Supercritical carbon dioxide jet rock breaker and method of use

Abstract

The application discloses a supercritical carbon dioxide jet rock breaking machine and a use method, and belongs to the technical field of mine exploitation. The application comprises a base, the base is provided with a first lifting device and two groups of second lifting devices, a liftable movable plate is arranged between the first lifting device and the two groups of second lifting devices, a movable drilling power device and an energy-gathering pressurizing device are arranged on the movable plate. The application solves the problem that rock body drilling can cause the injected carbon dioxide to be depressurized, so that the actual pressure is lower than the expected pressure. The application sets a rubber sleeve for plugging the drilling hole on the multifunctional pipeline, effectively prevents the leakage of carbon dioxide during the injection process, ensures sufficient pressure for the separation of rock body and ore body, and through the design of the multifunctional pipeline and the detachable jet end, realizes the flexible switching and efficient operation of the equipment functions, and greatly improves the safety and efficiency of mine exploitation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mine exploitation, in particular to a supercritical carbon dioxide jet rock breaking machine and a use method. BACKGROUND

[0002] The underground resource continuous exploitation technology refers to a resource exploitation technical idea for ensuring continuous deformation of resources and surrounding geological environment. The technical idea regards the underground resources and the surrounding geological environment as an organic whole, and uses technical means to ensure continuous change of a mathematical model including a resource geometric body and a ground stress field in time and space dimensions in the development process, so that a scientific engineering environment is created for avoiding disasters, improving production efficiency and intelligent exploitation level. The supercritical carbon dioxide is usually used for coal mining.

[0003] For example, patent application No. 2024104088833 discloses a superhigh-pressure supercritical carbon dioxide jet rock breaking device, which comprises a carbon dioxide storage and transportation tank, a third air compressor, a pry fixed part and a drilling machine. The pry fixed part comprises a carbon dioxide pressurizing unit and a carbon dioxide energy gathering pressure releasing unit. An industrial carbon dioxide storage and transportation tank provides a gas source, carbon dioxide is injected into the carbon dioxide pressurizing unit for storage and pressurization, when the pressure of the stored carbon dioxide reaches a set value, the pressure is maintained, the pressurized carbon dioxide is injected into the carbon dioxide energy gathering pressure releasing unit for heating and temperature rising, so that the carbon dioxide reaches a supercritical state and the pressure exceeds 100 MPa, and finally the superhigh-pressure supercritical carbon dioxide is input into the drilling machine to complete rock breaking. When the underground resources are continuously exploited, high-pressure carbon dioxide is injected into the rock mass to separate the rock mass from the ore body, so that the purpose of exploiting minerals is achieved.

[0004] However, when the rock mass is drilled and carbon dioxide is injected into the rock mass, a large amount of carbon dioxide will leak out of the drilling opening, which will cause the actual pressure to be lower than the expected pressure, so that the effect of excavating minerals is not as ideal as expected. SUMMARY

[0005] The application aims to provide a supercritical carbon dioxide jet rock breaking machine and a use method, which effectively prevents the leakage of carbon dioxide during the injection process by arranging a rubber sleeve for plugging the drilling hole on the multifunctional pipeline, ensures sufficient pressure for separating the rock mass from the ore body, and realizes flexible switching and efficient operation of the equipment functions through the design of the multifunctional pipeline and the detachable jet end, greatly improves the safety and efficiency of mine exploitation, and solves the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0007] A supercritical carbon dioxide jet rock breaking machine, comprising a base, a first lifting device and two groups of second lifting devices are arranged on the base, a liftable movable plate is arranged between the first lifting device and the two groups of second lifting devices, a movable drilling power device and an energy concentration pressurizing device are arranged on the movable plate;

[0008] A multifunctional pipeline is arranged on the first lifting device, a sealing mechanism for sealing a rock hole is arranged on the multifunctional pipeline, and a detachable jet end and a drill bit are arranged at the other end of the multifunctional pipeline.

[0009] The sealing mechanism comprises a fixed table, the fixed table is fixedly connected to the multifunctional pipeline, a rubber sleeve is sleeved on the fixed table, and a fixed pipe is arranged on the inner side of the rubber sleeve.

[0010] Preferably, a sliding groove is formed in the fixed pipe, a movable block is slidably clamped in the sliding groove, a matching block is arranged on the movable block, a spring is sleeved on the matching block, and the spring is located in the sliding groove and in contact with the inner wall of the sliding groove at both ends.

[0011] Preferably, first and second threaded columns are arranged at both ends of the jet end, the first threaded column penetrates into the drill bit and is threadedly connected with the drill bit, and the second threaded column is threadedly connected with one end of the multifunctional pipeline; a first fixed groove and a plurality of second fixed grooves are formed in the jet end, the first fixed groove is in communication with the plurality of second fixed grooves, the second fixed grooves are in communication with the outside, and the first fixed groove is in communication with the multifunctional pipeline.

[0012] Preferably, a movable first moving block is arranged on the first lifting device, a movable second moving block is arranged on the second lifting device, a connecting block is fixedly connected below the first moving block, the connecting block and the second moving block are fixedly connected with the movable plate, and a fixed frame is fixedly connected to the movable plate; one end of the multifunctional pipeline is clamped on the first moving block.

[0013] Preferably, a horizontal moving device is arranged on the fixed frame, a movable third moving block is arranged on the horizontal moving device, and the drilling power device and the energy concentration pressurizing device are fixedly connected to the third moving block through bolts.

[0014] Preferably, a plurality of storage tanks are arranged on the base, a pipeline is arranged on one of the storage tanks, and the pipeline is in communication with the input end of the energy concentration pressurizing device.

[0015] Preferably, the multifunctional pipeline is in communication with the output end of the energy concentration pressurizing device, and the multifunctional pipeline and the output end of the energy concentration pressurizing device are detachably connected.

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

[0017] Preferably, a track-type moving device is arranged below the base, and a plurality of groups of hydraulic cylinders are arranged on the base, the track-type moving device is arranged on the bottom surface of the base, the hydraulic cylinders are arranged at the four corners of the bottom surface of the base, and rubber blocks are arranged at the extension ends of the hydraulic cylinders.

[0018] A use method of a supercritical carbon dioxide jet rock breaking machine, based on a supercritical carbon dioxide jet rock breaking machine, comprises the following steps:

[0019] Step one: the rock breaking machine is moved to a designated position by the track-type moving device, then the hydraulic cylinders are started to drive the base to rise, so that the track-type moving device is separated from the ground, and the base is stably supported on the ground;

[0020] Step two: the first lifting device and the two groups of second lifting devices are started by the staff at the same time to drive the movable plate to rise and fall, so that the multifunctional pipeline is moved to a designated height, and the multifunctional pipeline is relatively static with the drilling power device and the energy-gathering pressurizing device when the multifunctional pipeline is moved;

[0021] Step three: first, the multifunctional pipeline is connected with the output end of the drilling power device through a shaft coupling, then the drilling power device is started, and drilling is performed on the ore body and rock mass through the drill bit, the drilling is stopped when the designated depth is reached, and the drilling power device is separated from the multifunctional pipeline;

[0022] Step four: the horizontal moving device is started, the horizontal moving device drives the energy-gathering pressurizing device to move to be aligned with the multifunctional pipeline, then the multifunctional pipeline is connected with the output end of the energy-gathering pressurizing device, the energy-gathering pressurizing device is started, the carbon dioxide in the storage tank is moved to the energy-gathering pressurizing device, and the energy-gathering pressurizing device pressurizes the carbon dioxide to a supercritical state;

[0023] Step five: the carbon dioxide in the supercritical state is input into the multifunctional pipeline, the carbon dioxide first passes through the fixed pipe, the carbon dioxide is squeezed through the pressure to drive the movable block to move downward, a small amount of carbon dioxide enters the rubber sleeve through the through slot to make the rubber sleeve expand until the outer wall of the rubber sleeve is in close contact with the drilled hole, and a large amount of carbon dioxide enters the gap between the rock mass and the ore body through the jet end to apply an impact wave to the ore body to expand the gap between the rock mass and the ore body;

[0024] Step six: when the impact wave of the supercritical carbon dioxide does not separate the ore body from the rock mass, the pressure of the carbon dioxide is increased at this time to separate the ore body from the rock mass, and the pressure in the multifunctional pipeline is increased at the same time, the movable block drives the matching block to descend in the fixed pipe, the rubber sleeve is separated from the multifunctional pipeline, and the pressure in the rubber sleeve is always kept unchanged.

[0025] Compared with the prior art, the present application has the beneficial effects that:

[0026] 1、The present application is used, first of all, through the first lifting device and the second lifting device, the multifunctional pipeline is moved to the designated position, then the horizontal moving device is controlled, then the drilling power device is connected with the multifunctional pipeline, drilling is carried out on the rock mass and the ore body, then the energy-gathering pressurizing device is connected with the multifunctional pipeline, supercritical carbon dioxide is injected into the rock mass and the ore body, the ore body is mined through the shock wave, the limited space is expanded sharply through the movement of carbon dioxide to the gap between the rock mass and the ore body, the shock wave is formed, the ore body is impacted, the gap between the ore body and the rock mass is expanded, the pre-splitting effect is achieved; at the same time, the rubber sleeve arranged can block the hole drilled by the drill bit, prevent the pressure relief and the shock wave from leaking out of the hole, ensure that the actual pressure in the hole meets the expected pressure, and make the mining effect of the ore body reach the ideal state, so that the mining of the ore body is always controllable.

[0027] 2、The present application realizes the accurate positioning of the multifunctional pipeline through the cooperation of the lifting device and the horizontal moving device, makes the drilling and the injection of carbon dioxide more accurate, and improves the speed and efficiency of the mining of the ore body.

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

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

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

[0031] Figure 3 It is a schematic diagram of the Figure 2 enlarged view of position A in the present application;

[0032] Figure 4 It is a sectional view of the multifunctional pipeline and the rubber sleeve of the present application;

[0033] Figure 5 It is a schematic diagram of the Figure 4 enlarged view of position B in the present application;

[0034] Figure 6 It is a partial structure exploded view of the present application;

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

[0036] Figure 8 It is a schematic diagram of the jet flow of supercritical carbon dioxide impacting the rock mass;

[0037] Figure 9 Schematic diagram of impact and wedge of supercritical carbon dioxide on natural weak surface Figure 1 ;

[0038] Figure 10 Schematic diagram of impact and wedge of supercritical carbon dioxide on 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 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, fixing frame; 17, horizontal moving device; 18, third moving block; 19, multifunctional pipeline; 20, fixed table; 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 technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] In order to solve the problem that in the existing mining process, the hole on the rock mass will cause the injected carbon dioxide to be depressurized, so that the actual pressure is lower than the expected pressure, thereby causing the actual effect of excavating minerals to be lower than the expected effect, please refer to Figures 1-10 The technical solutions are provided in the embodiments as follows:

[0042] A supercritical carbon dioxide jet rock breaking machine, comprising a base 1, a first lifting device 4 and two groups of second lifting devices 5 are arranged on the base 1, a movable plate 13 is arranged between the first lifting device 4 and the two groups of second lifting devices 5, the top parts of the first lifting device 4 and the second lifting devices 5 are connected through a top plate 6, a drilling power device 7 and an energy-gathering pressurizing device 8 are arranged on the movable plate 13, the first lifting device 4 and the two groups of second lifting devices 5 drive the movable plate 13 to drive the drilling power device 7 and the energy-gathering pressurizing device 8 to lift.

[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 pipeline 19, one end of the multifunctional pipeline 19 is clamped on the first moving block 11; when the first lifting device 4 drives the first moving block 11 to displace, the multifunctional pipeline 19 is correspondingly driven to displace, that is, the multifunctional pipeline 19 synchronously displaces with the drilling power device 7 and the energy-gathering supercharging device 8.

[0044] The multifunctional pipeline 19 is fixed with a fixed table 20 for sealing a rock hole, the fixed table 20 is sleeved with a rubber sleeve 21, the inner side of the rubber sleeve 21 is provided with a fixed pipe 22, the fixed pipe 22 is clamped on the multifunctional pipeline 19; the fixed pipe 22 is provided with a sliding groove 27, the sliding groove 27 is slidably clamped with a movable block 23, the movable block 23 is provided with a matching block 24, the matching block 24 is sleeved with a spring 26, the spring 26 is located in the sliding groove 27, and the spring 26 is in contact with the inner wall of the sliding groove 27 at both ends; 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 located in the sliding groove 27.

[0045] The other end of the multifunctional pipeline 19 is provided with a detachable jet end 28 and a drill bit 33, the jet end 28 is provided with a first threaded column 31 and a second threaded column 32 at both ends respectively, and the jet end 28 is provided with a blocking shell 34 outside; the first threaded column 31 is in threaded connection with the drill bit 33, and the second threaded column 32 is in threaded connection with the multifunctional pipeline 19; the jet end 28 is provided with a first fixed groove 29 and a plurality of groups of second fixed grooves 30, the first fixed groove 29 is in communication with the plurality of groups of second fixed grooves 30, the second fixed grooves 30 are in communication with the outside, and the first fixed groove 29 is in communication with the multifunctional pipeline 19.

[0046] The second lifting device 5 is provided with a movable second moving block 12, the first moving block 11 is fixedly connected with a connecting block 14 below, the connecting block 14 and the second moving block 12 are fixedly connected with a movable plate 13, the movable plate 13 is fixedly connected with a fixed frame 16, the fixed frame 16 is provided with a horizontal moving device 17, the horizontal moving device 17 is provided with a movable third moving block 18, and the drilling power device 7 and the energy-gathering supercharging device 8 are fixedly connected on the third moving block 18 through bolts.

[0047] The base 1 is provided with a plurality of groups of storage tanks 9, one of the groups of storage tanks 9 is provided with a pipeline 10, and the pipeline 10 is in communication with an input end of the energy-gathering supercharging device 8.

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

[0049] The bottom of the base 1 is provided with a track-type moving device 2 and a plurality of groups of hydraulic cylinders 3, the track-type moving device 2 is installed on the bottom surface of the base 1, the hydraulic cylinders 3 are respectively arranged at the four corner positions of the bottom surface of the base 1, and the telescopic end of the hydraulic cylinder 3 is provided with a rubber block 15.

[0050] In the above structure, the track-type moving device 2, the first lifting device 4, the second lifting device 5, the drilling power device 7, the energy-gathering pressurizing device 8 and the horizontal moving device 17 are all means commonly used by those skilled in the art, and their structures, connection modes and use modes are all known to those skilled in the art. Among them, the energy-gathering pressurizing device 8 can concentrate carbon dioxide and increase the pressure of carbon dioxide, so that the carbon dioxide reaches a critical state. At this time, the carbon dioxide is neither a liquid nor a gas, but at this time the carbon dioxide has the advantages of gas-liquid two-phase flow, so that it has the low interfacial tension and easy diffusion of gas, and also has the high density and good solubility of liquid, has super strong flow, transmission and penetration performance, can maximize the conduction of natural cracks, improve the conductivity of cracks, and has unique advantages in fracturing.

[0051] In the specific implementation process of the energy-gathering pressurizing device 8, when the carbon dioxide moves to the gap between the rock mass and the ore body, the carbon dioxide at the gap will gradually accumulate. When the density is too high, the temperature will rise. At this time, the liquid carbon dioxide is phase changed from liquid to gas instantaneously, and the volume expands sharply in a very short time and limited space to form a high-speed jet, which "detonates" and impacts the coal body, causes cracks in the coal body, and achieves the effect of pre-splitting. At the same time, the rubber sleeve 21 can block the hole drilled by the drill bit 33 to prevent pressure relief and shock wave from leaking out of the hole, so that the expected effect is similar to the actual effect, so that the mining of the ore body is always controllable.

[0052] When supercritical carbon dioxide is used to mine coal mines, the CO track-type moving device 2 is used to displace gas in the coal seam, the original fissures in the coal body are activated by carbon dioxide, a small amount of new fissures are induced, the balance state of the gas is destroyed, the development of the coal body cracks is caused, the coal mine and the rock mass are separated, and the stress field action and the action of the high-pressure gas after the phase change of the liquid CO track-type moving device 2 are similar to the explosion of the sealed container. The cracking equivalent of the phase change and cracking device of the liquid CO track-type moving device 2 can be estimated by equivalent to the TNT equivalent, and the same effect of the shock wave caused by the explosive can be caused without using the explosive, so that the efficiency of mining the coal mine is improved.

[0053] In order to better show the working process of a supercritical carbon dioxide jet rock breaking machine, the embodiment proposes a use method of the supercritical carbon dioxide jet rock breaking machine, which comprises the following steps:

[0054] Step one, the rock breaking machine moves to the designated position through the tracked moving device 2, and then starts the hydraulic cylinder 3 to drive the base 1 to rise, so that the tracked moving device 2 is separated from the ground, and the base 1 is stably supported on the ground;

[0055] Step two, the staff simultaneously starts the first lifting device 4 and the two groups of second lifting devices 5 to drive the movable plate 13 to lift, so that the multifunctional pipeline 19 moves to the designated height, and when the multifunctional pipeline 19 moves, the multifunctional pipeline 19 is relatively static with the drilling power device 7 and the energy-gathering supercharging device 8;

[0056] Step three, first, the multifunctional pipeline 19 is connected with the output end of the drilling power device 7 through a coupling, then the drilling power device 7 is started, and drilling is carried out on the ore body and rock mass through the drill bit 33, and when the drilling reaches the designated depth, the drilling power device 7 is stopped and separated from the multifunctional pipeline 19;

[0057] Step four, the horizontal moving device 17 is started, the horizontal moving device 17 drives the energy-gathering supercharging device 8 to move to align with the multifunctional pipeline 19, then the multifunctional pipeline 19 is connected with the output end of the energy-gathering supercharging device 8, the energy-gathering supercharging device 8 is started, the carbon dioxide in the storage tank 9 moves into the energy-gathering supercharging device 8, and the energy-gathering supercharging device 8 pressurizes the carbon dioxide to a supercritical state;

[0058] Step five, the supercritical state carbon dioxide is input into the multifunctional pipeline 19, the carbon dioxide first passes through the fixed pipe 22, the carbon dioxide is squeezed through 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 slot 25 to make the rubber sleeve 21 expand until its outer wall is in close contact with the drilled hole, and a large amount of carbon dioxide enters the gap between the rock mass and the ore body through the jet head 28 to apply a shock wave to the ore body to expand the gap between the rock mass and the ore body;

[0059] Step six, when the shock wave of the supercritical carbon dioxide does not separate the ore body and the rock mass, the pressure of the carbon dioxide is increased at this time to separate the ore body and the rock mass, and at the same time that the pressure in the multifunctional pipeline 19 increases, the movable block 23 drives the matching block 24 to descend in the fixed pipe 22, so that the rubber sleeve 21 is separated from the multifunctional pipeline 19, and the pressure in the rubber sleeve 21 remains unchanged.

[0060] Working principle: The supercritical carbon dioxide jet rock breaking machine realizes the separation of ore body and rock mass by drilling and injecting supercritical carbon dioxide. During operation, the device is positioned at the work site by the tracked 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 pipe 19 to reach the appropriate drilling position. After drilling is completed, the drilling power device 7 is separated from the multifunctional pipe 19, the horizontal moving device 17 moves the energy-gathering pressurizing device 8 to a position aligned with the multifunctional pipe 19, and then connects the multifunctional pipe 19 with the energy-gathering pressurizing device 8. The carbon dioxide in the storage tank 9 is heated and pressurized to a supercritical state by the energy-gathering pressurizing device 8, and then injected into the gap between the rock mass and the ore body through the multifunctional pipe 19. The sealing mechanism on the multifunctional pipe 19 blocks the drilling opening with a rubber sleeve 21 to prevent gas leakage and ensure sufficient pressure accumulation. Finally, the supercritical carbon dioxide rapidly expands inside the rock mass, forming a shock wave that promotes the separation of the ore body and the rock mass, achieving efficient and safe mining of the ore. The entire process is controlled by precise mechanical control and automated operation, improving mining efficiency and reducing manual risk.

[0061] It should be noted that the relational terms herein such as first and second, and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0062] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, which can be understood by those skilled in the art.

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 is provided between the first lifting device (4) and the two sets of second lifting devices (5). A movable drilling power device (7) and a power-concentrating pressurizing device (8) are provided on the movable plate (13). The first lifting device (4) is equipped with a multi-functional pipe (19), and the multi-functional pipe (19) is equipped with a sealing mechanism for sealing rock hole. The other end of the multi-functional pipe (19) is equipped with a detachable jet end (28) and a drill bit (33). The sealing mechanism includes a fixed platform (20), which is fixedly connected to the multi-functional pipe (19). A rubber sleeve (21) is fitted on the fixed platform (20), and a fixed tube (22) is provided on the inner side of the rubber sleeve (21). The fixed tube (22) is clamped onto the multi-functional pipe (19). The fixed tube (22) is provided with a sliding groove (27), and a movable block (23) is slidably mounted on the sliding groove (27). A mating block (24) is provided on the movable block (23), and a spring (26) is fitted on the mating 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. Several sets of through grooves (25) are provided on the movable block (23), and all sets of through grooves (25) are located in the sliding groove (27).

2. The supercritical carbon dioxide jet rock breaker according to claim 1, characterized in that, The jet end (28) is provided with a first threaded post (31) and a second threaded post (32) at both ends. The first threaded post (31) is inserted into the drill bit (33) and threadedly connected to the drill bit (33). The second threaded post (32) is threadedly connected to one end of the multi-functional pipe (19). The jet end (28) is provided with a first fixing groove (29) and several sets of second fixing grooves (30). The first fixing groove (29) is connected to several sets of second fixing grooves (30). The second fixing grooves (30) are connected to the outside. The first fixing groove (29) is connected to the multi-functional pipe (19).

3. A supercritical carbon dioxide jet rock breaker according to claim 2, characterized in that, The first lifting device (4) is provided with a movable first moving block (11), and 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). Both the connecting block (14) and the second moving block (12) are fixedly connected to the movable plate (13). A fixed frame (16) is fixedly connected to the movable plate (13). One end of the multi-functional pipe (19) is snapped onto the first moving block (11).

4. A supercritical carbon dioxide jet rock breaker according to claim 3, characterized in that, The fixed 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-concentrating pressurizing device (8) are fixedly connected to the third moving block (18) by bolts.

5. A supercritical carbon dioxide jet rock breaker according to claim 4, characterized in that, The base (1) is provided with several sets of storage tanks (9), one of which is provided with a pipe (10) and the pipe (10) is connected to the input end of the energy-concentrating pressurizing device (8).

6. A supercritical carbon dioxide jet rock breaker according to claim 5, characterized in that, The multifunctional pipe (19) is connected to the output end of the energy-concentrating pressurizing device (8), and the multifunctional pipe (19) and the output end of the energy-concentrating pressurizing device (8) are detachably connected.

7. A supercritical carbon dioxide jet rock breaker according to claim 6, characterized in that, The multifunctional pipe (19) is connected to the output end of the drilling power device (7) via a coupling, and the multifunctional pipe (19) and the output end of the drilling power device (7) are detachably connected.

8. A supercritical carbon dioxide jet rock breaker according to claim 7, characterized in that, The base (1) is provided with a tracked mobile device (2) and several sets of hydraulic cylinders (3) below it. The tracked mobile device (2) is installed on the bottom surface of the base (1), and the hydraulic cylinders (3) are respectively located at the four corners of the bottom surface of the base (1). The telescopic end of the hydraulic cylinder (3) is provided with a rubber block (15).

9. A method of using a supercritical carbon dioxide jet rock breaker, implemented based on the supercritical carbon dioxide jet rock breaker described in claim 8, characterized in that, Includes the following steps: Step 1: The rock breaker moves to the designated position via the tracked mobile device (2), and then the hydraulic cylinder (3) is activated to lift the base (1), so that the tracked mobile 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 two sets of second lifting devices (5) to lift the movable plate (13) and move the multi-functional pipe (19) to the specified height. When the multi-functional pipe (19) moves, the multi-functional pipe (19) is relatively stationary with the drilling power device (7) and the energy-concentrating pressurizing device (8). Step 3: First, connect the multi-functional pipe (19) to the output end of the drilling power device (7) through a coupling. Then start the drilling power device (7) and drill holes in the ore body and rock body through the drill bit (33). Stop drilling when the specified depth is reached, and separate the drilling power device (7) from the multi-functional pipe (19). Step 4: Start the horizontal moving device (17). The horizontal moving device (17) drives the energy-concentrating pressurizing device (8) to move to align with the multi-functional pipe (19). Then connect the multi-functional pipe (19) to the output end of the energy-concentrating pressurizing device (8). Start the energy-concentrating pressurizing device (8). The carbon dioxide in the storage tank (9) moves into the energy-concentrating pressurizing device (8). The energy-concentrating pressurizing device (8) pressurizes the carbon dioxide to a supercritical state. Step 5: Supercritical carbon dioxide is introduced into the multi-functional pipe (19). The carbon dioxide first passes through the fixed pipe (22). The carbon dioxide is squeezed through the pressure and drives the movable block (23) to move downward. A small amount of carbon dioxide enters the rubber sleeve (21) through the through groove (25), causing the rubber sleeve (21) to expand until its outer wall fits with 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), applying 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 supercritical carbon dioxide fails to separate the ore body from the rock mass, the pressure of carbon dioxide is increased to separate the rock mass from the ore body. As the pressure inside the multi-functional pipe (19) increases, the movable block (23) drives the matching block (24) to descend inside the fixed pipe (22), separating the rubber sleeve (21) from the multi-functional pipe (19). The pressure inside the rubber sleeve (21) remains constant.

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