High-ground-temperature and high-water-pressure rock SHPB device for high-speed camera shooting and real-time shooting and test method

Abstract

The invention discloses a high ground temperature and high water pressure rock SHPB (split Hopkinson pressure bar) device capable of high-speed camera shooting and real-time shooting, which comprises an SHPB assembly, a water pressure loading assembly, a water bath heating circulation assembly and a mounting flat plate, and is characterized in that a water outlet of the water bath heating circulation assembly is connected with a water inlet hole of the water pressure loading assembly; a backflow port of the water bath heating circulation assembly is connected with a water outlet hole of the water pressure loading assembly, an endoscope is installed on the side wall of the water pressure loading assembly, a lens of the endoscope is arranged in the water pressure loading assembly, the field angle of the lens is 45 degrees, and the output end of the endoscope is connected with a special high-speed camera for the endoscope. According to the invention, changes of water pressure, temperature and impact force can be simulated in a deep rock impact ground pressure test, simulation of a test environment is realized, a test result is more practical, continuous images of a rock deformation and fracture process in the test can be obtained, and initiation, expansion and evolution rules of cracks in the whole test process can be obtained in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of observing rock fracture cracks in the test of rock dynamic properties, and particularly relates to a high-temperature and high-water-pressure rock SHPB device and a test method for real-time high-speed photography. Background Art

[0002] In the mining environment of deep engineering rock masses, they often face complex environments of high geothermal temperature, high karst water pressure, high in-situ stress, and strong mining disturbance, which are extremely prone to frequent occurrence of major engineering dynamic disasters such as coal and gas outbursts, earthquakes, rock bursts, and large deformations of roadway surrounding rocks. Therefore, it is essential to test the dynamic properties of rock masses in deep complex environments.

[0003] By photographing the changes in the surface cracks of rock specimens under the action of high geothermal temperature, high karst water pressure, and strong mining disturbance, the deformation and failure mechanism of rocks and the crack rupture and evolution law in deep complex environments can be revealed.

[0004] Currently, many scholars set up high-speed camera equipment beside the conventional SHPB test device to study the fracture process of rocks under impact dynamic action. However, for the failure mode of rocks in the test of rock dynamic properties under high geothermal temperature and high water pressure, it is necessary to pause the test to capture high-speed photography or collect and photograph the broken pieces after the test, and it is impossible to achieve real-time and continuous scanning.

[0005] Moreover, there is no precedent for a rock SHPB test instrument to be equipped with a high-speed camera. Therefore, many studies on the crack evolution law of rocks under the action of high geothermal temperature, high karst water pressure, and strong mining disturbance are based on speculation and calculation, lacking verification by direct observation. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems in the related technologies to some extent. For this reason, an object of the present invention is to provide a high-temperature and high-water-pressure rock SHPB device for real-time high-speed photography, which can obtain continuous images of the rock deformation and fracture process during the test and real-time obtain the laws of crack initiation, propagation, and evolution throughout the test process.

[0007] In a first aspect, the present invention provides a high geothermal and high water pressure rock SHPB device for real-time high-speed photography, which includes an SHPB assembly, a water pressure loading assembly, a water bath heating and circulation assembly, and a mounting plate. The SHPB assembly is installed at the upper end of the mounting plate. The water pressure loading assembly is located in the middle of the SHPB assembly. The water outlet of the water bath heating and circulation assembly is connected to the water inlet hole of the water pressure loading assembly, and the return port of the water bath heating and circulation assembly is connected to the water outlet hole of the water pressure loading assembly. An endoscope is installed at the side wall of the water pressure loading assembly. The lens of the endoscope is arranged inside the water pressure loading assembly with a field of view angle of 45°. The output end of the endoscope is connected to a high-speed camera dedicated to the endoscope.

[0008] Preferably, the SHPB assembly includes an incident bar, a striker bar, a transmission bar, and a damper. The water pressure loading assembly is arranged in the middle of the mounting plate. There is a barrel on one side of the mounting plate where the water pressure loading assembly is located. The striker bar is slidably connected to the outlet of the barrel. The incident bar is connected to the side wall of the water pressure loading assembly close to the barrel. The damper is located on the side of the mounting plate away from the barrel. The transmission bar is connected to the side wall of the water pressure loading assembly close to the damper. Both the incident bar and the transmission bar penetrate the side wall of the water pressure loading assembly and are slidably connected to the side wall of the water pressure loading assembly. The striker bar, the incident bar, and the transmission bar are on the same straight line.

[0009] Preferably, the water pressure loading assembly includes a confining pressure actuator. A bearing expansion hole is provided at the side wall of the water pressure loading assembly. The bearing of the confining pressure actuator is connected to the bearing expansion hole.

[0010] Preferably, a surface light source group is provided outside the water pressure loading assembly. The surface light source group includes at least two surface light sources respectively arranged on both sides of the endoscope lens. A transparent viewing window is installed at the position corresponding to the surface light source on the side wall of the water pressure loading assembly. The signal input end of the surface light source group is connected to a surface light source controller.

[0011] Preferably, the water outlet hole of the water pressure loading assembly is opened at the upper part of the water pressure loading assembly. The water outlet hole of the water pressure loading assembly is connected to the return port of the water bath heating and circulation assembly through a connecting pipe. The water inlet hole of the water pressure loading assembly is opened at the lower part of the water pressure loading assembly. The water inlet hole of the water pressure loading assembly is connected to the water outlet of the water bath heating and circulation assembly through a connecting pipe. An outlet water stop valve is installed at the water outlet pipe port of the water pressure loading assembly, and an inlet water stop valve is installed at the water inlet pipe port of the water pressure loading assembly.

[0012] Preferably, a water pressure display for detecting water pressure and a temperature sensor are respectively installed at the top of the water pressure loading assembly.

[0013] Preferably, strain gauges for collecting stress electrical signal waveform data are installed on the side walls of the incident rod and the transmission rod.

[0014] Preferably, both the incident rod and the transmission rod are fixed to the mounting plate through multiple groups of mounting baffles, and connection holes for the sliding connection of the incident rod and the transmission rod are provided in the middle of the multiple groups of mounting baffles.

[0015] Preferably, multiple groups of support seats are provided at the bottom of the mounting plate, and the lower ends of the support seats are fixed through mounting bases.

[0016] In a second aspect, a test method for a high geothermal and high water pressure rock SHPB device proposed by the present invention includes any one of the above-mentioned high geothermal and high water pressure rock SHPB devices with real-time high-speed camera shooting, and the method steps are as follows:

[0017] S1. Preparation stage: Pretreat the rock sample to be measured. After the pretreatment is completed, place the rock sample to be measured in the water pressure loading assembly and clamp both ends through the incident rod and the transmission rod respectively, and then perform step S2;

[0018] S2: Camera debugging: After installing the endoscope at the designated position, debug the surface light source group and the high-speed camera so that the imaging in the high-speed camera meets the standard, and then perform step S3;

[0019] S3: Simulate geothermal temperature: Start the water bath heating circulation assembly, open the outlet water stop valve and the inlet water stop valve, so that the temperature in the water pressure loading assembly is stable and reaches the target value, and then perform step S4;

[0020] S4: Apply water pressure: Close the outlet water stop valve and the inlet water stop valve, start the confining pressure actuator, and change the volume in the water pressure loading assembly through the expansion and contraction of the confining pressure actuator bearing until the water pressure reaches the target value, and then perform step S5;

[0021] S5: Dynamic load test: Start the SHPB assembly, launch the impact rod through the gun barrel, and the impact rod impacts the incident rod to apply a dynamic load to the rock sample to be measured, thereby realizing the environment of rock burst pressure received by deep rocks;

[0022] S6: High-speed camera shooting: During the test, use the high-speed camera to continuously shoot the images of the rock sample to be measured, and send them to the computer for display and storage until the test ends.

[0023] In a third aspect, an imaging system proposed by the present invention includes any one of the above-mentioned high geothermal and high water pressure rock SHPB devices with real-time high-speed camera shooting, and further includes a computer, and the computer is connected to the signal output end of the high-speed camera.

[0024] The beneficial effects in the present invention are:

[0025] (1) By setting up the SHPB component, the water pressure loading component and the water bath heating and circulation component, the changes in water pressure, temperature and impact force can be simulated in the deep rock rockburst test, realizing the simulation of the test environment, and the test results are more in line with the actual situation;

[0026] (2) By setting up a high-speed camera connected to the endoscope, real-time and continuous images of the deformation and fracture process of the measured rock sample can be obtained during the whole process of the rock dynamic performance test under high geothermal temperature and high water pressure, which can be applied to the observation and research of rock fracture evolution in the impact dynamics test of deep rock mass engineering, and the initiation, propagation and evolution laws of cracks can be obtained in real time during the whole process of the test;

[0027] (3) It overcomes the drawback that in the traditional test, the measured rock sample needs to be unloaded from the SHPB test device to observe the rock failure mode, and realizes the whole-process real-time cooperation between the rock SHPB test and high-speed photography under high geothermal temperature and high water pressure, which has important significance for studying the changes in rock structure, explaining the macroscopic strength and deformation mechanism, and revealing the real-time crack propagation and fracture evolution law in the rock dynamic performance test under high geothermal temperature and high water pressure. Description of the Drawings

[0028] In the drawings:

[0029] Figure 1 is a schematic structural diagram of a high geothermal temperature and high water pressure rock SHPB device with real-time high-speed photography proposed by the present invention;

[0030] Figure 2 is a cross-sectional view of the water pressure loading component proposed by the present invention;

[0031] Figure 3 is a schematic connection diagram of the high-speed camera and the endoscope proposed by the present invention;

[0032] Figure 4 is a schematic side view structure diagram of the water pressure loading component proposed by the present invention.

[0033] In the figure: 1. SHPB component; 2. Water pressure loading component; 3. Water bath heating and circulating component; 4. Damper; 5. First fixing bolt; 6. Installation base; 7. Support base; 8. Installation flat plate; 9. Incident bar; 10. Installation baffle; 11. Impact bar; 12. Barrel; 13. Strain gauge; 14. Transmission bar; 15. High-speed camera; 16. Endoscope; 16-1. Endoscope installation hole; 17. First surface light source; 18. Second surface light source; 19. Surface light source controller; 20. First circular sealing cover; 21. Heat-insulating water pipe; 22. Outlet water stop valve; 23. Water pressure display; 24. Temperature sensor; 25. First circular cover plate; 26. Transparent window; 27. Confining pressure actuator; 28. Water outlet hole; 29. Surface light source installation hole; 30. Installation screw; 31. Rubber ring; 32. Water inlet hole; 33. Bearing expansion hole; 34. Rock sample to be measured; 35. Second circular sealing cover; 36. Water outlet pipe port; 37. Second fixing bolt; 38. Outlet water fixing plate; 39. Second circular cover plate; 40. Third fixing bolt; 41. Water inlet pipe port; 42. Inlet water stop valve; 43. Inlet water fixing plate; 44. Computer. Specific implementation manner

[0034] Referring to Figure 1 , Figure 2 and Figure 3 , a high-temperature and high-water-pressure rock SHPB device for real-time high-speed camera shooting, comprising an SHPB component 1, a water pressure loading component 2, a water bath heating and circulating component 3 and an installation flat plate 8. The SHPB component 1 includes an incident bar 9, an impact bar 11, a transmission bar 14 and a damper 4. The water pressure loading component 2 is arranged in the middle of the installation flat plate 8. On one side of the installation flat plate 8 where the water pressure loading component 2 is located, there is a barrel 12. The impact bar 11 is slidably connected to the outlet of the barrel 12. The incident bar 9 is connected to the side wall of the water pressure loading component 2 close to the barrel 12. The damper 4 is located on the side of the installation flat plate 8 far from the barrel. The transmission bar 14 is connected to the side wall of the water pressure loading component 2 close to the damper 4. Both the incident bar 9 and the transmission bar 14 penetrate through the side wall of the water pressure loading component 2 and are slidably connected to the side wall of the water pressure loading component 2. The impact bar 11, the incident bar 9 and the transmission bar 14 are on the same straight line. The water outlet of the water bath heating and circulating component 3 is connected to the water inlet hole 32 of the water pressure loading component 2, and the return port of the water bath heating and circulating component 3 is connected to the water outlet hole 28 of the water pressure loading component 2. An endoscope 16 is installed at the side wall of the water pressure loading component 2. The lens of the endoscope 16 is arranged inside the water pressure loading component 2 and the field of view angle is 45°. The output end of the endoscope 16 is connected to a dedicated high-speed camera 15 for the endoscope 16.

[0035] Obviously, based on the above, the impact rod 11 can be launched through the barrel 12 to simulate the impact force, the water pressure loading component 2 can simulate the ambient water pressure, and the water bath heating and circulation component 3 can simulate the ambient water temperature, so as to realize the simulation of the test environment. At the same time, the endoscope 16 provides a better camera view and effect for the high-speed camera 15 during the test process, ensuring that the high-speed camera 15 can obtain real-time and continuous images of the deformation and fracture process of the rock sample under test during the whole process of the rock dynamic performance test under high geothermal temperature and high water pressure in real time.

[0036] Specifically, the water bath heating and circulation component 3 is mainly composed of an intelligent temperature control thermocouple, a temperature sensor, and a temperature control software system, which mainly plays the role of heating, testing the water body to rise in temperature, and maintaining the water temperature at the set value. The water bath heating temperature range is controlled between 0 and 100 °C.

[0037] Due to the short exposure time of the high-speed camera 15 and the high-intensity disturbance generated during the impact process, the requirements for the light transmission ability and material strength of the lens are relatively high. In this embodiment, the endoscope 16 uses a 10 mm large-aperture and high-brightness light-transmitting lens, ensuring a field of view angle of 45° without distortion, and the light transmission ability is better than that of a conventional endoscope lens, providing a high-quality light transmission imaging effect for the high-speed camera 15, obtaining excellent test images, being able to provide reliable image data for the experiment to the greatest extent, realizing high-resolution and high-speed photographing of the rock sample 34 under test. The high-speed imaging system uses an optical fiber high-speed transmission method to transmit data, and ultra-large amounts of data of high-resolution high-speed images can be stored in real time without compression and loss on a single computer 44.

[0038] Conventional endoscopes generally use multiple groups of optical lens elements and are connected to a high-speed camera through an optical interface to form a high-precision non-destructive high-speed imaging detection instrument. The structural setting of the endoscope 16 in this embodiment is the same. The internal structure of the insertion device of the endoscope 16 is: a special stainless steel multi-layer protective tube; pipe diameter: 10 mm; viewing direction: 45°; length: 250 mm; equipped with an optical C-type interface; the end of the lens is a 10 mm large-diameter and high-brightness light-transmitting lens, and through the structural design of a long depth of field, large field of view, and small diameter imaging objective lens, the clarity of the high-speed captured images is ensured.

[0039] The water pressure loading component 2 is provided with an endoscope mounting hole 16-1, and the lens end of the endoscope 16 is arranged parallel to the upper surface of the rock sample.

[0040] In this embodiment, referring to Figure 2 and Figure 4 , the water pressure loading component 2 includes a confining pressure actuator 27. A bearing expansion hole 33 is provided on the side wall of the water pressure loading component 2, and the bearing of the confining pressure actuator 27 is connected to the bearing expansion hole 33.

[0041] Obviously, based on the above, the confining pressure actuator 27 causes the volume inside the water pressure loading assembly 2 to change through the expansion and contraction of the bearing, thereby adjusting the water pressure inside the water pressure loading assembly 2.

[0042] In this embodiment, referring to Figure 1 and Figure 4 , a surface light source group is provided outside the water pressure loading assembly 2. The surface light source group has at least two surface light sources respectively disposed on both sides of the lens of the endoscope 16. Transparent windows 26 are installed on the side wall of the water pressure loading assembly 2 at positions corresponding to the surface light sources. The signal input ends of the surface light source group are connected to a surface light source controller 19.

[0043] Obviously, based on the above, the setting of the surface light source group can provide supplementary light inside the water pressure loading assembly 2, and at the same time, the surface light source controller 19 controls the switching and brightness of the surface light source, enabling the high-speed camera 15 to have a better imaging effect.

[0044] Specifically, the two surface light sources are respectively a surface light source one 17 and a surface light source two 18. The transparent windows 26 on the side wall of the water pressure loading assembly 2 at positions corresponding to the surface light source one 17 and the surface light source two 18 are respectively installed through a circular cover two 39 and a circular cover one 25. The transparent window 26 can be opened to facilitate the fixing and removal of the rock sample to be measured 34. The transparent window 26 is made of acrylic board.

[0045] In this embodiment, referring to Figure 2 and Figure 4 , the water outlet hole 28 of the water pressure loading assembly 2 is opened at the upper part of the water pressure loading assembly 2. The water outlet hole 28 of the water pressure loading assembly 2 is connected to the return port of the water bath heating circulation assembly 3 through a connecting pipe. The water inlet hole 32 of the water pressure loading assembly 2 is opened at the lower part of the water pressure loading assembly 2. The water inlet hole 32 of the water pressure loading assembly 2 is connected to the water outlet of the water bath heating circulation assembly 3 through a connecting pipe. An outlet water stop valve 22 is installed at the water outlet pipe port 36 of the water pressure loading assembly 2, and an inlet water stop valve 42 is installed at the water inlet pipe port 41 of the water pressure loading assembly 2.

[0046] Obviously, based on the above, through the setting of the outlet water stop valve 22 and the inlet water stop valve 42, the introduction and export of the heated circulating water can be realized, thereby controlling the stability of the temperature inside the water pressure loading assembly 2.

[0047] Specifically, a water outlet fixing plate 38 and a water inlet fixing plate 43 are respectively arranged at the water outlet hole 28 and the water inlet hole 32. The water outlet fixing plate 38 is fixed to the connecting pipe through a fixing bolt two 37, and the water inlet fixing plate 43 is fixed to the connecting pipe through a fixing bolt three 40. The connecting pipes are all made of heat-insulating water pipes 21.

[0048] In this embodiment, referring to Figure 4, a water pressure display 23 for detecting water pressure and a temperature sensor 24 for detecting temperature are respectively installed at the top of the water pressure loading component 2.

[0049] Obviously, based on the above, the water pressure and temperature can be displayed in real time through the water pressure display 23 and the temperature sensor 24, which is convenient for the operator to operate.

[0050] In this embodiment, referring to Figure 1 , strain gauges 13 for collecting stress electrical signal waveform data are installed on the side walls of the incident rod 9 and the transmission rod 14.

[0051] Obviously, based on the above, the specific parameter signals of the SHPB component 1 can be collected through the strain gauges 13.

[0052] In this embodiment, referring to Figure 1 , both the incident rod 9 and the transmission rod 14 are fixed to the mounting plate 8 through multiple groups of mounting baffles 10, and connection holes for the sliding connection of the incident rod 9 and the transmission rod 14 are provided in the middle of the multiple groups of mounting baffles 10.

[0053] Obviously, based on the above, the incident rod 9 and the transmission rod 14 are fixed through multiple groups of mounting baffles 10, which is convenient for adjusting the mounting heights of the incident rod 9 and the transmission rod 14, so that the mounting heights of the incident rod 9 and the transmission rod 14 meet the requirements.

[0054] Specifically, a circular seal cover one 20 is provided at the connection between the incident rod 9 and the water pressure loading component 2, and a circular seal cover two 35 is provided at the connection between the transmission rod 14 and the water pressure loading component 2. Both the circular seal cover one 20 and the circular seal cover two 35 are fixed to the water pressure loading component 2 through mounting screws 30, and rubber rings 31 for preventing water leakage are provided inside both the circular seal cover one 20 and the circular seal cover two 35.

[0055] In this embodiment, referring to Figure 1 , multiple groups of support seats 7 are provided at the bottom of the mounting plate 8, an installation base 6 is provided at the lower end of the support seat 7, and the installation base 6 is fixed to the ground through a fixing bolt one 5.

[0056] Obviously, based on the above, the settings of the support seat 7 and the installation base 6 ensure that the test has a stable working platform.

[0057] As another embodiment of the present application, this embodiment proposes a test method for a high geothermal and high water pressure rock SHPB device, including any one of the above-mentioned high geothermal and high water pressure rock SHPB devices with real-time high-speed camera shooting. The method steps are as follows:

[0058] S1. Preparation stage: Pretreat the rock sample to be measured 34. After the pretreatment is completed, place the rock sample to be measured 34 in the water pressure loading component 2, and clamp both ends through the incident rod 9 and the transmission rod 14 respectively, and then execute step S2;

[0059] Specifically, the polished rock sample to be measured 34 is placed in the water bath heating and circulation assembly 2 before the test and fully saturated in the corresponding heated water body to ensure that the internal temperature of the rock sample to be measured 34 reaches the corresponding geothermal temperature, improving the accuracy and reliability of the test. It is placed into the water pressure loading device 2 by opening the circular cover plate. The distance between the incident rod 9 and the transmission rod 14 is adjusted by the axial jack to ensure that the rock sample to be measured 34 is clamped. In this embodiment, the size of the rock sample to be measured is set to Finally, the circular cover plate is fixed;

[0060] S2: Camera debugging: After the endoscope 16 is installed at the designated position, the surface light source group and the high-speed camera 15 are debugged so that the imaging in the high-speed camera 15 meets the standard, and then step S3 is executed;

[0061] Specifically, the surface light source one 17 and the surface light source two 18 are respectively placed on both sides of the circular cover plate of the water pressure loading assembly 2, and the endoscope 16 connected to the high-speed camera 15 is inserted into the endoscope installation hole 16-1 at the upper part of the water pressure loading assembly 2. Specifically, the power supply of the high-speed camera system is turned on, the surface light source one 17 and the surface light source two 18 are respectively connected to the surface light source controller 19, the surface light source controller 19 is adjusted to make the captured image clear, and the high-speed camera 15 is adjusted to the preset shooting frame rate through the control software matching the high-speed camera in the computer 44;

[0062] S3: Simulating geothermal temperature: Start the water bath heating and circulation assembly 3, open the outlet water stop valve 22 and the inlet water stop valve 42, and when the temperature in the water pressure loading assembly 2 is stable and reaches the target value, execute step S4;

[0063] Specifically, the water body at the corresponding temperature in the water bath heating and circulation assembly 3 is transported to the periphery of the rock sample to be measured 34 through the heat-insulating water pipe 21. The circulation button in the water bath heating and circulation assembly 3 is started to make the heated water body circulate back and forth for a certain time to exhaust the internal air. By checking the temperature value on the temperature display 23, the temperature change of the water body around the rock sample to be measured 34 is made more stable, improving the accuracy of the test;

[0064] S4: Applying water pressure: Close the outlet water stop valve 22 and the inlet water stop valve 42, start the confining pressure actuator 27, and make the volume in the water pressure loading assembly 2 change through the expansion and contraction of the bearing of the confining pressure actuator 27 until the water pressure reaches the target value, and then execute step S5;

[0065] Specifically, close the outlet water stop valve 22 and the inlet water stop valve 42 on the water pressure loading assembly 2 to stop the water body circulation. The water pressure loading assembly 2 uses the confining pressure actuator 27 to make the volume of the water medium change through the telescopic bearing rod to apply water pressure to the rock sample to be measured 34. At the same time, fix the positions of the incident rod and the transmission rod by tightening the axial jack to prevent the distance between the incident rod 9 and the transmission rod 14 from becoming larger due to excessive water pressure and prevent the rock sample to be measured from falling off;

[0066] S5: Dynamic load test: Start the SHPB component, fire the impact rod 11 through the barrel 12, and the impact rod 11 impacts the incident rod 9 to apply a dynamic load to the rock sample 34 to be measured, thereby realizing the environment of rock burst suffered by deep rocks;

[0067] S6: High-speed photography: During the test, the high-speed camera 15 is used to continuously capture the images of the rock sample 34 to be measured in real time and send them to the computer 44 for display and storage until the end of the test.

[0068] In step S6, the high-speed photography system is used to continuously capture the rock sample 34 to be measured in real time throughout the SHPB test until the end of the test. Since the crack initiation and propagation process of the rock sample 34 to be measured is very rapid, in order to accurately capture the crack changes, the shooting frame rate of the dedicated high-speed camera can be adjusted at any time during the test to achieve the best shooting effect.

[0069] As another embodiment of the present application, this embodiment proposes an imaging system, which includes any one of the above-mentioned high-temperature and high-water-pressure rock SHPB devices with real-time high-speed photography, and also includes a computer 44, and the computer 44 is connected to the signal output end of the high-speed camera 15.

Claims

1. A high-temperature and high-water-pressure rock SHPB device for real-time high-speed photography shooting, characterized in that: It includes an SHPB component (1), a water pressure loading component (2), a water bath heating and circulation component (3), and a mounting plate (8). The SHPB component (1) is installed at the upper end of the mounting plate (8). The water pressure loading component (2) is located in the middle of the SHPB component (1). The water outlet of the water bath heating and circulation component (3) is connected to the water inlet hole (32) of the water pressure loading component (2). The return port of the water bath heating and circulation component (3) is connected to the water outlet hole (28) of the water pressure loading component (2). An endoscope (16) is installed at the side wall of the water pressure loading component (2). The lens of the endoscope (16) is arranged inside the water pressure loading component (2) with a field of view angle of 45°. The output end of the endoscope (16) is connected to a high-speed camera (15) dedicated to the endoscope (16).

2. The high-temperature and high-water-pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: The SHPB component (1) includes an incident bar (9), a striker bar (11), a transmission bar (14), and a damper (4). The water pressure loading component (2) is arranged in the middle of the mounting plate (8). A barrel (12) is provided on one side of the mounting plate (8) where the water pressure loading component (2) is located. The striker bar (11) is slidably connected to the outlet of the barrel (12). The incident bar (9) is connected to the side wall of the water pressure loading component (2) close to the barrel (12). The damper (4) is located on the side of the mounting plate (8) away from the barrel. The transmission bar (14) is connected to the side wall of the water pressure loading component (2) close to the damper (4). Both the incident bar (9) and the transmission bar (14) penetrate through the side wall of the water pressure loading component (2) and are slidably connected to the side wall of the water pressure loading component (2). The striker bar (11), the incident bar (9), and the transmission bar (14) are on the same straight line.

3. A high geothermal and high water pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: The water pressure loading component (2) includes a confining pressure actuator (27). A bearing expansion and contraction hole (33) is provided at the side wall of the water pressure loading component (2). The bearing of the confining pressure actuator (27) is connected to the bearing expansion and contraction hole (33).

4. A high geothermal and high water pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: A surface light source group is provided outside the water pressure loading component (2). The surface light source group includes at least two surface light sources respectively arranged on both sides of the lens of the endoscope (16). Transparent windows (26) are installed at the positions corresponding to the surface light sources on the side wall of the water pressure loading component (2). The signal input end of the surface light source group is connected to a surface light source controller (19).

5. A high geothermal and high water pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: The water outlet hole (28) of the water pressure loading component (2) is opened at the upper part of the water pressure loading component (2). The water outlet hole (28) of the water pressure loading component (2) is connected to the return port of the water bath heating and circulating component (3) through a connecting pipe. The water inlet hole (32) of the water pressure loading component (2) is opened at the lower part of the water pressure loading component (2). The water inlet hole (32) of the water pressure loading component (2) is connected to the water outlet of the water bath heating and circulating component (3) through a connecting pipe. An outlet water stop valve (22) is installed at the water outlet pipe port (36) of the water pressure loading component (2), and an inlet water stop valve (42) is installed at the water inlet pipe port (41) of the water pressure loading component (2).

6. A high ground temperature and high water pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: A water pressure display (23) and a temperature sensor (24) for detecting water pressure and temperature are respectively installed at the top of the water pressure loading component (2).

7. A high geothermal and high water pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: Strain gauges (13) for collecting stress electrical signal waveform data are installed on the side walls of the incident rod (9) and the transmission rod (14).

8. A high geothermal and high water pressure rock SHPB device for real-time high-speed photography according to claim 1, characterized in that: Multiple groups of support seats (7) are provided at the bottom of the installation flat plate (8), and the lower ends of the support seats (7) are fixed through an installation base (6).

9. A test method for a high-temperature and high-water-pressure rock SHPB device, characterized in that: Comprising the high geothermal high water pressure rock SHPB device with high-speed camera real-time shooting as described in any one of claims 1-8, the method steps are as follows: S1. Preparation stage: Pretreat the rock sample to be measured (34). After the pretreatment is completed, place the rock sample to be measured (34) in the water pressure loading component (2), and clamp both ends through the incident rod (9) and the transmission rod (14) respectively, and execute step S2; S2: Camera debugging: After installing the endoscope (16) at the designated position, debug the surface light source group and the high-speed camera (15) so that the imaging in the high-speed camera (15) meets the standard, and then execute step S3; S3: Simulate geothermal temperature: Start the water bath heating and circulating component (3), open the outlet water stop valve (22) and the inlet water stop valve (42), so that the temperature in the water pressure loading component (2) is stable and reaches the target value, and then execute step S4; S4: Apply water pressure: Close the outlet water stop valve (22) and the inlet water stop valve (42), open the confining pressure actuator (27), and make the volume in the water pressure loading component (2) change through the expansion and contraction of the bearing of the confining pressure actuator (27), and when the water pressure reaches the target value, execute step S5; S5: Dynamic load test: Start the SHPB component, launch the impact rod (11) through the barrel (12), and the impact rod (11) impacts the incident rod (9) to apply a dynamic load to the rock sample to be measured (34), thereby realizing the environment of rock burst pressure suffered by deep rocks; S6: High-speed camera shooting: During the test, the high-speed camera (15) is used to continuously shoot the images of the rock sample to be measured (34) in real time, and send them to the computer (44) for display and storage until the test ends.

10. An imaging system, characterized in that: Comprising the high geothermal high water pressure rock SHPB device with high-speed camera real-time shooting as described in any one of claims 1-8, further comprising a computer (44), and the computer (44) is connected to the signal output end of the high-speed camera (15).

Images