Laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system and method

Abstract

The present invention provides a simulation test system and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform, comprising: a laser-mechanical combined drill tool, a drive device, a drill tool mounting device, a position adjustment device, and a confining pressure loading device. The drive device is used to rotate and propel the drill tool to achieve rock-breaking. The drill tool is fixed to the position adjustment device via the mounting device, enabling adjustment of the borehole space and relative angle. The confining pressure loading mechanism is used to apply confining pressure to the specimen, simulating a realistic geostress environment. The present invention achieves all-round and multi-angle continuous drilling through a displacement adjustment device; simulates a realistic geostress environment through the confining pressure loading device, and increases the combined rock-breaking efficiency by offsetting the laser. The multi-tube-in-tube structure solves the design challenges of the laser-mechanical integrated mounting system. Optimizing the pipeline layout within the drill pipe solves the problems of laser energy transmission and laser head cleaning and protection.

Description

Technical Field

[0001] The present invention relates to the technical field of long-distance drilling and rock breaking, and in particular to a laser-mechanical combined high-efficiency drilling and rock breaking platform simulation test system and method. Background Art

[0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Engineering geological drilling rigs can perform advance drilling and coring, understand the geological environment ahead of construction, identify unknown geological hazards, obtain surrounding geological information, and provide timely guidance for engineering construction operations, thus safeguarding the safe construction of underground projects. However, long-distance geological exploration is often required in underground engineering construction, and the construction process of existing advance drilling rigs is too long. The construction cycle for drilling holes over a distance of 100 meters exceeds one day. The construction site does not allow for a large amount of time to be spent on drilling construction, which limits the construction and application of long-distance advance drilling. In addition, when traditional drilling rigs encounter complex conditions such as highly abrasive hard rock, composite formations, and broken formations, the drilling efficiency of the project drops sharply, and abnormal wear and damage of equipment, drill jamming and buried drills often occur, and even safety accidents may occur.

[0004] In this context, a new generation of auxiliary rock breaking concepts based on new rock breaking methods such as lasers, water jets, microwaves, and particles has been proposed and has become a research hotspot and technological frontier in the field of international engineering drilling. Among the many new rock breaking methods, laser technology has the advantages of low energy, high efficiency, and easy implementation. It also has a relatively rich practical foundation in the field of petroleum engineering and is considered to be a very promising auxiliary rock breaking method.

[0005] Studies have shown that laser-assisted drilling can effectively improve rock-breaking efficiency, reaching drilling speeds over 10 times that of traditional drilling rigs. Laser-assisted drilling not only significantly improves drilling efficiency but also extends the service life of the drill bit and drill rod, effectively preventing accidents such as stuck drill and abnormal wear. Therefore, high-energy laser-assisted rock-breaking technology holds great research and application value in the field of engineering drilling.

[0006] The inventors found that when designing existing laser-assisted drilling construction devices, they are often unable to conduct optimized simulation tests based on specific application scenarios, resulting in poor integration and integration of the devices, which cannot meet actual needs; moreover, due to the particularity of laser circuits and laser heads, laser rock breaking has low efficiency and inadequate protection and cleaning of the laser head, which makes laser-assisted rock breaking technology have certain limitations in specific applications. Summary of the Invention

[0007] In order to address the shortcomings of the existing technology, the present invention provides a laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system and method, which realizes all-round and multi-angle continuous drilling, can truly simulate the drilling state and drilling posture of the geological drill rig, can effectively simulate the real stress environment, increase the combined rock-breaking efficiency, solve the design difficulties of laser-mechanical integrated mounting, and solve the problems of laser energy transmission and laser head cleaning and protection.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A first aspect of the present invention provides a laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system.

[0010] A laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system, comprising:

[0011] Confining pressure loading device for positioning, clamping and confining pressure loading of specimens;

[0012] A laser-mechanical combined drilling tool for performing laser-mechanical combined drilling;

[0013] A driving device for driving the laser combined drilling tool to perform combined drilling;

[0014] A drilling tool carrying device for carrying a laser-mechanical combined drilling tool and a driving device;

[0015] A position adjustment device is used to connect the drilling tool carrying device and adjust the relative position between the laser-mechanical combined drilling tool and the sample to change the drilling angle of the laser-mechanical combined drilling tool.

[0016] As a further limitation of the first aspect of the present invention, the confining pressure loading device includes: a sample base, a sample adjustment device, a confining pressure loading rock box and a confining pressure loading mechanism;

[0017] The sample base is used to carry the sample, the sample adjustment device is used to push the sample to the specified position of the confining pressure loading rock box, and the confining pressure loading mechanism is used to clamp and fix the rock sample and apply pressure to the rock sample.

[0018] As a further limitation of the first aspect of the present invention, the driving device includes: a rotary loading module and a thrust loading mechanism;

[0019] The rotary loading module includes a hydraulic motor, a reduction gear box, a drill rod clamping device, and a power head base. The drill rod clamping device is used to connect to the laser mechanical combined drilling tool. The hydraulic motor is connected to the drill rod clamping device via the reduction gear box. The reduction gear box and the drill rod clamping device are both connected to the power head base.

[0020] One end of the thrust loading mechanism is connected to the drilling tool carrying device, and the other end of the thrust loading mechanism is connected to the power head base. The thrust loading mechanism is used to apply thrust to the power head base to push the power head base forward, thereby driving the laser mechanical combined drilling tool to advance and break rock;

[0021] The drilling tool carrying device includes: a feed frame and a centralizer;

[0022] The power head base is slidably connected to the feed frame and is used to drive the laser-mechanical combined drilling tool to feed forward and retreat backward along the feed frame; the centralizer is fixed at the front end of the feed frame and is used to clamp and centralize the laser-mechanical combined drilling tool.

[0023] As a further limitation of the first aspect of the present invention, the position adjustment device includes: an angle adjustment module, a vertical position adjustment mechanism, a base, and a horizontal position adjustment mechanism;

[0024] One end of the angle adjustment module is connected to the feed frame, and the other end is connected to the guide sleeve. The angle adjustment module is used to drive the drill tool carrying device to achieve angle adjustment, so as to achieve relative drilling angle adjustment of the laser mechanical combined drill tool relative to the rock sample;

[0025] A vertical position adjustment mechanism, comprising: a column, a guide sleeve, a bolt hole and a vertical adjustment cylinder;

[0026] The column is connected to the sliding seat, the guide sleeve is sleeved on the column, one end of the guide sleeve is connected to the angle adjustment module, and the vertical loading cylinder is connected to the angle adjustment module. Under the pushing action of the vertical loading cylinder, the guide sleeve can be driven to move vertically along the column;

[0027] When the guide sleeve moves to the specified position, the vertical loading cylinder self-locks, and the bolt holes on the guide sleeve are used for secondary bolt fixing;

[0028] The lateral position adjustment mechanism includes a slide, a sliding seat, a lateral adjustment motor and a lead screw. The base is used to be placed inside the foundation pit so that the test device can be sunk below the foundation plane.

[0029] The slide is fixed on the base, the upper end of the slide is connected to the sliding seat, one side of the sliding seat is connected to the lateral adjustment motor via a lead screw, and the lead screw is driven to rotate under the drive of the lateral adjustment motor, thereby causing the sliding seat to move laterally along the slide;

[0030] The lead screw has a self-locking function. After the sliding seat moves to the specified position, the lead screw is self-locked and fixed.

[0031] As a further limitation of the first aspect of the present invention, a laser-mechanical combined drilling tool comprises: a drill rod;

[0032] Drill pipe, including: first-level outer rod, outer rod reducing section, second-level outer rod, first-level inner rod, inner rod reducing section, second-level inner rod, wear-resistant copper sleeve and support ring;

[0033] The first-level outer rod is connected to the second-level outer rod through the outer rod reducing section, and the first-level inner rod is connected to the second-level inner rod through the inner rod reducing section. The inner diameter of the second-level outer rod is smaller than the inner diameter of the first-level outer rod, and the inner diameter of the second-level inner rod is smaller than the inner diameter of the first-level inner rod. The first-level outer rod is sleeved on the outside of the first-level inner rod, and a wear-resistant copper sleeve is connected between the first-level outer rod and the first-level inner rod. A support ring is provided inside the first-level inner rod.

[0034] As a further limitation of the first aspect of the present invention, the laser-mechanical combined drilling tool further includes: a drill bit;

[0035] The drill bit includes cutting teeth, reinforcing teeth, water outlet holes and light outlet holes. The drill bit is a multi-wing PDC composite drill bit structure. The cutting teeth of each wing are arranged in a streamlined pattern, and the rear row of the cutting teeth of each wing is arranged with reinforcing teeth.

[0036] Water outlet holes are set between adjacent wings of the drill bit, laser light outlet holes are set at positions deviated from the center of the drill bit, and cutting teeth are arranged at the center of the drill bit.

[0037] As a further limitation of the first aspect of the present invention, the laser-mechanical combined drilling tool further includes: an inner rod fine-tuning mechanism;

[0038] The inner rod fine-tuning mechanism includes a servo motor, a synchronous pulley, and an absolute encoder. The secondary inner rod is connected to the servo motor via a synchronous pulley. The absolute encoder is installed on the synchronous belt and is used to record the rotation angle of the secondary inner rod in real time to adjust the rotation angle of the laser head and align the laser beam with the light outlet hole of the drill bit.

[0039] As a further limitation of the first aspect of the present invention, the laser-mechanical combined drilling tool further includes: a laser head assembly;

[0040] Laser head assembly, including: laser head protection device;

[0041] Laser head protection device, including: laser head protection shell, sapphire lens, openable baffle, cylinder and cylinder push rod;

[0042] The laser head is fixed in the laser head protective shell, and the sapphire lens is installed on the outside of the laser head as the first level of protection. An openable and closable baffle is installed on the outside of the sapphire lens. The openable and closable baffle is opened and closed by the cylinder driving the cylinder push rod to move back and forth. The openable and closable baffle constitutes the second line of protection.

[0043] As a further limitation of the first aspect of the present invention, the laser head protection device further includes: a liquid cleaning module and a gas cleaning module;

[0044] Liquid cleaning module, including: cleaning water nozzle, cleaning water pipe, water tank pump;

[0045] The water tank pump is used to contain and pressurize the liquid. One end of the cleaning water pipe is connected to the water pump. The cleaning water pipe is installed in the secondary inner rod and the inner rod reducing section. The other end of the cleaning water pipe is connected to the cleaning water nozzle through a support ring. The spray direction of the cleaning water nozzle is toward the laser head.

[0046] Gas cleaning module, including: cleaning gas nozzle, cleaning gas pipe and air pump;

[0047] The air pump is used to generate and pressurize gas. One end of the cleaning air pipe is connected to the air pump. The cleaning air pipe is installed in the secondary inner rod and the reducing section of the inner rod. The other end of the cleaning air pipe is connected to the cleaning gas nozzle through a support ring. The spray direction of the cleaning gas nozzle is toward the laser head.

[0048] As a further limitation of the first aspect of the present invention, the laser head protection device further includes: a sealing module;

[0049] The sealing module is placed outside the sapphire lens and is used to seal the laser head protection mechanism.

[0050] As a further limitation of the first aspect of the present invention, it further includes: a slag discharge liquid pipeline;

[0051] Slag discharge liquid pipeline, including: water pump water tank, slag discharge water pipe and water outlet;

[0052] One end of the slag discharge water pipe is connected to the water pump water tank. The slag discharge water pipe is placed in the secondary inner rod and the inner rod reducing section. It is transmitted to the outside of the laser head protective cover through the support ring and then connected to the water outlet, so that the liquid is discharged through the water outlet and returns from the outside of the first-stage outer rod with rock slag and cuttings.

[0053] A second aspect of the present invention provides a simulation test method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform.

[0054] A simulation test method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform includes the following steps:

[0055] The openable and closable baffle is closed, the laser head is in a closed protection state, the drive device drives the drill rod, and drives the drill bit to mechanically cut and drill the rock. The slag discharge pipe is connected to the slag discharge fluid for slag discharge. After drilling to the designated position, the drive device stops working, the laser mechanical combined drilling tool stops rotating, the water pump is turned off, and the slag discharge fluid is stopped.

[0056] Open the retractable shutter and clean the sapphire lens through the cleaning water nozzle to flush away the dust attached to the sapphire lens. Then turn off the water pump and stop the cleaning water nozzle from flushing. Turn on the air pump and blow away the water droplets on the sapphire lens through the cleaning air nozzle. Then turn on the laser and conduct the laser rock breaking test.

[0057] The above process was repeated to realize the laser-mechanical combined drilling and rock breaking test.

[0058] As a further limitation of the second aspect of the present invention, the rock sample is hoisted onto the sample base and moved into the confining pressure loading rock box through the sample adjustment device. When the laser mechanical combined drilling tool conducts a drilling and rock breaking test, a specified confining pressure is applied to the rock sample through the confining pressure loading mechanism to simulate the ground stress conditions at different burial depths.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] 1. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. Through a displacement adjustment device, it realizes all-round and multi-angle continuous drilling, and can more realistically simulate the drilling state and drilling posture of a geological drill.

[0061] 2. The present invention innovatively proposes a laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test and method, which simulates the real ground stress environment through the confining pressure loading device. It can not only realistically simulate the rock-breaking ground stress environment, but also be used for the positioning and fixation of rock samples.

[0062] 3. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. By offsetting the laser, the rock-breaking area of the light spot is increased, thereby improving the combined rock-breaking efficiency.

[0063] 4. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform, and solves the design difficulties of laser-mechanical integrated mounting through a multi-tube-in-tube structure.

[0064] 5. This invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. By optimizing the pipeline layout in the drill pipe, it solves the problems of laser energy transmission and laser head cleaning and protection.

[0065] 6. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. A protective cover with a sapphire lens is installed on the outside of the laser head, and a retractable baffle is installed on the outside of the sapphire lens. When laser irradiation is started, the retractable baffle opens, and then the laser head emits a laser beam. After the laser irradiation is completed, the retractable baffle closes to prevent the laser head from being damaged by splashing rock debris in front when the drill bit drills into the rock, thus realizing two-level protection for the laser head.

[0066] 7. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. After the drill bit breaks the rock, high-pressure water is first used to flush the dust on the sapphire lens, and then high-pressure air is used to blow away the water stains on the lens, ensuring that the lens is dry and clean, avoiding affecting the optical path transmission and burning the lens.

[0067] 8. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. The laser head is arranged inside the inner rod, and the tail end of the inner rod is connected to a servo motor and an absolute encoder. When the outer rod drives the drill bit to rotate and break the rock, the inner rod does not move. After the rock breaking stops, the inner rod relies on the absolute encoder to find the position of the drill bit's light outlet, ensuring the smooth emission of the laser and realizing multi-point laser irradiation of the rock sample.

[0068] 9. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. The straightening device is arranged at the front end of the drilling tool carrying platform to clamp the laser-mechanical combined drilling tool, thereby reducing the radial vibration generated by the laser-mechanical combined drilling tool during drilling and rock-breaking, and improving the drilling accuracy.

[0069] 10. The present invention innovatively proposes a laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test and method. The base and position adjustment device are both located inside the foundation pit, and the bottom end of the confining pressure application module is placed on the surface of the foundation pit, so that the sample can be placed on the foundation plane during the test, reducing the risks brought by the lifting of large samples.

[0070] 11. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. The first-level outer rod is connected to the second-level outer rod through an outer rod reducing section, thereby reducing the diameter of the first-level outer rod; the first-level inner rod is connected to the second-level inner rod through an inner rod reducing section, thereby reducing the diameter of the first-level inner rod. The reduction in the drill rod diameter increases the distance between the hole wall and the outer wall of the drill rod, which is beneficial for slag discharge, and also reduces costs.

[0071] 12. The present invention innovatively proposes a simulation test and method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform. The drill bit adopts a multi-wing PDC composite drill bit structure. The cutting teeth of each wing adopt a streamlined tooth layout, and reinforced teeth are arranged in the rear row to improve the stress of the drill teeth. Multiple water outlets are set between the wings of the drill bit to ensure that there is a sufficient flow of slag discharge liquid. A laser light outlet is set at a position deviated from the center of the drill bit, and cutting teeth are arranged in the center of the drill bit to ensure that the central rock column can be smoothly removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0073] Figure 1 A schematic diagram of the three-dimensional structure of a laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system provided in Example 1 of the present invention;

[0074] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the confining pressure loading device shown;

[0075] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the position adjustment device shown;

[0076] Figure 4 for Figure 1 A cross-sectional view of the laser-mechanical combined drilling tool is shown;

[0077] Figure 5 for Figure 4 Schematic diagram of the drill bit structure shown;

[0078] Figure 6 for Figure 4 Schematic diagram of the laser head protection device structure shown;

[0079] Figure 7 for Figure 4 The schematic diagram of the sealing structure of the secondary inner rod tail end plug is shown;

[0080] Figure 8 for Figure 1 A schematic diagram of the three-dimensional structure of the driving device shown;

[0081] in,

[0082] 1. Foundation;

[0083] 2. Confining pressure loading device; 21. Rock sample; 22. Sample base; 23. Sample adjustment device; 24. Confining pressure loading rock box; 25. Confining pressure loading cylinder;

[0084] 3. Position adjustment device; 31. Horizontal position adjustment mechanism; 311. T-slot; 312. Sliding seat; 313. Horizontal adjustment motor; 314. Lead screw; 32. Vertical position adjustment mechanism; 321. Column; 322. Guide sleeve; 323. Bolt hole; 324. Vertical adjustment cylinder; 33. Angle adjustment module;

[0085] 4. Laser-mechanical combined drilling tool; 41. Drill bit; 411. Cutting teeth; 412. Reinforced teeth; 413. Water outlet; 414. Light outlet; 42. Drill rod; 421. First-stage outer rod; 422. Outer rod reducing section; 423. Second-stage outer rod; 424. First-stage inner rod; 425. Inner rod reducing section; 426. Second-stage inner rod; 427. Wear-resistant copper sleeve; 428. Support ring; 43. Laser head assembly; 431. Laser head; 432. Laser head protective shell; 433. Sapphire lens; 434. Openable and closable stop 435, cylinder air pipe; 436, cylinder; 437, cylinder push rod; 438, cleaning water nozzle; 439, cleaning air nozzle; 44, inner rod fine adjustment mechanism; 441, servo motor; 442, synchronous pulley; 443, absolute encoder; 45, plug structure; 451, slag discharge water pipe; 452, laser head cooling water pipe; 453, laser fiber; 454, high-pressure air pipe; 455, cleaning water pipe; 456, cleaning air pipe; 461, air pump; 462, laser; 463, water tank pump;

[0086] 5. Drive device; 51. Rotary loading module; 511. Hydraulic motor; 512. Reducer; 513. Drill rod clamping mechanism; 514. Power head base; 52. Thrust loading cylinder;

[0087] 6. Drilling tool carrying device; 61. Feed rack; 62. Centralizer;

[0088] 61. Slag discharge water pipe; 62. Slag discharge channel;

[0089] 7. Oil source pump station; 71. Pump station; 72. Oil cooling box;

[0090] 8. Base;

[0091] 9. Foundation pit;

[0092] 10. Control cabinet. DETAILED DESCRIPTION

[0093] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0094] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0095] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0096] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0097] Example 1:

[0098] Embodiment 1 of the present invention provides a laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system, comprising:

[0099] Foundation 1;

[0100] The confining pressure loading device 2 is used for positioning, mounting, clamping and confining pressure loading of the rock sample 21;

[0101] Driving device 5;

[0102] The laser-mechanical combined drilling tool 4 is connected to the drill rod clamping mechanism 513 of the driving device 5;

[0103] A drilling tool carrying device 6, which is used to carry the laser-mechanical combined drilling tool 4 and the driving device 5;

[0104] The position adjustment device 3 and the drill tool carrying device 6 are connected to the position adjustment device 3. The position adjustment device 3 can adjust the spatial position of the drill tool carrying device 6, thereby adjusting the relative position between the laser mechanical combined drilling tool 4 and the rock sample 21, and changing the drilling angle of the laser mechanical combined drilling tool 4.

[0105] In this embodiment, the position adjustment device 3 can adjust the drill tool carrying device 6 to any position and any angle in space, thereby realizing all-round and multi-angle drilling of the laser-mechanical combined drill tool 4 to simulate the drilling state and drilling posture of the engineering drill in actual drilling.

[0106] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the confining pressure loading device 2 includes a rock sample 21, a sample base 22, a sample adjustment device 23, a confining pressure loading rock box and a confining pressure loading cylinder 25;

[0107] After the rock sample 21 is hoisted onto the sample base 22, it is pushed to the designated position of the confining pressure loading rock box 24 by the sample adjustment device 23. The confining pressure loading cylinder 25 clamps and fixes the rock sample 21 to ensure that the rock sample 21 does not move during the drilling test, which would affect the drilling accuracy.

[0108] At the same time, the pressure value of the confining pressure loading cylinder 25 is adjustable, which can realize loading of different confining pressure levels and conduct combined drilling and rock breaking tests under confining pressure conditions.

[0109] In some embodiments of the present invention, Figure 1 and Figure 8 As shown, the driving device 5 includes a rotary loading module 51, and the rotary loading module 51 includes a hydraulic motor 511, a reduction gearbox 512, a drill rod clamping device 513 and a power head base 514;

[0110] The laser-mechanical combined drilling tool 4 is clamped and held tightly by the drill rod clamping device 513. The rotational power provided by the hydraulic motor 511 is transmitted to the laser-mechanical combined drilling tool 4 through the reduction gear box 512 and the drill rod clamping device 513, thereby realizing the rotational cutting and rock breaking of the laser-mechanical combined drilling tool 4. The reduction gear box 512 and the drill rod clamping device 513 are connected to the power head base 514.

[0111] In some embodiments of the present invention, Figure 1 and Figure 8 As shown, the driving device 5 includes a thrust loading cylinder 52, one end of which is fixed on the drilling tool carrying device 6, and the other end of the thrust loading cylinder 52 is connected to the power head base 514. The thrust loading cylinder 52 applies thrust to the power head base 514, pushing the power head base 514 to feed, thereby driving the laser mechanical combined drilling tool 4 to advance and break the rock.

[0112] In some embodiments of the present invention, Figure 4 As shown, the drill rod 42 includes a first-level outer rod 421, an outer rod reducing section 422, a second-level outer rod 423, a first-level inner rod 424, an inner rod reducing section 425, a second-level inner rod 426, a wear-resistant copper sleeve 427 and a support ring 428;

[0113] The drill rod 42 adopts a "multi-tube within a tube" structure. The first-level outer rod 421 is used to transmit thrust and torque, and the first-level inner rod 424 is used to fix the laser head protective cover 432. A wear-resistant copper sleeve 427 is placed between the first-level outer rod 421 and the first-level inner rod 424, solving the problem of separating the dynamic and static of the inner and outer rods.

[0114] The drill rod 42 adopts a multi-stage diameter reduction. The first-level outer rod 421 is connected to the second-level outer rod 423 through the outer rod diameter reducing section 422 to reduce the diameter of the first-level outer rod 421; the first-level inner rod 424 is connected to the second-level inner rod 426 through the inner rod diameter reducing section 425 to reduce the diameter of the first-level inner rod 424. The reduction in the diameter of the drill rod 42 increases the distance between the hole wall and the outer wall of the drill rod, which is beneficial to slag discharge, and can also reduce costs.

[0115] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the drill bit 41 includes cutting teeth 411, reinforcement teeth 412, water outlet holes 413 and light outlet holes 414. The drill bit 41 adopts a multi-wing PDC composite drill bit structure. The cutting teeth 411 of each wing adopt a streamlined tooth arrangement form, and reinforcement teeth 412 are arranged in the rear row to improve the stress of the drill teeth.

[0116] A plurality of water outlet holes 413 are provided between the wings of the drill bit 41 to ensure that there is sufficient flow of slag removal liquid. A laser light outlet hole 414 is provided at a position deviated from the center of the drill bit 41. A cutting tooth 411 is arranged in the center of the drill bit 41 to ensure that the central rock column can be removed smoothly.

[0117] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the laser head protective cover 432 is fixed on the first-level inner rod 424, and the light outlet 414 is offset from the center of the drill bit 41. The cutting teeth 411 are arranged in the center of the drill bit 41. At the same time, the center cutting teeth 411 can cut off the center rock column, ensuring continuous drilling of the drilling rig.

[0118] In some embodiments of the present invention, Figure 4 As shown, this test platform adopts a step-by-step rock breaking method. The laser first irradiates the rock sample 21, and the drill bit 41 is cutting and breaking the rock. When the first-level outer rod 421 drives the drill bit 41 to break the rock, the first-level inner rod 424 is fixed. When the first-level outer rod 421 and the drill bit 41 stop rotating, the first-level inner rod 424 needs to drive the laser head 431 to align with the light outlet 414 of the drill bit 41 to ensure that the high-energy laser can be smoothly emitted to the rock sample 21 for laser rock breaking. At this time, the inner rod fine-tuning mechanism 44 is required to adjust the rotation angle of the inner rod to ensure that the laser can be emitted from the light outlet 414 of the drill bit 41.

[0119] In some embodiments of the present invention, Figure 4 and Figure 8As shown, the inner rod fine-tuning mechanism 44 includes a servo motor 441, a synchronous pulley 442 and an absolute encoder 443. The secondary inner rod 426 is connected to the servo motor 441 through the synchronous pulley 442. The absolute encoder 443 is installed on the synchronous belt 442, which can record the rotation angle of the secondary inner rod 426 in real time, and finally achieve precise adjustment of the rotation angle of the laser head 431, so that the laser beam is aligned with the light outlet hole 414 of the drill bit 41. The primary outer rod 421 and the primary inner rod 424 cooperate to realize multi-point laser irradiation of the rock sample 21.

[0120] In some embodiments of the present invention, Figure 4 and Figure 6 As shown, reference numeral 43 is a laser head assembly, reference numeral 431 is a laser head, and a laser head protection device includes a laser head protection shell 432, a sapphire lens 433, an openable baffle 434, a cylinder 436 and a cylinder push rod 437;

[0121] The laser head 431 is fixed in the laser head protective shell 432 by bolts. The sapphire lens 433 is installed on the outside of the laser head 431 as the first level of protection. In particular, the sapphire lens 433 has high strength and wear resistance, and can effectively resist rock debris and cuttings during the drilling and breaking process.

[0122] An openable baffle 434 is installed on the outside of the sapphire lens 433. The openable baffle 434 is driven by a cylinder 436 to drive a cylinder push rod 437 to reciprocate to achieve the opening and closing action, thereby preventing rock debris from entering the laser head protective shell 432 and damaging the lens group, forming a second line of protection.

[0123] The opening and closing of the retractable baffle 434 in the laser head protection device needs to be controlled according to the rock breaking state. When the drill bit 41 is breaking the rock, the cylinder push rod 437 drives the retractable baffle 434 to close. At this time, the rock debris and dust generated by the drill bit 41 breaking the rock cannot enter the laser head protective shell 432, thereby protecting the laser head 431; when the drill bit 41 stops working and starts laser rock breaking, the cylinder push rod 437 drives the retractable baffle 434 to open, so that the laser can pass smoothly through the light outlet hole 414 of the drill bit 41.

[0124] In some embodiments of the present invention, dust is easily adsorbed onto the lens assembly during the recycling process of the sapphire lens 433, resulting in an accident in which the sapphire lens 433 is burned by the laser. Therefore, the present invention adds a cleaning and sealing mechanism for the sapphire lens 433, which mainly consists of a liquid cleaning module, a gas cleaning module and a sealing module.

[0125] In some embodiments of the present invention, Figure 6 and Figure 7 As shown, the liquid cleaning module mainly includes a cleaning water nozzle 438, a cleaning water pipe 455 and a water tank pump 464;

[0126] The water tank pump 464 is used to contain and pressurize the liquid. The cleaning water pipe 455 is installed in the secondary inner rod 426 and the inner rod reducing section 425, and is connected to the cleaning water nozzle 438 through the support ring 428;

[0127] Furthermore, the spraying direction of the cleaning water nozzle 438 is toward the laser head 431, so that the liquid sprayed by the cleaning water nozzle 438 is sprayed toward the laser head 431 in a targeted manner, thereby improving the cleaning effect.

[0128] In some embodiments of the present invention, Figure 6 and Figure 7 As shown, the gas cleaning module mainly includes a cleaning gas nozzle 439, a cleaning gas pipe 456 and an air pump 461. The air pump 461 is used to generate and pressurize gas. The cleaning gas pipe 456 is installed in the secondary inner rod 426 and the inner rod reducing section 425, and is connected to the cleaning gas nozzle 439 through a support ring 428.

[0129] Furthermore, the spraying direction of the cleaning gas nozzle 439 is toward the laser head 431, so that the gas sprayed through the cleaning gas nozzle 439 is sprayed toward the laser head 431 in a targeted manner, thereby improving the cleaning effect.

[0130] In some embodiments of the present invention, the sapphire lens 433 is first cleaned with liquid sprayed from the cleaning water nozzle 438 to remove dust and impurities on the sapphire lens 433, and then the sapphire lens 433 is cleaned with gas sprayed from the cleaning gas nozzle 439 to remove water stains adsorbed on the sapphire lens 433.

[0131] The sealing module is placed outside the sapphire lens to seal the laser head protection device.

[0132] In some embodiments of the present invention, Figure 4 and Figure 7 As shown, the laser pipeline arrangement consists of a laser 462, a laser fiber 453 and a laser head 431. The laser 462 generates high-energy laser and is transmitted by the laser fiber 453. The laser fiber 453 is placed in the secondary inner rod 426 and the inner rod reducing section 425, and is connected to the laser head 431 through the support ring 428.

[0133] In some embodiments of the present invention, Figure 4 and Figure 7 As shown, the air pipeline includes an air pump 461, a high-pressure air pipe 454 and a cylinder air pipe 435. The air pump 461 generates high-pressure gas, which is transmitted by the high-pressure air pipe 454. The high-pressure air pipe 454 is placed in the secondary inner rod 426 and the inner rod reducing section 425, and is connected to the cylinder air pipe 435 through the support ring 428. The high-pressure gas output by the cylinder air pipe 435 drives the cylinder 436 to reciprocate.

[0134] In some embodiments of the present invention, Figure 4 and Figure 7 As shown, the slag discharge liquid pipeline includes a water pump tank 463, a slag discharge water pipe 451 and a water outlet 413. The water pump tank 463 is used to contain and pressurize the liquid. The pressurized liquid is transmitted to the slag discharge water pipe 451. The slag discharge water pipe 451 is placed in the secondary inner rod 426 and the inner rod reducing section 425, and is transmitted to the outside of the laser head protective cover through the support ring 428. Finally, it is output through the water outlet 413 and returns from the outside of the primary outer rod 421 with rock slag and cuttings, realizing the cyclic slag discharge function.

[0135] Furthermore, a plug structure 45 is provided at the tail end of the secondary inner rod 426 to create a sealed environment to prevent the drilling fluid from depressurizing.

[0136] In some embodiments of the present invention, Figure 1 and Figure 8 As shown, the drilling tool carrying device 6 includes a feed frame 61 and a stabilizer 62. The power head base 514 is slidably connected to the feed frame 61, driving the laser-mechanical combined drilling tool 4 to feed forward and retreat backward along the feed frame 61; the stabilizer 62 is placed at the front end of the feed frame 61, clamping and straightening the laser-mechanical combined drilling tool 4, reducing the cantilever length of the laser-mechanical combined drilling tool 4 during drilling, and ensuring the drilling accuracy and drilling stability of the laser-mechanical combined drilling tool 4.

[0137] In some embodiments of the present invention, Figure 1 、 Figure 3 and Figure 8 As shown, the position adjustment device 3 includes an angle adjustment module 33, one end of the angle adjustment module 33 is connected to the feed frame 61, and the other end is connected to the guide sleeve 322. The angle adjustment module 33 can drive the drilling tool carrying platform 6 to achieve angle adjustment, thereby achieving the relative drilling angle adjustment of the laser mechanical combined drilling tool 4 relative to the rock sample 21.

[0138] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the position adjustment device 3 includes a vertical position adjustment mechanism 32, which consists of a column 321, a guide sleeve 322, bolt holes 323, and a vertical adjustment cylinder 324. The two columns 321 are connected to the sliding seat 312. The guide sleeve 322 is sleeved on the columns 321, with one end connected to the angle adjustment module 33. The vertical loading cylinder 324 is connected to the angle adjustment module 33. The vertical loading cylinder 324 drives the guide sleeve 322 to move vertically along the column 321. When it moves to the specified position, it can self-lock. To ensure stability during the drilling test, the bolt holes 323 on the guide sleeve 322 can be used for secondary bolt fixing.

[0139] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the position adjustment device 3 includes a base 8 and a lateral position adjustment mechanism 31 , and the lateral position adjustment mechanism 31 includes a T-slot 311 , a sliding seat 312 , a lateral adjustment motor 313 and a lead screw 314 ;

[0140] The base 8 is placed inside the foundation pit 9, so that the test device sinks below the plane of the foundation 1, reducing the hoisting height of the rock sample 21 and reducing the hoisting risk. The T-slot 311 is set on the base 8, and the upper end is connected to the sliding seat 312. One side of the sliding seat 312 is connected to the lateral adjustment motor 313 and the screw 314. Under the drive of the lateral adjustment motor 313, the screw 314 is driven to rotate, thereby realizing the lateral movement of the sliding seat 312 along the T-slot 311. The screw 314 has a self-locking function, and can achieve self-locking fixation after the sliding seat 312 moves to the specified position.

[0141] In some embodiments of the present invention, Figure 1 As shown, the oil source pump station 7 includes a pump station 71 and an oil cooler 72. The pump station 71 provides driving force for the driving device 5, and the oil cooler 72 cools the pump station 71 to ensure stable operation of the pump station 71.

[0142] In some embodiments of the present invention, Figure 1 As shown, the laser-mechanical combined efficient drilling and rock-breaking platform simulation test system includes a control cabinet 10. Each channel of the control cabinet 10 has force closed-loop, displacement closed-loop, angle, and speed closed-loop control functions. At the same time, it collects and processes multiple signals of the system, and can realize unified and coordinated control of the confining pressure loading device 2, position adjustment device 3, and drive device 5 of the laser-mechanical combined efficient drilling and rock-breaking platform simulation test system.

[0143] Example 2:

[0144] Embodiment 2 of the present invention provides a simulation test method for a laser-mechanical combined high-efficiency drilling and rock-breaking platform, using the simulation test system for the laser-mechanical combined high-efficiency drilling and rock-breaking platform described in embodiment 1, including:

[0145] (1) The retractable baffle 434 in the laser-mechanical combined drilling tool 4 is closed, and the laser head 43 is in a closed protection state, and no laser irradiation is performed; at this time, the drill rod 42 is driven by the driving device 5, driving the drill bit 41 to perform mechanical cutting and drilling to break the rock, and the slag discharge water pipe 451 is passed through the slag discharge liquid to discharge the slag, thereby realizing a pure mechanical drilling and rock breaking test.

[0146] (2) The driving device 5 is in a stopped state, the air pump 461 introduces high-pressure gas, which enters the cylinder 436 through the high-pressure gas pipe 435, pushing the cylinder push rod 437 to open the openable and closable baffle 434; only the laser 462 is turned on to perform the laser rock breaking test.

[0147] More specifically, they include:

[0148] First, the closable baffle 434 is closed, and the laser head 43 is in a closed protection state. The driving device 5 drives the drill rod 42, driving the drill bit 41 to mechanically cut and drill the rock, and the slag discharge pipe 451 is fed with slag discharge fluid for slag discharge. After drilling to the designated position, the driving device 5 stops working, the laser mechanical drilling tool 4 stops rotating, the water pump 463 is turned off, and the slag discharge fluid is stopped.

[0149] The air pump 461 is turned on to introduce high-pressure gas, which enters the air cylinder 436 through the high-pressure air pipe 435, pushing the cylinder push rod 437 to open the openable and closable baffle 434. The sapphire lens 433 is cleaned through the cleaning water nozzle 438 to flush away dust attached to the sapphire lens 433. The water pump is then turned off, the cleaning water nozzle 438 stops flushing, and the air pump 431 is turned on to blow away water droplets on the sapphire lens 433 through the cleaning air nozzle 439 to ensure that the sapphire lens 433 is in a clean and dry state.

[0150] Then, the laser 462 is turned on to perform a laser rock breaking test; the above steps are repeated to finally achieve a laser-mechanical combined drilling and rock breaking test.

[0151] During the rock breaking test, confining pressure can be applied to simulate the actual drilling stress environment, including:

[0152] The rock sample 21 is hoisted onto the sample base 22 and moved into the confining pressure loading rock box 24 through the sample adjustment device 23. When the laser mechanical combined drilling tool 4 performs a drilling and rock breaking test, a specified confining pressure is applied to the rock sample 21 through the confining pressure loading cylinder 25 to simulate the ground stress conditions at different burial depths.

[0153] In order to verify the superiority and engineering practicality of laser-assisted mechanical drilling, the above-mentioned laser-mechanical combined drilling rock breaking test method can be compared with the rock breaking test method using only mechanical drilling tools, including:

[0154] (1) Rock breaking tests were conducted at constant torque and thrust, comparing the rock breaking rate of laser-mechanical combined drilling with that of mechanical drilling tools alone to study the superiority of the combined drilling speed.

[0155] Oil pressure sensors are arranged in the hydraulic motor 511 and the thrust loading cylinder 52, and a displacement sensor is arranged between the power head base 514 and the stabilizer 62 to monitor the displacement change, thrust and torque during the drilling process of the drilling rig in real time. A constant propulsion force applied to the laser-mechanical combined drilling tool 4 is set by the thrust loading cylinder 52, and a constant torque is set by the rotary loading module 51; the laser 462 is turned on, and a laser-mechanical combined drilling test is carried out in conjunction with the drill bit 41 to obtain the drilling rate under the combined drilling test; the laser 462 is turned off, and a mechanical drilling test is carried out only through the drill bit 41 to obtain the drilling rate under the mechanical drilling test; the difference in drilling rate under the two drilling modes is compared to study the superiority of combined drilling with laser assistance.

[0156] (2) Rock breaking tests were conducted at a constant rotational speed and propulsion speed to compare the differences in thrust and torque required for rock breaking using laser-mechanical combined drilling and drilling using only mechanical drilling tools, in order to study the engineering practicality of combined drilling:

[0157] The thrust loading cylinder 52 and the rotary loading module 51 are used to set a constant rotation speed and propulsion speed of the drill bit 41, and to control the opening and closing of the laser 462, so as to realize the laser-mechanical combined drilling test and the mechanical drilling tool drilling test; an oil pressure sensor is arranged in the hydraulic motor 511 and the thrust loading cylinder 52 of the rotary loading module 51, and a displacement sensor is arranged between the power head base 514 and the stabilizer 62 to monitor the displacement change, thrust and torque during the drilling process of the drilling rig in real time, compare the rock-breaking thrust and torque required for laser-mechanical combined drilling with that for mechanical drilling using only the drill bit 41, and study the engineering practicality of combined drilling with laser assistance.

[0158] In the above-mentioned test method, different models of laser heads 43 can be replaced to change the energy distribution form of the laser, the relative position of the laser head 43 and the drill bit 41 can be changed to adjust the spot diameter, the type of laser 462 can be switched to realize continuous laser and pulsed laser conversion, the laser 462 can be adjusted to set different laser rock breaking parameters, and the material, structure, size and other parameters of the drill bit 41 and drill rod in the laser-mechanical combined drilling tool 4 can be replaced to increase the diversity of drilling and rock breaking tests.

[0159] The laser-mechanical combined drilling tool 4 and the driving device 5 in this embodiment both adopt a modular design. Different laser-mechanical combined drilling tools 4 and driving devices 5 can be replaced to realize laser-mechanical combined drilling and rock breaking tests of different models and parameter ranges; in addition, the structural design of the laser-mechanical combined drilling tool 4 is continuously optimized through experiments, providing a test device basis for the functional testing of the laser-mechanical combined drilling tool 4.

[0160] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system, characterized by: include: Confining pressure loading device for positioning, clamping and confining pressure loading of specimens; A laser-mechanical combined drilling tool for performing laser-mechanical combined drilling, the laser-mechanical combined drilling tool comprising: a drill rod; Drill pipe, including: first-level outer rod, outer rod reducing section, second-level outer rod, first-level inner rod, inner rod reducing section, second-level inner rod, wear-resistant copper sleeve and support ring; The first-level outer rod is connected to the second-level outer rod through the outer rod reducing section, and the first-level inner rod is connected to the second-level inner rod through the inner rod reducing section. The inner diameter of the second-level outer rod is smaller than that of the first-level outer rod, and the inner diameter of the second-level inner rod is smaller than that of the first-level inner rod. The first-level outer rod is sleeved on the outside of the first-level inner rod. A wear-resistant copper sleeve is connected between the first-level outer rod and the first-level inner rod. A support ring is provided inside the first-level inner rod. A driving device for driving the laser combined drilling tool to perform combined drilling; A drilling tool carrying device for carrying a laser-mechanical combined drilling tool and a driving device; A position adjustment device is used to connect the drilling tool carrying device and adjust the relative position between the laser-mechanical combined drilling tool and the sample to change the drilling angle of the laser-mechanical combined drilling tool.

2. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1 is characterized in that: The confining pressure loading device includes: a sample base, a sample adjustment device, a confining pressure loading rock box and a confining pressure loading mechanism; The sample base is used to carry the sample, the sample adjustment device is used to push the sample to the specified position of the confining pressure loading rock box, and the confining pressure loading mechanism is used to clamp and fix the rock sample and apply pressure to the rock sample.

3. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1 is characterized in that: The driving device includes: a rotary loading module and a thrust loading mechanism; The rotary loading module includes a hydraulic motor, a reduction gear box, a drill rod clamping device, and a power head base. The drill rod clamping device is used to connect to the laser mechanical combined drilling tool. The hydraulic motor is connected to the drill rod clamping device via the reduction gear box. The reduction gear box and the drill rod clamping device are both connected to the power head base. One end of the thrust loading mechanism is connected to the drilling tool carrying device, and the other end of the thrust loading mechanism is connected to the power head base. The thrust loading mechanism is used to apply thrust to the power head base to push the power head base forward, thereby driving the laser mechanical combined drilling tool to advance and break the rock; The drilling tool carrying device includes: a feed frame and a centralizer; The power head base is slidably connected to the feed frame and is used to drive the laser-mechanical combined drilling tool to feed forward and retreat backward along the feed frame; the centralizer is fixed at the front end of the feed frame and is used to clamp and centralize the laser-mechanical combined drilling tool.

4. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1 is characterized in that: The position adjustment device comprises: an angle adjustment module, a vertical position adjustment mechanism, a base and a horizontal position adjustment mechanism; One end of the angle adjustment module is connected to the feed frame, and the other end is connected to the guide sleeve. The angle adjustment module is used to drive the drill tool carrying device to achieve angle adjustment, so as to achieve relative drilling angle adjustment of the laser mechanical combined drill tool relative to the rock sample; A vertical position adjustment mechanism, comprising: a column, a guide sleeve, a bolt hole and a vertical adjustment cylinder; The column is connected to the sliding seat, the guide sleeve is sleeved on the column, one end of the guide sleeve is connected to the angle adjustment module, and the vertical loading cylinder is connected to the angle adjustment module. Under the pushing action of the vertical loading cylinder, the guide sleeve can be driven to move vertically along the column; When the guide sleeve moves to the specified position, the vertical loading cylinder self-locks, and the bolt holes on the guide sleeve are used for secondary bolt fixing; The lateral position adjustment mechanism includes a slide, a sliding seat, a lateral adjustment motor and a lead screw. The base is used to be placed inside the foundation pit so that the test device can be sunk below the foundation plane. The slide is fixed on the base, the upper end of the slide is connected to the sliding seat, one side of the sliding seat is connected to the lateral adjustment motor via a lead screw, and the lead screw is driven to rotate under the drive of the lateral adjustment motor, thereby causing the sliding seat to move laterally along the slide; The lead screw has a self-locking function. After the sliding seat moves to the specified position, the lead screw is self-locked and fixed.

5. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1 is characterized in that: The laser-mechanical combined drilling tool also includes: a drill bit; The drill bit includes cutting teeth, reinforcing teeth, water outlet holes and light outlet holes. The drill bit is a multi-wing PDC composite drill bit structure. The cutting teeth of each wing are arranged in a streamlined pattern, and the rear row of the cutting teeth of each wing is arranged with reinforcing teeth. Water outlet holes are set between adjacent wings of the drill bit, laser light outlet holes are set at positions deviated from the center of the drill bit, and cutting teeth are arranged at the center of the drill bit.

6. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1 is characterized in that: The laser-mechanical combined drilling tool also includes: an inner rod fine-tuning mechanism; The inner rod fine-tuning mechanism includes a servo motor, a synchronous pulley, and an absolute encoder. The secondary inner rod is connected to the servo motor via a synchronous pulley. The absolute encoder is installed on the synchronous belt and is used to record the rotation angle of the secondary inner rod in real time to adjust the rotation angle of the laser head and align the laser beam with the light outlet hole of the drill bit.

7. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1 is characterized in that: The laser-mechanical combined drilling tool also includes: a laser head assembly; Laser head assembly, including: laser head protection device; Laser head protection device, including: laser head protection shell, sapphire lens, openable baffle, cylinder and cylinder push rod; The laser head is fixed in the laser head protective shell, and the sapphire lens is installed on the outside of the laser head as the first level of protection. An openable and closable baffle is installed on the outside of the sapphire lens. The openable and closable baffle is opened and closed by the cylinder driving the cylinder push rod to move back and forth. The openable and closable baffle constitutes the second line of protection.

8. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 7 is characterized in that: The laser head protection device also includes: a liquid cleaning module and a gas cleaning module; Liquid cleaning module, including: cleaning water nozzle, cleaning water pipe, water tank pump; The water tank pump is used to contain and pressurize the liquid. One end of the cleaning water pipe is connected to the water pump. The cleaning water pipe is installed in the secondary inner rod and the inner rod reducing section. The other end of the cleaning water pipe is connected to the cleaning water nozzle through a support ring. The spray direction of the cleaning water nozzle is toward the laser head. Gas cleaning module, including: cleaning gas nozzle, cleaning gas pipe and air pump; The air pump is used to generate and pressurize gas. One end of the cleaning air pipe is connected to the air pump. The cleaning air pipe is installed in the secondary inner rod and the reducing section of the inner rod. The other end of the cleaning air pipe is connected to the cleaning gas nozzle through a support ring. The spray direction of the cleaning gas nozzle is toward the laser head.

9. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 7, characterized in that: The laser head protection device also includes: a sealing module; The sealing module is placed outside the sapphire lens and is used to seal the laser head protection mechanism.

10. The laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 1, characterized in that: Also includes: slag discharge liquid pipeline; Slag discharge liquid pipeline, including: water pump water tank, slag discharge water pipe and water outlet; One end of the slag discharge water pipe is connected to the water pump water tank. The slag discharge water pipe is placed in the secondary inner rod and the inner rod reducing section. It is transmitted to the outside of the laser head protective cover through the support ring and then connected to the water outlet, so that the liquid is discharged through the water outlet and returns from the outside of the first-stage outer rod with rock slag and cuttings.

11. A test method, applied to the laser-mechanical combined high-efficiency drilling and rock-breaking platform simulation test system according to claim 8, characterized in that: The following processes are included: The openable and closable baffle is closed, the laser head is in a closed protection state, the drive device drives the drill rod, and drives the drill bit to mechanically cut and drill the rock. The slag discharge pipe is connected to the slag discharge fluid for slag discharge. After drilling to the designated position, the drive device stops working, the laser mechanical combined drilling tool stops rotating, the water pump is turned off, and the slag discharge fluid is stopped. Open the retractable baffle and clean the sapphire lens through the cleaning water nozzle to flush away the dust attached to the sapphire lens. Then turn off the water pump and stop flushing the cleaning water nozzle. Turn on the air pump and blow away the water droplets on the sapphire lens through the cleaning air nozzle. Then turn on the laser to conduct a laser rock breaking test.

12. The test method according to claim 11, wherein The rock sample is hoisted onto the sample base and moved into the confining pressure loading rock box through the sample adjustment device. When the laser mechanical combined drilling tool conducts a rock breaking test, a specified confining pressure is applied to the rock sample through the confining pressure loading mechanism to simulate the ground stress conditions at different burial depths.

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