Detonation excitation phase change rock breaking device

Abstract

The utility model provides a detonation excitation phase change rock breaking device which comprises a liquid storage body arranged in a blast hole, the liquid storage body is expandable, an overburden layer is arranged above the liquid storage body in the blast hole, an absorber and an excitation device are arranged in the liquid storage body, an electronic detonator and an emulsion explosive are arranged in the excitation device, and the electronic detonator is provided with a detonating cord extending out of the blast hole. A liquid conveying pipe and an exhaust pipe are further arranged, the lower end of the liquid conveying pipe is inserted into the lower end of the interior of the liquid storage body, and the lower end of the exhaust pipe is communicated with the upper end of the interior of the liquid storage body. The problem that the blasting effect is poor due to the fact that liquefied air rock breaking is low in detonation time precision and insufficient in liquefied air gasification is solved.

Description

Technical Field

[0001] This utility model relates to the field of blasting construction, and in particular to a detonation-induced phase change rock-breaking device. Background Technology

[0002] Accidents caused by explosive explosions occur frequently in blasting projects every year, bringing not only safety issues but also numerous environmental problems, such as rock debris and dust pollution. Along with the many serious problems brought about by explosive blasting, non-explosive rock breaking technologies, such as liquefied air rock breaking, have become a key research focus in recent years. Compared with traditional blasting methods, non-explosive rock breaking methods are quieter, safer, and less polluting, solving many rock breaking needs under special conditions and with limited construction work. They also offer good controllability, providing more opportunities for achieving green rock breaking. However, liquefied air rock breaking also has problems such as low precision in initiation time and incomplete vaporization of liquefied air leading to poor blasting effects. Utility Model Content

[0003] This invention provides a detonation-induced phase change rock-breaking device, which solves the problems of low initiation time accuracy and poor blasting effect caused by insufficient gasification of liquefied air in rock breaking.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a detonation-induced phase change rock-breaking device, comprising a storage liquid disposed in a blast hole, the storage liquid being expandable, a soil covering layer above the storage liquid in the blast hole, an absorber and an activation device disposed in the storage liquid, the activation device comprising an electronic detonator and an emulsion explosive, the electronic detonator having a detonating wire extending out of the blast hole, and also comprising a liquid delivery pipe and an exhaust pipe, the lower end of the liquid delivery pipe being inserted into the lower end of the storage liquid, the lower end of the exhaust pipe being connected to the upper end of the storage liquid, and a liquid phase change accelerant being injected into the absorber through the liquid delivery pipe, the absorber absorbing the accelerant.

[0005] In the preferred embodiment, the absorbent is a hollow cylindrical structure and is fitted onto the outside of the infusion tube, and the absorbent has a porous fibrous outer layer.

[0006] In the preferred embodiment, the infusion tube is made of conductive material, and a grounding wire is wrapped around the end of the infusion tube extending out of the rupture hole. A grounding rod is provided at the end of the grounding wire, and the grounding rod is inserted into the ground.

[0007] In the preferred embodiment, the combustion accelerant is liquid oxygen or liquid air.

[0008] In the preferred embodiment, the orifice frame is also included, with a retaining plate at the lower end of the orifice frame, the upper end of the liquid storage being connected to the retaining plate, and a soil covering layer covering the top of the retaining plate.

[0009] In the preferred embodiment, the upper end of the liquid storage container is open and a base plate is provided at the opening. Multiple downward extension rods are provided circumferentially at the lower end of the base plate. The absorber is sleeved on the downward extension rods. A hollow hole is provided in the center of the base plate, and a sealing seat is provided at the hollow hole. The upper end of the sealing seat is connected to a retaining plate. An exhaust pipe passes through the retaining plate so that its lower end is connected to the sealing seat. A hollow rod is provided at the lower end of the sealing seat. An excitation device is sleeved on the hollow rod. The sealing seat is also provided with a transition air passage. The upper and lower ends of the transition air passage are connected to the exhaust pipe and the liquid storage container, respectively. The liquid delivery pipe and the detonation wire are located inside the exhaust pipe.

[0010] In the preferred embodiment, the exhaust pipe is slidably sleeved with the retaining plate. The lower end of the retaining plate is provided with multiple guide blocks along the circumference. The guide blocks are provided with arc-shaped guide grooves. The lower end of the arc-shaped guide grooves faces the sealing seat, and the upper end of the arc-shaped guide grooves faces the inner wall of the blast hole. The upper end of the sealing seat is provided with multiple deformable anchors along the circumference. The upper end of the anchors is inserted into the arc-shaped guide grooves. A slidable floating sleeve is also sleeved on the hollow rod. The upper end of the floating sleeve is provided with a hole plug. A connecting air hole is provided between the transition air passage and the liquid storage cavity. The hole plug is used to seal the connecting air hole.

[0011] In the preferred embodiment, an indicator sleeve is provided at the upper end of the exhaust pipe.

[0012] The beneficial effects of this utility model are as follows: By combining a small amount of explosives with phase change materials, the amount of explosives used is greatly reduced, avoiding the safety, pollution, and noise problems caused by large-scale explosive explosions. At the same time, by using a small amount of explosives for detonation, sufficient heat is provided for the liquefied air phase change, increasing the rock-breaking power of the liquefied air phase change. The difficulty and pressure of transporting large amounts of explosives are reduced, the requirements for on-site explosives storage and pyrotechnic blasting material storage are lessened, and blasting costs are lowered. The device is designed as a two-component assembly, which can be pre-installed before construction without occupying the site period, greatly saving construction time. The use of retaining plates to separate the rock-breaking device from the covering soil layer prevents soil clods from crowding the space below the blast hole during backfilling, which would cause the liquid filling to be substandard and affect the blasting effect. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of a simple detonation phase change rock-breaking device before it is filled with liquid.

[0015] Figure 2 This is a schematic diagram of a simple detonation phase change rock-breaking device after it has been filled with liquid.

[0016] Figure 3 This is a schematic diagram of the assembled detonation phase change rock-breaking device before it is filled with liquid.

[0017] Figure 4 This is a schematic diagram of the assembled detonation phase change rock-breaking device after it has been filled with liquid.

[0018] Figure 5 This is a schematic diagram of the first component.

[0019] Figure 6 This is a magnified view of a portion of the first component.

[0020] Figure 7 This is a schematic diagram of the second component.

[0021] Figure 8 This is a cross-sectional view of the device.

[0022] In the diagram: 1. Liquid storage; 2. Absorber; 3. Activation device; 301. Electronic detonator; 302. Emulsion explosive; 4. Base plate; 401. Lower extension rod; 402. Hole; 5. Infusion pipe; 6. Exhaust pipe; 7. Blasting hole; 8. Retaining plate; 801. Sealing seat; 802. Anchor nail; 803. Guide block; 804. Arc-shaped guide groove; 805. Hole; 806. Transition air passage; 807. Transition hole; 808. Sealing layer; 809. Plug; 810. Connecting air hole; 811. Small diameter guide rod; 812. Limiting slide groove; 813. Detonating wire; 9. Cover layer; 10. Grounding rod; 11. Grounding wire; 1101. Orifice frame; 13. Indicator sleeve; 14. Combustion accelerant. Detailed Implementation

[0023] Example 1:

[0024] like Figure 1-8 A detonation-induced phase change rock-breaking device includes a liquid storage 1 installed in a blast hole 7. The liquid storage 1 is expandable. A soil cover layer 10 is provided above the liquid storage 1 in the blast hole 7. An absorber 2 and an ignition device 3 are provided in the liquid storage 1. The ignition device 3 is equipped with an electronic detonator 301 and an emulsion explosive 302. The electronic detonator 301 is equipped with a detonating wire 9 extending out of the blast hole 7. It is also equipped with a liquid delivery pipe 5 and an exhaust pipe 6. The lower end of the liquid delivery pipe 5 is inserted into the lower end of the liquid storage 1. The lower end of the exhaust pipe 6 is connected to the upper end of the liquid storage 1. A liquid phase change accelerant 14 is injected into the absorber 2 through the liquid delivery pipe 5. The absorber 2 absorbs the accelerant 14.

[0025] In the preferred embodiment, the absorber 2 is a hollow cylindrical structure and is sleeved on the outside of the infusion tube 5. The absorber 2 is provided with a porous fibrous outer layer.

[0026] In the preferred embodiment, the infusion tube 5 is made of conductive material, and a grounding wire 1101 is wrapped around one end of the infusion tube 5 that extends out of the rupture hole 7. A grounding rod 11 is provided at the end of the grounding wire 1101, and the grounding rod 11 is inserted into the ground.

[0027] In the preferred embodiment, the combustion accelerant 14 is liquid oxygen or liquid air.

[0028] The higher the liquid oxygen content in liquid air, the better it supports combustion during an explosion; liquid oxygen can also be directly introduced.

[0029] The content of electronic detonator 301 and emulsion explosive 302 is relatively low, which increases safety.

[0030] The absorber 2 can be made of rolled paper, the infusion tube 5 can be made of aluminum tube, the liquid storage 1 can be made of waterproof bag, and the activating device 3 has an internal cavity for accommodating the electronic detonator 301 and the emulsion explosive 302, and is externally equipped with multiple protective layers. During assembly, the activating device 3 with the detonating wire 9 and multiple rolls of paper are threaded onto the infusion tube 5, covered with a waterproof bag, and the infusion tube 5 and the exhaust pipe 6 are inserted into the waterproof bag and sealed to form an integrated structure.

[0031] After liquid oxygen is filled into the storage liquid 1, due to the rise in external temperature, the pressure inside the rupture hole 7 is much lower than that in the liquid oxygen tank, and the liquid oxygen has a tendency to vaporize. Therefore, it is necessary to cover the storage liquid 1 with a certain thickness of soil to provide a closed environment, maintain the low temperature, and restrain the vaporization trend.

[0032] Therefore, the construction workers inserted the integrated structure into the blast hole 7 and backfilled the hole opening with soil. One end of the infusion pipe 5 was connected to the liquid oxygen pipe, and the liquid oxygen was pumped into the storage liquid 1, where the absorber 2 absorbed the liquid oxygen. After the storage liquid 1 was full, a small amount of liquid oxygen would be ejected through the exhaust pipe 6; pumping should be stopped immediately.

[0033] After the personnel evacuated, the ignition device remotely detonated the ignition device 3 via the detonation wire 9, which ignited the absorber 2 and caused the remaining liquid oxidizer 14 to rapidly vaporize. The stored liquid 1 expanded rapidly and acted on the blast hole 7, breaking the rock.

[0034] like Figure 1-2 Because the liquid storage 1 is made of flexible materials such as waterproof bags, when the integrated structure is first made, the liquid storage 1 is in a relatively flat and contracted state. There is a gap between the liquid storage 1 and the inner wall of the blast hole 7. When backfilling with soil, some soil clods will be directly embedded in the cavity and occupy a certain volume. As a result, when liquid oxygen is subsequently filled, the liquid storage 1 cannot reach the predetermined volume, and the liquid oxygen is insufficient, which affects the blasting power.

[0035] In a preferred embodiment, the orifice frame 12 is also included, with a retaining plate 8 at the lower end of the orifice frame 12, the upper end of the liquid storage 1 being connected to the retaining plate 8, and the soil covering layer 10 covering the top of the retaining plate 8.

[0036] The upper end of the orifice frame 12 is larger than the diameter of the blast hole 7 and is locked at the upper end of the blast hole 7. The orifice frame 12 is equipped with multiple connecting shafts and holds the retaining plate 8. The diameter of the retaining plate 8 is similar to the inner diameter of the blast hole 7. When backfilling, most of the soil blocks are blocked by the retaining plate 8 and will not fall into the space below the retaining plate 8.

[0037] In a preferred embodiment, the upper end of the liquid storage 1 is open and a base plate 4 is provided at the opening. Multiple downward extension rods 401 are provided circumferentially at the lower end of the base plate 4. The absorber 2 is sleeved on the downward extension rods 401. A hollow hole 402 is provided in the center of the base plate 4. A sealing seat 801 is provided at the hollow hole 402. The upper end of the sealing seat 801 is connected to the retaining plate 8. The exhaust pipe 6 passes through the retaining plate 8 so that its lower end is connected to the sealing seat 801. A hollow rod 805 is provided at the lower end of the sealing seat 801. The excitation device 3 is sleeved on the hollow rod 805. The sealing seat 801 is also provided with a transition air passage 806. The upper and lower ends of the transition air passage 806 are respectively connected to the exhaust pipe 6 and the liquid storage 1. The liquid delivery pipe 5 and the detonation wire 9 are located inside the exhaust pipe 6.

[0038] The transition air passage 806 is provided with a transition hole 807 that communicates with the hollow rod 805. The infusion tube 5 and the detonation wire 9 are inserted into the hollow rod 805, the transition hole 807, the transition air passage 806 and the exhaust pipe 6. The transition hole 807 is filled with a sealant layer 808 to separate the transition air passage 806 from the interior of the hollow rod 805.

[0039] Hollow rod 805 is arranged coaxially with exhaust pipe 6.

[0040] The infusion tube 5 extends out of the bottom of the hollow rod 805. The cavity between the inner wall of the lower end of the hollow rod 805 and the outer wall of the infusion tube 5 is filled with glue to seal it, preventing liquid oxygen from entering the hollow rod 805. The upper end of the infusion tube 5 passes through the transition hole 807, the transition air passage 806 and the exhaust pipe 6 to reach the ground, and a quick connector for the main pipe is reserved.

[0041] After the detonation wire 9 is led out from the ignition device 3, it passes through the hollow rod 805, through the transition hole 807 and the transition air passage 806, and then enters the exhaust pipe 6 and emerges from the ground at the top of the exhaust pipe 6.

[0042] During assembly, the orifice frame 12, retaining plate 8, sealing seat 801, and excitation device 3 are first assembled into the first component. The absorber 2 is then fitted onto the lower extension rod 401, and the liquid storage 1 is fitted onto it. The upper end of the liquid storage 1 is then bonded to the base plate 4 to form the second component. Subsequently, the lower end of the hollow rod 805 with the excitation device 3 installed is inserted through the hollow hole 402. The sealing seat 801 has a threaded flange, and is connected to the base plate 4 by threads at the hollow hole 402. The first and second components are then assembled.

[0043] Since the depth of the blast hole 7 varies randomly depending on the site conditions, if the blast hole 7 is shallow, the overburden layer 10 may not be deep enough. During blasting, the overburden layer 10 may be easily blown away, and the impact strength on the underlying rock may not be achieved.

[0044] In the preferred embodiment, the exhaust pipe 6 is slidably sleeved with the retaining plate 8. The lower end of the retaining plate 8 is provided with multiple guide blocks 803 along the circumference. The guide blocks 803 are provided with arc-shaped guide grooves 804. The lower end of the arc-shaped guide grooves 804 faces the sealing seat 801, and the upper end of the arc-shaped guide grooves 804 faces the inner wall of the blast hole 7. The upper end of the sealing seat 801 is provided with multiple deformable anchors 802 along the circumference. The upper end of the anchors 802 is inserted into the arc-shaped guide grooves 804. The hollow rod 805 is also fitted with a slidable floating sleeve 809. The upper end of the floating sleeve 809 is provided with a hole plug 810. A connecting air hole 811 is provided between the transition air passage 806 and the inner cavity of the liquid storage 1. The hole plug 810 is used to seal the connecting air hole 811.

[0045] Initially, the anchor 802 is bent within the arc-shaped guide groove 804. Due to the light weight of the second component, it can support the substrate 4 and other components below. The tip of the anchor 802 extends in a straight line and is equipped with a stud section that can be screwed into the deformable end of the arc-shaped guide groove 804. Made of a high-hardness material, it is not easily deformed. Therefore, even after liquid oxygen is filled and the second component becomes heavier, the anchor 802 will not come out of the arc-shaped guide groove 804.

[0046] A limiting groove 813 is provided at the joint between the hollow rod 805 and the closed seat 801. Initially, at the lower end of the displacement limiting groove 813 of the float sleeve 809, the fine-diameter guide rod 812 at the upper end of the plug 810 is in the connecting air hole 811. The diameter of the fine-diameter guide rod 812 is smaller than that of the connecting air hole 811, so it does not affect the ventilation.

[0047] As the liquid oxygen fills the tank, the float sleeve 809 floats up because its density is less than that of the liquid oxygen. At the same time, the residual air at the top is expelled. Under the guidance of the narrow-diameter guide rod 812, the plug 810 and the connecting vent 811 cooperate concentrically and seal the connecting vent 811 to prevent liquid oxygen from being sprayed out of the exhaust pipe 6 and wasted.

[0048] As liquid oxygen continues to be injected, if the stored liquid 1 is made of waterproof fabric, the originally wrinkled stored liquid 1 gradually recovers and expands until it contacts the inner wall of the blast hole 7. If the stored liquid 1 is at the bottom of the hole, it expands upwards. If the stored liquid 1 is not at the bottom of the hole, due to the greater contact friction between the stored liquid 1 and the blast hole 7, it will no longer move up and down along the blast hole 7, but rather the upper part will expand upwards and the lower part will expand downwards. In either case, the base plate 4 will be lifted up. The anchor 802 has a certain deformation capacity. The anchor 802 is inserted laterally into the inner wall of the blast hole 7 along the arc-shaped guide groove 804 to anchor, preventing the expansion force from exceeding the weight of the overburden layer 10 and causing the overburden layer 10 to be pushed out, until the base plate 4 rises close to the retaining plate 8 and is stopped.

[0049] If the sidewall of the blast hole 7 is a crushed rock structure, after the tip of the anchor 802 is embedded in the crushed rock gap, the rear end is curled and deformed under the pressure of the base plate 4. The elastic force formed by the curling makes the tip of the anchor 802 continuously embedded in the sidewall of the blast hole 7, and the curled structure itself will also form a friction and hook structure when in contact with the sidewall of the blast hole 7, ensuring that the retaining plate 8 is firmly fixed to the sidewall of the blast hole 7.

[0050] In the preferred embodiment, an indicator sleeve 13 is provided at the upper end of the exhaust pipe 6.

[0051] The indicator sleeve 13 is colored. When the base plate 4 rises, the indicator sleeve 13 at the top of the exhaust pipe 6 rises simultaneously. When the indicator sleeve 13 stops rising, the detonation personnel at a distance observe this and stop pumping liquid oxygen.

[0052] Example 2:

[0053] A device for detonation-induced liquefied air phase change rock breaking includes a storage pipe installed inside a blast hole. The storage pipe is connected to an external liquefied air tanker or Dewar flask via a delivery pipe, and the liquefied air tanker or Dewar flask injects liquefied air into the storage pipe through the delivery pipe. Preferably, the storage pipe is made of flexible PE material with a thickness of not less than 0.2 mm; the delivery pipe is made of aluminum alloy.

[0054] The top of the liquid storage pipe is covered with soil.

[0055] The infusion tubing is connected to a grounding rod via a connecting wire, which is buried in the undisturbed soil near the blast hole. Preferably, the grounding wire is made of copper, and the grounding rod is made of tin-plated copper to reduce grounding resistance and quickly conduct static electricity generated by friction in the infusion tubing into the ground.

[0056] The liquid storage pipe is connected to the outside air through an exhaust pipe to ensure pressure balance inside and outside the liquid storage pipe. Preferably, the exhaust pipe is made of PU material.

[0057] The storage tube contains an absorbent body, which is a hollow cylinder. The infusion tube passes through the hollow part of the absorbent body to the bottom of the storage tube; the absorbent body is immersed in liquefied air. Preferably, the absorbent body is made of a fluffy fibrous material with high calorific value and easy combustion.

[0058] The liquid storage tube is equipped with a detonation activation device, which consists of emulsion explosive, electronic detonator, and fuse.

[0059] The emulsion explosive and electronic detonator are housed within an inner insulating layer, which is surrounded by an outer insulating layer. The outer insulating layer is in contact with liquid air, and both the inner and outer insulating layers are filled with an insulating layer. Preferably, the emulsion explosive is low-temperature resistant and contains antifreeze, the electronic detonator uses low-temperature resistant electronic components, the inner and outer insulating layers are made of PE material, and the insulating layer is made of polyurethane foam.

[0060] The lead wire passes sequentially through the inner isolation layer, the insulation layer, the outer isolation layer, the absorber, the liquid storage pipe, and the covering soil to connect with the external detonator and receive the detonator's command.

[0061] The electronic detonator is connected to an external detonator via a lead wire. The energy provided by the detonator activates the electronic detonator, detonating the emulsion explosive.

[0062] A method for detonation-induced liquefied air phase change rock breaking, applied to a liquefied air phase change rock breaking device, includes the following steps:

[0063] S1. Calculate the thickness of the cover soil and the height of the liquid storage pipe based on the depth of the blast hole. The preferred cover soil thickness is controlled at 3~4m.

[0064] S2. Calculate the volume of liquid air inside the storage pipe based on its height and inner diameter. Assuming a bedrock thickness of 12m, a blast hole depth of 13m and a diameter of 90mm, a storage pipe height of 10m and an inner diameter of 70mm, the preferred liquid air is pure liquid oxygen.

[0065] S3. Calculate the gas density and expansion factor n1 at the boiling point temperature under standard atmospheric pressure based on the volume of liquid air. Preferably, the expansion factor of liquid oxygen is 264.

[0066] S4. Calculate the volume expansion factor n2 of gaseous air at room temperature and pressure, and the total expansion factor n3 of liquefied air after vaporization into gas at room temperature and pressure. Preferably, the expansion factor of liquid oxygen is 860.

[0067] S5. Calculate the mass of liquid air based on the volume of liquid air in the storage tube, and calculate the heat Q1 absorbed when the temperature rises to the boiling point at standard atmospheric pressure from -185°C to -183°C based on the mass of liquid air. The heat absorbed by 22kg of liquid oxygen is 74.65kJ.

[0068] S6. Calculate the heat Q2 absorbed by liquefied air during vaporization at a constant temperature under standard atmospheric pressure. Liquid oxygen absorbs 4676.50 kJ of heat during vaporization at standard atmospheric pressure and -183°C.

[0069] S7. Calculate the heat Q3 absorbed by vaporized air when heated from its boiling point to room temperature under standard atmospheric pressure. Liquid oxygen absorbs 4201.39 kJ of heat when heated from -183°C to room temperature (25°C) under standard atmospheric pressure.

[0070] S8. Calculate the amount of emulsion explosive needed based on the total heat absorbed when liquefied air vaporizes into a gas at room temperature under standard atmospheric pressure. Under standard atmospheric pressure, liquid oxygen vaporizes from -185°C to 25°C, absorbing a total of 8952.54 kJ of heat. Half of this heat is provided by the heat generated by the explosive, requiring 1.21 kg of emulsion explosive.

[0071] S9. After assembling the liquid storage pipe, absorber, detonation activation device, lead wire, liquid delivery pipe and exhaust pipe, put them into the blast hole.

[0072] S10. Cover and seal the liquid storage pipe with soil, and install connecting wires and grounding rods to ensure proper grounding of the infusion pipe.

[0073] S11. The electronic detonator is activated by the aerator, which detonates the emulsion explosive. The large amount of heat generated triggers a phase change in the liquid air, and the volume and pressure increase dramatically due to the phase change completes the rock breaking.

[0074] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A detonation-induced phase change rock-breaking device, characterized in that: It includes a liquid storage (1) set in the blast hole (7), the liquid storage (1) is expandable, a soil cover layer (10) is provided above the liquid storage (1) in the blast hole (7), an absorber (2) and an activation device (3) are provided in the liquid storage (1), an electronic detonator (301) and an emulsion explosive (302) are provided in the activation device (3), the electronic detonator (301) is provided with a detonating wire (9) extending out of the blast hole (7), and a liquid delivery pipe (5) and an exhaust pipe (6) are also provided. The lower end of the liquid delivery pipe (5) is inserted into the lower end of the liquid storage (1), and the lower end of the exhaust pipe (6) is connected to the upper end of the liquid storage (1). A liquid phase-change oxidizer (14) is injected into the absorber (2) through the liquid delivery pipe (5), and the absorber (2) absorbs the oxidizer (14).

2. The detonation-induced phase change rock-breaking device according to claim 1, characterized in that: The absorber (2) is a hollow cylindrical structure and is sleeved on the outside of the infusion tube (5). The absorber (2) has a porous fibrous outer layer.

3. The detonation-induced phase change rock-breaking device according to claim 1, characterized in that: The infusion tube (5) is made of conductive material. One end of the infusion tube (5) extending out of the rupture hole (7) is wrapped with a grounding wire (1101). The end of the grounding wire (1101) is provided with a grounding rod (11), which is inserted into the ground.

4. The detonation-induced phase change rock-breaking device according to claim 1, characterized in that: The combustion accelerant (14) is liquid oxygen or liquid air.

5. The detonation-induced phase change rock-breaking device according to claim 1, characterized in that: It also includes a hole frame (12), with a retaining plate (8) at the lower end of the hole frame (12), the upper end of the liquid storage (1) is connected to the retaining plate (8), and the soil layer (10) covers the top of the retaining plate (8).

6. The detonation-induced phase change rock-breaking device according to claim 5, characterized in that: The liquid storage (1) has an opening at the top and a base plate (4) is provided at the opening. Multiple downward extension rods (401) are provided at the bottom of the base plate (4) along the circumference. The absorber (2) is sleeved on the downward extension rods (401). The base plate (4) has a hollow hole (402) in the center. A sealing seat (801) is provided at the hollow hole (402). The upper end of the sealing seat (801) is connected to the retaining plate (8). The exhaust pipe (6) passes through the retaining plate (8) so that the lower end is connected to the sealing seat (801). The lower end of the sealing seat (801) is provided with a hollow rod (805). The excitation device (3) is sleeved on the hollow rod (805). The sealing seat (801) is also provided with a transition air passage (806). The upper and lower ends of the transition air passage (806) are connected to the exhaust pipe (6) and the liquid storage (1) respectively. The infusion pipe (5) and the detonation wire (9) are located inside the exhaust pipe (6).

7. The detonation-induced phase change rock-breaking device according to claim 6, characterized in that: The exhaust pipe (6) is slidably sleeved with the retaining plate (8). The lower end of the retaining plate (8) is provided with multiple guide blocks (803) along the circumference. The guide blocks (803) are provided with arc-shaped guide grooves (804). The lower end of the arc-shaped guide grooves (804) faces the sealing seat (801), and the upper end of the arc-shaped guide grooves (804) faces the inner wall of the blast hole (7). The upper end of the sealing seat (801) is provided with multiple deformable anchors (802) along the circumference. The upper end of the anchors (802) is inserted into the arc-shaped guide grooves (804). A slidable floating sleeve (809) is also sleeved on the hollow rod (805). The upper end of the floating sleeve (809) is provided with a hole plug (810). A connecting air hole (811) is provided between the transition air passage (806) and the inner cavity of the liquid storage (1). The hole plug (810) is used to seal the connecting air hole (811).

8. The detonation-induced phase change rock-breaking device according to claim 7, characterized in that: An indicator sleeve (13) is provided at the upper end of the exhaust pipe (6).

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