True triaxial rock loading clamp and loading test device

Abstract

The invention provides a true triaxial rock loading clamp and a loading test device, and belongs to the technical field of detection, and the true triaxial rock loading clamp comprises a pressure applying mechanism, and a rectangular area enclosed by a first top block, a second top block, a third top block and a fourth top block and used for placing a rectangular rock; a first housing; a second housing; the first shell is provided with a first direction displacement measuring assembly, the second shell is provided with a second direction displacement measuring assembly, during a loading test, the loading clamp is arranged in a closed hydraulic oil pressure application environment, the two pressure application mechanisms are respectively used for applying pressure to the second top block and the second shell, and the two pressure application directions are opposite. According to the invention, the first direction displacement measurement assembly and the second direction displacement measurement assembly are respectively installed on the first housing and the second housing, so that the risk of dislocation of the internal structures of the first direction displacement measurement assembly and the second direction displacement measurement assembly in the detection process can be reduced, and the measurement precision can be ensured.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a true triaxial rock loading fixture and a loading test device. Background Art

[0002] The true triaxial rock loading test is a test method used to study the mechanical properties of rocks. It is mainly used to simulate the stress conditions of rocks in geological environments. The test applies triaxial pressure to rock samples, which can more realistically reflect the mechanical behavior of rocks under natural conditions. The true triaxial rock loading test device is a commonly used device for true triaxial rock loading tests. During the working process, in order to accurately apply pressure, maintain the integrity of rock specimens, and facilitate multi-directional loading pressure, the true triaxial rock loading test device usually sets a true triaxial rock loading fixture and configures a suitable rock sample deformation measurement mechanism.

[0003] When conducting true triaxial loading tests on rocks, some manufacturers will use liquid pressurization, but liquid pressurization cannot pressurize a single axis, so some manufacturers will use other methods. Refer to the Chinese patent document with announcement number CN103822573B, entitled A rock sample volume deformation measurement device and measurement method. The patent application document includes a major principal stress measurement unit and a medium principal stress measurement unit. The major principal stress measurement unit includes a first displacement sensor and a first feeler pin. The first displacement sensor is mounted on the pressure plate through a first sensor support, and the first feeler pin is mounted on the pressure plate through a first feeler pin support, and the first feeler pin can contact the first displacement sensor; the medium principal stress measurement unit includes a second displacement sensor and a second feeler pin. The second displacement sensor is mounted on the pressure plate through a second sensor support, and the second feeler pin is mounted on the pressure plate through a second feeler pin support, and the second feeler pin can contact the second displacement sensor.

[0004] Referring to the above technical solution, when pressure is applied to the rock in three directions at the same time, the rock will deform in three directions, so that the distance between the pressure plates in each direction will change. The change in the position of the pressure plates will cause the first displacement sensor and the center position of the first stylus to be misaligned, and the second displacement sensor and the center position of the second stylus to be misaligned, thereby affecting the measurement accuracy. Summary of the invention

[0005] In order to improve the measurement accuracy, the present application provides a true triaxial rock loading fixture and a loading test device.

[0006] In the first aspect, the present application provides a true triaxial rock loading fixture, which adopts the following technical solution: a true triaxial rock loading fixture, comprising two pressure mechanisms, a rectangular area surrounded by a first top block, a second top block, a third top block and a fourth top block, and the rectangular area is used to place rectangular rocks; wherein the first top block is fixed in position, the second top block is slidably arranged on the left side of the upper part of the first top block, the left end of the third top block is slidably connected to the side wall of the upper end of the second top block, the upper end of the fourth top block is slidably connected to the lower end of the right side of the third top block, and the lower end of the fourth top block is slidably connected to the right side of the first top block. The first and second housings are provided with a first housing, and the first housing has a first sliding groove for sliding the fourth housing. A second housing is slidably arranged above the first housing, and a second sliding groove for sliding the third housing is arranged on the left side wall of the second housing. A first-direction displacement measuring component is arranged on the first housing, and a second-direction displacement measuring component is arranged on the second housing. During the loading test, the loading fixture is placed in a closed hydraulic oil pressure environment, and the two pressure mechanisms are used to apply pressure to the second housing and the second housing respectively, and the two pressure directions are opposite.

[0007] By adopting the above technical scheme, when a loading test is required, the two pressure mechanisms apply force to the second top block and the second shell to complete the pressurization in the left and right directions and the up and down directions, and when the second top block is pressed and moved, the lower end of the second top block is pressed against the first top block and pushes the third top block to move synchronously in the left and right directions, and when the second shell is pressed and moved, the third top block pushes the fourth top block to move synchronously in the up and down directions, and at the same time, the fourth top block is pressed against the right end of the first top block, ensuring that the four upper, lower, left and right surfaces of the rectangular rock can be fully fitted with the third top block, the first top block, the second top block and the fourth top block respectively, and the hydraulic oil can complete the pressurization of the rectangular rock in the front and back directions; when the rectangular rock is detected, the first direction displacement measurement component detects the deformation of the rectangular rock in the left and right directions, and the second direction displacement measurement component detects the deformation of the rectangular rock in the vertical direction.

[0008] By setting the positions of the first direction displacement measuring component and the second direction displacement measuring component, the risk of misalignment of the internal structures of the first direction displacement measuring component and the second direction displacement measuring component during the detection process can be reduced, which is conducive to ensuring measurement accuracy.

[0009] By setting the first top block, the second top block, the third top block, the fourth top block and the hydraulic oil, it is convenient to test the rectangular rock, and the four upper and lower surfaces of the rectangular rock can always be completely fitted with the third top block, the first top block, the second top block and the fourth top block, and the front and back surfaces can be immersed in the hydraulic oil, which overcomes the problem that the rectangular rock cannot fit with the fixture due to the gap between adjacent fixtures, which is conducive to ensuring the test accuracy.

[0010] Optionally, a first wedge-shaped guide block is fixedly connected to the upper portion of the right side wall of the second top block, a first wedge-shaped guide groove that can cooperate with the first wedge-shaped guide block is formed on the left end side wall of the third top block, a second wedge-shaped guide block is fixedly connected to the lower end of the third top block, and a second wedge-shaped guide groove that can cooperate with the second wedge-shaped guide block is formed on the upper end surface of the fourth top block.

[0011] By adopting the above technical scheme, the setting of the first wedge-shaped guide block and the first wedge-shaped guide groove can facilitate the second top block to drive the third top block to move, and at the same time can guide the movement of the third top block; the setting of the second wedge-shaped guide block and the second wedge-shaped guide groove can facilitate the third top block to drive the fourth top block to move.

[0012] Optionally, a first guide rod is fixedly connected to the third top block, and a first guide groove for sliding of the first guide rod is provided in the second shell.

[0013] By adopting the above technical solution, the provision of the first guide rod and the first guide groove can facilitate the third top block to be slidably connected to the second shell body and can guide the movement of the third top block.

[0014] Optionally, a second guide rod is fixedly connected to the fourth top block, and a second guide groove for sliding of the second guide rod is provided in the first shell.

[0015] By adopting the above technical solution, the provision of the second guide rod and the second guide groove can guide the movement of the fourth top block.

[0016] Optionally, the first direction displacement measuring assembly includes a first direction displacement sensor mounted on the second top block, and a first top rod matched with the first direction displacement sensor is mounted on the first housing via a mounting seat.

[0017] Optionally, the second direction displacement measuring assembly includes a second direction displacement sensor mounted on the first top block, a second top rod matched with the second direction displacement sensor is mounted on the second shell via a mounting seat, and the first top rod and the second top rod are perpendicular to each other and staggered.

[0018] Optionally, a third directional displacement measurement component includes a U-shaped mounting frame and a third directional displacement sensor, wherein the third directional displacement sensor is arranged in the middle of the U-shaped mounting frame; during detection, the two ends of the U-shaped mounting frame are respectively attached to the front and rear side walls of the rectangular rock, and the U-shaped mounting frame is installed in a fixed position.

[0019] By adopting the above technical solution, when in use, the two ends of the U-shaped mounting frame are respectively attached to the front and rear side walls of the rectangular rock, and the third directional displacement sensor detects the deformation of the rectangular rock in the front and rear directions.

[0020] In the second aspect, the present application provides a true triaxial rock loading test device, which adopts the following technical solution: A true triaxial rock loading test device comprises a true triaxial rock loading fixture as described in the first aspect, wherein the loading fixture is placed in a closed hydraulic oil pressure environment, the test device comprises an outer shell filled with hydraulic oil, and the true triaxial rock loading fixture is arranged in the outer shell.

[0021] By adopting the above technical solution, the setting of hydraulic oil can apply pressure to the front and rear sides of the rectangular rock separately, reducing the risk of setting the front and rear side clamps and interfering with the first top block, the second top block, the third top block and the fourth top block.

[0022] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. Through the arrangement of the first top block, the second top block, the third top block, the fourth top block and the hydraulic oil, the three directions of up and down, left and right, and front and back of the rectangular rock can be pressurized separately, which is convenient for testing the rectangular rock. The four faces of the rectangular rock can always be completely fitted with the third top block, the first top block, the second top block and the fourth top block, and the front and back faces can be immersed in the hydraulic oil, which overcomes the problem that the rectangular rock cannot fit with the fixture due to the gap between adjacent fixtures, which is conducive to ensuring the test accuracy.

[0023] 2. By setting the positions of the first direction displacement measuring component and the second direction displacement measuring component, the risk of misalignment of the internal structures of the first direction displacement measuring component and the second direction displacement measuring component during the detection process can be reduced, which is conducive to ensuring measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the first guide rod in the embodiment of the present application; Figure 3 This is a schematic structural diagram of the first wedge-shaped guide groove and the first wedge-shaped guide block in an embodiment of the present application; Figure 4 Schematic diagram of the structure of the first sliding groove and the second sliding groove in the embodiment of the present application.

[0025] Explanation of the accompanying drawings: 1. first top block; 2. second top block; 21. first wedge-shaped guide block; 3. third top block; 31. first wedge-shaped guide groove; 32. second wedge-shaped guide block; 33. first guide rod; 4. fourth top block; 41. second wedge-shaped guide groove; 42. second guide rod; 5. first shell; 51. first sliding groove; 52. second guide groove; 6. second shell; 61. second sliding groove; 62. first guide groove; 7. first direction displacement measuring assembly; 71. first direction displacement sensor; 711. first displacement sensor body; 712. first disc spring base; 72. first top rod; 8. second direction displacement measuring assembly; 81. second direction displacement sensor; 811. second displacement sensor body; 812. second disc spring base; 82. second top rod; 9. third direction displacement measuring assembly; 91. U-shaped mounting bracket; 92. third direction displacement sensor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 4 , the technical scheme of the embodiment of the present application is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0027] In a first aspect, an embodiment of the present application discloses a true triaxial rock loading fixture.

[0028] Reference Figure 1 , Figure 2 and Figure 3 A true triaxial rock loading fixture comprises a pressure mechanism, a first top block 1, a second top block 2, a third top block 3 and a fourth top block 4. The first top block 1 is horizontally arranged and arranged at the bottom, the first top block 1 is fixedly installed, the second top block 2 is vertically arranged on the left, and the bottom of the second top block 2 is slidably connected to the first top block 1, the third top block 3 is horizontally arranged and arranged at the top, the second top block 2 is located above the right side wall and is fixedly connected with a first wedge-shaped guide block 21, the first wedge-shaped guide block 21 is vertically arranged, and the left side wall of the third top block 3 is provided with a first wedge-shaped guide groove 31 that can cooperate with the first wedge-shaped guide block 21.

[0029] Among them, refer to Figure 1 , Figure 2 and Figure 3The fourth top block 4 is vertically arranged and arranged on the right side, the right end of the lower side wall of the third top block 3 is fixedly connected with the second wedge-shaped guide block 32, and the top wall of the fourth top block 4 is provided with a second wedge-shaped guide groove 41 that can cooperate with the second wedge guide block 32, the left end of the fourth top block 4 is slidably connected with the right end of the first top block 1, and the area between the first top block 1, the second top block 2, the third top block 3 and the fourth top block 4 is used to place rectangular rocks; there are two pressure mechanisms, one pressure mechanism is used to apply left and right pressure to the second top block 2, and the other pressure mechanism can provide vertical pressure to the third top block 3, and the pressure directions of the two pressure mechanisms are opposite, the pressure mechanism is a prior art, which can be a hydraulic cylinder, etc., which will not be described in detail, the first top block 1, the second top block 2, the third top block 3 and the fourth top block 4 are placed in a closed hydraulic oil pressure environment, and liquid pressurization is a prior art and will not be described in detail here.

[0030] When a loading test is required, the two pressure mechanisms apply force to the second top block 2 and the third top block 3 to complete the pressurization in the left and right directions and the up and down directions, and when the second top block 2 is pressed and moved, the lower end of the second top block 2 is pressed against the first top block 1 and pushes the third top block 3 to move synchronously in the left and right directions, and when the third top block 3 is pressed and moved, the third top block 3 pushes the fourth top block 4 to move synchronously in the vertical direction, and at the same time, the fourth top block 4 is pressed against the right end of the first top block 1, ensuring that the four upper, lower, left and right surfaces of the rectangular rock can be fully fitted with the third top block 3, the first top block 1, the second top block 2 and the fourth top block 4 respectively, and the hydraulic oil can complete the pressurization of the rectangular rock in the front and back directions.

[0031] By setting the first top block 1, the second top block 2, the third top block 3, the fourth top block 4 and the hydraulic oil, the three directions of up and down, left and right, and front and back of the rectangular rock can be pressurized separately, which is convenient for testing the rectangular rock, and the four faces of the rectangular rock can always be completely fitted with the third top block 3, the first top block 1, the second top block 2 and the fourth top block 4, and the front and back faces can be immersed in the hydraulic oil, which overcomes the problem that the rectangular rock cannot be fully fitted with the fixture, which is beneficial to ensuring the test accuracy.

[0032] Reference Figure 1 and Figure 4 A true triaxial rock loading fixture further includes a first shell 5 and a second shell 6. The first shell 5 is fixedly mounted on the right end of the first top block 1, and a first sliding groove 51 for sliding the fourth top block 4 is provided on the left side wall of the first shell 5; the second shell 6 is vertically slidably arranged above the first shell 5, and a pressure mechanism acting on the third top block 3 and providing vertical pressure thereto can act on the second shell 6 synchronously, and a second sliding groove 61 for sliding the third top block 3 is provided on the left side wall of the second shell 6.

[0033] Reference Figure 1A true triaxial rock loading fixture also includes a displacement measuring mechanism. The displacement measuring mechanism is used to measure the deformation of the rectangular rock specimen after being compressed in three directions. The displacement measuring mechanism includes a first direction displacement measuring component 7, a second direction displacement measuring component 8 and a third direction displacement measuring component 9. The first direction displacement measuring component 7 and the second direction displacement measuring component 8 are used to measure the deformation of the rectangular rock in the left and right directions and the vertical direction respectively, and the third direction displacement measuring component 9 is used to measure the deformation of the rectangular rock in the front and back directions.

[0034] Reference Figure 1 , Figure 2 and Figure 3 The first direction displacement measuring assembly 7 includes a first direction displacement sensor 71 and a first push rod 72. The first direction displacement sensor 71 is mounted on the second push block 2 through a mounting seat, and the first push rod 72 is mounted on the first housing 5 through a mounting seat, wherein the first direction displacement sensor 71 includes a first displacement sensor body 711 and a first disc spring base 712 mounted on the first displacement sensor body 711 near the first push rod 72. During detection, the first push rod 72 abuts against the first disc spring base 712.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The second direction displacement measuring assembly 8 includes a second direction displacement sensor 81 and a second push rod 82. The second direction displacement sensor 81 is mounted on the first push block 1 through a mounting seat, and the second push rod 82 is mounted on the second housing 6 through a mounting seat. The first push rod 72 and the second push rod 82 are perpendicular to each other and staggered. The second direction displacement sensor 81 includes a second displacement sensor body 811 and a second disc spring base 812 mounted on the second displacement sensor body 811 near the second push rod 82. During detection, the second push rod 82 abuts against the second disc spring base 812. The first direction displacement sensor 71 and the second direction displacement sensor 81 are prior arts and will not be described in detail.

[0036] When the rectangular rock needs to be inspected, the first push rod 72 and the first direction displacement sensor 71 cooperate to measure the deformation of the rectangular rock in the left and right directions, and the second push rod 82 and the second direction displacement sensor 81 cooperate to measure the deformation of the rectangular rock in the vertical direction.

[0037] By setting the positions of the first push rod 72 and the second push rod 82, the central axis positions of the first push rod 72 and the second push rod 82 can be kept unchanged, so that the central axis position of the first push rod 72 relative to the first direction displacement sensor 71 can be kept unchanged, and the central axis position of the second push rod 82 relative to the second direction displacement sensor 81 can be kept unchanged, thereby reducing the risk of test errors caused by misalignment of the first push rod 72 and the first direction displacement sensor 71 or misalignment of the second push rod 82 and the second direction displacement sensor 81.

[0038] Reference Figure 1 The third directional displacement measuring assembly 9 includes a U-shaped mounting frame 91 and a third directional displacement sensor 92. The U-shaped mounting frame 91 is installed in a fixed position and can be fixedly mounted on the first top block 1 through a connecting rod, and the third directional displacement sensor 92 is arranged in the middle of the U-shaped mounting frame 91; during detection, the two ends of the U-shaped mounting frame 91 are respectively attached and fixed to the front and rear side walls of the rectangular rock.

[0039] When in use, the two ends of the U-shaped mounting frame 91 are respectively attached to the front and rear side walls of the rectangular rock, and the third directional displacement sensor 92 measures the deformation of the rectangular rock in the front and rear directions.

[0040] Reference Figure 2 and Figure 4 A true triaxial rock loading fixture further includes a first guide rod 33, a first guide groove 62, a second guide rod 42 and a second guide groove 52. The first guide rod 33 is fixedly connected to the third top block 3, the first guide groove 62 is provided in the second housing 6 and can allow the first guide rod 33 to slide; the second guide rod 42 is fixedly connected to the fourth top block 4, the second guide groove 52 is provided in the first housing 5 and can allow the second guide rod 42 to slide.

[0041] By setting the first guide rod 33 and the first guide groove 62, the third top block 3 can be conveniently slidably connected to the second shell 6, and the movement of the third top block 3 can be guided; by setting the second guide rod 42 and the second guide groove 52, the movement of the fourth top block 4 can be guided.

[0042] The implementation principle of a true triaxial rock loading fixture in the embodiment of the present application is: When it is necessary to carry out a loading test on the rectangular rock, the rectangular rock is first placed on the first top block 1, and then the two pressure mechanisms apply pressure to the second top block 2 and the second shell 6 respectively, so that the rectangular rock is pressurized in the left and right directions and the vertical direction. When the second top block 2 is pressed and moved, the lower end of the second top block 2 is pressed against the first top block 1 and pushes the third top block 3 to move synchronously in the left and right directions. When the second shell 6 is pressed and moved, it drives the third top block 3 to move, and the third top block 3 pushes the fourth top block 4 to move synchronously in the vertical direction. At the same time, the fourth top block 4 is pressed against the right end of the first top block 1. At this time, the third top block 3, the first top block 1, the second top block 2 and the fourth top block 4 are always pressed against the four upper, lower, left and right surfaces of the rectangular rock, and at the same time, the hydraulic oil pressurizes the rectangular blocks in the front and back directions.

[0043] When pressure is applied to the rectangular rock, the first push rod 72 cooperates with the first direction displacement sensor 71 to measure the deformation of the rectangular rock in the left and right directions, the second push rod 82 cooperates with the second direction displacement sensor 81 to measure the deformation of the rectangular rock in the vertical direction, and the two ends of the U-shaped mounting frame 91 are attached to the front and rear sides of the rectangular stone, and the third direction displacement sensor 92 measures the deformation of the rectangular rock in the front and rear directions.

[0044] In the second aspect, an embodiment of the present application further discloses a true triaxial rock loading test device, wherein the loading test device comprises a true triaxial rock loading fixture in the first aspect: the loading fixture is placed in a closed hydraulic oil pressure environment, the test device comprises an outer shell, the hydraulic oil is filled in the outer shell, and the true triaxial rock loading fixture is arranged in the outer shell.

[0045] The hydraulic oil can be used to apply pressure to the front and rear sides of the rectangular rock separately, thereby reducing the risk of interference with the first top block 1, the second top block 2, the third top block 3 and the fourth top block 4 caused by setting the front and rear side clamps.

[0046] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A true triaxial rock loading fixture, comprising two pressure applying mechanisms, a rectangular area surrounded by a first top block (1), a second top block (2), a third top block (3) and a fourth top block (4), and the rectangular area is used to place a rectangular rock; wherein: The first top block (1) is fixed in position, the second top block (2) is slidably arranged on the left side of the upper part of the first top block (1), the left end of the third top block (3) is slidably connected to the side wall of the upper end of the second top block (2), the upper end of the fourth top block (4) is slidably connected to the lower end of the right side of the third top block (3), and the lower end of the fourth top block (4) is slidably abutted against the right end of the first top block (1), characterized in that: A first housing (5) is disposed at the right end of the first top block (1), and a first sliding groove (51) for sliding the fourth top block (4) is provided on a left side wall of the first housing (5); a second housing (6) is slidably disposed above the first housing (5), and a second sliding groove (61) for sliding the third top block (3) is provided on a left side wall of the second housing (6); A first direction displacement measuring assembly (7) is provided on the first housing (5), and a second direction displacement measuring assembly (8) is provided on the second housing (6). During a loading test, the loading fixture is placed in a closed hydraulic oil pressure environment, and the two pressure mechanisms are used to apply pressure to the second top block (2) and the second housing (6), respectively, and the two pressure directions are opposite.

2. A true triaxial rock loading fixture according to claim 1, characterized in that: A first wedge-shaped guide block (21) is fixedly connected to the upper portion of the right side wall of the second top block (2); a first wedge-shaped guide groove (31) capable of cooperating with the first wedge-shaped guide block (21) is formed on the left side wall of the third top block (3); a second wedge-shaped guide block (32) is fixedly connected to the lower end of the third top block (3); and a second wedge-shaped guide groove (41) capable of cooperating with the second wedge-shaped guide block (32) is formed on the upper end surface of the fourth top block (4).

3. A true triaxial rock loading fixture according to claim 2, characterized in that: The third top block (3) is fixedly connected to a first guide rod (33), and the second housing (6) is provided with a first guide groove (62) for the first guide rod (33) to slide.

4. A true triaxial rock loading fixture according to claim 3, characterized in that: A second guide rod (42) is fixedly connected to the fourth top block (4), and a second guide groove (52) for the second guide rod (42) to slide is provided in the first housing (5).

5. A true triaxial rock loading fixture according to claim 4, characterized in that: The first direction displacement measuring assembly (7) comprises a first direction displacement sensor (71) mounted on the second top block (2), and a first top rod (72) adapted to the first direction displacement sensor (71) is mounted on the first housing (5) via a mounting seat.

6. A true triaxial rock loading fixture according to claim 5, characterized in that: The second direction displacement measuring assembly (8) comprises a second direction displacement sensor (81) mounted on the first top block (1); a second top rod (82) adapted to the second direction displacement sensor is mounted on the second housing (6) via a mounting seat; the first top rod (72) and the second top rod (82) are perpendicular to each other and are staggered.

7. A true triaxial rock loading fixture according to claim 6, characterized in that: It also includes a third directional displacement measurement component (9), which includes a U-shaped mounting frame (91) and a third directional displacement sensor (92), wherein the third directional displacement sensor (92) is arranged in the middle of the U-shaped mounting frame (91); during detection, the two ends of the U-shaped mounting frame (91) are respectively attached to the front and rear side walls of the rectangular rock, and the U-shaped mounting frame (91) is installed in a fixed position.

8. A true triaxial rock loading test device, characterized in that: It comprises a true triaxial rock loading fixture as described in any one of claims 1 to 7, wherein the loading fixture is placed in a closed hydraulic oil pressure environment, the test device comprises a shell, the hydraulic oil is filled in the shell, and the true triaxial rock loading fixture is arranged in the shell.

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