Supercritical carbon dioxide jet rock breaker and use method

Abstract

The invention discloses a supercritical carbon dioxide jet rock breaker and a use method, and belongs to the technical field of mining. The device comprises a base, the base is provided with a first lifting device and two sets of second lifting devices, a liftable movable plate is arranged between the first lifting device and the two sets of second lifting devices, and the movable plate is provided with a movable drilling power device and an energy-gathering supercharging device. The problem that the actual pressure is lower than the expected pressure due to pressure relief of injected carbon dioxide caused by rock mass drilling is solved. The rubber sleeve used for blocking the drill hole is arranged on the multifunctional pipeline, leakage of carbon dioxide in the injection process is effectively prevented, it is ensured that enough pressure is used for separating rock mass from ore body, meanwhile, through the design of the multifunctional pipeline and the detachable jet flow end, flexible switching and efficient operation of equipment functions are achieved, and the equipment is suitable for popularization and application. And the safety and the efficiency of mining are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to a supercritical carbon dioxide jet rock breaker and a use method thereof. Background Art

[0002] Continuous mining technology for underground resources refers to a resource mining technology idea that ensures continuous deformation of resources and the surrounding geological environment. This technical idea regards underground resources and the surrounding geological environment as an organic whole. During the development process, technical means are used to ensure that mathematical models including resource geometry and geostress field change continuously in time and space dimensions, thereby creating a scientific engineering environment for avoiding disasters, improving production efficiency and intelligent mining level. Supercritical carbon dioxide is usually used for mining coal mines.

[0003] For example, the invention with patent application number 2024104088833 discloses an ultra-high pressure supercritical carbon dioxide jet rock breaking device, including a carbon dioxide storage and transportation tank, a third air compressor, a skid-mounted fixed part and a drilling rig. The skid-mounted fixed part includes a carbon dioxide pressurization unit and a carbon dioxide energy-gathering pressure release unit. The gas source is provided by an industrial carbon dioxide storage and transportation tank, and the carbon dioxide is injected into the carbon dioxide pressurization unit for storage and pressurization. When the stored carbon dioxide pressure reaches the set value, the pressure is maintained, and the pressurized carbon dioxide is injected into the carbon dioxide energy-gathering pressure release unit for heating to make the carbon dioxide reach a supercritical state and the pressure exceeds 100MPa. Finally, the ultra-high pressure supercritical carbon dioxide is input into the drilling rig to complete the rock breaking. When underground resources are continuously mined, high-pressure carbon dioxide is injected into the rock mass to separate the rock mass from the ore body, thereby achieving the purpose of mining minerals.

[0004] However, when drilling into rock and injecting carbon dioxide into the rock, a large amount of carbon dioxide will leak out from the borehole opening, causing the actual pressure to be lower than the expected pressure, making the effect of mineral excavation less than ideal. Summary of the invention

[0005] The purpose of the present invention is to provide a supercritical carbon dioxide jet rock breaker and a method of use. By arranging a rubber sleeve for sealing the drill hole on the multifunctional pipeline, the leakage of carbon dioxide during the injection process is effectively prevented, ensuring sufficient pressure for the separation of the rock mass and the ore body. At the same time, through the design of the multifunctional pipeline and the detachable jet end head, the flexible switching and efficient operation of the equipment functions are realized, which greatly improves the safety and efficiency of mining and solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A supercritical carbon dioxide jet rock breaker comprises a base, a first lifting device and two sets of second lifting devices are arranged on the base, a movable plate that can be lifted and lowered is arranged between the first lifting device and the two sets of second lifting devices, and a movable drilling power device and an energy-gathering and pressurizing device are arranged on the movable plate;

[0008] The first lifting device is provided with a multifunctional pipe, the multifunctional pipe is provided with a sealing mechanism for sealing the rock mass holes, and the other end of the multifunctional pipe is provided with a detachable jet end and a drill bit;

[0009] The sealing mechanism comprises a fixing platform, which is fixedly connected to the multifunctional pipeline, a rubber sleeve is sleeved on the fixing platform, a fixing pipe is arranged inside the rubber sleeve, and the fixing pipe is clamped on the multifunctional pipeline.

[0010] Preferably, a sliding groove is provided on the fixed tube, a movable block is slidably mounted on the sliding groove, a matching block is provided on the movable block, a spring is mounted on the matching block, the spring is located in the sliding groove, and both ends of the spring are in contact with the movable block and the inner wall of the sliding groove respectively; a plurality of groups of through grooves are provided on the movable block, and the plurality of groups of through grooves are all located in the sliding groove.

[0011] Preferably, the jet end is provided with a first threaded column and a second threaded column at both ends respectively, the first threaded column is inserted into the drill bit and is threadedly connected to the drill bit, and the second threaded column is threadedly connected to one end of the multifunctional pipe; a first fixed groove and several groups of second fixed grooves are opened in the jet end, the first fixed groove is connected to several groups of second fixed grooves, the second fixed groove is connected to the outside, and the first fixed groove is connected to the multifunctional pipe.

[0012] Preferably, a movable first moving block is provided on the first lifting device, and a movable second moving block is provided on the second lifting device. A connecting block is fixedly connected below the first moving block. Both the connecting block and the second moving block are fixedly connected to the movable plate, and a fixing frame is fixedly connected to the movable plate; one end of the multifunctional pipe is clamped on the first moving block.

[0013] Preferably, a horizontal moving device is provided on the fixed frame, a movable third moving block is provided on the horizontal moving device, and the drilling power device and the energy gathering and boosting device are fixedly connected to the third moving block by bolts.

[0014] Preferably, a plurality of groups of storage tanks are provided on the base, and a pipeline is provided on one group of storage tanks, and the pipeline is connected to the input end of the energy focusing and boosting device.

[0015] Preferably, the multifunctional pipeline is communicated with the output end of the energy-gathering and pressurizing device, and the multifunctional pipeline and the output end of the energy-gathering and pressurizing device are detachably connected.

[0016] Preferably, the multifunctional pipeline is connected to the output end of the drilling power device via a coupling, and the multifunctional pipeline is detachably connected to the output end of the drilling power device.

[0017] Preferably, a crawler-type moving device and several groups of hydraulic cylinders are provided below the base, the crawler-type moving device is installed on the bottom surface of the base, the hydraulic cylinders are respectively arranged at the four corners of the bottom surface of the base, and rubber blocks are provided at the telescopic ends of the hydraulic cylinders.

[0018] A method for using a supercritical carbon dioxide jet rock breaker is implemented based on a supercritical carbon dioxide jet rock breaker and includes the following steps:

[0019] Step 1: The rock breaker moves to the designated position through the crawler mobile device, and then starts the hydraulic cylinder to drive the base to rise, so that the crawler mobile device is separated from the ground, and the base is stably supported on the ground;

[0020] Step 2: The staff starts the first lifting device and two sets of second lifting devices at the same time, driving the movable plate to move up and down, so that the multifunctional pipeline moves to a specified height, and when the multifunctional pipeline moves, the multifunctional pipeline and the drilling power device and the energy-gathering and supercharging device are relatively stationary;

[0021] Step 3: firstly, connect the multifunctional pipeline to the output end of the drilling power device through a coupling, then start the drilling power device, drill holes on the ore body and rock mass through the drill bit, stop drilling when the specified depth is reached, and separate the drilling power device from the multifunctional pipeline;

[0022] Step 4: Start the horizontal moving device, which drives the energy-gathering and pressurizing device to move to align with the multifunctional pipeline, then connect the multifunctional pipeline to the output end of the energy-gathering and pressurizing device, start the energy-gathering and pressurizing device, and move the carbon dioxide in the storage tank into the energy-gathering and pressurizing device, which pressurizes the carbon dioxide to a supercritical state;

[0023] Step 5: Input the supercritical carbon dioxide into the multifunctional pipeline. The carbon dioxide first passes through the fixed pipe. The carbon dioxide is squeezed by the pressure to drive the movable block to move downward. A small amount of carbon dioxide enters the rubber sleeve through the through groove, so that the rubber sleeve expands until its outer wall fits the drilled hole. A large amount of carbon dioxide enters the gap between the rock mass and the ore body through the jet end, and applies shock waves to the ore body to expand the gap between the rock mass and the ore body.

[0024] Step 6. When the shock wave of supercritical carbon dioxide fails to separate the ore body from the rock body, the pressure of carbon dioxide is increased to separate the rock body from the ore body. While the pressure in the multifunctional pipeline increases, the movable block drives the matching block to descend in the fixed pipe to separate the rubber sleeve from the multifunctional pipeline. The pressure in the rubber sleeve remains unchanged.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. When the present invention is used, the multifunctional pipeline is first moved to a designated position by means of a first lifting device and a second lifting device, and then the horizontal moving device is controlled, and then the drilling power device is connected to the multifunctional pipeline, holes are drilled on the rock mass and the ore body, and then the energy-gathering and pressurizing device is connected to the multifunctional pipeline, supercritical carbon dioxide is injected into the rock mass and the ore body, and the ore body is mined by means of shock waves, and the volume in the limited space is rapidly expanded by moving carbon dioxide to the gap between the rock mass and the ore body, forming a shock wave, which impacts the ore body, and expands the gap between the ore body and the rock body, thereby achieving a pre-cracking effect; at the same time, the rubber sleeve provided can block the hole drilled by the drill bit, prevent pressure relief and shock waves from leaking out of the hole, ensure that the actual pressure in the hole meets the expected pressure, and achieve an ideal mineral excavation effect, thereby making the ore body mining always controllable.

[0027] 2. The present invention realizes the precise positioning of the multifunctional pipeline through the cooperation of the lifting device and the horizontal moving device, making the operations of drilling and injecting carbon dioxide more accurate and improving the speed and efficiency of ore mining.

[0028] 3. The multifunctional pipeline in the present invention can be used in the drilling stage and can be converted into a channel for conveying supercritical carbon dioxide after the drilling is completed, thereby realizing the functional conversion of the equipment and simplifying the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the multifunctional pipeline and rubber sleeve of the present invention;

[0031] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0032] Figure 4 It is a cross-sectional view of the multifunctional pipe and rubber sleeve of the present invention;

[0033] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point B in the middle;

[0034] Figure 6 It is a partial structural exploded view of the present invention;

[0035] Figure 7 It is an exploded view of the horizontal moving device of the present invention;

[0036] Figure 8 Schematic diagram of supercritical carbon dioxide jet impacting rock mass;

[0037] Fig. 9 Illustration of supercritical carbon dioxide impacting and wedging a natural weak surface. Figure 1 ;

[0038] Fig.10 Illustration of supercritical carbon dioxide impacting and wedging a natural weak surface. Figure 2 .

[0039] In the figure: 1. base; 2. crawler-type moving device; 3. hydraulic cylinder; 4. first lifting device; 5. second lifting device; 6. top plate; 7. drilling power device; 8. energy-gathering and pressurizing device; 9. storage tank; 10. pipeline; 11. first moving block; 12. second moving block; 13. movable plate; 14. connecting block; 15. rubber block; 16. fixed frame; 17. horizontal moving device; 18. third moving block; 19. multi-functional pipeline; 20. fixed platform; 21. rubber sleeve; 22. fixed pipe; 23. movable block; 24. matching block; 25. through groove; 26. spring; 27. sliding groove; 28. jet end; 29. ​​first fixed groove; 30. second fixed groove; 31. first threaded column; 32. second threaded column; 33. drill bit; 34. blocking shell. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In order to solve the problem that the holes in the rock mass will cause the injected carbon dioxide to release pressure during the existing mining process, making the actual pressure lower than the expected pressure, thus causing the actual effect of mining minerals to be lower than the expected effect, please refer to Figure 1-10 , this embodiment provides the following technical solutions:

[0042] A supercritical carbon dioxide jet rock breaker comprises a base 1, on which a first lifting device 4 and two groups of second lifting devices 5 are arranged, a liftable movable plate 13 is arranged between the first lifting device 4 and the two groups of second lifting devices 5, the tops of the first lifting device 4 and the second lifting devices 5 are connected through a top plate 6, a movable drilling power device 7 and an energy-gathering and supercharging device 8 are arranged on the movable plate 13, and the first lifting device 4 and the two groups of second lifting devices 5 drive the drilling power device 7 and the energy-gathering and supercharging device 8 to be lifted and lowered by driving the movable plate 13.

[0043] The first lifting device 4 is provided with a movable first moving block 11, and the first moving block 11 is provided with a multifunctional pipe 19, and one end of the multifunctional pipe 19 is clamped on the first moving block 11; when the first lifting device 4 drives the first moving block 11 to move, the multifunctional pipe 19 is correspondingly driven to move, that is, the multifunctional pipe 19 is synchronously displaced with the drilling power device 7 and the energy gathering and boosting device 8.

[0044] A fixed platform 20 for sealing rock holes is fixed on the multifunctional pipe 19, a rubber sleeve 21 is sleeved on the fixed platform 20, a fixed tube 22 is arranged on the inner side of the rubber sleeve 21, and the fixed tube 22 is clamped on the multifunctional pipe 19; a sliding groove 27 is provided on the fixed tube 22, a movable block 23 is slidably clamped on the sliding groove 27, a matching block 24 is provided on the movable block 23, a spring 26 is sleeved on the matching block 24, the spring 26 is located in the sliding groove 27, and both ends of the spring 26 are in contact with the inner walls of the movable block 23 and the sliding groove 27 respectively; a plurality of groups of through grooves 25 are provided on the movable block 23, and the plurality of groups of through grooves 25 are all located in the sliding groove 27.

[0045] A detachable jet end 28 and a drill bit 33 are provided at the other end of the multifunctional pipe 19. A first threaded column 31 and a second threaded column 32 are respectively provided at both ends of the jet end 28. A blocking shell 34 is provided on the outside of the jet end 28; the first threaded column 31 is threadedly connected to the drill bit 33, and the second threaded column 32 is threadedly connected to the multifunctional pipe 19; a first fixed groove 29 and several groups of second fixed grooves 30 are provided in the jet end 28, the first fixed groove 29 is connected to several groups of second fixed grooves 30, the second fixed groove 30 is connected to the outside, and the first fixed groove 29 is connected to the multifunctional pipe 19.

[0046] A movable second moving block 12 is provided on the second lifting device 5, a connecting block 14 is fixedly connected to the lower part of the first moving block 11, the connecting block 14 and the second moving block 12 are both fixedly connected to the movable plate 13, a fixing frame 16 is fixedly connected to the movable plate 13, a horizontal moving device 17 is provided on the fixing frame 16, a movable third moving block 18 is provided on the horizontal moving device 17, and the drilling power device 7 and the energy gathering and boosting device 8 are fixedly connected to the third moving block 18 by bolts.

[0047] A plurality of groups of storage tanks 9 are arranged on the base 1 , and a pipeline 10 is arranged on one group of storage tanks 9 . The pipeline 10 is connected to the input end of the energy gathering and pressurizing device 8 .

[0048] The multifunctional pipeline 19 is detachably connected to the output end of the drilling power device 7 / energy-gathering and boosting device 8.

[0049] A crawler-type moving device 2 and a plurality of groups of hydraulic cylinders 3 are arranged below the base 1 . The crawler-type moving device 2 is installed on the bottom surface of the base 1 . The hydraulic cylinders 3 are arranged at the four corners of the bottom surface of the base 1 . The telescopic ends of the hydraulic cylinders 3 are provided with rubber blocks 15 .

[0050] In the above structure, the crawler mobile device 2, the first lifting device 4, the second lifting device 5, the drilling power device 7, the energy-gathering and pressurizing device 8 and the horizontal moving device 17 are all commonly used means by those skilled in the art, and their structures, connection methods and usage methods are all well known to those skilled in the art. Among them, the energy-gathering and pressurizing device 8 can concentrate carbon dioxide, increase the pressure of carbon dioxide, and make carbon dioxide reach a critical state. At this time, carbon dioxide is neither a liquid nor a gas, but at this time, carbon dioxide has the advantages of a gas-liquid two-phase fluid, so that it has both the low interfacial tension and easy diffusion of gas, and the high density and good solubility of liquid. It has super strong flow, transmission and permeability, can conduct natural fractures to the greatest extent, improve the conductivity of fractures, and has unique advantages in fracturing.

[0051] During the specific implementation of the energy-gathering and pressurizing device 8, when the carbon dioxide moves to the gap between the rock mass and the ore body, the carbon dioxide in the gap will gradually accumulate. When the density is too high, the temperature will rise accordingly. At this time, the liquid carbon dioxide undergoes a phase change due to the heat, and instantly changes from liquid to gas. The volume expands rapidly in a very short time and limited space, forming a high-speed jet, which "explodes" the coal body and causes cracks in the coal body to achieve a pre-cracking effect. At the same time, the rubber sleeve 21 can block the hole drilled by the drill bit 33 to prevent pressure relief and shock waves from escaping from the hole, so that the expected effect is similar to the actual effect, thereby ensuring that the mining of the ore body is always controllable.

[0052] When supercritical carbon dioxide is used to mine coal, the CO crawler mobile device 2 is used to displace the gas in the coal seam. The carbon dioxide activates the original cracks in the coal body, induces a small number of new cracks, and destroys the equilibrium state of the gas, causing the development of coal body cracks, separating the coal mine from the rock mass. At the same time, since the high-pressure gas effect and stress field effect after the phase change fracturing of the liquid CO crawler mobile device 2 are similar to those during the explosion of a closed container, the fracturing equivalent of the phase change fracturing device of the liquid CO crawler mobile device 2 can be estimated by being equivalent to the TNT equivalent, and can cause a shock wave with the same effect of explosives without using explosives, thereby improving the efficiency of coal mining.

[0053] In order to better demonstrate the working process of a supercritical carbon dioxide jet rock breaker, this embodiment proposes a method for using a supercritical carbon dioxide jet rock breaker, including the following steps:

[0054] Step 1: The rock breaker is moved to a designated position by means of a crawler-type mobile device 2, and then the hydraulic cylinder 3 is started to drive the base 1 to rise, so that the crawler-type mobile device 2 is separated from the ground, and the base 1 is stably supported on the ground;

[0055] Step 2: The staff starts the first lifting device 4 and the two sets of second lifting devices 5 at the same time, driving the movable plate 13 to move up and down, so that the multifunctional pipeline 19 moves to a specified height, and when the multifunctional pipeline 19 moves, the multifunctional pipeline 19 and the drilling power device 7 and the energy-gathering and supercharging device 8 are relatively stationary;

[0056] Step 3: firstly, the multifunctional pipe 19 is connected to the output end of the drilling power device 7 through a coupling, and then the drilling power device 7 is started, and a hole is drilled on the ore body and the rock body through the drill bit 33, and the drilling stops when the specified depth is reached, and the drilling power device 7 is separated from the multifunctional pipe 19;

[0057] Step 4: Start the horizontal moving device 17, which drives the energy-gathering and pressurizing device 8 to move to align with the multifunctional pipeline 19, and then connect the multifunctional pipeline 19 to the output end of the energy-gathering and pressurizing device 8, start the energy-gathering and pressurizing device 8, and move the carbon dioxide in the storage tank 9 into the energy-gathering and pressurizing device 8, which pressurizes the carbon dioxide to a supercritical state;

[0058] Step 5: Supercritical carbon dioxide is input into the multifunctional pipeline 19. The carbon dioxide first passes through the fixed pipe 22. The carbon dioxide is squeezed by the pressure to drive the movable block 23 to move downward. A small amount of carbon dioxide enters the rubber sleeve 21 through the through groove 25, so that the rubber sleeve 21 expands until its outer wall fits the drilled hole. A large amount of carbon dioxide enters the gap between the rock mass and the ore body through the jet end 28, and applies shock waves to the ore body to expand the gap between the rock mass and the ore body.

[0059] Step 6: When the shock wave of supercritical carbon dioxide fails to separate the ore body from the rock body, the pressure of carbon dioxide is increased to separate the rock body from the ore body. While the pressure in the multifunctional pipe 19 increases, the movable block 23 drives the matching block 24 to descend in the fixed pipe 22 to separate the rubber sleeve 21 from the multifunctional pipe 19. The pressure in the rubber sleeve 21 remains unchanged.

[0060] Working principle: The supercritical carbon dioxide jet rock breaker separates the ore body from the rock body by drilling and injecting supercritical carbon dioxide. During operation, the equipment is positioned to the work site by the crawler mobile device 2, and the base 1 is lifted by the hydraulic cylinder 3 to ensure stability. Then, the lifting device adjusts the height of the multifunctional pipeline 19 to make it reach the appropriate drilling position. After the drilling is completed, the drilling power device 7 is separated from the multifunctional pipeline 19, and the horizontal moving device 17 moves the energy-gathering and boosting device 8 to a position aligned with the multifunctional pipeline 19, and then connects the multifunctional pipeline 19 to the energy-gathering and boosting device 8. After the carbon dioxide in the storage tank 9 is heated and pressurized to a supercritical state by the energy-gathering and boosting device 8, it is injected into the gap between the rock body and the ore body through the multifunctional pipeline 19. The sealing mechanism on the multifunctional pipeline 19 blocks the drilling opening through the rubber sleeve 21 to prevent gas leakage and ensure sufficient pressure accumulation. Finally, the supercritical carbon dioxide expands rapidly inside the rock mass, forming a shock wave, which causes the ore body to separate from the rock mass, and realizes efficient and safe ore mining. The entire process improves mining efficiency and reduces manual risks through precise mechanical control and automated operation.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A supercritical carbon dioxide jet rock breaker, comprising a base (1), characterized in that: The base (1) is provided with a first lifting device (4) and two sets of second lifting devices (5); a movable plate (13) that can be lifted and lowered is provided between the first lifting device (4) and the two sets of second lifting devices (5); and a movable drilling power device (7) and an energy-gathering and pressurizing device (8) are provided on the movable plate (13); The first lifting device (4) is provided with a multifunctional pipe (19), the multifunctional pipe (19) is provided with a sealing mechanism for sealing the rock mass holes, and the other end of the multifunctional pipe (19) is provided with a detachable jet end (28) and a drill bit (33); The sealing mechanism comprises a fixing platform (20), the fixing platform (20) is fixedly connected to the multifunctional pipeline (19), a rubber sleeve (21) is sleeved on the fixing platform (20), a fixing pipe (22) is arranged inside the rubber sleeve (21), and the fixing pipe (22) is clamped on the multifunctional pipeline (19).

2. A supercritical carbon dioxide jet rock breaker according to claim 1, characterized in that: The fixed tube (22) is provided with a sliding groove (27), a movable block (23) is slidably mounted on the sliding groove (27), a matching block (24) is provided on the movable block (23), a spring (26) is sleeved on the matching block (24), the spring (26) is located in the sliding groove (27), and two ends of the spring (26) are respectively in contact with the inner wall of the movable block (23) and the sliding groove (27); the movable block (23) is provided with a plurality of groups of through grooves (25), and the plurality of groups of through grooves (25) are all located in the sliding groove (27).

3. A supercritical carbon dioxide jet rock breaker according to claim 2, characterized in that: The two ends of the jet end (28) are respectively provided with a first threaded column (31) and a second threaded column (32); the first threaded column (31) penetrates into the drill bit (33) and is threadedly connected to the drill bit (33); the second threaded column (32) is threadedly connected to one end of the multifunctional pipe (19); a first fixing groove (29) and a plurality of groups of second fixing grooves (30) are provided in the jet end (28); the first fixing groove (29) is communicated with the plurality of groups of second fixing grooves (30); the second fixing groove (30) is communicated with the outside; and the first fixing groove (29) is communicated with the multifunctional pipe (19).

4. A supercritical carbon dioxide jet rock breaker according to claim 3, characterized in that: The first lifting device (4) is provided with a movable first moving block (11), the second lifting device (5) is provided with a movable second moving block (12), a connecting block (14) is fixedly connected below the first moving block (11), the connecting block (14) and the second moving block (12) are both fixedly connected to a movable plate (13), and a fixing frame (16) is fixedly connected to the movable plate (13); one end of the multifunctional pipe (19) is clamped on the first moving block (11).

5. A supercritical carbon dioxide jet rock breaker according to claim 4, characterized in that: The fixing frame (16) is provided with a horizontal moving device (17), and a movable third moving block (18) is provided on the horizontal moving device (17). The drilling power device (7) and the energy gathering and pressurizing device (8) are fixedly connected to the third moving block (18) by bolts.

6. A supercritical carbon dioxide jet rock breaker according to claim 5, characterized in that: A plurality of groups of storage tanks (9) are arranged on the base (1), one group of storage tanks (9) being provided with a pipeline (10), and the pipeline (10) is connected to the input end of the energy gathering and pressurizing device (8).

7. A supercritical carbon dioxide jet rock breaker according to claim 6, characterized in that: The multifunctional pipeline (19) is in communication with the output end of the energy-gathering and pressurizing device (8), and the multifunctional pipeline (19) and the output end of the energy-gathering and pressurizing device (8) are detachably connected.

8. The supercritical carbon dioxide jet rock breaker according to claim 7, characterized in that: The multifunctional pipeline (19) is connected to the output end of the drilling power device (7) via a coupling, and the multifunctional pipeline (19) is detachably connected to the output end of the drilling power device (7).

9. A supercritical carbon dioxide jet rock breaker according to claim 8, characterized in that: A crawler-type moving device (2) and a plurality of groups of hydraulic cylinders (3) are arranged below the base (1); the crawler-type moving device (2) is mounted on the bottom surface of the base (1); the hydraulic cylinders (3) are respectively arranged at the four corners of the bottom surface of the base (1); and rubber blocks (15) are arranged at the telescopic ends of the hydraulic cylinders (3).

10. A method for using a supercritical carbon dioxide jet rock breaker, based on the supercritical carbon dioxide jet rock breaker according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The rock breaker is moved to a designated position by means of a crawler-type moving device (2), and then the hydraulic cylinder (3) is started to drive the base (1) to rise, so that the crawler-type moving device (2) is separated from the ground, and the base (1) is stably supported on the ground; Step 2: The staff simultaneously activates the first lifting device (4) and the two sets of second lifting devices (5), driving the movable plate (13) to move up and down, so that the multifunctional pipeline (19) moves to a specified height, and when the multifunctional pipeline (19) moves, the multifunctional pipeline (19) and the drilling power device (7) and the energy-gathering and pressurizing device (8) are relatively stationary; Step 3: firstly, the multifunctional pipeline (19) is connected to the output end of the drilling power device (7) through a coupling, then the drilling power device (7) is started, and a hole is drilled on the ore body and the rock body through the drill bit (33), and the drilling is stopped when the specified depth is reached, and the drilling power device (7) is separated from the multifunctional pipeline (19); Step 4: Start the horizontal moving device (17), the horizontal moving device (17) drives the energy-gathering and pressurizing device (8) to move to align with the multifunctional pipeline (19), then connect the multifunctional pipeline (19) to the output end of the energy-gathering and pressurizing device (8), start the energy-gathering and pressurizing device (8), and the carbon dioxide in the storage tank (9) moves into the energy-gathering and pressurizing device (8), and the energy-gathering and pressurizing device (8) pressurizes the carbon dioxide to a supercritical state; Step 5: The carbon dioxide in a supercritical state is input into the multifunctional pipeline (19). The carbon dioxide first passes through the fixed pipe (22). The carbon dioxide is squeezed by the pressure to drive the movable block (23) to move downward. A small amount of carbon dioxide enters the rubber sleeve (21) through the through groove (25), so that the rubber sleeve (21) expands until its outer wall fits the drilled hole. A large amount of carbon dioxide enters the gap between the rock mass and the ore body through the jet end (28), and applies shock waves to the ore body to expand the gap between the rock mass and the ore body. Step 6: When the shock wave of the supercritical carbon dioxide fails to separate the ore body from the rock body, the pressure of the carbon dioxide is increased to separate the rock body from the ore body. While the pressure in the multifunctional pipe (19) increases, the movable block (23) drives the matching block (24) to descend in the fixed pipe (22) to separate the rubber sleeve (21) from the multifunctional pipe (19). The pressure in the rubber sleeve (21) remains constant.

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