Rock sample preparation apparatus and method including multiple intersecting joints

Abstract

The application discloses a rock sample preparation device and method containing multiple cross joints. The device comprises a lateral restraint device, which is arranged on a loading device and slides up and down on the loading device. The lateral restraint device has a space reserved for placing a rock sample, and is used for clamping the rock sample and applying confining pressure. A splitting device is arranged on the loading device and rotates and slides on the loading device, and is used for splitting the rock sample at different angles. The lateral restraint device clamps the rock sample. When the splitting device splits the rock sample, the joint surfaces generated by splitting the rock sample can more easily penetrate each other due to the confining pressure applied by the lateral restraint device, and the preset joint surfaces are not prone to deflection, dislocation, deviation from the preset dip angle or strike at the edge of the sample, effectively solving the problems of difficulty in mutual cross penetration between multiple (groups) of joint surfaces and crack deflection at the edge of the rock sample.

Description

Technical Field

[0001] This invention relates to the field of rock sample preparation technology, specifically to a rock sample preparation device and method containing multiple intersecting joints. Background Technology

[0002] Natural rock masses contain numerous structural planes of varying scales, orientations, and intersections, resulting in significant heterogeneity, anisotropy, and discontinuity. These characteristics significantly impact the stability of engineering rock masses. Therefore, experimental research on the mechanical properties of jointed rock masses is of great importance to rock engineering. Compared to rock joint surfaces prepared by artificially cast concrete, natural rock joint surfaces typically exhibit irregular and rough characteristics. There are generally two methods for obtaining rough rock joint surfaces in the laboratory: one is to directly drill and cut jointed rock blocks from outdoor natural rock masses as experimental specimens; the other is to conduct Brazilian splitting tests on intact rock specimens to obtain split joint surfaces.

[0003] Core drilling can yield rock specimens with multiple sets of intersecting joints, but the size of these specimens is limited by the drill bit size, and it is difficult to further increase their size. Because multiple joint surfaces formed by conventional splitting methods are difficult to interconnect and the dip angle of the joint surfaces is prone to deflection, current Brazilian splitting tests yield rock specimens with a single joint surface. Since natural engineering rock masses typically contain multiple (or sets of) intersecting joints, a single-joint rock specimen cannot reflect the combined mechanical effects formed by multiple sets of intersecting joints. Furthermore, experimental studies of the mechanical properties of jointed rock masses usually utilize rock specimens with multiple sets of intersecting joints. Therefore, single-joint specimens obtained through traditional Brazilian splitting tests are not suitable for experimental research on the mechanical properties of jointed rock masses.

[0004] Therefore, it is necessary to design an apparatus that can generate rock samples with a specific dip angle and containing multiple (sets) of intersecting joints. Summary of the Invention

[0005] In view of this, the present invention provides a rock specimen preparation device and preparation method containing multiple cross joints, the main purpose of which is to solve the problem that the traditional Brazilian splitting test cannot obtain rock specimens with multiple cross joints.

[0006] To address the aforementioned problems, this application provides a rock sample preparation apparatus containing multiple intersecting joints, comprising:

[0007] A lateral restraint device is provided, which is mounted on a loading device and slides up and down on the loading device. The lateral restraint device has a reserved space in which a rock sample is placed. The lateral restraint device is used to clamp the rock sample and apply confining pressure.

[0008] A splitting device is mounted on the loading device and rotates and slides on the loading device. The splitting device is used to split the rock sample at different angles.

[0009] Furthermore, the lateral restraint device includes multiple sets of clamping assemblies, each set of clamping assemblies including a restraint plate and a pressure plate, with a metal connector provided between the restraint plate and the pressure plate.

[0010] Furthermore, the area of ​​the constraint plate is less than or equal to the area of ​​the pressure plate.

[0011] Furthermore, each pair of clamping components is arranged opposite to each other, and the two pairs of clamping components are provided with multiple guide and prestress rods, which are used to guide and maintain the stability of the clamped specimen.

[0012] Furthermore, the guide and prestressed rod are disposed on the bearing plate.

[0013] Furthermore, the splitting device includes an upper splitting blade, a lower splitting blade, a loading unit, and a control unit. The upper splitting blade and the lower splitting blade are mechanically connected to the loading unit, and the loading unit and the control unit are electrically connected.

[0014] Furthermore, both the upper splitting blade and the lower splitting blade are mechanically connected to the loading device via metal connectors;

[0015] The metal connector rotates on the loading device, and the upper splitting blade and the lower splitting blade rotate on the metal connector. The upper splitting blade and the lower splitting blade are placed symmetrically before splitting loading.

[0016] Furthermore, the heads of both the upper splitting blade and the lower splitting blade are wedge-shaped.

[0017] Furthermore, the lower part of the loading device is provided with a base for placing the rock sample before clamping.

[0018] This application also provides a method for preparing rock samples based on the above-mentioned equipment containing multiple intersecting joints, comprising the following steps:

[0019] According to the preset joints, multiple splitting locations were marked on the surface of the rock sample;

[0020] The rock sample is placed on the base, and the lateral restraint device is adjusted to clamp and apply confining pressure to the rock sample;

[0021] Slide the lateral restraint device to a preset height, and rotate the splitting device to the set splitting position;

[0022] The splitting device is loaded, and the loading force is directly transmitted to the rock sample until the preset joint corresponding to the splitting position is formed.

[0023] Adjust the splitting device to other splitting positions to split the rock sample until splitting is completed at all set splitting positions.

[0024] The beneficial effects of this application are as follows: The present invention provides a rock sample preparation device and method containing multiple intersecting joints. The rock sample is held by a lateral constraint device and a confining pressure is applied to the rock sample. When the splitting device splits the rock sample, the joint surfaces generated by the splitting rock sample are more likely to be interconnected due to the confining pressure applied by the lateral constraint device. Moreover, the preset joint surfaces are less likely to deflect or shift at the edge of the sample and deviate from the preset dip angle or direction. The rock sample does not move arbitrarily under the clamping of the lateral constraint device, which effectively ensures that the subsequent joint surfaces are split and generated in the existing jointed sample. This effectively solves the problems of difficulty in interconnecting multiple (groups) of joint surfaces and easy crack deflection at the edge of the rock sample, reduces the difficulty of sample preparation, improves the success rate of sample preparation, and provides an important foundation for experimental research on the mechanical properties of jointed rock masses.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 A schematic diagram of a rock sample preparation device containing multiple intersecting joints, which is an exemplary embodiment of the present invention;

[0028] Figure 2 A top view of a lateral restraint device in a rock sample preparation apparatus containing multiple intersecting joints, as an exemplary embodiment of the present invention;

[0029] Figure 3 A cross-sectional view of a lateral restraint device and a splitting device for a rock sample preparation apparatus containing multiple intersecting joints, as an exemplary embodiment of the present invention;

[0030] Figure 4A top view of a lateral restraint device and a splitting device for a rock sample preparation apparatus containing multiple intersecting joints, as an exemplary embodiment of the present invention;

[0031] Figure 5 A front view of a lateral restraint device and a splitting device for a rock sample preparation apparatus containing multiple intersecting joints, as an exemplary embodiment of the present invention;

[0032] Figure 6 A perspective view of a lateral restraint device and a splitting device for a rock sample preparation apparatus containing multiple intersecting joints, as an exemplary embodiment of the present invention;

[0033] Figure 7 This is a flowchart illustrating a method for preparing a rock sample containing multiple intersecting joints, which is an exemplary embodiment of the present invention.

[0034] Figure 8 A schematic diagram of the joint surface of a rock specimen after primary splitting, which is an exemplary embodiment of the present invention, for preparing a rock specimen containing multiple intersecting joints.

[0035] Figure 9 A schematic diagram of the joint surface of a rock specimen after secondary splitting, which is an exemplary embodiment of the present invention, for preparing a rock specimen containing multiple intersecting joints.

[0036] Figure 10 This is a schematic diagram of the joint surfaces of a rock specimen after three splits, which is an exemplary embodiment of the present invention for preparing a rock specimen containing multiple intersecting joints.

[0037] In the figure: 1-lateral restraint device, 2-loading device, 3-rock sample, 4-splitting device, 11-restraint plate, 12-pressure plate, 13-metal connector, 14-guide and prestressed rod, 15-fastening nut, 41-upper splitting blade, 42-lower splitting blade, 51-joint surface No. 1, 52-joint surface No. 2, 53-joint surface No. 3. Detailed Implementation

[0038] To overcome the deficiencies in the prior art, this invention provides a device and method for preparing rock samples containing multiple intersecting joints. To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0039] See Figure 1 The present invention provides a rock sample preparation device containing multiple intersecting joints, comprising:

[0040] Lateral restraint device 1 is mounted on loading device 2 and slides up and down on loading device 2. Lateral restraint device 1 has reserved space in which rock sample 3 is placed. Lateral restraint device 1 is used to clamp rock sample 3 and apply confining pressure.

[0041] The splitting device 4 is mounted on the loading device 2 and rotates and slides on the loading device 2. The splitting device 4 is used to split the rock sample 3 at different angles.

[0042] Specifically, the lateral restraint device is adjusted to clamp the rock sample and apply confining pressure. When the splitting device splits the rock sample, it is rotated to a preset position on the loading device. Due to the confining pressure applied by the lateral restraint device, the joint surfaces generated by splitting the rock sample are more likely to intersect each other, and the preset joint surfaces are less likely to deviate or shift at the sample edges, thus avoiding deviation from the preset dip angle or strike. After splitting to form a joint surface, the placement of the rock specimen is adjusted to split the next joint surface. Under the clamping of the lateral restraint device, the rock sample does not move arbitrarily, effectively ensuring that subsequent joint surfaces are generated within the existing jointed sample without overall fragmentation or shifting, maintaining its integrity and stability.

[0043] Compared with existing technologies, the rock sample preparation equipment with multiple intersecting joints in this application clamps the rock sample with a lateral constraint device and applies confining pressure to the rock sample. When the splitting device splits the rock sample, the joint surfaces generated by the split rock sample are more likely to be interconnected due to the confining pressure applied by the lateral constraint device. Moreover, the preset joint surfaces are less likely to deflect or shift at the edge of the sample and deviate from the preset dip angle or direction. The rock sample does not move arbitrarily under the clamping of the lateral constraint device, which effectively ensures that subsequent joint surfaces are split and generated in the existing joint sample. This effectively solves the problems of difficulty in interconnecting multiple (groups) of joint surfaces and easy crack deflection at the edge of the rock sample, reduces the difficulty of sample preparation, improves the success rate of sample preparation, and provides an important foundation for experimental research on the mechanical properties of jointed rock masses.

[0044] In one embodiment, see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The lateral restraint device 1 includes multiple sets of clamping components. Each set of clamping components includes a restraint plate 11 and a pressure plate 12. A metal connector 13 is provided between the restraint plate 11 and the pressure plate 12. The area of ​​the restraint plate 11 is less than or equal to the area of ​​the pressure plate 12.

[0045] Specifically, the lateral restraint device has four sets of clamping components, with each pair of clamping components arranged opposite to each other. Each set of clamping components includes a restraint plate, a pressure plate, and a metal connector between the restraint plate and the pressure plate. The height of the restraint plate is equal to or less than the height of the pressure plate, and the width of the restraint plate is less than or equal to the width of the pressure plate. The four restraint plates form a space in which the rock sample is placed. By adjusting the pressure plate, due to the action of the metal connector, the pressure plate moves the restraint plate to clamp the rock sample, thus holding the rock sample and applying sufficient confining pressure to fix the specimen. When the splitting device splits the rock sample, under the clamping of the restraint plate and the pressure plate, the joint surfaces generated by splitting the rock sample are more likely to be interconnected, and the preset joint surfaces are less likely to deflect or shift at the edge of the sample, thus deviating from the preset dip angle or strike.

[0046] In a preferred embodiment of this invention, the pressure plate 12, the constraint plate 11, and the metal connector 13 are integrally formed.

[0047] In another preferred embodiment of this invention, the metal connector 13 is welded to the pressure plate 12 and the constraint plate 11.

[0048] In another preferred embodiment of this invention, the metal connector 13 is fixed to the pressure plate 11 and the constraint plate 12 by bolts.

[0049] In one embodiment, see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Each pair of clamping components is arranged opposite to each other, and the two pairs of clamping components are provided with multiple guide and prestress rods 14. The guide and prestress rods 14 are arranged on the bearing plate 12 and are used to guide and maintain the stability of the clamped specimen.

[0050] In a preferred embodiment of this invention, multiple guide and prestressing rods 14 are mounted on the edges of two opposing pressure plates 12. Each pressure plate 12 has through holes. One end of each guide and prestressing rod 14 is fixed to the outer side of one pressure plate 12 by a fastening nut 15. The other end of the guide and prestressing rod 14 passes through the through hole of the pressure plate 12, enters the inner side of the pressure plate 12, extends into the corresponding through hole of the opposing pressure plate 12, exits the through hole of the other pressure plate 12, and extends to the outer side of the other pressure plate 12, where it is fixed to the outer side by a fastening nut 15. The guide and prestressing rods 14 constrain the opposing pressure plates 12, preventing deformation of the pressure plates 12 during splitting by the splitting device.

[0051] Adjusting the fastening nut is equivalent to adjusting the pressure plate. The pressure plate drives the constraint plate to clamp the rock sample, so that the constraint plate holds the rock sample and applies sufficient confining pressure to fix the specimen. When the splitting device splits the rock sample, the joint surfaces generated by the splitting are more likely to be interconnected under the clamping of the constraint plate and the pressure plate. Moreover, the preset joint surfaces are less likely to deflect or shift at the edge of the sample and deviate from the preset dip angle or direction.

[0052] In one embodiment, see Figure 3 and Figure 5 The splitting device includes an upper splitting blade 4-1, a lower splitting blade 4-2, a loading unit, and a control unit. The upper splitting blade 4-1 and the lower splitting blade 4-2 are mechanically connected to the loading unit, and the loading unit and the control unit are electrically connected.

[0053] Specifically, the top surface of the rock sample is equipped with an upper splitting blade, and the bottom surface of the rock sample is equipped with a lower splitting blade. The upper and lower splitting blades split the rock sample simultaneously. The control unit controls the loading unit to output pressure, and the loading unit applies pressure to the upper and lower splitting blades to split the rock sample.

[0054] It should be noted that the composition of the loading unit and the control unit is existing technology and will not be described in detail here.

[0055] In one specific embodiment of the present invention, the upper splitting blade 4-1 and the lower splitting blade 4-2 are both connected to the loading device 2 via metal connectors; the metal connectors rotate on the loading device 2, and the upper and lower splitting blades rotate on the metal connectors, and the upper and lower splitting blades are placed symmetrically before splitting loading.

[0056] Specifically, the upper and lower splitting blades are each connected to a metal connector, which is slidably connected to the loading device. This allows the metal connector to slide up and down or rotate on the loading device, thereby causing the upper and lower splitting blades to slide up and down or rotate on the loading device. The upper and lower splitting blades can also move freely on the metal connectors, but they need to be placed symmetrically before splitting loading to ensure that they split into continuous joints.

[0057] In one specific embodiment of the present invention, the heads of both the upper splitting blade and the lower splitting blade are wedge-shaped.

[0058] Specifically, the wedge-shaped blade makes the blade sharper, easier to split, and improves splitting efficiency and splitting effect.

[0059] In one embodiment, the lower part of the loading device 2 is provided with a base for placing the rock sample 3 before clamping.

[0060] Specifically, the loading device has a fixed base at the bottom. When clamping and applying confining pressure to the rock sample, the rock sample is placed on the base, the lateral restraint device is adjusted so that the lateral restraint device clamps the rock sample, and the height of the lateral restraint device is adjusted so that the rock sample is removed from the base.

[0061] In one specific embodiment of the present invention, the base slides up and down on the loading device. After the lateral constraint device clamps the rock sample, the height of the base is adjusted to detach the base from the rock sample.

[0062] See Figure 7 The present invention provides a method for preparing a rock sample based on the above-mentioned equipment containing multiple intersecting joints, comprising the following steps:

[0063] 102: Mark multiple splitting locations on the surface of the rock sample according to the preset joints;

[0064] 104: Place the rock sample on the base, and adjust the lateral restraint device to clamp the rock sample and apply confining pressure;

[0065] 106: Slide the lateral restraint device to the preset height, and rotate the splitting device to the set splitting position;

[0066] 108: Load the splitting device and transfer the loading force to the rock sample until the preset joint corresponding to the splitting position is formed;

[0067] 110: Adjust the splitting device to other splitting positions to split the rock sample until splitting is completed at all preset splitting positions.

[0068] In one embodiment, a rock specimen with multiple intersecting joints and three joint surfaces is prepared. The joint surfaces are numbered according to the order of splitting, and splitting is performed using the following steps:

[0069] Step 1: Lay out and mark the joints on the sample surface, marking the splitting points. This yields a cubic sandstone sample with a smooth, polished surface, an edge length of 200 mm, and an average uniaxial compressive strength of 80 MPa. Lay out and mark the multiple (groups) of joints to be split on the surface of the intact rock sample, and mark the splitting point numbers.

[0070] Step 2: Placement of the apparatus and sample. After marking the joint surface, place the complete rock sample in the center of the base. Adjust the lateral constraint plate to align with the rotation center of the sample side, and ensure that the upper and lower surfaces of the sample are 10mm higher than the edge of the constraint plate. Mark the four sides of the rock sample to ensure accurate loading position when applying confining pressure.

[0071] Step 3: Adjust the clamping device and apply confining pressure. Adjust the position of the constraint plate, draw lines to mark the joints on the side of the rock sample, and make the lateral constraint plate fit tightly against the surface of the rock sample. Apply a confining pressure of 10 MPa.

[0072] Step 4: Place the splitting device and preload pressure. After applying confining pressure, raise the sample 50mm off the base and place the lower splitting blade. Adjust the position and orientation of the lower splitting blade to the target splitting position, and lower the rock sample until the lower surface is tightly against the lower splitting blade. Adjust the position and orientation of the upper splitting blade to the target splitting position, and place the upper splitting blade tightly against the upper surface of the rock sample. Preload a pressure of 5KN onto the upper and lower splitting blades to compress the sample;

[0073] Step 5: Splitting the rock sample. After preloading, confirm the splitting blade is accurately positioned, and continue applying pressure to the splitting blade head until the rock sample is split and destroyed, obtaining a sandstone specimen containing joint surface 51 (number 1). Figure 8 As shown;

[0074] Step Six: Continue splitting until specimen preparation is complete. Remove the split rock specimen and repeat steps two through five on the same specimen to sequentially split the subsequent marked joints, obtaining through joint surface 52 (No. 2) and joint surface 53 (No. 3), as shown below. Figure 9 and Figure 10As shown. Thus, a square sandstone specimen with three intersecting joints and an edge length of 200 mm has been prepared.

[0075] Compared with existing technologies, the method for preparing rock samples with multiple intersecting joints in this application uses a lateral constraint device to clamp the rock sample and applies sufficient confining pressure to fix the sample. When the splitting device splits the rock sample, the joint surfaces generated by the splitting rock sample are more likely to intersect each other due to the confining pressure applied by the lateral constraint device. Furthermore, the pre-set joint surfaces are less likely to deflect or shift at the edge of the sample and deviate from the pre-set dip angle or strike. The rock sample does not move arbitrarily under the clamping of the lateral constraint device, which effectively ensures that subsequent joint surfaces are generated in the existing jointed sample. This method effectively solves the problems of difficulty in intersecting and connecting multiple (groups) of joint surfaces and the easy generation of cracks and deflection at the edge of the rock sample. It reduces the difficulty of sample preparation, improves the success rate of sample preparation, and provides an important foundation for experimental research on the mechanical properties of jointed rock masses.

[0076] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope of this application will be apparent to those skilled in the art.

[0077] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0078] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0079] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0080] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0081] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0082] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0083] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A method for preparing rock samples based on a device for preparing rock samples with multiple intersecting joints, characterized in that, include: The rock sample preparation equipment includes: a lateral restraint device, which is mounted on a loading device and slides up and down on the loading device. The lateral restraint device has a reserved space in which a rock sample is placed. The lateral restraint device is used to clamp the rock sample and apply confining pressure. A splitting device is mounted on the loading device and rotates and slides on the loading device. The splitting device is used to split the rock sample at different angles. The preparation method includes: According to the preset joints, multiple splitting locations were marked on the surface of the rock sample; The rock sample is placed on the base of the loading device, and the lateral constraint device is adjusted to clamp and apply confining pressure to the rock sample. Slide the lateral restraint device to a preset height, and rotate the splitting device to the set splitting position; The splitting device is loaded, and the loading force is transmitted to the rock sample until a preset joint corresponding to the splitting position is formed. Adjust the splitting device to other splitting positions to split the rock sample until splitting is completed at all set splitting positions.

2. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 1, characterized in that, The lateral restraint device includes multiple sets of clamping assemblies, each set of clamping assemblies including a restraint plate and a pressure plate, and a metal connector is provided between the restraint plate and the pressure plate.

3. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 2, characterized in that, The area of ​​the constraint plate is less than or equal to the area of ​​the pressure plate.

4. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 2, characterized in that, Each pair of clamping components is arranged opposite to each other, and the two pairs of clamping components are provided with multiple guide and prestressed rods, which are used to guide and maintain the stability of the clamped specimen.

5. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 4, characterized in that, The guide and prestressed rods are mounted on the bearing plate.

6. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 1, characterized in that, The splitting device includes an upper splitting blade, a lower splitting blade, a loading unit, and a control unit. The upper splitting blade and the lower splitting blade are respectively connected to the loading unit, and the loading unit and the control unit are electrically connected.

7. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 6, characterized in that, Both the upper splitting blade and the lower splitting blade are connected to the loading device via metal connectors; The metal connector rotates on the loading device, and the upper splitting blade and the lower splitting blade rotate on the metal connector. The upper splitting blade and the lower splitting blade are placed symmetrically before splitting loading.

8. The preparation method of a rock sample preparation device based on multiple intersecting joints according to claim 6 or 7, characterized in that, Both the head of the upper splitting blade and the head of the lower splitting blade are wedge-shaped.

9. The preparation method of the rock sample preparation device based on multiple intersecting joints according to claim 1, characterized in that, The loading device has a base at its lower part, which is used to place the rock sample before clamping.

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