Experimental device for testing drop hammer type linear impact induced rock splitting and performance of drop hammer type linear impact induced rock splitting

Abstract

The invention discloses a drop hammer type linear impact induced rock splitting and performance test experimental device, which comprises a base, a plurality of linear impact induced rock splitting devices, a plurality of linear impact induced rock splitting devices and a plurality of linear impact induced rock splitting devices, the supporting frame is arranged on the base; the impact unit is arranged on the supporting frame; and the impact device movement system is used for driving the impact unit to realize vertical impact on the rock sample under the control of the motor. According to the device, the drop hammer type linear load technology is adopted, the magnitude and the direction of impact force and the frequency and the position of a drop hammer can be accurately controlled, therefore, the rock breaking task can be rapidly and effectively completed, and the working efficiency is improved. And due to the flexibility, the application range of the device in the field of rock splitting is expanded, and the operability and efficiency of the device in practice are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rock fracture mechanics experiments, and more specifically, to a drop hammer type linear impact induced rock splitting and its performance testing experimental device. Background Art

[0002] The linear impact load rock breaking technology is an improvement and innovation of traditional rock breaking methods, stemming from concerns about problems such as safety risks, environmental impacts, and resource waste existing in traditional methods. When a linear load acts on the rock surface, it will cause stress transmission and concentration, thereby generating areas of stress concentration on the rock surface. These stress concentrations may exceed the tensile strength or shear strength of the rock, resulting in the formation of cracks. Once the cracks are formed, the continuous action of the load will cause the cracks to expand, ultimately leading to the splitting failure of the rock. The direction and speed of crack propagation depend on the mechanical properties of the rock, the magnitude and action mode of the load, and the internal structural characteristics of the rock. As the cracks expand, the rock gradually loses its structural integrity and strength, and may ultimately lead to the disintegration, spalling, collapse, or fracture of the rock.

[0003] The basic principle of the linear impact load rock breaking technology is to apply a linear impact load to the rock by allowing a heavy object to freely fall on a linear tool, thereby forming a tensile stress wave perpendicular to the linear load in the rock, and ultimately achieving rock splitting. Compared with traditional rock breaking methods such as explosion and high-pressure water jet, this method has advantages such as a simple structure of the mechanical rock breaking device, less energy required for rock breaking, and a lower strain rate of the impact load. However, there are still some unclear points regarding the mechanism of splitting rocks by linear impact loads, so it is necessary to provide experimental devices for research.

[0004] The disadvantages of the prior art are as follows: 1. The current technology is limited to splitting a single specimen once, which limits the efficiency of auxiliary rock breaking.

[0005] 2. The hydraulic rock breaking device is complex, has a high maintenance cost, consumes a large amount of energy, is affected by temperature, generates noise and vibration, has potential safety hazards and usage limitations, and relies on external energy supply.

[0006] 3. Compared with blasting-assisted rock-breaking devices, blasting operations have many disadvantages. Blasting is difficult to precisely control the formation and expansion of cracks, and sometimes it may lead to excessive damage or failure to achieve the expected effect. In addition, rigorous planning and preparation are required before blasting, and subsequent cleaning of blast fragments will also increase the time cost. A large amount of energy and raw materials are also needed, such as explosives, fuels, etc., and the efficiency is not high, which may result in resource waste. In sensitive locations or when it is necessary to protect surrounding facilities, blasting operations may not be applicable, and alternative solutions need to be found. At the same time, the limitations of geological conditions, topography, surrounding buildings, etc. also increase the complexity of blasting operations. Blasting may cause environmental pollution and safety risks, such as noise, vibration, and dust, which have an adverse impact on the surrounding environment and human health, and may even lead to accidents. Blasting may be restricted by laws and regulations in some areas, or cannot be used in some sensitive environments.

[0007] 4. There are some challenges in the process of rock-breaking by point load. First of all, it only concentrates the force on a small area of the rock, resulting in a limited damage range and difficulty in achieving uniform damage to the entire rock mass. This may lead to uneven internal stress in the rock, incomplete cracks or local excessive damage, affecting the rock-breaking effect. Secondly, it is difficult to precisely control the application position and force of the point load, so it is often impossible to accurately control the direction and range of rock-breaking, resulting in resource waste and reduced efficiency. In addition, due to the need to concentrate a large amount of force on a small area, point load rock-breaking devices usually consume more energy and have relatively high operating costs. In addition, relatively large noise and vibration may be generated during point load rock-breaking operations, causing certain interference and impact on the surrounding environment and personnel. At the same time, there are certain safety risks in the operation of hydraulic systems or mechanical equipment. For example, hydraulic system leakage or mechanical failures may lead to accidents. Summary of the Invention

[0008] The purpose of the present invention is to provide a drop hammer linear impact-induced rock splitting and its performance test experimental device in order to solve the technical problems in the background technology.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions: A drop hammer linear impact-induced rock splitting and its performance test experimental device, comprising: A base, which plays a supporting role; A support frame, which is arranged on the base; An impact unit, which is arranged on the support frame; An impact device motion system, which is used to drive the impact unit to achieve a vertical impact on the rock specimen under the control of a motor.

[0010] In some embodiments, the support frame includes a guide rail bracket, an upper cross beam, and a fixed cross beam. Two guide rail brackets and the upper cross beam form a door frame structure, and the fixed cross beam is arranged between the two guide rail brackets below the upper cross beam.

[0011] In some embodiments, the impact unit includes a vertical impact hammer and an impact head unit. Two vertical impact hammers slide through the upper cross beam, and the bottoms of the two vertical impact hammers are located on both sides of the fixed cross beam. The impact head unit is arranged on the fixed cross beam; the impact head unit realizes vertical impact on the rock sample under the impact of the two vertical impact hammers.

[0012] In some embodiments, the impact head unit includes a fixed impact head structure, a positioning pin, an impact head support column, and an impact head. Two fixed impact head structures are arranged at both ends of the horizontally arranged impact head support column. A limiting cavity is arranged on the fixed cross beam between the two fixed impact head structures. The positioning pin slides through the limiting cavity, and the positioning pin only has displacement in the vertical direction in the limiting cavity. The positioning pin is fixedly connected to the impact head support column, and the bottom of the positioning pin is fixedly connected to the impact head. The two fixed impact head structures are respectively connected to both sides of the impact head.

[0013] In some embodiments, the impact device motion system includes: a swing arm, a damping rod, a linkage rod, a support arm, and a limiting rod. The support arm is arranged on the upper cross beam. The middle of the swing arm is rotatably arranged on the support arm. One end of the swing arm is rotatably connected to the damping rod, the other end of the damping rod is rotatably connected to the linkage rod, and the other end of the linkage rod is fixedly connected to the output end of the motor; two limiting rods are arranged side by side up and down between the two vertical impact hammers, and the other end of the swing arm passes through the gap between the two limiting rods.

[0014] In some embodiments, it further includes: a rock clamping device. There are two rock clamping devices, which are respectively arranged on the base and used for clamping and fixing the sample; the rock clamping device includes: a clamping cylinder, and a clamping head is arranged at the telescopic end of the clamping cylinder.

[0015] In some embodiments, it further includes: a guide sleeve. The guide sleeve is arranged below the upper cross beam, and the vertical impact hammer slides through the guide sleeve.

[0016] In some embodiments, it further includes: a high-speed camera. Two high-speed cameras are arranged on the front and back sides of the rock sample and used for photographing the damage and deformation conditions of the rock sample.

[0017] The technical effects of the present invention compared with the prior art are as follows: The technical solution of the present invention adopts a drop - hammer type linear impact load. Through the impact unit, the fracture position of the rock can be controlled more precisely. The device adopts a simple drop - hammer mechanical structure, which improves the practicability. The impact head part is made of high - strength steel, and impact heads with matching sizes can be selected according to the characteristics of different rocks to improve the rock breaking efficiency.

[0018] The motor - driven system can adjust the speed of the motor through a switch to achieve the change of the linear impact load. The positioning pin can determine the movement trajectory of the fixed impact head structure. Rock clamping devices are installed on both sides of the rock specimen to ensure the accurate position of the specimen.

[0019] High - speed camera devices are installed on the other two side edges of the specimen. It can not only measure the impact speed of the replaceable impact head at the top of the fixed impact head structure, but also transmit the process of specimen destruction to the computer to generate a large amount of image data for subsequent research such as deformation measurement, velocity field analysis, and crack propagation.

[0020] Such high - resolution images can capture minute deformations and cracks, enabling accurate measurement and analysis of the subtle changes in the specimen. The splitting stress value can be estimated using the deformation information and the mechanical properties of the rock material, avoiding the possible additional influences of other methods, maintaining the original state of the test, and being more conducive to the study of rock specimen failure. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of an experimental device for inducing rock splitting by a drop - hammer type linear impact load disclosed by the present invention; Figure 2 is a schematic diagram of the impact head disclosed by the present invention; Figure 3 is a schematic diagram of the rock clamping device disclosed by the present invention; Figure 4 is a schematic diagram of the impact device motion system disclosed by the present invention; Figure 5 is a schematic diagram of the impact head unit disclosed by the present invention.

[0022] Illustration: 1 - base, 2 - upper cross - beam, 3 - fixed cross - beam, 4 - engine regulator, 5 - guide rail support, 6 - guide sleeve, 7 - motor, 8 - high - speed camera, 9 - rock clamping device, 10 - rock specimen, 11 - fixed impact head structure, 12 - positioning pin, 13 - linkage rod, 14 - vertical impact hammer, 15 - impact device motion system, 16 - impact head, 901 - clamping head, 902 - clamping cylinder, 1201 - impact head support column, 1501 - damping rod, 1502 - limiting rod, 1503 - swing arm, 1504 - support arm. Detailed Implementation Modes

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of this application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain this application and should not be construed as limiting this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0024] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the internal connection or interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0027] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or displays.

[0028] The following will be combined with Figures 1 - 5 to describe in detail an experimental device for drop-hammer linear impact-induced rock splitting and its performance testing related to the embodiments of this application. It should be noted that the following embodiments are only for explaining this application and do not constitute a limitation to this application.

[0029] Embodiment 1 See Figures 1 - 5, A drop hammer type linear impact induced rock splitting and its performance testing experimental device, comprising: a base 1, a support frame, an impact unit, and an impact device motion system 15. The base 1 plays a supporting role; the support frame is arranged on the base 1; the impact unit is arranged on the support frame; the impact device motion system 15 is used to drive the impact unit under the control of a motor 7 to achieve a vertical impact on a rock specimen 10 placed on a rock specimen cushion 17.

[0030] The impact unit includes a vertical impact hammer 14 and an impact head unit. The two vertical impact hammers 14 slide through the upper cross beam 2 vertically, and the bottoms of the two vertical impact hammers 14 are located on both sides of the fixed cross beam 3. The impact head unit is arranged on the fixed cross beam 3; the impact head unit realizes a vertical impact on the rock specimen 10 under the impact of the two vertical impact hammers 14.

[0031] The device provided by this application can realize multiple splittings of the test piece, thereby expanding the damage range and increasing the crack density, which greatly promotes the smooth progress of subsequent rock breaking work. The drop hammer type linear load technology is adopted, which can accurately control the magnitude and direction of the impact force, as well as the frequency and position of the drop hammer. Therefore, the rock breaking task can be completed quickly and effectively, improving work efficiency. Moreover, this flexibility not only expands the application range of the device in the field of rock splitting, but also improves its operability and efficiency in practice.

[0032] The support frame includes a guide rail support 5, an upper cross beam 2 and a fixed cross beam 3. The two guide rail supports 5 and the upper cross beam 2 form a door frame structure, and the fixed cross beam 3 is arranged between the two guide rail supports 5 below the upper cross beam 2.

[0033] The impact head unit includes a fixed impact head structure 11, a positioning pin 12, an impact head support column 1201, and an impact head 16. The two fixed impact head structures 11 are arranged at both ends of the horizontally arranged impact head support column 1201. There is a limiting cavity on the fixed cross beam 3 between the two fixed impact head structures 11. The positioning pin 12 slides through the limiting cavity, and the positioning pin 12 has only a vertical displacement in the limiting cavity. The positioning pin 12 is fixedly connected to the impact head support column 1201, and the bottom of the positioning pin 12 is fixedly connected to the impact head 16. The two fixed impact head structures 11 are respectively connected to both sides of the impact head 16.

[0034] The fixed impact head structure 11 moves downward through the positioning pin 12. The positioning pin 12 slides through the limiting cavity, and the positioning pin 12 has only vertical displacement in the limiting cavity, which enables the fixed impact head structure 11 to move downward without being resisted by the positioning pin 12. The other side of the positioning pin 12 penetrates through the fixed crossbeam 3. The function of the positioning pin 12 is to enable the entire impact head unit to move downward in a relatively straight line, so as to precisely break the rock sample 10. The positioning pin 12 is not immovable. Its lower end rests on the upper surface of the rock sample 10, similar to a bolt, only restricting left and right swings but not restricting up and down sliding. Figure 5 The entire structure moves downward with the positioning pin 12. Before the test is carried out Figure 5 The entire device is in a detachable structure. After placing the rock sample 10, Figure 5 the entire device is placed on the rock sample 10 for impact testing. The vertical impact hammer 14 cuts the rock sample 10 by hitting the fixed impact head structure 11.

[0035] The movement system 15 of the impact device includes: a swing arm 1503, a damping rod 1501, a linkage rod 13, a support arm 1504, and a limiting rod 1502. The swing arm 1503 can be a steel swing arm 1503. The support arm 1504 is arranged on the upper crossbeam 2. The middle of the swing arm 1503 is rotatably arranged on the support arm 1504. One end of the swing arm 1503 is rotatably connected to the damping rod 1501, the other end of the damping rod 1501 is rotatably connected to the linkage rod, and the other end of the linkage rod 13 is fixedly connected to the output end of the motor 7; two limiting rods 1502 are arranged side by side up and down between the two vertical impact hammers 14, and the other end of the swing arm 1503 passes through the gap between the two limiting rods 1502.

[0036] The motor 7 drives the damping rod 1501 to move by rotating the linkage rod 13. The rotating linkage rod 13 can perform rotational motion, forming an arc-shaped motion trajectory, thereby driving the steel swing arm 1503 to swing left and right through the middle support arm 1504. When the damping rod 1501 moves downward, the left side of the steel swing arm 1503 rises, driving the vertical impact hammer 14 through the limiting rod 1502, causing the vertical impact hammer 14 to move up and down.

[0037] It further includes: a rock clamping device 9. There are two rock clamping devices 9, which are respectively arranged on the base 1 for clamping and fixing the sample; the rock clamping device 9 includes: a clamping cylinder 902, and a clamping head 901 is provided at the telescopic end of the clamping cylinder 902. The clamping head 901 is driven by the clamping cylinder to clamp the rock sample 10.

[0038] The drop hammer linear impact induced rock splitting and its performance test experimental device further includes: a guiding sleeve 6, which is arranged below the upper cross beam 2, and the vertical impact hammer 14 slides through the guiding sleeve 6. The guiding sleeve 6 is provided to ensure that the vertical impact hammer 14 can move more smoothly up and down, so as to ensure that the impact position and direction of the vertical impact hammer 14 are the same each time.

[0039] An engine regulator 4 is provided on the guide rail bracket 5 to control the rotation speed of the motor 7, so as to control the impact force of the vertical impact hammer 14.

[0040] The drop hammer linear impact induced rock splitting and its performance test experimental device further includes: a high-speed camera 8, which is arranged on the high camera bracket 18, and two high-speed cameras 8 are arranged on the front and back sides of the rock specimen 10 for photographing the damage and deformation of the rock specimen 10.

[0041] The device of the present application is used to induce rock splitting and test its mechanical properties, and adopts a drop hammer linear impact load. At the beginning of the experiment, the rock specimen 10 is fixed at a predetermined failure position by the rock clamping device 9. Then, the fixed impact head structure 11 is firmly installed at a certain height by using the fixed cross beam 3, and the fixed impact head 16 is positioned and fixed by using the positioning pin 12, and the impact head 16 is directly contacted with the rock specimen 10. Subsequently, the high-speed camera 8 is turned on to perform high-definition shooting on the damage process of the rock specimen 10.

[0042] When the device is operating, by adjusting the engine regulator 4, the motor 7 drives the vertical impact hammer 14 to move up and down through the impact device motion system 15 connected by the linkage rod 13. The guiding sleeve 6 can fix the falling track of the drop hammer during the up and down movement of the vertical impact hammer 14 to ensure that the drop hammer accurately falls on the fixed impact head structure 11.

[0043] After the impact is completed, the engine regulator 4 is turned off, and the damage condition of the rock is observed. Then, the motor 7 is rotated in multiple gears, and the impact head 16 can repeatedly impact the specimen up and down. By observing the data transmitted by the high-speed camera 8, the gear of the engine regulator 4 can be adjusted to improve the efficiency of damaging the specimen.

[0044] Finally, using the data transmitted by the high-speed camera 8, the speed of the impact head 16 is obtained, and a large amount of image data is generated for research such as deformation measurement, velocity field analysis, and crack propagation. These high-resolution images can capture minute deformations and cracks, enabling accurate measurement and analysis of the subtle changes in the specimen. Using the deformation information and the mechanical properties of the rock material, the splitting stress value can be estimated, and the length and depth of the cracks can be measured. This method avoids the possible additional influences of other methods, maintains the original state of the test, and is beneficial to the research on the failure of the rock specimen 10.

[0045] In contrast, the linear impact load of the drop hammer can more easily control the fracture direction of the rock and achieve precise destruction. Compared with traditional blasting operations or other mechanical rock breaking devices, the drop hammer device usually produces less environmental pollution. Its operation process does not involve chemicals or high-temperature and high-pressure fluids, nor does it produce a large amount of dust and waste, so it has less impact on the surrounding environment. It also reduces internal uncertainties, thereby reducing the safety risks of rock breaking operations.

[0046] Compared with general hydraulic rock breaking devices, the drop hammer device has many advantages. Its structure is simple and clear, and it gets rid of the complex hydraulic system, so it is easier to maintain and operate, and has higher stability. It is relatively simple to adjust the impact force of the drop hammer device, just adjust the free fall of the drop hammer, which is more convenient than adjusting the hydraulic system. The device is not affected by factors such as hydraulic oil temperature and pressure, and has a wider adaptability and can be used in various environmental conditions. In certain specific scenarios, such as small or difficult-to-reach work areas, its operation is more convenient. In addition, the manufacturing cost is usually low, which is more attractive for projects with limited budgets.

[0047] This device uses the motor 7 as the power source. The speed of the motor 7 can be adjusted by means of a switch, thereby accurately controlling the magnitude of the drop hammer impact load. Combined with sensor technology, it can accurately identify the impact load required for the rock sample 10 to break, making the adjustment of the motor 7 for different specimens more accurate. This intelligent design not only greatly improves the efficiency of rock breaking operations, but also ensures adaptability and accurate destruction of various types of rocks, providing reliable technical support for rock engineering.

[0048] Drop hammer devices are usually composed of simple mechanical structures, easy to maintain and service, and have a long service life. In contrast, disposable blasting materials or hydraulic systems may require more frequent replacement and maintenance, with higher costs and resource consumption.

[0049] Linear impact load considers the use of a more evenly distributed force method and a wider range of pressure applications. Linear impact load can form continuous cracks on the rock surface, achieve more uniform damage, make the rock more evenly stressed, reduce stress concentration inside the rock, and help improve rock breaking efficiency.

[0050] The device utilizes a replaceable impact head 16, which can be switched according to the size of the rock sample 10, thereby improving the efficiency of impact destruction. By adjusting the size of the cutter head, rocks of different sizes and types can be processed more effectively, thereby improving the effect of rock breaking.

[0051] The device uses high-speed photography technology to capture real-time deformation and failure during the test at an extremely high frame rate, enabling detailed observation of the behavior of materials during the loading process. This non-contact measurement method does not require direct contact with the specimen, so it will not have an additional impact on it, maintaining the original capture of tiny deformations and cracks in the test, thus enabling accurate measurement and analysis of the subtle changes in the specimen.

[0052] The above are only the preferred embodiments of the present invention and are used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drop hammer type linear impact induced rock splitting and its performance testing experimental device, characterized in that Comprising: A base, which serves as a support; A support frame, which is arranged on the base; An impact unit, which is arranged on the support frame; An impact device motion system, which is used to drive the impact unit to perform a vertical impact on a rock specimen under the control of a motor.

2. The experimental device for rock splitting induced by drop hammer linear impact and its performance testing according to claim 1, characterized in that, The support frame includes a guide rail bracket, an upper cross beam and a fixed cross beam. Two guide rail brackets and the upper cross beam form a door frame structure, and the fixed cross beam is arranged between the two guide rail brackets below the upper cross beam.

3. A drop hammer type linear impact induced rock splitting and its performance test experimental device according to claim 2, characterized in that, The impact unit includes a vertical impact hammer and an impact head unit. Two vertical impact hammers slide through the upper cross beam, and the bottoms of the two vertical impact hammers are located on both sides of the fixed cross beam. The impact head unit is arranged on the fixed cross beam; the impact head unit realizes a vertical impact on the rock specimen under the impact of the two vertical impact hammers.

4. The experimental device for rock splitting induced by drop hammer linear impact and its performance test according to claim 3, characterized in that, The impact head unit includes a fixed impact head structure, a positioning pin, an impact head support column and an impact head. Two fixed impact head structures are arranged at both ends of the horizontally arranged impact head support column. A limit cavity is arranged on the fixed cross beam between the two fixed impact head structures. The positioning pin slides through the limit cavity, and the positioning pin only has a displacement in the vertical direction in the limit cavity. The positioning pin is fixedly connected to the impact head support column, and the bottom of the positioning pin is fixedly connected to the impact head. The two fixed impact head structures are respectively connected to both sides of the impact head.

5. The experimental device for drop hammer type linear impact induced rock splitting and its performance testing according to claim 1, characterized in that, The impact device motion system includes: a swing arm, a damping rod, a linkage rod, a support arm and a limit rod. The support arm is arranged on the upper cross beam. The middle part of the swing arm is rotatably arranged on the support arm. One end of the swing arm is rotatably connected to the damping rod, the other end of the damping rod is rotatably connected to the linkage rod, and the other end of the linkage rod is fixedly connected to the output end of the motor; two limit rods are arranged side by side up and down between the two vertical impact hammers, and the other end of the swing arm passes through the gap between the two limit rods.

6. The experimental device for rock splitting induced by drop hammer linear impact and its performance testing according to claim 1, characterized in that, Also comprising: A rock clamping device, and there are two rock clamping devices, which are respectively arranged on the base and are used to clamp and fix the sample; The rock clamping device includes: a clamping cylinder, and a clamping head is arranged at the telescopic end of the clamping cylinder.

7. An experimental device for drop - hammer linear impact - induced rock splitting and its performance testing according to claim 5, characterized in that, Also comprising: A guide sleeve, which is arranged below the upper cross beam, and the vertical impact hammer slides through the guide sleeve.

8. An experimental device for rock splitting induced by drop hammer linear impact and its performance testing according to claim 1, characterized in that, Also comprising: A high-speed camera, and two high-speed cameras are arranged on the front and back sides of the rock specimen and are used to photograph the damage and deformation conditions of the rock specimen.

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