Rock mechanical simulation experiment equipment and method

Abstract

The invention discloses rock mechanical simulation experiment equipment and method, and particularly relates to the field of rock detection.The rock mechanical simulation experiment equipment comprises a workbench, a base and a support are installed on the workbench, a lower steel column is placed on the base, and a first linear driving component is fixedly installed at the top of the support; a mounting plate is fixedly mounted at the output end of the linear driving part I, an upper steel column is mounted at the bottom of the mounting plate, and during a Brazilian splitting experiment, the linear driving part I drives the upper steel column to move downwards, so that the lower steel column and the upper steel column apply a load to the rock cylinder test piece. The two vertical and parallel centering plates are adopted to clamp the rock cylinder test piece to achieve the centering purpose, even if the centering plates apply large force to the rock cylinder test piece, the rock cylinder test piece cannot be suspended, and therefore during an experiment, even if the centering plates are removed, the rock cylinder test piece cannot deviate, and the test efficiency is improved. And the normal proceeding of the experiment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of rock detection, and more specifically, to a rock mechanics simulation experiment device and method. Background Art

[0002] Since rock is a typical brittle material, it is extremely difficult to determine its tensile strength by direct tensile experiments. Therefore, the Brazilian splitting test is used as an indirect method for measuring the tensile strength of rocks. During the splitting test, two support members are placed in the diameter direction of a cylindrical specimen, and opposite linear loads are applied to cause the specimen to fail radially, thereby indirectly measuring the tensile strength of the specimen.

[0003] Before the experiment, it is necessary to place the specimen and align it. The so-called alignment aims to make the straight line where the two support members contact the cylindrical specimen and the axis of the cylindrical specimen lie in a vertical plane. The support members are generally flat or cylindrical steel columns. For flat support members, currently, two V-shaped clamping plates are used. The support member is located between the two clamping plates. After placing the specimen on the support member, the two clamping plates are driven by a power source to swing towards the middle, contact and clamp the two support members. In this way, the purpose of alignment can be achieved.

[0004] However, if the support member is a cylindrical steel column, when the cylindrical specimen is placed between the two clamping plates, the cylindrical specimen can only be located on one side of the cylindrical steel column and cannot be located on the top of the cylindrical steel column. That is to say, it is necessary for the clamping plates to push the cylindrical specimen to the top of the cylindrical steel column. This process requires a certain amount of force, and it is easy for the power source to drive the clamping plates to over-clamp, causing the cylindrical specimen to be suspended, that is, there is a certain distance between the bottom of the cylindrical specimen and the cylindrical steel column. During the Brazilian splitting test, it is necessary to remove the clamping plates to prevent them from affecting the experiment. When the clamping plates are removed, the cylindrical specimen will inevitably fall downward and shake, resulting in the failure of alignment and deviation during the Brazilian splitting test, that is, the cylindrical specimen is likely to deviate from the cylindrical steel column to one side. Summary of the Invention

[0005] The rock mechanics simulation experiment device and method provided by the present invention aim to solve the problem that when the clamping plates are removed during the Brazilian splitting test, the cylindrical specimen falls downward and shakes due to suspension, resulting in the failure of alignment and easy deviation during the experiment.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rock mechanics simulation experimental equipment, including a workbench, a base and a bracket are installed on the workbench, a lower steel column is placed on the base, a linear drive component 1 is fixedly installed on the top of the bracket, a mounting plate is fixedly installed on the output end of the linear drive component 1, and an upper steel column is installed on the bottom of the mounting plate. During the Brazilian splitting experiment, the linear drive component 1 drives the upper steel column to move downward, so that the lower steel column and the upper steel column apply a load to the rock cylinder specimen; a centering component is arranged on the base, and the centering component includes two centering plates respectively slidably arranged on both sides of the base, the two centering plates are arranged in parallel and an elastic component is pressed between them. First, one end of the two centering plates is hinged with a connecting rod, and the ends of the two connecting rods away from the centering plates are rotatably connected to the same rotating sleeve. A linear drive component 2 is installed on the workbench, and a support seat is fixedly installed on the output end of the linear drive component 2. A plug-in shaft is slidably inserted at the upper end of the support seat, and the plug-in shaft is inserted in the middle of the rotating sleeve; the axes of the lower steel column, the upper steel column and the rotating sleeve are in the same vertical plane; the rock mechanics simulation experimental equipment also includes a pushing component, and when the linear drive component 1 drives the upper steel column to move downward and contact with the rock cylindrical specimen, the pushing component pushes the plug-in shaft out of the rotating sleeve, so that the elastic component 1 pushes the two centering plates away from each other and out of contact with the rock cylindrical specimen.

[0007] In a preferred embodiment, the pushing assembly includes a positioning plate, the side walls of the two centering plates are provided with straight grooves, the two ends of the positioning plate are respectively inserted into the two straight grooves, a shift fork is installed on the positioning plate, and two fork rods are vertically arranged at the front end of the shift fork. The two fork rods are inserted on both sides of the end of the plug shaft and pressed against the end of the plug shaft.

[0008] In a preferred embodiment, a transmission component is provided on the side of the two centering plates away from each other, and the transmission component includes a fixed shaft, which is fixedly connected to the centering plate, and a movable block is provided on the sliding sleeve of the fixed shaft. An elastic component three is provided on the fixed shaft, and the elastic component three is used to reset the movable block to the side away from the pushing assembly. The movable block is located on the side of the positioning plate away from the fork.

[0009] In a preferred embodiment, a slope is provided on one side of the upper end of the movable block away from the positioning plate, and vertical rods are fixedly connected to both sides of an output end of the linear drive component, and the two vertical rods are respectively provided directly above the two slopes.

[0010] In a preferred embodiment, the shift fork is movably connected to the positioning plate, one end of the shift fork away from the positioning plate is fixedly connected to a fixing block, an elastic component 2 is sleeved on the outer side of the shift fork, and both ends of the elastic component 2 are respectively pressed against the positioning plate and the fixing block.

[0011] In a preferred embodiment, a spiral groove is provided on the inner wall of the rotating sleeve, a protrusion is fixedly connected to the end of the plug-in shaft, the protrusion slides in the spiral groove, the surfaces of the two connecting rods in contact with the rotating sleeve are both provided with damping sleeves, and an inner groove is provided on the side of the support seat close to the rotating sleeve.

[0012] In a preferred embodiment, an upper V-shaped groove is provided at the bottom of the mounting plate, the upper steel column is located inside the upper V-shaped groove, and one end of the upper steel column is fixedly connected to the mounting plate, and a lower V-shaped groove is provided on the upper surface of the base, and the lower steel column is located inside the lower V-shaped groove.

[0013] In a preferred embodiment, both sides of the base are fixedly connected with guide shafts, two centering plates are slidably arranged on the guide shafts, an elastic component is set on the guide shafts, and both ends of the elastic component are respectively pressed with the two centering plates.

[0014] In a preferred embodiment, a feeding assembly is installed on the workbench, and the feeding assembly is arranged on the side of the base away from the pushing assembly. The feeding assembly includes a linear drive component three, and a support platform is arranged between the linear drive component three and the base. Two support bars arranged in parallel are arranged on the upper surface of the support platform, and the two support bars are used to support the rock cylindrical specimen.

[0015] The present invention also provides a rock mechanics simulation experimental method, using the above-mentioned rock mechanics simulation experimental equipment, comprising the following steps.

[0016] Step 1: Place the rock cylinder specimen between two centering plates.

[0017] Step 2: The support seat is driven downward by the linear drive component 2, so that the two connecting rods pull the two centering plates closer to each other, thereby clamping the rock cylinder specimen and completing the centering.

[0018] Step three, when the linear drive component drives the upper steel column to move downward and contact the rock cylindrical specimen, the push assembly pushes the insertion shaft out of the rotating sleeve, so that the elastic component pushes the two centering plates away from each other and out of contact with the rock cylindrical specimen.

[0019] Step 4: The linear drive component drives the upper steel column to move downward, so that the lower steel column and the upper steel column apply load to the rock cylinder specimen to perform a Brazilian splitting experiment.

[0020] Technical effects and advantages of the present invention: The present invention achieves the purpose of centering by adopting two vertically and parallelly arranged centering plates to clamp the rock cylindrical specimen. Even if the centering plates apply a large force to the rock cylindrical specimen, the rock cylindrical specimen will not be suspended in the air. Therefore, during the experiment, even if the centering plates are removed, the rock cylindrical specimen will not deviate, thereby ensuring the normal progress of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 。

[0022] Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 。

[0023] Figure 3 Schematic diagram of the partial structure of the present invention Figure 1 。

[0024] Figure 4 Schematic diagram of the partial structure of the present invention Figure 2 。

[0025] Figure 5 Schematic diagram of the structure for mounting the centering component of the present invention.

[0026] Figure 6 Schematic diagram of the structure for mounting the pushing component of the present invention.

[0027] Figure 7 For the present invention Figure 6 Cross-sectional view.

[0028] Figure 8 Schematic diagram of two V-shaped arranged clamping plates clamping a rock cylindrical specimen when using a flat support and a lower steel column.

[0029] Figure 9 Schematic diagram of the process flow of the rock mechanics simulation experiment method of the present invention.

[0030] Reference numerals are: 1, base; 10, guide shaft; 11, lower steel column; 12, lower V-shaped groove; 2, bracket; 20, linear driving component one; 21, mounting plate; 22, upper steel column; 23, upper V-shaped groove; 3, centering component; 30, linear driving component two; 31, centering plate; 311, straight groove; 32, elastic component one; 33, connecting rod; 331, damping sleeve; 34, rotating sleeve; 341, spiral groove; 35, inserting shaft; 351, protrusion; 36, support seat; 361, inner groove; 4, pushing component; 41, positioning plate; 42, fork; 421, fork rod; 43, fixing block; 44, elastic component two; 5, transmission component; 51, fixed shaft; 52, movable block; 521, inclined surface; 53, elastic component three; 6, vertical rod; 7, feeding component; 71, linear driving component three; 72, support table; 73, support bar; 8, flat support; 9, clamping plate; 100, workbench; 200, rock cylindrical specimen. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0032] As Figure 8 (1) shows, a rock cylinder specimen 200 is placed on a flat support 8, and then the rock cylinder specimen 200 is centered by two clamping plates 9. When centering, it is only necessary to ensure that the two clamping plates 9 are in contact with the side wall of the rock cylinder specimen 200, and no large force needs to be applied. And as Figure 8 (2) shows, when placing the rock cylinder specimen 200, as shown by the dotted circle in the figure, the rock cylinder specimen 200 can only be located on one side of the lower steel column 11. When using two clamping plates 9 to center the rock cylinder specimen 200, a certain force is required to push the rock cylinder specimen 200 above the lower steel column 11. At this time, the power source drives the clamping plate 9 to easily clamp excessively, causing the rock cylinder specimen 200 to be suspended, as shown by the solid circle in the figure, with a small distance from the lower steel column 11. During the experiment, when the clamping plate 9 is removed, the rock cylinder specimen 200 is likely to fall out from both sides of the lower steel column 11 when it falls, that is, it runs off course.

[0033] Referring to the attached Figures 1 - 9 description, a rock mechanics simulation experiment device includes a workbench 100. A base 1 and a bracket 2 are installed on the workbench 100. A lower steel column 11 is placed on the base 1. A linear driving component one 20 is fixedly installed at the top of the bracket 2. The output end of the linear driving component one 20 is fixedly installed with a mounting plate 21. A upper steel column 22 is installed at the bottom of the mounting plate 21. During the Brazilian splitting test, the linear driving component one 20 drives the upper steel column 22 to move downward, so that the lower steel column 11 and the upper steel column 22 apply a load to the rock cylinder specimen 200.

[0034] It should be noted that the linear driving component one 20 adopts a hydraulic cylinder. Both the lower steel column 11 and the upper steel column 22 are cylinders. During the Brazilian splitting test, the rock cylinder specimen 200 is placed between the lower steel column 11 and the upper steel column 22, so that the axes of the lower steel column 11, the upper steel column 22 and the rock cylinder specimen 200 are in the same vertical plane, and then the experiment is carried out.

[0035] Furthermore, as Figure 4 shown, an upper V-shaped groove 23 is opened at the bottom of the mounting plate 21. The upper steel column 22 is located inside the upper V-shaped groove 23, and one end of the upper steel column 22 is fixedly connected to the mounting plate 21. A lower V-shaped groove 12 is opened on the upper surface of the base 1. The lower steel column 11 is located inside the lower V-shaped groove 12.

[0036] It should be noted that by providing the upper V-shaped groove 23 and the lower V-shaped groove 12, the stability of the upper steel column 22 and the lower steel column 11 during the experiment can be improved.

[0037] In this embodiment, as Figures 3 - 5 shown, a centering assembly 3 is provided on the base 1. The centering assembly 3 includes two centering plates 31 that are respectively slidably disposed on both sides of the base 1. The two centering plates 31 are arranged in parallel and an elastic member 32 is pressed between them. One end of each of the two centering plates 31 is hinged with a connecting rod 33. The ends of the two connecting rods 33 away from the centering plates 31 are rotatably connected to the same rotating sleeve 34. A linear driving member 30 is installed on the workbench 100. The output end of the linear driving member 30 is fixedly installed with a support seat 36. A plug shaft 35 is slidably inserted into the upper end of the support seat 36. The plug shaft 35 is inserted into the middle of the rotating sleeve 34; the axes of the lower steel column 11, the upper steel column 22 and the rotating sleeve 34 are in the same vertical plane;

[0038] Furthermore, guide shafts 10 are fixedly connected to both sides of the base 1. The two centering plates 31 are slidably disposed on the guide shafts 10. The elastic member 32 is sleeved on the guide shafts 10, and the two ends of the elastic member 32 are respectively pressed against the two centering plates 31.

[0039] It should be noted that when the linear driving member 30 drives the support seat 36 to move downward, the two centering plates 31 can be made to approach each other. Among them, the linear driving member 30 is a cylinder, and the elastic member 32 is a compression spring.

[0040] In this embodiment, the rock mechanics simulation experiment device further includes a pushing assembly 4. When the linear driving member 20 drives the upper steel column 22 to move downward to contact the rock cylinder specimen 200, the pushing assembly 4 pushes the plug shaft 35 out of the rotating sleeve 34, so that the elastic member 32 pushes the two centering plates 31 away from each other and disengages from the rock cylinder specimen 200.

[0041] In this embodiment, the implementation method is as follows: When conducting the Brazilian splitting test, first place the rock cylindrical specimen 200 between two centering plates 31, and then perform centering operation on the rock cylindrical specimen 200. During centering, the linear driving component II 30 drives the support base 36 to move downward. The support base 36 pulls the connecting rod 33 downward through the insertion shaft 35 and the rotating sleeve 34. The two connecting rods 33 respectively pull the two centering plates 31 towards the middle, so that the two centering plates 31 clamp the rock cylindrical specimen 200, and thus the centering is completed. During the test, the linear driving component I 20 drives the mounting plate 21 and the upper steel column 22 to move downward. When the upper steel column 22 contacts the rock cylindrical specimen 200, it is necessary to remove the centering plate 31, that is, release the clamping of the centering plate 31 on the rock cylindrical specimen 200. When releasing, the insertion shaft 35 is pushed out of the rotating sleeve 34 through the pushing component 4. In this way, the rotating sleeve 34 is separated from the support base 36, and the connecting rod 33 loses the downward pulling force. Under the action of the elastic component I 32, the two centering plates 31 are pushed away from each other, so as to achieve the purpose of releasing the clamping of the centering plate 31 on the rock cylindrical specimen 200. Among them, the pushing component 4 can adopt a cylinder, and the insertion shaft 35 is pulled out by the cylinder.

[0042] The above technical solution realizes the centering purpose by clamping the rock cylindrical specimen 200 with two vertically and parallelly arranged centering plates 31. Even if a large force is applied to the rock cylindrical specimen 200 by the centering plates 31, the rock cylindrical specimen 200 will not be suspended. Therefore, during the test, even if the centering plates 31 are removed, the rock cylindrical specimen 200 will not deviate, ensuring the normal progress of the test.

[0043] In the above technical solution, it is necessary to remove the centering plate 31 when the upper steel column 22 contacts the rock cylindrical specimen 200, that is, when the lower steel column 11 and the upper steel column 22 apply a certain force to the rock cylindrical specimen 200 to balance the rock cylindrical specimen 200. However, when the upper steel column 22 contacts the rock cylindrical specimen 200 depends on human observation, and relying on feeling to judge is subjective, and it is easy to have the problem of removing the centering plate 31 before the upper steel column 22 contacts the rock cylindrical specimen 200. Therefore, in this embodiment, another specific structural form of the pushing component 4 is provided.

[0044] Refer to the attached Figures 3 - 7 Specifically, a pushing component 4, a transmission component 5 and a vertical rod 6 are provided. The pushing component 4 includes a positioning plate 41. Straight grooves 311 are opened on the side walls of the two centering plates 31. The two ends of the positioning plate 41 are respectively inserted into the two straight grooves 311. A fork 42 is installed on the positioning plate 41. Two fork rods 421 are vertically arranged at the front end of the fork 42. The two fork rods 421 are inserted on both sides of the end of the insertion shaft 35 and are pressed against the end of the insertion shaft 35.

[0045] Furthermore, the shift fork 42 is movably inserted into the positioning plate 41. A fixing block 43 is fixedly connected to one end of the shift fork 42 away from the positioning plate 41. An elastic member II 44 is sleeved outside the shift fork 42, and two ends of the elastic member II 44 are respectively pressed against the positioning plate 41 and the fixing block 43.

[0046] Furthermore, transmission components 5 are arranged on one sides of the two centering plates 31 away from each other. The transmission component 5 includes a fixed shaft 51 fixedly connected to the centering plate 31. A movable block 52 is slidably sleeved on the fixed shaft 51. An elastic member III 53 is sleeved on the fixed shaft 51 and is used to reset the movable block 52 to the side away from the pushing component 4. The movable block 52 is located on the side of the positioning plate 41 away from the shift fork 42.

[0047] Furthermore, an inclined surface 521 is arranged on one side of the upper end of the movable block 52 away from the positioning plate 41. Vertical rods 6 are fixedly connected to both sides of the output end of the linear driving component I 20, and the two vertical rods 6 are respectively arranged directly above the two inclined surfaces 521.

[0048] Furthermore, a spiral groove 341 is formed in the inner wall of the rotating sleeve 34. A protrusion 351 is fixedly connected to the end of the inserting shaft 35, and the protrusion 351 slides in the spiral groove 341. Damping sleeves 331 are sleeved on the surfaces of the two connecting rods 33 in contact with the rotating sleeve 34. An inner groove 361 is formed on one side of the support base 36 close to the rotating sleeve 34.

[0049] It should be noted that the elastic member II 44 and the elastic member III 53 are compression springs.

[0050] In this embodiment, the implementation method is as follows: During the experiment, first, place the rock cylindrical specimen 200 between the two centering plates 31, and then drive the two centering plates 31 through the second linear driving member 30 to clamp the rock cylindrical specimen 200 to complete centering. Then, the first linear driving member 20 drives the mounting plate 21 and the upper steel column 22 to move downward. When the upper steel column 22 has not yet contacted the rock cylindrical specimen 200, the vertical rod 6 contacts and pushes the inclined surface 521, causing the movable block 52 to push the positioning plate 41 to move. The positioning plate 41 squeezes the second elastic member 44, and the second elastic member 44 squeezes the fixed block 43, causing the fixed block 43 to drive the fork 42 and the fork rod 421 to move. The fork rod 421 pushes the plug shaft 35, aiming to move the plug shaft 35 out of the rotating sleeve 34. However, it should be noted here that a damping sleeve 331 is provided at the rotational connection between the connecting rod 33 and the rotating sleeve 34. Therefore, the rotating sleeve 34 has a certain resistance to rotate relative to the connecting rod 33. During the process of the plug shaft 35 moving out of the rotating sleeve 34, the protrusion 351 slides inside the spiral groove 341, and the plug shaft 35 can only move. Therefore, the rotating sleeve 34 will rotate. Since there is a certain resistance to the rotation between the rotating sleeve 34 and the connecting rod 33, the fork rod 421 pushes the plug shaft 35 out of the rotating sleeve 34, and it cannot be immediately removed but gradually removed, which serves the purpose of delaying. When the plug shaft 35 is removed, the protrusion 351 is located inside the inner groove 361. Thus, when the upper steel column 22 contacts the rock cylindrical specimen 200 and during the process of applying a certain load, the plug shaft 35 moves out of the rotating sleeve 34, and the support seat 36 disengages from the connecting rod 33. Under the action of the first elastic member 32, the two centering plates 31 disengage from the rock cylindrical specimen 200. Then the first linear driving member 20 continues to apply a load downward until the specimen is radially damaged. In this way, when to remove the centering plates 31 is not affected by subjective factors.

[0051] It should also be noted that during the next experiment, just insert the plug shaft 35 back into the rotating sleeve 34.

[0052] Refer to the attached Figures 1 - 2 to the specification, a feeding component 7 is installed on the workbench 100. The feeding component 7 is arranged on one side of the base 1 away from the pushing component 4. The feeding component 7 includes a third linear driving member 71. A support table 72 is arranged between the third linear driving member 71 and the base 1. Two parallel support bars 73 are arranged on the upper surface of the support table 72, and the two support bars 73 are used to support the rock cylindrical specimen 200.

[0053] It should be noted that when loading, the rock cylindrical specimen 200 is placed on two support bars 73, and then the linear drive component 3 71 is used to push the rock cylindrical specimen 200 between the two centering plates 31 to complete the loading. In order to prevent the rock cylindrical specimen 200 from pushing the lower steel column 11 out of the lower V-shaped groove 12, the lower steel column 11 is fixed in the lower V-shaped groove 12.

[0054] Refer to the instruction manual Figure 9 A rock mechanics simulation experimental method, using the above-mentioned rock mechanics simulation experimental equipment, includes the following steps.

[0055] Step 1: Place the rock cylinder specimen 200 between two centering plates 31 .

[0056] Step 2: The support seat 36 is driven downward by the second linear drive component 30, so that the two connecting rods 33 pull the two centering plates 31 closer to each other, thereby clamping the rock cylinder specimen 200 to complete the centering.

[0057] Step three, when the linear drive component 20 drives the upper steel column 22 to move downward and contact the rock cylindrical specimen 200, the push assembly 4 pushes the insertion shaft 35 out of the rotating sleeve 34, so that the elastic component 32 pushes the two centering plates 31 away from each other and out of contact with the rock cylindrical specimen 200.

[0058] Step 4: The linear drive component 20 drives the upper steel column 22 to move downward, so that the lower steel column 11 and the upper steel column 22 apply load to the rock cylinder specimen 200 to perform a Brazilian splitting experiment.

[0059] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rock mechanics simulation experimental device, characterized in that: The invention comprises a workbench (100), wherein a base (1) and a bracket (2) are installed on the workbench (100), a lower steel column (11) is placed on the base (1), a linear drive component (20) is fixedly installed on the top of the bracket (2), a mounting plate (21) is fixedly installed on the output end of the linear drive component (20), and an upper steel column (22) is installed on the bottom of the mounting plate (21); during a Brazilian splitting test, the linear drive component (20) drives the upper steel column (22) to move downward, so that the lower steel column (11) and the upper steel column (22) apply a load to the rock cylindrical specimen (200); The base (1) is provided with a centering component (3), and the centering component (3) comprises two centering plates (31) which are respectively slidably arranged on both sides of the base (1), the two centering plates (31) are arranged in parallel and an elastic component (32) is pressed between them, one end of the two centering plates (31) is hinged with a connecting rod (33), and the ends of the two connecting rods (33) away from the centering plates (31) are rotatably connected to the same rotating sleeve (34), and a linear drive component (30) is installed on the workbench (100), and a support seat (36) is fixedly installed on the output end of the linear drive component (30), and an insertion shaft (35) is slidably inserted at the upper end of the support seat (36), and the insertion shaft (35) is inserted in the middle of the rotating sleeve (34); the axes of the lower steel column (11), the upper steel column (22) and the rotating sleeve (34) are in the same vertical plane; The rock mechanics simulation experimental equipment also includes a pushing assembly (4). When the linear driving component (20) drives the upper steel column (22) to move downward and contact the rock cylindrical specimen (200), the pushing assembly (4) pushes the insertion shaft (35) out of the rotating sleeve (34), so that the elastic component (32) pushes the two centering plates (31) away from each other and out of contact with the rock cylindrical specimen (200).

2. The rock mechanics simulation experiment device according to claim 1, characterized in that: The pushing assembly (4) comprises a positioning plate (41), the side walls of the two centering plates (31) are both provided with straight grooves (311), the two ends of the positioning plate (41) are respectively inserted into the two straight grooves (311), a shift fork (42) is installed on the positioning plate (41), and two fork rods (421) are vertically arranged at the front end of the shift fork (42), and the two fork rods (421) are inserted into the two sides of the end of the insertion shaft (35) and pressed against the end of the insertion shaft (35).

3. A rock mechanics simulation experiment device according to claim 1, characterized in that: A transmission component (5) is provided on the side of the two centering plates (31) away from each other. The transmission component (5) comprises a fixed shaft (51). The fixed shaft (51) is fixedly connected to the centering plate (31). A movable block (52) is slidably sleeved on the fixed shaft (51). An elastic component three (53) is sleeved on the fixed shaft (51). The elastic component three (53) is used to reset the movable block (52) to a side away from the push assembly (4). The movable block (52) is located on a side of the positioning plate (41) away from the shift fork (42).

4. A rock mechanics simulation experiment device according to claim 3, characterized in that: A slope (521) is provided on the side of the upper end of the movable block (52) away from the positioning plate (41), and vertical rods (6) are fixedly connected to both sides of the output end of the linear drive component (20), and the two vertical rods (6) are respectively arranged directly above the two slopes (521).

5. The rock mechanics simulation experimental device according to claim 2, characterized in that: The shift fork (42) is movably plugged with the positioning plate (41); one end of the shift fork (42) away from the positioning plate (41) is fixedly connected to a fixing block (43); an elastic component 2 (44) is sleeved on the outer side of the shift fork (42); and two ends of the elastic component 2 (44) are respectively pressed against the positioning plate (41) and the fixing block (43).

6. The rock mechanics simulation experimental device according to claim 5, characterized in that: The inner wall of the rotating sleeve (34) is provided with a spiral groove (341), the end of the plug shaft (35) is fixedly connected with a protrusion (351), and the protrusion (351) slides in the spiral groove (341), the surfaces of the two connecting rods (33) in contact with the rotating sleeve (34) are both provided with damping sleeves (331), and the side of the support seat (36) close to the rotating sleeve (34) is provided with an inner groove (361).

7. A rock mechanics simulation experimental device according to claim 1, characterized in that: An upper V-shaped groove (23) is provided at the bottom of the mounting plate (21), the upper steel column (22) is located inside the upper V-shaped groove (23), and one end of the upper steel column (22) is fixedly connected to the mounting plate (21), and a lower V-shaped groove (12) is provided on the upper surface of the base (1), and the lower steel column (11) is located inside the lower V-shaped groove (12).

8. A rock mechanics simulation experiment device according to claim 1, characterized in that: Both sides of the base (1) are fixedly connected to a guide shaft (10), the two centering plates (31) are slidably arranged on the guide shaft (10), the elastic component (32) is sleeved on the guide shaft (10), and the two ends of the elastic component (32) are respectively pressed against the two centering plates (31).

9. The rock mechanics simulation experiment device according to claim 1, characterized in that: A feeding assembly (7) is installed on the workbench (100), and the feeding assembly (7) is arranged on a side of the base (1) away from the pushing assembly (4). The feeding assembly (7) comprises a linear drive component (71), and a support platform (72) is arranged between the linear drive component (71) and the base (1). Two support bars (73) arranged in parallel are arranged on the upper surface of the support platform (72), and the two support bars (73) are used to support the rock cylindrical specimen (200).

10. A rock mechanics simulation experiment method, using a rock mechanics simulation experiment device as described in any one of claims 1-9, characterized in that, The following steps are involved: Step 1: placing a rock cylinder specimen (200) between two centering plates (31); Step 2: The support seat (36) is driven to move downward by the second linear drive component (30), so that the two connecting rods (33) pull the two centering plates (31) closer to each other, thereby clamping the rock cylinder specimen (200) to complete the centering; Step 3: When the linear drive component 1 (20) drives the upper steel column (22) to move downward and contact the rock cylindrical specimen (200), the push assembly (4) pushes the insertion shaft (35) out of the rotating sleeve (34), so that the elastic component 1 (32) pushes the two centering plates (31) away from each other and out of contact with the rock cylindrical specimen (200); Step 4: The linear drive component 1 (20) drives the upper steel column (22) to move downward, so that the lower steel column (11) and the upper steel column (22) apply a load to the rock cylinder specimen (200) to conduct a Brazilian splitting test.

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