Liquid oxygen rock breaking system and rock breaking method

Abstract

The invention discloses a liquid oxygen rock breaking system and method, the system comprises an oxygenation system, a gas distribution system, a fracturing rock breaking pipe system, an excitation system and an electrostatic prevention and removal grounding system, a fracturing rock breaking pipe comprises a flexible outer sleeve film, an oxygenation guide pipe in the flexible outer sleeve film extends to the bottom and is filled with an adsorption combustion agent, and the top end of the flexible outer sleeve film is sealed through a hole sealing filling body. The method comprises the steps of manufacturing and installing the fracturing rock breaking pipe, sealing holes through the hole sealing filling body, laying the gas distribution pipeline and the wire, precisely injecting oxygen and synchronously exciting. Through modular integration and structural innovation, the problems that in a traditional liquid oxygen rock breaking technology, oxygenation is not uniform, pressure is unbalanced, excitation is not synchronous and the like are solved. The multi-stage gas distribution system is combined with the flow distributor to achieve dynamic distribution of liquid oxygen according to the drilling depth, the flexible outer sleeve film is matched with the hole sealing filling body to form a pressure self-balancing structure, a wire network is excited in parallel to guarantee millisecond-level synchronous ignition of multiple pipes, and static electricity prevention and removal grounding guarantees construction safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of rock crushing, and in particular relates to a liquid oxygen rock breaking system and a liquid oxygen rock breaking method. Background Art

[0002] Compared to traditional explosive blasting techniques, a liquid oxygen-biomass green, high-energy, instantaneous-release rock-breaking technology, based on liquid oxygen and carbon-based materials as blasting or rock-breaking media, offers advantages such as safety, cost-effectiveness, greenness, low carbon footprint, and ease of construction. This technology, a gas rock-breaking technology (also known as "new energy (liquid oxygen) rock-breaking technology," "supercritical liquefied air energy storage (LAES) non-regenerative rock-breaking technology," "liquefied air energy storage (LAES) supercritical biomass gasification rock-breaking technology," "liquid oxygen transient phase change expansion rock-breaking technology," and "liquid oxygen explosives"), involves installing a fracturing device into a borehole, laying out a fluid pipeline, and then filling the fracturing tube with liquid fracturing media via liquid oxygen storage and filling equipment. This triggers an electric ignition device, igniting an adsorbed combustion agent within the tube. The adsorbed combustion agent reacts with the liquid fracturing medium, releasing high-pressure gas to fracture the rock. The implementation of this technology mainly involves the efficient transportation and distribution of oxygen, self-balancing of pressure in the fractured rock-breaking pipe, static electricity prevention system, fractured rock-breaking pipe excitation network and other related contents. Currently, there is a lack of a complete integrated network system technology to coordinate the management of these key links, resulting in limited rock-breaking efficiency and increased safety risks. Summary of the Invention

[0003] The first object of the present invention is to provide a liquid oxygen rock breaking system, which is conducive to improving rock breaking efficiency.

[0004] A second object of the present invention is to provide a liquid oxygen rock breaking method.

[0005] The first technical solution adopted by the present invention is that the liquid oxygen rock breaking system includes an oxygenation system and a fracturing rock breaking pipe system, the oxygenation system and the fracturing rock breaking pipe system are connected by a gas distribution system, and the fracturing rock breaking pipe system is also connected to an excitation system; wherein the fracturing rock breaking pipe system includes a plurality of fracturing rock breaking pipes installed in a borehole; the fracturing rock breaking pipe includes a flexible outer membrane installed in the borehole, the flexible outer membrane is filled with an adsorbed combustion agent, an oxygenation conduit is provided in the flexible outer membrane, the gas outlet end of the oxygenation conduit extends to the bottom of the flexible outer membrane, a sealing plug body sealed with the borehole is provided at the top of the fracturing rock breaking pipe, and the gas inlet end of the oxygenation conduit passes through the sealing plug body and is connected to the gas distribution system.

[0006] The first technical solution of the present invention is also characterized in that: The gas distribution system includes a gas distribution main pipe, which is connected to multiple gas distribution main branch pipes through multiple flow distributors. The end of the gas distribution main branch pipe is connected to a gas distribution main branch pipe fork pipe, and the gas distribution main branch pipe fork pipe is connected to multiple gas distribution branch pipes; the multiple gas distribution branch pipes are connected to the air inlet ends of multiple oxygen filling tubes.

[0007] The gas distribution main pipe and the gas distribution main branch pipe are connected through a flow distributor.

[0008] The oxygenation system includes liquid oxygen storage equipment and liquid oxygen filling equipment, which are connected via a liquid oxygen delivery pipeline; the liquid oxygen filling equipment is connected to the gas distribution main.

[0009] A regulating valve is installed on the liquid oxygen delivery pipeline.

[0010] The excitation system includes an excitation initiator, which is connected to a main excitation wire, which is connected in parallel to multiple networked excitation wires, which are connected to an excitation wire located inside a fractured rock breaking pipe, and multiple electric ignition devices are installed on the excitation wire.

[0011] An exhaust pipe is provided through the sealing filler body.

[0012] The oxygenation system, the fracture and rock breaking pipe system, the gas distribution system and the excitation system are all connected to the static prevention and grounding system.

[0013] The second technical solution adopted by the present invention is a liquid oxygen rock breaking method, which adopts the above-mentioned liquid oxygen rock breaking system and includes the following steps: S1: making fractured rock pipe; S2: Drill multiple boreholes in the target rock mass and install the fracture-breaking pipes into the boreholes; S3: Install the sealing plug to seal the hole, connect the oxygen supply conduit to the gas distribution branch pipe, and connect the excitation wire to the excitation wire of the network outside the hole; S4: Liquid oxygen filling equipment injects oxygen into the fractured rock breaking pipe; S5: When the oxygen filling volume reaches 95%-100%, personnel evacuate to the safe area, and the detonator is activated to trigger the electric ignition device to complete the rock breaking.

[0014] The second technical solution of the present invention is also characterized in that: S1 specifically includes: installing an adsorbed combustion agent, an oxygenating conduit, an electric ignition device, an excitation wire, and an exhaust pipe into the flexible outer shell to produce a fracture-breaking rock pipe; S4 is specifically as follows: the liquid oxygen filling equipment transports the liquid oxygen in the liquid oxygen storage equipment to the gas distribution main pipe through the liquid oxygen transmission pipeline; the liquid oxygen in the gas distribution main pipe is dynamically distributed to each gas distribution main branch pipe according to the drilling depth through the flow distributor, and the liquid oxygen is injected into the oxygen filling conduit from the gas distribution branch pipe and adsorbed by the adsorption combustion agent.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention significantly improves the safety and efficiency of liquid oxygen rock breaking technology through modular system integration and key structural innovation. The multi-stage gas distribution system adopts an annular main pipe and a flow distributor to achieve dynamic and precise distribution of liquid oxygen according to the depth of the drilling, solving the problem of uneven oxygenation in traditional technologies. The flexible outer membrane cooperates with the sealing filler and the exhaust pipe to form a pressure self-balancing structure, stabilizes the pressure in the rock breaking pipe, and avoids energy leakage and damage to the membrane. The excitation system realizes millisecond-level synchronous excitation of multiple tubes through a parallel wire network, solving the problem of different rock breaking effects caused by traditional triggering asynchrony. The double electrostatic grounding system eliminates the static risk generated by the friction of liquid oxygen flow and improves construction safety. The present invention reduces liquid oxygen loss while ensuring the rock breaking effect, and the overall construction efficiency and construction safety are improved compared with the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the liquid oxygen rock breaking system of the present invention; Figure 2 Schematic diagram of the structure of the oxygenation system in the liquid oxygen rock breaking system of the present invention; Figure 3 This is a schematic structural diagram of the gas distribution system in the liquid oxygen rock breaking system of the present invention; Figure 4 This is a schematic structural diagram of the static electricity prevention and grounding system in the liquid oxygen rock breaking system of the present invention; Figure 5 Schematic diagram of the structure of the excitation system in the liquid oxygen rock breaking system of the present invention; Figure 6 It is a schematic diagram of the structure of the fracture rock breaking pipe in the liquid oxygen rock breaking system of the present invention.

[0017] In the figure, 1. liquid oxygen storage equipment, 2. liquid oxygen transmission pipeline, 3. liquid oxygen filling equipment, 4. gas distribution main pipe, 5. gas distribution main branch pipe, 6. gas distribution main branch pipe branch pipe, 7. gas distribution branch pipe, 8. fracture rock breaking pipe, 9. networked excitation wire, 10. main excitation wire, 11. excitation initiator, 12. static electricity elimination facility, 13. regulating valve, 14. static electricity prevention and control grounding system, 15. flow distributor, 16. oxygen filling conduit, 17. adsorption combustion agent, 18. electric ignition device, 19. excitation wire, 20. exhaust pipe, 21. flexible outer membrane, 22. bottom hole static electricity prevention and control grounding body, 23. sealing hole filling body, 24. ground static electricity prevention and control grounding body. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] Example 1 like Figure 1 and Figure 6 As shown, the liquid oxygen rock breaking system disclosed in this embodiment includes an oxygenation system and a fracturing rock breaking pipe system, which are connected to each other through a gas distribution system, and the fracturing rock breaking pipe system is also connected to an excitation system; wherein, the fracturing rock breaking pipe system includes a plurality of fracturing rock breaking pipes 8 installed in a borehole; the fracturing rock breaking pipe 8 includes a flexible outer membrane 21 installed in the borehole, the flexible outer membrane 21 is filled with an adsorbed combustion agent 17, an oxygenation conduit 16 is provided in the flexible outer membrane 21, the gas outlet end of the oxygenation conduit 16 extends to the bottom of the flexible outer membrane 21, a sealing plug 23 sealed with the borehole is provided at the top of the fracturing rock breaking pipe 8, and the gas inlet end of the oxygenation conduit 16 passes through the sealing plug 23 and is connected to the gas distribution system.

[0020] In this embodiment, the flexible outer membrane 21 is made of a membrane material with good flexibility, toughness, and low-temperature resistance. The adsorbent combustion agent 17 has good adsorption and flammability, and possesses a large amount of internal voids. This system achieves liquid oxygen rock breaking through a modular design. The oxygenation system provides liquid oxygen, the gas distribution system distributes it to the fracture-breaking pipes 8 in each borehole, and the excitation system triggers the explosion. The flexible outer membrane 21 is adaptable to boreholes of varying diameters. The oxygenation conduit 16 extends to the bottom of the membrane to ensure even distribution of liquid oxygen. The sealing plug 23 seals the borehole, resolving the problems of uneven delivery and unreliable sealing in existing technologies and improving the system's applicability and energy efficiency.

[0021] Example 2 like Figure 3 As shown, based on Example 1, the gas distribution system includes a gas distribution main pipe 4, to which multiple gas distribution main branch pipes 5 are connected through multiple flow distributors 15, and the ends of the gas distribution main branch pipes 5 are connected to gas distribution main branch pipe fork pipes 6, and the gas distribution main branch pipe fork pipes 6 are connected to multiple gas distribution branch pipes 7; the multiple gas distribution branch pipes 7 are connected to the air inlet ends of multiple oxygenation ducts 16.

[0022] In this embodiment, the main gas distribution pipe 4 is constructed of corrosion-resistant, high-strength, and low-temperature-resistant flexible tubing, such as corrugated flexible copper pipe, corrugated flexible stainless steel pipe, or corrugated flexible aluminum pipe. The main gas distribution pipe 4 is arranged in a ring or grid pattern to ensure even distribution of liquid oxygen to each fracture-breaking pipe. The main gas distribution pipe 5 is made of similar material to the main gas distribution pipe 4 and functions to further distribute the liquid oxygen in the main gas distribution pipe to different areas. The branch pipes 6 of the main gas distribution pipe are constructed of low-temperature-resistant, high-strength, and corrosion-resistant flexible tubing. Their function is to precisely distribute the liquid oxygen in the main gas distribution pipe to smaller operating areas, such as within a borehole. The number of ports is determined based on factors such as the project scale and the distribution of fracture-breaking pipes. The branch pipes 6 precisely distribute the liquid oxygen in the main gas distribution pipe 5 to more specific operating areas. The branch pipes 7 are constructed of low-temperature-resistant, high-strength, and corrosion-resistant flexible tubing, such as flexible copper pipe, flexible stainless steel pipe, flexible aluminum pipe, or flexible plastic pipe. They can be flexibly arranged based on the actual terrain and borehole location of the rock breaking site. The plastic pipe can be a PU pipe, a PTU pipe, a PE pipe, etc.

[0023] This embodiment uses a multi-stage branching structure to distribute liquid oxygen. The annular gas distribution main pipe 4 connects to the main branch pipe 5, bifurcated pipe 6, and branch pipe 7 via a flow distributor 15, ultimately connecting to the oxygenation conduits 16. This design shortens the delivery path and reduces cooling loss. By dynamically adjusting the flow rate to each borehole through the flow distributor, it addresses the low efficiency of traditional systems with single-pipe, single-control systems and the difficulty in balancing oxygenation between deep and shallow holes, supporting large-scale cluster operations.

[0024] Furthermore, the main gas distribution pipe 4 and the main gas distribution branch pipe 5 are connected via a flow distributor 15 .

[0025] In this embodiment, the liquid oxygen flow rate of each gas distribution main branch 5 is controlled by adjusting the flow distributor 15 to adapt to the liquid oxygen consumption requirements of different drilling depths, diameters and rock characteristics, thereby achieving precise liquid oxygen distribution.

[0026] Example 3 like Figure 2 As shown, based on Example 1, the oxygenation system includes a liquid oxygen storage device 1 and a liquid oxygen filling device 3, and the liquid oxygen storage device 1 and the liquid oxygen filling device 3 are connected through a liquid oxygen delivery pipeline 2; the liquid oxygen filling device 3 is connected to the gas distribution main 4.

[0027] In this embodiment, the liquid oxygen storage equipment 1 adopts a liquid oxygen storage tank with a vacuum insulation structure, which has good thermal insulation performance and can effectively reduce the evaporation loss of liquid oxygen. It can be a liquid oxygen tank truck, storage tank or Dewar tank, etc. The liquid oxygen delivery pipeline 2 uses a low-temperature resistant, high-strength flexible pipeline as the liquid oxygen delivery pipeline. The liquid oxygen filling equipment 3 has good low-temperature performance, pumping capacity and sealing performance, and can adopt equipment such as a low-temperature liquid oxygen pump or an intelligent liquid oxygen filling machine. The oxygen filling pump is connected to the control system and can automatically adjust the pumping rate according to the data feedback from the liquid level sensor and the pressure sensor to ensure that the liquid oxygen can be quickly and stably delivered to the gas distribution system.

[0028] Furthermore, a regulating valve 13 is installed on the liquid oxygen delivery pipeline 2 .

[0029] In this embodiment, a flow control valve 13 is installed in the liquid oxygen delivery pipeline 2 to precisely control the liquid oxygen flow rate according to operational requirements. This embodiment forms a linear delivery chain consisting of the liquid oxygen storage device 1, the control valve 13, the filling device 3, and the delivery pipeline 2. The control valve controls the flow rate in real time, the filling device boosts pressure to overcome vertical resistance, and the cryogenically resistant pipeline reduces cooling loss. This solves the problem of low delivery efficiency caused by the easy vaporization of liquid oxygen and the lack of a flow control mechanism, ensuring stable delivery of liquid oxygen to the gas distribution system.

[0030] Example 4 like Figure 5 and Figure 6 As shown, based on Example 1, the excitation system includes an excitation detonator 11, which is connected to a main excitation wire 10, and the main excitation wire 10 is connected in parallel with multiple networked excitation wires 9, which are connected to an excitation wire 19 located inside the fracture-breaking rock pipe 8, and multiple electric ignition devices 18 are installed on the excitation wire 19.

[0031] In this embodiment, a parallel wire network is used to achieve multi-tube synchronous excitation. The excitation initiator 11 connects the excitation wires 19 in each rock-breaking tube to the electric ignition device 18 through the main excitation wire 10 and the networked excitation wire 9. This design achieves millisecond-level synchronous excitation of multiple tubes with a deviation of ≤10ms. The electric ignition device directly contacts the adsorbed combustion agent to improve reliability. The shielded wire has strong anti-interference ability, which solves the problem of uneven rock-breaking effect caused by poor trigger synchronization of traditional detonators. On the basis of embodiment 1, an exhaust pipe 20 is provided through the sealing filler 23 .

[0032] In this embodiment, the exhaust pipe 20 remains unobstructed and leads outside the borehole, dynamically balancing the internal and external pressures of the fractured rock pipe 8. The sealing plug 23 seals the borehole, while the exhaust pipe 20 discharges vaporized oxygen to maintain pressure within the membrane. The plug fits snugly within the borehole, ensuring concentrated utilization of explosive energy. The exhaust pipe controls pressure within a safe range of 0.2-0.3 MPa. The reusable sealing structure reduces costs and solves the problem of energy leakage caused by poor borehole sealing and damage to the fractured rock pipe due to excessive pressure.

[0033] Example 6 like Figure 4 As shown, based on Example 1, the oxygenation system, the fracture and rock breaking pipe system, the gas distribution system and the excitation system are all connected to the static electricity prevention and grounding system 14.

[0034] In this embodiment, the static electricity prevention and control grounding system 14 includes: static electricity prevention and control grounding for the metal casings of the oxygenation system, exhaust system, fracture and rock breaking pipe system, and other related equipment, as well as static electricity prevention and control grounding for human static electricity entering the work site. Static electricity prevention and control facility 12 can be a static eliminator or a static electricity elimination channel. Static electricity prevention and control facilities 12 are installed at the entrance of the work site, and static electricity prevention and control grounding bodies are installed in the static eliminator facilities. Before entering the work site, workers can promptly conduct human static electricity into the ground by touching the static eliminator or passing through the static electricity elimination channel. Static electricity prevention and control grounding system 14 can be individually set up or formed into a static electricity prevention and control grounding network according to the static electricity prevention and control grounding requirements of different systems. Furthermore, the static electricity prevention and grounding system for the fractured rock breaking pipe 8 includes a ground static electricity prevention and grounding 24 for the exposed end of the oxygenation conduit 16 and a bottom static electricity prevention and grounding 22 for the bottom hole. Specifically, a bottom static electricity prevention and grounding body 22 is provided at the bottom of the fractured rock breaking pipe 8. One end of the bottom static electricity prevention and grounding body 22 is connected to the bottom end of the oxygenation conduit 16, while the other end extends out of the flexible outer membrane 21 and contacts the ground at the bottom of the hole, forming a static electricity elimination and conduction channel. Each system is connected to the ground through the grounding system 14 to form an equipotential body. The grounding resistance is ≤10Ω, and a double grounding ground + bottom hole design is adopted. This structure eliminates static electricity generated by the friction of liquid oxygen flow, prevents the risk of explosion caused by static electricity accumulation, resolves the safety hazards of traditional liquid oxygen rock breaking systems, and improves construction reliability.

[0035] The present invention also discloses a liquid oxygen rock breaking method, which uses the above-mentioned liquid oxygen rock breaking system and includes the following steps: S1: making a fractured rock pipe 8; Specifically, an adsorbent combustion agent (17), an oxygenating conduit (16), an electric ignition device (18), an excitation wire (19) and an exhaust pipe (20) are installed in a flexible outer shell (21) to produce a fracture rock breaking pipe (8); S2: Drilling multiple boreholes in the target rock mass and installing the fracture-breaking pipes 8 into the boreholes; S3: Install the sealing plug 23 to seal the hole, connect the oxygenation conduit 16 to the gas distribution branch pipe 7, and connect the excitation wire 19 to the excitation wire 9 outside the hole network; S4: The liquid oxygen filling device 3 injects oxygen into the fracture rock breaking pipe 8; Specifically, the liquid oxygen filling device 3 transports the liquid oxygen in the liquid oxygen storage device 1 to the gas distribution main pipe 4 through the liquid oxygen delivery pipeline 2; the liquid oxygen in the gas distribution main pipe 4 is dynamically distributed to each gas distribution main branch pipe 5 according to the drilling depth through the flow distributor 15, and the liquid oxygen is injected into the oxygen filling conduit 16 from the gas distribution branch pipe 7 and adsorbed by the adsorption combustion agent 17.

[0036] S5: When the oxygen filling volume reaches 95%-100%, the personnel evacuate to the outside of the safe area, and the detonator 11 is activated to trigger the electric ignition device 18 to complete the rock breaking.

[0037] In specific use, the liquid oxygen rock breaking method specifically includes the following steps: S1: Before installing the fracture-breaking pipe 8, inspect the borehole. If any abnormalities are found, clean the hole or re-drill immediately. Determine whether to add an appropriate amount of water to the borehole based on the actual situation to increase the humidity at the bottom of the borehole and ensure effective electrical connection between the static electricity grounding element at the bottom of the fracture-breaking pipe and the ground at the bottom of the hole.

[0038] S2: After the drilling is normal, the fracture-breaking pipe 8 is installed into the drill hole.

[0039] S3: Check the conduction of the excitation wire 19 of the fracture rock breaking pipe 8 and the electric ignition device.

[0040] S4: Determine whether to add an appropriate amount of water to the sealing plug 23 according to actual conditions to increase the humidity of the sealing plug 23 and ensure the conductive material oxygen filling conduit 16 is connected to the sealing plug 23 and the ground.

[0041] S5: Connect the oxygen-filled conduit 16 of the fracturing and rock-breaking pipe 8 to the gas distribution network outside the borehole.

[0042] S6: Connect the excitation conductors 19 of the fracture-breaking pipes 8 in the same borehole section using the networked excitation conductors 9. Connect the networked excitation conductors 9 to the main excitation conductors 10. Connect the main excitation conductors 10 to the excitation initiator 11. Wrap all the connection points of the excitation conductors 19 with waterproof electrical insulation tape. Use an electrical multimeter or other means to check the conductivity of the excitation conductor 19 network.

[0043] S7: Liquid oxygen storage equipment 1 and liquid oxygen filling equipment 3 are positioned and connected to the liquid oxygen delivery pipeline. The liquid oxygen storage equipment 1 and liquid oxygen filling equipment 3 must be positioned no lower than the borehole's orifice elevation. Liquid oxygen delivery pipeline 2 connects the liquid oxygen storage equipment 1 and liquid oxygen filling equipment 3.

[0044] S8: Lay out the static anti-static grounding system 14 for the metal casings of the oxygenation system, gas distribution system, fractured rock breaking pipes, and other related equipment. The static anti-static grounding system 14 can be set up individually or form a static anti-static grounding network according to the static anti-static grounding requirements of different systems.

[0045] S9: Start the liquid oxygen filling equipment 3 and perform oxygen filling operation on the fracture and rock breaking pipe 8 through the gas distribution network.

[0046] S10: Close the oxygenation pipe 16 and the exhaust pipe 20.

[0047] S11: Start the excitation initiator 11, and excite the electric ignition device 18 in the rock fracturing pipe 8 through the excitation wire 19. The adsorbed combustion agent 17 and the liquid fracturing medium are reacted by combustion through the electric ignition device 18, and then high-pressure gas is released to achieve rock fracturing.

[0048] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Liquid oxygen rock breaking system, characterized by: The invention comprises an oxygenation system and a fractured rock breaking pipe system, wherein the oxygenation system and the fractured rock breaking pipe system are connected via an air distribution system, and the fractured rock breaking pipe system is also connected to an excitation system; wherein the fractured rock breaking pipe system comprises a plurality of fractured rock breaking pipes (8) installed in a borehole; the fractured rock breaking pipe (8) comprises a flexible outer membrane (21) installed in the borehole, the flexible outer membrane (21) is filled with an adsorbent combustion agent (17), an oxygenation conduit (16) is provided in the flexible outer membrane (21), the air outlet end of the oxygenation conduit (16) extends to the bottom of the flexible outer membrane (21), a sealing plug (23) sealed with the borehole is provided at the top of the fractured rock breaking pipe (8), and an air inlet end of the oxygenation conduit (16) passes through the sealing plug (23) and is connected to the air distribution system.

2. The liquid oxygen rock breaking system according to claim 1, characterized in that: The gas distribution system comprises a gas distribution main pipe (4), a plurality of gas distribution main branch pipes (5) are connected to the gas distribution main pipe (4) via a plurality of flow distributors (15), the ends of the gas distribution main branch pipes (5) are connected to gas distribution main branch pipe fork pipes (6), and the gas distribution main branch pipe fork pipes (6) are connected to a plurality of gas distribution branch pipes (7); the plurality of gas distribution branch pipes (7) are connected to the gas inlet ends of a plurality of oxygenation pipes (16).

3. The liquid oxygen rock breaking system according to claim 2, characterized in that: The gas distribution main pipe (4) and the gas distribution main branch pipe (5) are connected via a flow distributor (15).

4. The liquid oxygen rock breaking system according to claim 1, characterized in that: The oxygenation system comprises a liquid oxygen storage device (1) and a liquid oxygen filling device (3), wherein the liquid oxygen storage device (1) and the liquid oxygen filling device (3) are connected via a liquid oxygen delivery pipeline (2); and the liquid oxygen filling device (3) is connected to a gas distribution main pipe (4).

5. The liquid oxygen rock breaking system according to claim 4, characterized in that: A regulating valve (13) is installed on the liquid oxygen delivery pipeline (2).

6. The liquid oxygen rock breaking system according to claim 1, characterized in that: The excitation system includes an excitation initiator (11), the excitation initiator (11) is connected to a main excitation wire (10), the main excitation wire (10) is connected in parallel to a plurality of networked excitation wires (9), the networked excitation wires (9) are connected to an excitation wire (19) located inside a fracture-breaking rock pipe (8), and a plurality of electric ignition devices (18) are installed on the excitation wire (19).

7. The liquid oxygen rock breaking system according to claim 1, characterized in that: An exhaust pipe (20) is provided through the sealing filler body (23).

8. The liquid oxygen rock breaking system according to claim 1, characterized in that: The oxygenation system, the rock breaking pipe system, the gas distribution system and the excitation system are all connected to the static prevention and grounding system (14).

9. A liquid oxygen rock breaking method, using the liquid oxygen rock breaking system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: making fractured rock pipe (8); S2: Drilling multiple boreholes in the target rock mass and installing the fracture-breaking pipe (8) into the boreholes; S3: Install the sealing plug (23) to seal the hole, connect the oxygen supply conduit (16) to the gas distribution branch pipe (7), and connect the excitation wire (19) to the excitation wire (9) outside the hole network; S4: Liquid oxygen filling equipment (3) injects oxygen into the fractured rock breaking pipe (8); S5: When the oxygen filling volume reaches 95%-100%, the personnel evacuate to the outside of the safe area, and the detonator (11) is activated to trigger the electric ignition device (18), completing the rock breaking.

10. The liquid oxygen rock breaking method according to claim 9, characterized in that: S1 specifically comprises: installing an adsorbent combustion agent (17), an oxygenation conduit (16), an electric ignition device (18), an excitation wire (19) and an exhaust pipe (20) into the flexible outer shell (21) to produce a fracture-breaking rock pipe (8); S4 is specifically as follows: the liquid oxygen filling device (3) transports the liquid oxygen in the liquid oxygen storage device (1) to the gas distribution main pipe (4) through the liquid oxygen delivery pipeline (2); the liquid oxygen in the gas distribution main pipe (4) is dynamically distributed to each gas distribution main branch pipe (5) according to the drilling depth through the flow distributor (15); the liquid oxygen is injected into the oxygen filling conduit (16) from the gas distribution branch pipe (7) and is adsorbed by the adsorption combustion agent (17).

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