CN117169014A - Simulation device and simulation method for coupled load of explosion near zone rock - Google Patents
Simulation device and simulation method for coupled load of explosion near zone rock Download PDFInfo
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- CN117169014A CN117169014A CN202311023847.7A CN202311023847A CN117169014A CN 117169014 A CN117169014 A CN 117169014A CN 202311023847 A CN202311023847 A CN 202311023847A CN 117169014 A CN117169014 A CN 117169014A
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- 238000004088 simulation Methods 0.000 title claims abstract description 23
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- 239000007789 gas Substances 0.000 claims description 75
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 19
- 239000013077 target material Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
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- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 229940116318 copper carbonate Drugs 0.000 claims description 2
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 claims description 2
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 claims description 2
- 235000019268 ferrous carbonate Nutrition 0.000 claims description 2
- 229960004652 ferrous carbonate Drugs 0.000 claims description 2
- 229910000015 iron(II) carbonate Inorganic materials 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
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- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The application discloses a simulation device for coupled load of explosion near-zone rock, which belongs to the field of explosion aerodynamics and comprises the following components: bullet firing means for firing secondary bullets into the target collision cell; the bullet target collision chamber comprises a bullet target collision chamber shell and a bullet target collision cavity, wherein the bullet target collision cavity comprises a target ring, a sample box, a high-temperature gas release element and a target to be detected, the high-temperature gas release element is fixed on the target ring, the sample box is installed inside the target ring, the sample box is provided with a hollow part, the target to be detected is accommodated in the hollow part, the high-temperature gas release element is positioned at the front end of the target to be detected, the high-temperature gas release element can release high-temperature gas to the secondary bullet after being impacted by the secondary bullet, and the recovery barrel device is positioned in the bullet target collision cavity and is used for recovering residues formed after the target to be detected is impacted.
Description
Technical Field
The application relates to the field of explosion impact dynamics, in particular to a simulation device and a simulation method for coupled load of near-explosion rock.
Background
The action of the rock subjected to coupling load in the near explosion area is one of important subjects in the fields of research of rock mechanics and rock explosion engineering. At the moment of detonation of the explosive, the blast shock wave propagates in the rock and causes cracking, deformation and breaking of the rock. In practice, in the near explosion zone, in addition to the direct action of the explosion wave, there are coupling loads caused by energy transfer and coupling effects, which are generated simultaneously by the explosion shock wave and the ultra-high temperature explosive gas, which have a significant influence on the mechanical properties and the destructive behavior of the rock.
During actual explosion, about 50% of the explosive energy of the borehole explosion process is dissipated in the excessive breaking of the rock in the blast comminution zone. Therefore, the research on the dynamic behavior of the rock in the blasting crushing area has important significance for reducing the cost and the emission of the drilling blasting engineering. However, the ultra-high stress (20-50 GPa) and high Wen Baosheng gas (2500-3500 ℃) in the blasting crushing area are crushed under the coupling effect, and the observation of rock crushing state and physical quantity under the combined effect of the ultra-high stress and the blasting gas is difficult to realize by the blasting field experiment and the conventional experimental means. At present, only a small amount of researches are carried out on loading rock by driving a flying piece through a light air gun to realize the loading state of ultra-high stress, or a mechanical method is adopted to generate high-temperature gas, but the temperature of the gas cannot reach 2500 ℃, and the coupling effect of two functions cannot be realized.
Disclosure of Invention
The application aims at solving the problems in the prior art and discloses a device for simulating coupled load of explosion near-zone rock, which comprises the following components:
bullet firing means for firing secondary bullets into the target collision cell;
the bullet target collision chamber comprises a bullet target collision chamber shell and a bullet target collision cavity, wherein the bullet target collision cavity comprises a target ring, a sample box, a high-temperature gas release element and a target material to be detected, the high-temperature gas release element is fixed on the target ring, the sample box is arranged inside the target ring, the sample box is provided with a hollow part, the target material to be detected is accommodated in the hollow part, the high-temperature gas release element is positioned at the front end of the target material to be detected, and the high-temperature gas release element can release high-temperature gas to a secondary bullet after being impacted by the secondary bullet; the target to be detected is rock medium including granite, sandstone, shale, etc. and may be changed based on the specific research object.
And the recycling bin device is positioned in the bullet target collision cavity and is used for recycling residues formed after the target to be detected is impacted.
In the preferred proposal, the high temperature gas release element is a blank body made of carbonate powder, and the carbonate is impacted by a secondary bullet to release the ultra-temperature gas.
In a preferred embodiment, the carbonate is selected from the group consisting of calcium carbonate, sodium carbonate, magnesium carbonate, potassium carbonate, sodium bicarbonate, ferrous carbonate, and copper carbonate.
In the preferred proposal, a sealing window is arranged on the shell of the bullet target collision chamber, the simulation device is provided with an observation device, the observation device observes the collision condition of the target to be detected through the sealing window,
in the preferred scheme, the bullet shooting device comprises a high-pressure air chamber, a pump pipe, a high-pressure cone section and a shooting gun pipe, wherein the high-pressure air chamber, the pump pipe, the high-pressure cone section and the shooting gun pipe are connected in sequence.
In a preferred embodiment, the high pressure chamber and the pump tube are filled with nitrogen and/or helium.
In a preferred embodiment, the high pressure chamber includes a sealed container, a thermal barrier, an air intake valve, a storage chamber, and an air outlet valve for storing and releasing compressed air to propel the primary bullet. The heat insulation layer contained in the high-pressure air chamber is used for coating the sealed container by adopting a heat insulation material, and the heat insulation layer can effectively reduce heat transmission, so that energy loss is reduced. The air inlet valve in the high-pressure air chamber is used for filling compressed air into the storage air chamber and mainly filling nitrogen; the storage air chamber in the high-pressure air chamber is used for hermetically storing compressed air in the storage air chamber, and rapidly releasing and pushing a first-stage bullet when the secondary light air cannon performs shooting operation; the high-pressure air chamber comprises a quick air outlet valve, the air outlet valve is connected with the storage air chamber and is used for controlling quick release of high-pressure compressed air so as to push the primary bullet to quickly move; the sealed container of the high-pressure air chamber is provided with a heat dissipation structure so as to control the temperature of the high-pressure air and reduce energy loss, store more compressed air and provide more stable driving force.
In a preferred scheme, the pump pipe is connected with a high-pressure air chamber, and the high-pressure air chamber can push the primary bullet to move in the pump pipe.
In a preferred embodiment, the nose section connects the pump tube with the barrel and pushes the secondary bullet (15) into motion.
In the preferred scheme, the first-level bullet include piston head section and piston tail section, wherein the piston head section is round platform form, and the piston tail section is dumbbell-shaped, and the piston tail end still is provided with the recess, the second-level bullet is cylindric, has the ladder type arch at its afterbody, guarantees to avoid entering the inside of launching tube before beginning at the test when installing the second-level bullet, and the inside round platform form recess that is provided with of second-level bullet 15 afterbody.
The application also discloses a simulation method of the coupled load of the explosion near zone rock, which adopts the simulation device and comprises the following steps:
s1, bonding a prefabricated high-temperature gas release element and a target to be detected, and aligning the high-temperature gas release element to a secondary bullet outlet of a gun-shooting tube;
s2: loading a first-stage bullet into one end of the injection inlet of the pump pipe, screwing the tail plug after the installation is finished, and confirming that the gas circuit is communicated with the tail channel of the piston;
s3: carrying out vacuumizing operation on the emission gun tube, the target chamber and the pump tube;
s4: after the vacuum degree is pumped to the specified vacuum degree, a valve connected with the end of the pump pipe is closed, a pump pipe air-filling valve is opened, and compressed gas is injected into the pump pipe to reach the expected value;
s5: experiments were performed.
The pump pipe 2, the high-pressure cone section 3 and the main body of the gun tube 4 are required to keep smooth performance, and certain lubricant is smeared on the inner surface, so that the friction force between the primary bullet 14 and the secondary bullet 15 and the pump pipe 2 is avoided, the speed of the firing is reduced, and the experimental result is influenced.
The rock medium in the near explosion area is subjected to the coupling action of explosion shock waves and explosion gas to generate crack gaps until the rock medium is broken. The application relates to a method for simulating the impact wave action of a rock medium in a near explosion zone, which is realized by adopting a second-level bullet in a second-level light air gun device to fly out of a gun tube at a high speed to strike the rock medium, and the impact wave simulation can bring high temperature and high pressure effects during the striking.
The application relates to a method for detecting the impact of a target material, which is characterized in that the impact of a carbonate substance on the rock medium in a near explosion zone is simulated by using the explosive gas action of the rock medium in the near explosion zone, carbonate powder is manufactured into a blank body, the blank body is arranged at one end of the target material to be detected, which is impacted by a sample, and the carbonate blank body is impacted and arranged on the target material to be detected by utilizing the characteristics of high temperature, high pressure and high impact speed at the moment of the impact of a secondary bullet, wherein the ultrahigh-temperature gas release is carried out at the moment of the impact of the carbonate substance on the target material to be detected.
The composite target to be detected of the carbonate embryo and the rock is subjected to high-speed impact of the secondary bullet in the secondary light gas gun, the generated impact wave is transmitted from the carbonate embryo into the target to be detected, the ultrahigh stress can be generated in the target to be detected, the carbonate embryo is changed into gas after impact and acts on the target to be detected together with the impact wave, and the impact crushing effect of the rock medium in the near explosion area caused by the coupling effect of the explosion impact wave and the explosion gas is simulated.
Controlling different shock wave pressures and shock wave speeds by controlling the speed of the secondary bullets striking the target to be detected; by controlling the porosity of the carbonate embryo, the carbonate embryo can release gases with different temperatures under the action of shock waves, so that the high-temperature gas action on rock mediums is realized.
The impact speed of the secondary bullet 15 of the secondary light air cannon can be selected according to the research purpose, and the speed of the secondary bullet 15 can reach 200-4000m/s by determining the weight of the secondary bullet 15, the thickness of a sealing membrane, the mass of the primary bullet 14 and the required air pressure, and injecting the air with the corresponding air pressure into the high-pressure air chamber 1 through the combination of a control system and an air supply system.
The application relates to a simulation device and a simulation method for coupled load of a rock in a near explosion zone, which can realize the simulation device for coupling effect of ultrahigh stress and ultrahigh temperature explosion gas on the rock in the near explosion zone, and provides a method for observing the coupling effect of the rock under the ultrahigh stress and ultrahigh temperature explosion gas in the simulation device, so that the behavior of a rock medium under the coupling load of the near explosion zone is researched, and the influence of the rock medium under the coupling load on the mechanical property and the damage mechanism of the rock can be further known.
Drawings
FIG. 1 is a schematic diagram of a high-speed impact loading device for a light air gun according to the present application
FIG. 2 is a schematic view of a collision cell of a projectile target according to the application
FIG. 3 is a schematic view of a target ring according to the present application
FIG. 4 is a schematic view of a primary bullet and a secondary bullet of the present application;
FIG. 5 is a schematic view of the installation of a target to be inspected and a high temperature gas release element inside a target chamber of the present application;
the marks in the figure: the device comprises a 1-high-pressure air chamber, a 2-pump pipe, a 3-high-pressure cone section, a 4-shooting gun pipe, a 5-bullet target collision chamber, a 6-detection device joint, a 7-shooting gun pipe outlet, an 8-device support, a 9-sealing window, a 10-bullet target collision chamber shell, a 11-detection device, a 12-observation device, a 13-target ring, a 14-primary bullet, a 15-secondary bullet, a 16-sample box, a 17-high-temperature gas release element, a 18-target to be detected and a 19-recycling bin device.
Detailed Description
The present application will be described in detail with reference to the accompanying drawings.
In this embodiment, the proximal end is set to be close to the end of the high-pressure air chamber, and the distal end is set to be far from the end of the high-pressure air chamber.
As shown in fig. 1, the simulation device for blasting coupled load of near-zone rock disclosed in this embodiment includes: the device comprises a secondary light gas gun, a bullet target collision chamber 5, a device bracket 8, a target ring 13, a sample box 16 and a high-temperature gas release element 17, wherein the secondary light gas gun is a driving and launching device for impacting a rock target, and is arranged at one end of a simulation device for blasting near-zone rock under coupled load, and the secondary light gas gun comprises: the high-pressure air chamber 1, the pump tube 2, the high-pressure cone section 3, the gun tube 4, the bullet target collision chamber 5, the primary bullet 14 and the secondary bullet 15, wherein the primary bullet 14 is arranged at the proximal end part of the pump tube 2, and the secondary bullet 15 is arranged at the proximal end part of the gun tube 4.
In the embodiment, the high-pressure air chamber 1 and the pump pipe 2 are filled with nitrogen and helium, and the gas filled by the quick-opening valve is utilized to quickly release and drive the primary bullet 14 and the secondary bullet 15 to move at high speed, so that the high temperature and the high pressure are brought by impacting the rock target.
In a preferred embodiment, the high-pressure air chamber 1 includes: the device comprises a sealed container, a heat insulating layer, an air inlet valve, a storage air cabin and an air outlet valve. The high pressure chamber 1 is mainly used for storing and releasing compressed gas to drive the firing of primary bullets 14, wherein the sealed container has high strength, compression resistance and corrosion resistance to withstand the high pressure compressed gas and prevent the compressed gas from leaking and damaging the chamber itself.
The pump tube 2 is connected to the high-pressure gas chamber 1 for the purpose of receiving and transmitting the pushing force of the high-pressure compressed gas released from the high-pressure gas chamber 1, and the high-pressure compressed gas released from the high-pressure gas chamber 1 pushes the primary bullet 14 in the pump tube 2 forward on the one hand and mixes a small amount of gas with the gas in the pump tube 2 forward on the other hand. In this embodiment, helium is filled in the pump tube 2 to increase the pressure of the compressed gas to increase the impact velocity of the secondary bullet 15.
As shown in fig. 4, the primary bullet 14 includes a piston head section and a piston tail section, wherein the piston head section is in a shape of a truncated cone, the piston tail section is in a dumbbell shape or a cylinder structure, and a concave part is formed in the center of the dumbbell shape, so that the weight of the primary bullet 14 can be reduced under the condition that the condition is met; the secondary bullet 15 is cylindrical, a step-shaped bulge is formed at the tail of the secondary bullet 15, the secondary bullet 15 is prevented from entering the launching tube before the beginning of the test when being installed, a groove is formed in the inner side of the head of the secondary bullet 15, a metal flying piece is installed in the groove, and the secondary bullet is made of light materials such as plastics.
As shown in fig. 1, the high-pressure cone section 3 connects the pump tube 2 and the barrel 4 to increase the driving force of the secondary bullet 15 to fly out at a high speed. The high-pressure cone segment 3 is internally provided with a metal sealing ring and a sealing diaphragm arranged on the metal sealing ring, wherein the sealing diaphragm is preferably made of stainless steel, and has the thickness of 0.1mm, 0.3mm or 0.5mm. The high pressure cone section 3 has an interior smaller size than the primary bullet 14 to prevent the primary bullet 14 from advancing. The high pressure cone section 3 comprises an air inlet connected to the pump tube 2 and an air outlet connected to the gun tube 4, the high pressure cone section 3 having a compression chamber for compressing the compressed gas from the high pressure gas chamber 1. The compression chamber of the high-pressure cone section 3 fully compresses a large amount of gas, and then the high-pressure compressed gas is released through breaking the sealing membrane to push the secondary bullet 15 in the gun barrel 4 to release.
The gun tube 4 is used for pushing gas to realize high-speed firing of the secondary bullets 15 in the gun tube, and the gun tube 4 is made of ultrahigh-pressure resistant materials and is provided with an air inlet end and an air outlet end. The air inlet end receives high-pressure gas from the high-pressure cone section 3 and transmits the high-pressure gas into the launching tube to push the secondary bullet 15 to be launched, and the secondary bullet 15 flying at high speed flies out from the air outlet end. The device of the application can enable the secondary bullet 15 to have higher firing speed and can meet the experimental requirements.
As shown in fig. 2, a target collision chamber 5 is shown, in the target collision chamber 5, a secondary bullet 15 flies out of a gun barrel 4 at a high speed and then hits a target 18 to be detected, and the target collision chamber 5 includes a target collision chamber housing 10, a device holder 8, a sealing window 9, a buffer device and a detecting device 11. The enclosure has high strength and protective capabilities to ensure adequate safety and control during an explosion; the device holder 8 is used for fixing the rock target to be detected and ensuring that it is correctly aligned with the centre of the firing barrel outlet 7 to receive the impact of the secondary bullet 15; the sealing window 9 is made of a transparent material with a certain impact resistance, and an observation device 12 (high-speed camera) can be arranged outside the sealing window 9 and used for recording and observing the high-speed process of the secondary bullet 15 impacting the target 18 to be detected and ensuring that gas does not leak or interfere with the impacting process. The cushioning means is located inside the collision cell, such as may be made of rubber layer material located within the target collision cell 5, to mitigate energy after impact of the secondary bullet 15, ensuring that the target collision cell 5 is protected from excessive damage. The detection device 11 is mounted in or near the bullet target collision cell 5 for recording and analyzing the dynamic mechanical response of the rock target during impact, which data can be used to evaluate the dynamic mechanical behavior and fragmentation characteristics of simulated rock in an explosive near zone environment.
The high temperature gas release element 17 in practical studies and experiments, researchers can determine appropriate reaction conditions according to experimental needs and purposes to obtain accurate and repeatable results. The calcium carbonate powder needs to be pre-pressed into a calcium carbonate blank to reach 30-80% of theoretical density, and can provide gas effects at different temperatures after being impacted at high speed, wherein the different densities and thicknesses of the pre-prepared calcium carbonate blank can lead to different provided gas contents and temperatures and different impact properties of the target 18 to be detected.
The carbonate powder is prefabricated into a blank before use, the carbonate blank and the target 18 to be detected are compacted, the compacted carbonate blank and the target 18 to be detected are placed into a sample box 16, after installation, the sample box 16 is fixed on an air gun support target ring 13 in a sealing mode, the target is prevented from being polluted, then a fly plate is adopted to strike at the impact speed of 200-4000m/s, ultra-high transient pressure is firstly generated and acts on rock, and then the carbonate releases ultra-high temperature gas to act on the rock, so that the simulation device for blasting near-zone rock under the coupling effect of ultra-high stress and ultra-high temperature blasting gas is realized. The application utilizes the gas released by the carbonate material after high-speed high-pressure high-temperature impact to simulate the explosive gas generated by the explosion load of rock mediums through the gas released by the carbonate material after high-speed impact.
The target ring 13 is mounted on the device holder 8 inside the bullet target collision chamber 5 and is fixed to the device holder 8. The target ring 13 is internally provided with a groove, the target ring 13 and the device bracket 8 are fixed by adopting screws of corresponding types through screw holes arranged on the device bracket 8, and the center of the mouth of the secondary light air gun launching gun barrel 4 and the center of the target ring 13 are required to be kept on the same straight line during the fixation. The size of the target 18 to be detected is consistent with the hollow ring part of the sample box 16, the size of the hollow part and the size of the target 18 to be detected can be designed according to research requirements, but the diameter of the inner ring is not larger than that of the inner bracket of the target ring 13. Since the sample cartridge 16 is mounted inside the target ring 13, the diameter of the sample cartridge 16 is required to be consistent with the inner diameter of the target ring 13.
The impact speed of the secondary bullet 15 of the secondary light air cannon can be selected according to the research purpose, and the speed of the secondary bullet 15 can reach 200-4000m/s by determining the weight of the secondary bullet 15, the thickness of a sealing membrane, the mass of the primary bullet 14 and the required air pressure, and injecting the air with the corresponding air pressure into the high-pressure air chamber 1 through the combination of a control system and an air supply system.
Preferably, the secondary bullet 15 impacts the sample box 16 at an impact speed of 200-4000m/s, and an ultra-high transient pressure is firstly generated at the moment of impact and acts on the carbonate, and then the carbonate releases ultra-high temperature gas to act on the target 18 to be detected, namely a simulation device for coupling ultra-high stress and ultra-high temperature explosion gas to the rock in the blasting near zone is realized.
The embodiment discloses a simulation method of a high-speed impact test, which is realized based on the simulation device for the coupled load of the rock in the blasting near zone, and the specific implementation mode comprises the following steps:
step 1: before the experiment, need clean the inner wall of pump line 2 and launching gun barrel 4 inner wall, prevent to have the flying speed that remains the foreign matter influence bullet on the inner wall to influence experimental result, avoid appearing the intraductal collision phenomenon in the transmission, cause danger. Confirm the closed state of each air outlet valve, prevent the condition of gas leakage from appearing in the subsequent vacuuming operation, and guarantee to push the bullet to launch in advance while injecting the compressed gas.
Step 2: before the experiment, the required target 18 to be detected, a sample support, a flyer and the like are prepared according to the experiment purpose and requirement, the target 18 to be detected, the sample support, the flyer and the like are installed in the bullet target collision chamber 5 according to the corresponding experiment method, the prefabricated carbonate embryo and the target 18 to be detected are bonded, and the carbonate embryo is aligned to the outlet of the secondary bullet 15 of the gun barrel 4.
Step 3: selecting a proper bullet support at one end of the inlet in the gun tube 4, loading the bullet support into one end of the inlet of the gun tube 4, placing a sealing membrane of 0.1mm.0.3/0.5m and a metal sealing ring, and tightly closing one end of the inlet of the gun tube 4 and one end of the outlet of the pump tube 2 at the high-pressure cone section 3 after the completion. Selecting a proper first-stage bullet 14 at the position of the pump pipe 2, loading the first-stage bullet 14 into one end of the shooting inlet of the pump pipe 2, screwing a tail plug after the installation is finished, and confirming that a gas circuit is communicated with a tail channel of a piston.
Step 4: as shown in fig. 5, after all the installation is completed, the air cannon is in a closed state, wherein the transmitting gun tube 4 and the target chamber belong to a closed space, and the pump tube 2 belongs to a closed space; then, the device can be vacuumized, so that friction between the bullet and air is reduced, and the ideal shooting state is further obtained. The vacuum pumping operation is performed through the user interface operation provided in the detection device 11, that is, the air is pumped out of the bullet target collision chamber 5, the gun tube 4 and the pump tube 2, so that the bullet target collision chamber, the gun tube and the pump tube are all in a vacuum state.
Step 5: after the vacuum degree is pumped to the specified vacuum degree, the valve at the end of the pump pipe 2 is closed, the air-filling valve of the pump pipe 2 is opened, and compressed air is injected into the pump pipe 2 to reach the expected value. According to the experimental purposes, the proper striking speed is selected, the weight of the secondary bullet 15, the thickness of the sealing membrane, the mass of the primary bullet 14 and the required air pressure are determined, and the air with the corresponding air pressure is injected into the high-pressure air chamber 1 through the combination of the control system and the air supply system.
Step 6: after all the above steps are completed, a final check is performed to see if the device 12 is set up, if the oscilloscope is properly set up, if the vacuum in the entire air cannon system meets the requirements, etc. After checking for errors, the final transmission process is performed.
Step 7: after the emission is finished, clicking an experiment end button on a user operation interface, opening a system exhaust valve and a target chamber vacuum pump, finishing final control operation, finishing experiment related data after the ejection of the bullet target collision chamber 5, the emission gun barrel 4 and the pump barrel 2 is finished, confirming whether data recording is normal, collecting experimental parameters such as fragments of a target 18 to be detected, recording impact loading speed and the like, and carrying out subsequent research processes such as data processing and the like.
Claims (10)
1. An apparatus for simulating coupled loading of an explosive near zone rock, comprising:
bullet firing means for firing secondary bullets (15) toward the target collision cell;
the bullet target collision chamber comprises a bullet target collision chamber shell (10) and a bullet target collision cavity, wherein the bullet target collision cavity comprises a target ring (13), a sample box (16), a high-temperature gas release element (17) and a target material (18) to be detected, the high-temperature gas release element (17) is fixed on the target ring (13), the sample box (16) is arranged inside the target ring (13), the sample box (16) is provided with a hollow part, the target material (18) to be detected is accommodated in the hollow part, the high-temperature gas release element (17) is positioned at the front end of the target material (18) to be detected, and the high-temperature gas release element (17) can release high-temperature gas to the secondary bullet (15) after being impacted by the secondary bullet (15);
and the recycling bin device (19) is positioned in the bullet target collision cavity and is used for recycling residues formed after the target material (18) to be detected is impacted.
2. The device for simulating the coupled load of the explosion near zone rock according to claim 1, wherein the high-temperature gas release element (17) is a blank body made of carbonate powder, and the carbonate is impacted by the secondary bullet (15) to release the ultra-temperature gas.
3. The device for simulating the coupled loading of an explosive near zone rock according to claim 2, wherein the carbonate is selected from the group consisting of calcium carbonate, sodium carbonate, magnesium carbonate, potassium carbonate, sodium bicarbonate, ferrous carbonate, copper carbonate.
4. A device for simulating coupled loading of a near-explosive rock according to claim 3, characterized in that the casing (10) of the target collision cell is provided with a sealing window (9), the device is provided with an observation device (12), and the observation device (12) observes the impact condition of the target (18) to be detected through the sealing window (9).
5. The device for simulating the coupled load of the explosion near zone rock according to any one of claims 1 to 4, wherein the bullet shooting device comprises a high-pressure air chamber (1), a pump pipe (2), a high-pressure cone section (3) and a shooting gun tube (4), and the high-pressure air chamber (1), the pump pipe (2), the high-pressure cone section (3) and the shooting gun tube (4) are sequentially connected.
6. The device for simulating the coupled load of the explosion near zone rock according to claim 4, wherein the high-pressure air chamber (1) and the pump tube (2) are filled with nitrogen and/or helium.
7. A device for simulating the coupled loading of an explosive near zone rock according to claim 5, characterized in that said high pressure air chamber (1) comprises a sealed container, a thermal insulation layer, an air inlet valve, a storage air chamber, an air outlet valve for storing and releasing compressed air to propel the primary bullet (14) to fire.
8. A device for simulating coupled loading of near field rock explosion according to claim 6, characterized in that the pump tube (2) is connected to a high pressure air chamber (1), the high pressure air chamber (1) being capable of pushing a primary bullet (14) into the pump tube (2).
The device is characterized in that the cone pressing section (3) connects the pump tube (2) with the gun tube (4) and pushes the secondary bullet 15 to move.
9. The device for simulating the coupled load of the near-explosion rock according to claim 8, wherein the primary bullet (14) comprises a piston head section and a piston tail section, the piston head section is in a circular truncated cone shape, the piston tail section is dumbbell-shaped, the piston tail end is further provided with a groove, the secondary bullet (15) is in a cylindrical shape, the tail part of the secondary bullet is provided with a stepped bulge, the secondary bullet (15) is prevented from entering the inside of the transmitting tube before the beginning of the test, and the inner side of the tail part of the secondary bullet (15) is provided with a circular truncated cone-shaped groove.
10. A method for simulating coupled load of explosion near zone rock, characterized in that the simulation device according to any one of claims 1-9 is adopted, the simulation method comprises the following steps:
s1, bonding a prefabricated high-temperature gas release element (17) and a target (18) to be detected, and aligning the high-temperature gas release element (17) to the outlet of a secondary bullet 15 of a gun barrel (4);
s2: a first-stage bullet (14) is arranged at one end of the shooting inlet of the pump pipe (2), the tail plug is screwed after the installation is finished, and the gas circuit is confirmed to be communicated with the tail channel of the piston;
s3: carrying out vacuumizing operation on the gun tube 4, the target chamber and the pump tube 2;
s4: after the vacuum degree is pumped to a specified vacuum degree, a valve at the end of the pump connecting pipe (2) is closed, the air filling valve of the pump pipe (2) is opened, and compressed air is injected into the pump pipe (2) to reach an expected value;
s5: experiments were performed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311023847.7A CN117169014A (en) | 2023-08-15 | 2023-08-15 | Simulation device and simulation method for coupled load of explosion near zone rock |
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| CN202311023847.7A CN117169014A (en) | 2023-08-15 | 2023-08-15 | Simulation device and simulation method for coupled load of explosion near zone rock |
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| CN117169014A true CN117169014A (en) | 2023-12-05 |
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