotating ring 10, the laser generator 4 forms a concentrated, fixed-point laser irradiation. Furthermore, a large gap can be provided between the protective tube 7 and the sliding sleeve 20 so that the rotation of the sliding sleeve 20 does not affect the protective tube 7. The laser generator 4 remains vertical under its own weight and does not rotate with the protective tube 7.

[0062] This invention provides three different laser irradiation trajectories to explore the effects of different irradiation ranges and trajectories on rock fracturing. In specific experiments, multiple control groups can be set up to form experimental data.

[0063] In addition, multiple air blowing holes 11 can be provided. The air blowing holes 11 and the upright rod 12 are distributed on both sides of the rotating ring 10. When the laser generator 4 is tilted, it always tilts away from the air blowing holes 11. That is to say, the airflow blown out of the air blowing holes 11 will also rotate and sweep. Moreover, the blowing direction of the air blowing holes 11 is always towards the laser irradiation point, so as to form a more effective sweeping. The airflow moves through the air blowing holes 11 to the top surface of the sample 1, and then moves on the top surface of the sample 1 to carry away the dust.

[0064] Acoustic emission probes can also be set on the front and back surfaces of sample 1. To ensure the monitoring effect, three acoustic emission probes are arranged in a symmetrical and inverted triangular pattern, respectively on the front and back surfaces of the rock. The decibel threshold of the acoustic emission probes is adjusted to ensure that noise interference is filtered out and the data accuracy is affected. When cracks appear inside the rock, an acoustic signal is generated. The six probes simultaneously capture and locate the acoustic signal and record it in the acoustic emission software to record the time of internal fracture of sample 1.

[0065] After connecting all the instruments, the microwave power and time are set to begin the experiment. The computer records infrared images and images captured by an industrial camera during the microwave experiment. During this process, special attention must be paid to synchronizing the infrared imaging recording time with the industrial camera's image capture time to facilitate analysis of the crack initiation time and temperature.

[0066] This invention generates microwaves and lasers through a microwave generator and a laser generator 4, respectively, which are applied to a rock sample 1 to heat the rock sample 1 and induce cracks. The rock sample 1 is then photographed in real time by an imaging acquisition component. This allows for real-time monitoring and recording of the crack evolution of the rock during the synergistic action of microwaves and lasers, enabling real-time observation of the development and evolution of rock cracks and assessment of mineral volume expansion.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A microwave-laser synergistic rock-breaking experimental device, characterized in that, include: Laser generator (4), microwave generator, gas purging assembly, connecting waveguide (2) and imaging acquisition assembly; The laser generator (4) is located above the sample (1) and is used to irradiate the top surface of the sample (1) with a laser. The output end of the microwave generator is connected to the connecting waveguide (2), and the output end of the connecting waveguide (2) faces the side of the sample (1). The gas cleaning assembly is used to blow gas to the top surface of the sample (1). The imaging acquisition assembly is located above the sample (1) and is used to acquire the image of the top surface of the sample (1).

2. The microwave-laser synergistic rock-breaking experimental device according to claim 1, characterized in that, The connecting waveguide (2) includes a straight waveguide and a bent waveguide connected end to end. The entrance end of the straight waveguide is connected to the microwave generator, and the exit end of the bent waveguide is fixedly connected to a horn antenna. The exit end of the horn antenna faces the sample (1). There are two connecting waveguides (2) symmetrically arranged and distributed on both sides of the sample (1).

3. The microwave-laser synergistic rock-breaking experimental device according to claim 2, characterized in that, The straight waveguide is a rectangular waveguide, and its dimensions satisfy the following formula conditions: λ / 2 < a < λ, 0 < b < λ / 2, 0.6λ < a < λ, b = a / 2, a ≥ 0.7λ. The result of integration is: a = 0.7λ b = (0.4 ~ 0.5)a Where f is the microwave frequency, a is the width of the straight waveguide, b is the height of the straight waveguide, and λ is the microwave wavelength.

4. The microwave-laser synergistic rock-breaking experimental device according to claim 2, characterized in that, The gas purging assembly includes an annular fixed base (8), a rotating ring (10), a tangential connecting pipe (9), and a gas source; The annular fixing seat (8) is fixedly disposed above the sample (1). An annular groove is provided on the inner side of the annular fixing seat (8). The rotating ring (10) is rotatably disposed in the annular groove. The rotating ring (10) is coaxially disposed with the annular fixing seat (8). One end of the tangential connecting pipe (9) is fixedly connected to the side of the annular fixing seat (8). The other end of the tangential connecting pipe (9) is connected to the gas source. The tangential connecting pipe (9) is located in the outer tangential direction of the annular fixing seat (8). An annular air cavity (22) is formed between the outer side of the rotating ring (10) and the inner wall of the annular groove of the annular fixed seat (8). The tangential connecting pipe (9) connects to the annular air cavity (22). Multiple baffles (21) are fixedly connected to the outer side of the rotating ring (10). The baffles (21) are located in the annular air cavity (22). The tangential connecting pipe (9) is used to blow the gas from the gas source toward the baffles (21), thereby causing the rotating ring (10) to rotate. The rotating ring (10) is provided with an air blowing hole (11), which is a through hole and connects to the annular air cavity (22). The air blowing hole (11) is inclined, and the lower end of the hole is located on the inner side of the rotating ring (10).

5. The microwave-laser synergistic rock-breaking experimental device according to claim 4, characterized in that, A protective tube (7) is fitted onto the laser head (6) of the laser generator (4), and the protective tube (7) is fixedly connected to the laser generator (4); The laser generator (4) is coaxially arranged with the rotating ring (10), or the laser generator (4) is inclined; the protective tube (7) is connected to the rotating ring (10).

6. The microwave-laser synergistic rock-breaking experimental device according to claim 5, characterized in that, The rotating ring (10) is fixedly connected to the upright rod (12), the upright rod (12) is vertically set, the top of the upright rod (12) is slidably connected to the horizontally set adjusting rod (13), the end of the adjusting rod (13) is rotatably connected to the sliding sleeve (20), the sliding sleeve (20) is movably sleeved on the protective tube (7), and the tilt angle of the laser generator (4) is adjusted by sliding the adjusting rod (13).

7. The microwave-laser synergistic rock-breaking experimental device according to claim 6, characterized in that, The top of the pole (12) is fixedly connected to a sleeve (17). The end of the adjusting rod (13) away from the laser generator (4) can slide through the sleeve (17). The top of the sleeve (17) is threadedly connected to an adjusting bolt (18). The bottom of the adjusting bolt (18) is connected to a rubber damping block (19). The rubber damping block (19) abuts against the adjusting rod (13). A limiting block (15) is fixedly connected to the adjusting rod (13). A spring (16) is provided between the limiting block (15) and the sleeve (17). The spring (16) is sleeved on the adjusting rod (13). The rubber damping block (19) is used to form sliding damping between the adjusting rod (13), so that the laser generator (4) rotates spirally or rotates in a fixed circle under the action of the spring (16).

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