Explosion damping device and method based on supercritical CO2

Abstract

The invention discloses a blasting damping device and method based on supercritical CO2, belongs to the technical field of underwater blasting construction, and solves the problem that impact waves seriously influence the surrounding environment during underwater blasting construction in the prior art. The blasting damping device comprises a filling head, the end of the filling head is connected with a liquid storage tank, and the end, away from the filling head, of the liquid storage tank is connected with a release head; a heating pipe is arranged in the liquid storage tank, and an activating agent is filled in the heating pipe; the liquid storage tank is filled with supercritical carbon dioxide. According to the device, an activating agent in the heating pipe is heated to release heat, supercritical carbon dioxide in the liquid storage tank is changed into gas carbon dioxide through the heat, the air pressure in the liquid storage tank rises instantly, the gas carbon dioxide rushes out of the release head to be released, and a large number of carbon dioxide bubbles are formed; the carbon dioxide bubbles form a bubble curtain underwater, the bubble curtain can buffer shock waves generated by explosive explosion, and a good protection effect on surrounding building facilities is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater blasting construction, and particularly relates to a blasting vibration damping device and method based on supercritical CO 2 . Background Art

[0002] In the fields of port construction, bridge foundation construction, etc., underwater blasting technology is used. At present, conventional emulsion explosives are used for drilling and blasting in underwater blasting technology, and the crushing of media such as rocks is achieved by reasonably designing drilling parameters, charge amounts, and initiation sequences, etc., to meet various engineering requirements such as channel dredging, water conservancy project construction, and underwater foundation excavation.

[0003] However, underwater blasting operations will generate vibration waves, which will have an adverse impact on the surrounding environment; for example, when carrying out underwater blasting construction in areas with buildings such as near residential areas and commercial areas, the powerful stress waves and shock waves generated by the blasting of emulsion explosives will spread to the surrounding water bodies and strata, resulting in different degrees of vibration effects on distant buildings such as houses.

[0004] Common underwater blasting vibration damping methods in the prior art mainly include the following several types:

[0005] Setting vibration damping holes: A certain number, spacing, and depth of holes are drilled in the rocks or soils around the blasting area in advance, and the vibration intensity is reduced by changing the stress wave propagation path and absorbing and reflecting part of the energy. However, the drilling operation is difficult to operate underwater, with low efficiency, and is significantly affected by underwater geological conditions. In some hard rock areas, the drilling cost is high and time-consuming.

[0006] Using flexible protection materials: Flexible materials such as rubber and foam are laid between the blasting point and the object to be protected, and the vibration wave energy is absorbed by the buffering performance of the materials. However, it is difficult to lay and fix the materials in a complex underwater environment, and the cost is relatively high. The vibration damping effect for high-intensity and large-scale blasting is limited.

[0007] Bubble curtain protection technology: Through an underwater bubble generating device, gas is injected into the water to form a bubble curtain to block and weaken the propagation of vibration waves. However, this method requires additional complex gas generation, transportation, and gas distribution systems, and it is difficult to accurately control the gas generation amount, distribution uniformity, etc. of the bubbles, affecting the stability of the vibration damping effect.

[0008] Therefore, the actual use effects of the blasting vibration damping methods in the prior art are not good and the costs are relatively high; in some environments with relatively strict vibration requirements, it is still difficult to effectively control the vibration impact at a low level and cannot play a good protective role for the surrounding environment of the explosion area. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the present invention provides a supercritical CO 2 The blasting shock absorbing device and method solve the problem in the prior art that the shock wave has a serious impact on the surrounding environment during underwater blasting construction.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A supercritical CO 2 The blasting shock absorbing device comprises a filling head, the end of the filling head is connected to a liquid storage tank, and the end of the liquid storage tank away from the filling head is connected to a release head; a heating tube is arranged inside the liquid storage tank, and an activator is filled in the heating tube; and supercritical carbon dioxide is filled inside the liquid storage tank.

[0012] In this solution, the activator in the heating tube releases heat after being heated, and the heat causes the supercritical carbon dioxide in the storage tank to gasify and expand rapidly, causing the pressure in the storage tank to quickly rise to the critical value in a very short time. Finally, the carbon dioxide gas in the storage tank is released from the release head to form a large number of carbon dioxide bubbles; the carbon dioxide bubbles form a bubble curtain underwater, which can buffer the shock wave generated by the explosion of explosives and provide good protection for surrounding buildings and facilities.

[0013] Furthermore, an isolation plate is arranged between the filling head and the liquid storage tank; a plurality of air holes are opened around the isolation plate, and the plurality of air holes are connected with an annular cavity opened in the filling head; the annular cavity is connected to one end of the inflation tube, and the other end of the inflation tube passes through the filling head and is connected to the one-way filling valve.

[0014] In this solution, supercritical carbon dioxide can be poured into the filling head through a one-way filling valve and enter the interior of the liquid storage tank through the air holes. The annular cavity is designed to divert the supercritical carbon dioxide into several paths that can pass through several air holes, thereby achieving rapid filling of supercritical carbon dioxide.

[0015] Furthermore, a through hole is opened in the middle of the isolation plate, and the nozzle of the heating tube passes through the through hole; a heating resistor is arranged inside the heating tube, and the power line of the heating resistor extends into the filling head along the nozzle of the heating tube and is electrically connected to the timing control system arranged inside the filling head.

[0016] In this solution, the timing control system controls the heating resistor to heat the activator in a timely manner. After the activator is heated, a large amount of heat is released, and the heat is transferred to the supercritical carbon dioxide in the liquid storage tube closely connected to it, so that the supercritical carbon dioxide in the liquid storage tank is rapidly vaporized.

[0017] Furthermore, a rubber plug is provided at the pipe opening of the heating pipe.

[0018] Further, an energy-dissipating sheet is provided between the liquid storage tank and the release head; an energy-dissipating channel is formed in the release head, and one end of the energy-dissipating channel close to the liquid storage tank is blocked by the energy-dissipating sheet; the other end of the energy-dissipating channel is branched into two paths and respectively communicated with two release holes, and the two release holes are respectively formed on both sides of the release head along the diagonal line.

[0019] In this solution, under the heating of the activator, the pressure of the gaseous carbon dioxide in the liquid storage pipe instantaneously increases. When the pressure reaches the limit pressure that the energy-dissipating sheet can bear, the energy-dissipating sheet is broken through, and the high-pressure gaseous carbon dioxide will quickly be released to the outside through the two release holes, forming a bubble curtain on both sides of the release head; when the stress wave and shock wave generated by the blasting of the emulsion explosive propagate outward, the previously formed carbon dioxide bubble curtain can effectively disperse, buffer and absorb part of the energy, thereby significantly reducing the propagation of the shock wave.

[0020] Further, the activator is potassium perchlorate.

[0021] Second, based on the blasting shock absorption device based on supercritical CO 2 provided in the first aspect, the present invention provides a blasting shock absorption method based on supercritical CO2, including the following steps:

[0022] S1. Survey the surrounding environment of the blasting area and determine the distribution positions of the blasting shock absorption devices;

[0023] Before carrying out the underwater blasting project, conduct a detailed geological and hydrological survey on the blasting area and the surrounding environment to determine the positions, distances of the structures to be protected, and the underwater topography and landforms, etc.; according to this information, reasonably arrange the positions and quantities of the blasting shock absorption devices, so that the blasting shock absorption devices can separate the blasting area from the surrounding buildings, and ensure that the bubble curtain generated by the blasting shock absorption devices can effectively block the main vibration propagation paths, thereby protecting the safety of the surrounding building areas.

[0024] S2. Install the blasting shock absorption devices and explosives;

[0025] S3. Detonate the blasting shock absorption devices first, and then detonate the explosives.

[0026] In this solution, the explosives are isolated from the surrounding areas to be protected by the installed blasting shock absorption devices. During blasting, the blasting shock absorption devices are detonated first. The supercritical carbon dioxide in the blasting shock absorption devices quickly vaporizes, generating a large amount of carbon dioxide gas and discharging from the release holes to form a bubble curtain; then the explosives are detonated. The previously formed bubble curtain can block and buffer the shock wave generated by the explosion, thereby achieving a shock absorption effect and effectively avoiding affecting the surrounding areas of the explosion.

[0027] Further, in S2, the blasting shock absorption devices are arranged in rows;

[0028] The release holes of the release heads in two adjacent blasting shock-absorbing devices in each row are arranged oppositely.

[0029] In this solution, when blasting, each blasting shock-absorbing device releases carbon dioxide bubbles along the row direction, forming a whole row of buffer layers, which can block the shock wave generated by the explosion in a large range and has a good protection effect on surrounding buildings.

[0030] Furthermore, S3 includes:

[0031] S301. Determine the interval time T between the blasting shock-absorbing device and the initiation of the explosive:

[0032] T = t 1 + t 2

[0033] Wherein, t 1 is the time for carbon dioxide to change from the supercritical state to the gaseous state, and t 2 is the time for the bubble to rise in water;

[0034] S302. Initiate the blasting shock-absorbing device, and the carbon dioxide in the blasting shock-absorbing device changes from the supercritical state to the gaseous state;

[0035] S303. After waiting for the interval time T, the carbon dioxide gas forms a bubble curtain, and then initiate the explosive.

[0036] In this solution, after the blasting shock-absorbing device is started, the carbon dioxide inside it changes from the supercritical state to the gaseous state to generate bubbles, and the total time for the bubbles to rise in water to form a bubble curtain is T, that is, it is necessary to wait for the interval time T when initiating the explosive to ensure that the bubble curtain has been completely formed before the explosion.

[0037] Furthermore, determine the time t for the bubble to rise in water 2 :

[0038]

[0039] Wherein, h is the depth of the blasting shock-absorbing device from the water surface, V t is the rising speed of the bubble in water, g is the acceleration due to gravity, R is the radius of the bubble, ρ 水 and ρ 气 are the densities of water and carbon dioxide respectively.

[0040] The beneficial effects of the present invention are:

[0041] The blasting shock-absorbing device based on supercritical CO 2 provided by the present invention is through the coupled blasting of supercritical CO 2 and ordinary explosives, and with the help of supercritical CO 2The buffering effect of carbon dioxide bubbles generated by premature detonation can effectively weaken the blasting vibration intensity received by buildings such as distant buildings during blasting, with a significant vibration reduction effect, greatly improving the safety and feasibility of blasting construction in the area near buildings. Supercritical CO 2 The carbon dioxide gas generated after blasting will eventually dissolve into the water body or diffuse into the atmosphere. Compared with some traditional vibration reduction measures, such as setting a large number of vibration reduction trenches, which may involve earthwork excavation and subsequent environmental restoration, this solution has less impact on the surrounding environment and conforms to the development concept of green construction and environmental protection construction.

[0042] The blasting vibration reduction method provided by the present invention based on supercritical CO 2 can be realized on the basis of the existing underwater drilling blasting construction technology. Only by reasonably arranging the position, filling, and detonation sequence of supercritical CO 2 , etc., no complex additional large equipment or special construction conditions are required. The construction operation is relatively simple and is easy to be mastered and implemented by operators familiar with conventional blasting construction, and has good popularization and application prospects. Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of a blasting vibration reduction device based on supercritical CO 2 ;

[0044] Figure 2 is a schematic cross-sectional structural diagram of a blasting vibration reduction device based on supercritical CO 2 ;

[0045] Figure 3 is Figure 1 an enlarged view of the filling head part in

[0046] Figure 4 is a schematic structural diagram of a heating tube and an isolation sheet;

[0047] Figure 5 is a schematic structural diagram of a liquid storage tank;

[0048] Figure 6 is a schematic diagram of the distribution of the blasting vibration reduction device and explosives in Example 2;

[0049] Figure 7 is a schematic diagram of the orientation of the release holes of the blasting vibration reduction device in Example 2;

[0050] Figure 8 is a schematic structural diagram of the distribution of the blasting vibration reduction device and explosives in Example 3.

[0051] Reference Signs:

[0052] 1. Filling head; 11. Annular cavity; 12. Filling pipe; 13. Unidirectional filling valve; 2. Liquid storage tank; 3. Release head; 31. Energy release channel; 32. Release hole; 33. Energy release piece; 4. Heating tube; 41. Heating resistor; 5. Isolation piece; 51. Vent hole; 52. Through hole; 53. Rubber plug; 6. Blasting shock absorption device; 7. Explosive Specific embodiments

[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following describes the specific embodiments of the present invention to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0054] Embodiment 1

[0055] As Figure 1 - Figure 2 shown, this embodiment provides a blasting shock absorption device based on supercritical CO 2 . The blasting shock absorption device forms a bubble curtain by the CO 2 gas generated after blasting supercritical CO 2 rising in water. The bubble curtain can block the shock wave generated by the explosion, thereby effectively protecting the structures in the underwater and surrounding environments from the influence of blasting vibration. Specifically, it includes:

[0056] A filling head 1, a liquid storage tank 2, a release head 3 and a heating tube 4;

[0057] Among them, the end of the filling head 1 is connected to the liquid storage tank 2, and the end of the liquid storage tank 2 away from the filling head 1 is connected to the release head 3; a heating tube 4 is arranged inside the liquid storage tank 2, and an activator is filled in the heating tube 4; supercritical carbon dioxide is filled inside the liquid storage tank 2. The activator in the heating tube 4 releases heat after being heated, and the heat causes the supercritical carbon dioxide in the liquid storage tank 2 to quickly gasify and expand. The pressure inside the liquid storage tank 2 rapidly rises to the critical value in a very short time, and finally the generated carbon dioxide gas rushes out from the release head 3 for release, forming a large number of carbon dioxide bubbles; the carbon dioxide bubbles form a bubble curtain underwater, and the bubble curtain can buffer the shock wave generated by the explosive explosion and play a good protective role for the surrounding building facilities.

[0058] As Figure 3 - Figure 5As shown in the figure, a separator 5 is provided between the filling head 1 and the liquid storage tank 2; a plurality of ventilation holes 51 are provided around the separator 5, and the plurality of ventilation holes 51 communicate with an annular cavity 11 provided in the filling head 1; one end of a filling pipe 12 is connected to the annular cavity 11, and the other end of the filling pipe 12 passes through the filling head 1 and is connected to a one-way filling valve 13. Supercritical carbon dioxide can be filled into the filling head 1 through the one-way filling valve 13 and enter the interior of the liquid storage tank 2 through the ventilation holes 51; by designing the annular cavity 11, the supercritical carbon dioxide can be divided into several paths that can pass through the plurality of ventilation holes 51, realizing the rapid filling of supercritical carbon dioxide.

[0059] A through hole 52 is provided in the middle of the separator 5; the pipe orifice of a heating tube 4 penetrates through the through hole 52; a heating resistor 41 is provided inside the heating tube 4, and the power supply wire of the heating resistor 41 extends into the filling head 1 along the pipe orifice of the heating tube 4 and is electrically connected to a timing control system provided inside the filling head 1. The timing control system controls the heating resistor 41 to heat the activator at regular intervals. After the activator is heated, a large amount of heat is released, and the heat will be transferred to the supercritical carbon dioxide in the liquid storage pipe that is closely connected to it, causing the supercritical carbon dioxide in the liquid storage tank 2 to quickly vaporize.

[0060] A rubber plug 53 is provided at the pipe orifice of the heating tube 4.

[0061] A pressure relief sheet 33 is provided between the liquid storage tank 2 and the release head 3; a pressure relief channel 31 is provided in the release head 3, and one end of the pressure relief channel 31 close to the liquid storage tank 2 is blocked by the pressure relief sheet 33; the other end of the pressure relief channel 31 is divided into two paths and respectively communicated with two release holes 32, and the two release holes 32 are respectively provided on both sides of the release head 3 along the diagonal. After the activator is heated, the pressure of the gaseous carbon dioxide in the liquid storage pipe instantaneously increases. When the pressure reaches the limit pressure that the pressure relief sheet 33 can withstand, the pressure relief sheet 33 is broken through, and the high-pressure gaseous carbon dioxide will quickly be released to the outside through the two release holes 32, forming a bubble curtain on both sides of the release head 3; when the stress wave and shock wave generated by the detonation of the emulsion explosive propagate outward, the previously formed carbon dioxide bubble curtain can effectively disperse, buffer and absorb part of the energy, thus significantly reducing the propagation of the shock wave.

[0062] Internal threads are tapped at both ends of the liquid storage tank 2, and external threads are tapped at the connection heads of the filling head 1 and the release head 3. The filling head 1 and the release head 3 are threadedly connected to both ends of the liquid storage tank 2.

[0063] Preferably in this embodiment, the activator is potassium perchlorate.

[0064] Preferably in this embodiment, the material of the pressure relief sheet is Q235 steel.

[0065] Preferably in this embodiment, the explosive can be an ordinary emulsion explosive.

[0066] Example 2

[0067] This embodiment is based on a supercritical CO 2 The blasting shock absorption device provides a supercritical CO 2 A blasting shock reduction method; in the blasting shock reduction method, the explosives and the surrounding area to be protected are isolated by the deployed blasting shock reduction device 6, and the blasting shock reduction device is first detonated during blasting, and the supercritical carbon dioxide in the blasting shock reduction device is rapidly gasified to generate a large amount of carbon dioxide gas and discharged from the release hole to form a bubble curtain; the explosive is then detonated, and the bubble curtain formed first can block and buffer the shock wave generated by the explosion, thereby achieving a shock reduction effect.

[0068] The blasting shock reduction method specifically comprises the following steps:

[0069] S1, survey the surrounding environment of the blasting area and determine the distribution position of the blasting shock absorbing device 6, such as Figure 6 As shown;

[0070] Before carrying out underwater blasting projects, a detailed geological and hydrological survey is conducted on the blasting area and surrounding environment to determine the location and distance of the structures that need to be protected, as well as information such as the underwater topography and landforms; based on this information, the location and number of the blasting shock-absorbing devices 6 are reasonably arranged so that the blasting shock-absorbing devices 6 can separate the blasting area from the surrounding buildings, ensuring that the bubble curtain generated by the blasting shock-absorbing devices 6 can effectively block the main vibration propagation path, thereby protecting the safety of the surrounding building areas.

[0071] S2, laying out blasting shock absorbing device 6 and explosives 7;

[0072] like Figure 7 As shown, the blasting shock absorbing devices 6 are arranged in rows, and the release holes of the release heads 3 in two adjacent blasting shock absorbing devices 6 in each row are arranged opposite to each other. In this arrangement, when blasting, each blasting shock absorbing device 6 releases carbon dioxide bubbles along the direction of the row to form a buffer layer of a whole row, which can block the shock wave generated by the explosion in a large range and has a good protective effect on surrounding buildings.

[0073] S3, first detonating the blasting damping device 6, and then detonating the explosive 7; specifically including:

[0074] S301, determine the interval time T between the detonation of the blasting shock absorbing device 6 and the explosive 7:

[0075] T=t 1 +t 2

[0076] Among them, t 1 is the time it takes for carbon dioxide to change from supercritical state to gaseous state, t 2 is the rising time of bubbles in water;

[0077] The time t for carbon dioxide to change from the supercritical state to the gaseous state 1 It is divided into three stages. The first stage is the time required for carbon dioxide to change from the supercritical state to gas, and this stage time is relatively fixed, about 2 ms; the second stage is the stage where carbon dioxide gas expands and does work, and this stage time is greatly affected by the structure of the release head 3. Different shapes of the release holes 32 and different hole sizes will all have an impact. Taking the double release holes in Example 1 as an example, according to the test results, the time used in this stage is about 10 ms; the third stage is the bubble generation stage. According to existing experimental reports, in the normal temperature water body environment, the time for bubble generation is about 15 ms. Therefore, in this embodiment, the time t for carbon dioxide to change from the supercritical state to the gaseous state 1 is the total time of the three stages, that is, 27 ms; therefore, the detonation time of the ordinary explosive 7 needs to be later than this time.

[0078] It is determined as the time t for the bubble to rise in water 2 :

[0079]

[0080]

[0081] Among them, h is the depth of the blasting vibration reduction device from the water surface, V t is the rising speed of the bubble in water, g is the acceleration due to gravity, R is the bubble radius, ρ 水 and ρ 气 are the densities of water and carbon dioxide respectively;

[0082] In this embodiment, the depth h of the blasting vibration reduction device 6 from the water surface is about 5 m; the bubble radius generated by underwater carbon dioxide blasting is generally between a few millimeters and dozens of millimeters, and the larger the bubble, the faster it rises. Therefore, the maximum time for a bubble with a radius of 4 mm to rise to the water surface in an ideal state is 17.857 s; the time required for a bubble with a radius of 20 mm to rise to 1 m from the river surface in an ideal state is 6.400 s. Therefore, the time t for the bubble to rise in water 2 is about 6.400 s - 17.857 s;

[0083] S302. Detonate the blasting vibration reduction device 6, and the carbon dioxide in the blasting vibration reduction device 6 changes from the supercritical state to the gaseous state;

[0084] S303. The carbon dioxide inside the blasting vibration reduction device 6 changes from the supercritical state to the gaseous state to generate bubbles, and the total time for the bubbles to rise in water to form a bubble curtain is T, that is, an interval time T needs to be waited when detonating the blasting vibration reduction device 6 and the explosive 7; wait until the carbon dioxide gas forms a bubble curtain, and then detonate the explosive 7 to ensure that the bubble curtain has been completely formed before the explosion.

[0085] Example 3

[0086] This example provides a method for arranging a blasting shock-absorbing device 6 and explosives 7 based on a blasting shock-absorbing method using supercritical CO 2 as provided in Example 2.

[0087] As Figure 8 shown, the blasting shock-absorbing device 6 is distributed around the explosives 7 to form a frame structure to surround the explosives 7; when carbon dioxide bubbles are released from the release holes of the release heads 3 in the blasting shock-absorbing device 6, the generated bubbles can quickly cover the entire blasting area and block the shock wave generated by the explosion in all directions.

[0088] Those of ordinary skill in the art will realize that the examples here are to help readers understand the principles of the present invention and should be understood that the protection scope of the present invention is not limited to such specific statements and examples. Those of ordinary skill in the art can make various other specific deformations and combinations without departing from the essence of the present invention based on these technical revelations disclosed in the present invention, and these deformations and combinations are still within the protection scope of the invention.

Claims

1. An explosion shock absorption device based on supercritical CO2, characterized in that: The invention comprises a filling head (1), the end of the filling head (1) is connected to a liquid storage tank (2), and the end of the liquid storage tank (2) away from the filling head (1) is connected to a release head (3); a heating tube (4) is arranged inside the liquid storage tank (2), and an activator is filled in the heating tube (4); and supercritical carbon dioxide is filled inside the liquid storage tank (2).

2. The explosion shock absorption device based on supercritical CO2 according to claim 1 is characterized in that: An isolation plate (5) is provided between the filling head (1) and the liquid storage tank (2); a plurality of air holes (51) are provided around the isolation plate (5), and the plurality of air holes (51) are communicated with an annular cavity (11) provided in the filling head (1); the annular cavity (11) is connected to one end of an air filling tube (12), and the other end of the air filling tube (12) passes through the filling head (1) and is connected to a one-way filling valve (13).

3. The explosion shock absorption device based on supercritical CO2 according to claim 2 is characterized in that: A through hole (52) is provided in the middle of the isolation sheet (5), and the nozzle of the heating tube (4) is arranged to pass through the through hole (52); a heating resistor (41) is arranged inside the heating tube (4), and a power line of the heating resistor (41) extends into the filling head (1) along the nozzle of the heating tube (4) and is electrically connected to a timing control system arranged inside the filling head (1).

4. The explosion shock absorption device based on supercritical CO2 according to claim 3 is characterized in that: A rubber plug (53) is provided at the pipe opening of the heating pipe (4).

5. The explosion shock absorption device based on supercritical CO2 according to claim 1 is characterized in that: An energy dissipation sheet (33) is provided between the liquid storage tank (2) and the release head (3); an energy dissipation channel (31) is provided in the release head (3); one end of the energy dissipation channel (31) close to the liquid storage tank (2) is blocked by the energy dissipation sheet (33); the other end of the energy dissipation channel (31) is split into two paths and respectively communicated with two release holes (32); the two release holes (32) are respectively provided on both sides of the release head (3) along the diagonal line.

6. The explosion shock absorption device based on supercritical CO2 according to any one of claims 1 to 5, characterized in that: The activator is potassium perchlorate.

7. An explosion shock reduction method based on the supercritical CO2 explosion shock reduction device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Survey the surrounding environment of the blasting area and determine the distribution location of the blasting shock absorption device; S2. Lay out blasting shock-absorbing devices and explosives; S3. Detonate the blasting shock absorber first, then detonate the explosive.

8. The blasting shock reduction method based on the supercritical CO2 blasting shock reduction device according to claim 7, characterized in that: In said S2, the blasting shock absorbing devices are arranged in rows; The release holes (32) of the release heads (3) in two adjacent blasting shock absorbing devices in each row are arranged opposite to each other.

9. The blasting shock reduction method based on the supercritical CO2 blasting shock reduction device according to claim 8, characterized in that: The S3 includes: S301, determine the interval time T between the blasting shock absorbing device and the detonation of the explosives: T=t1+t2 Among them, t1 is the time for carbon dioxide to change from supercritical state to gas state, and t2 is the time for bubbles to rise in water; S302, detonating the blasting shock-absorbing device, whereby the carbon dioxide in the blasting shock-absorbing device is converted from a supercritical state to a gaseous state; S303, after waiting for an interval of time T, the carbon dioxide gas forms a bubble curtain, and then the explosive is detonated.

10. The blasting shock reduction method based on the supercritical CO2 blasting shock reduction device according to claim 9, characterized in that: Determined as the rising time t2 of the bubble in water: Where h is the depth of the blasting shock absorber from the water surface, V t is the rising speed of the bubble in water, g is the acceleration due to gravity, R is the radius of the bubble, and ρ 水 and ρ 气 are the densities of water and carbon dioxide respectively.

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