Rock triaxial creep test device and rock test piece used for same

Abstract

The utility model discloses a rock triaxial creep test device and a rock test piece used for the rock triaxial creep test device, the rock triaxial creep test device comprises an axial pressure mechanism, a liquid inlet mechanism, a collecting mechanism and a monitoring system, an axial pressure head of the axial pressure mechanism is located at the top of the rock test piece; the axial pressure head is used for dividing the accommodating cavity of the shell into a first accommodating cavity and a second accommodating cavity, and the rock test piece is positioned in the second accommodating cavity; the liquid inlet mechanism is used for injecting a test solution into the second accommodating cavity; the collecting mechanism is used for recovering the test solution in the second accommodating cavity; the monitoring system comprises an axial displacement sensor, an annular displacement sensor and a pH value detector. According to the rock triaxial creep test device disclosed by the utility model, the rheological process of a rock test piece under the erosion of a test solution can be more reasonably, objectively and accurately reflected, and the rock triaxial creep test device is simple in structure, low in manufacturing cost, simple to operate and easy to control.

Description

Technical Field

[0001] This utility model relates to the field of rock testing equipment technology, and in particular to a rock triaxial creep testing device and a rock test piece used in the rock triaxial creep testing device. Background Technology

[0002] In related technologies, the study of the time-dependent characteristics of rocks under chemical solution environments and triaxial stress is crucial for accurately describing the characteristics of each stage of rock creep behavior under the combined effects of chemical solution environments and triaxial stress. Considering that rock creep, particularly pH value, reflects the changing mechanical properties of rocks over time, it is closely related to the long-term stability and safety of rock engineering. Therefore, a triaxial creep testing device for rocks under chemical solution erosion is needed to investigate the impact of chemical solution erosion on rock creep characteristics. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a triaxial creep testing device for rocks. This device can not only more reasonably, objectively, and accurately reflect the rheological process of rock specimens under the erosion of the test solution, but also has a simple structure, low cost, simple operation, and easy control.

[0004] This utility model also proposes a rock test specimen having the above-mentioned triaxial creep test device for rocks.

[0005] A triaxial creep testing device for rocks according to a first aspect of the present invention includes: a shell having an upwardly opening receiving cavity, wherein a rock test specimen is located on the bottom wall of the receiving cavity; an axial compression mechanism including an axial indenter located on top of the rock test specimen, the axial indenter being used to divide the receiving cavity into a first receiving cavity and a second receiving cavity, wherein the rock test specimen is located in the second receiving cavity; a liquid inlet mechanism for injecting a test solution into the second receiving cavity; a collection mechanism for recovering the test solution in the second receiving cavity; and a monitoring system including an axial displacement sensor, a circumferential displacement sensor, and a pH meter, wherein the axial displacement sensor is fixed in the first receiving cavity for acquiring the axial displacement of the axial indenter, the circumferential displacement sensor surrounds the rock test specimen for acquiring the circumferential displacement of the rock test specimen, and the pH meter is located in the second receiving cavity for acquiring the pH value of the test solution.

[0006] According to the rock triaxial creep test device of the present invention, the rock triaxial creep test device can not only more reasonably, objectively and accurately reflect the rheological process of rock test specimens under the erosion of test solution, but also has a simple structure, low cost, simple operation and easy control.

[0007] According to some embodiments of the present invention, the rock triaxial creep testing device further includes: a reaction frame, the housing being located inside the reaction frame, the axial compression mechanism further including a hydraulic component and a telescopic rod, the hydraulic component being fixed to the reaction frame, the telescopic rod being movably connected between the hydraulic component and the axial pressure head, and the hydraulic component being adapted to adjust the force between the axial pressure head and the rock test specimen.

[0008] According to some embodiments of the present invention, the rock triaxial creep testing device further includes: a crossbar, which is detachably fixed to the opening of the receiving cavity; the axial displacement sensor includes a telescopic component, which is telescopic and its two ends are respectively connected to the crossbar and the axial pressure head.

[0009] According to some embodiments of the present invention, the liquid inlet mechanism includes: a storage tank and a liquid inlet pipe, the liquid inlet pipe connecting the storage tank and the second receiving cavity, the liquid inlet pipe being provided with a flow meter and a liquid inlet valve, the flow meter being located upstream of the liquid inlet valve.

[0010] According to some embodiments of the present invention, the liquid inlet mechanism is electrically connected to a computer system, and the computer system is used to control the liquid inlet volume of the liquid inlet mechanism.

[0011] According to some embodiments of the present invention, the collection mechanism includes a collection box and a collection pipeline, the collection pipeline being connected between the second receiving cavity and the collection box, and the collection pipeline being provided with a liquid outlet valve.

[0012] According to some embodiments of the present invention, the axial pressure head has a liquid flow channel, which is connected between the collection pipeline and the second receiving cavity.

[0013] According to some embodiments of the present invention, the rock triaxial creep testing device further includes: a mounting base, the mounting base being located at the bottom of the second receiving cavity, the mounting base having a mounting groove for mounting the rock test specimen.

[0014] According to some embodiments of this utility model, a sealing ring is provided between the axial pressure head and the inner wall of the housing.

[0015] According to a second aspect embodiment of the present invention, a rock test specimen for a triaxial creep testing device for rocks is provided, wherein the rock test specimen is a cylinder and the two axial end faces of the rock test specimen are arranged in parallel.

[0016] The rock test specimen for the triaxial creep testing device for rocks according to the present invention can be easily placed on top of the rock test specimen, and at the same time, it is easy to arrange the circumferential displacement sensor.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a rock triaxial creep test apparatus according to some embodiments of the present invention.

[0020] Figure label:

[0021] 100. Triaxial creep testing apparatus for rocks;

[0022] 10. Reaction frame;

[0023] 20. Housing; 21. Receiving cavity; 211. First receiving cavity; 212. Second receiving cavity; 22. Crossbar; 221. Bolt; 23. Mounting base; 24. Pressure-bearing base;

[0024] 30. Axial pressure mechanism; 31. Axial pressure head; 311. Fluid flow channel; 32. Telescopic rod;

[0025] 40. Liquid inlet mechanism; 41. Storage tank; 42. Liquid inlet pipe; 421. Flow meter; 422. Liquid inlet valve;

[0026] 50. Collection mechanism; 51. Collection box; 52. Collection pipeline; 521. Discharge valve;

[0027] 60. Monitoring system; 61. Axial displacement sensor; 62. Circumferential displacement sensor; 63. pH meter;

[0028] 70. Computer system;

[0029] 80. Rock test specimen. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The following is for reference. Figure 1 Description of a rock triaxial creep testing apparatus 100 according to an embodiment of the present invention.

[0034] According to the first aspect of the present invention, the triaxial creep testing device 100 for rock is used to study the triaxial stress state and deformation characteristics of rock specimen 80 under the erosion of chemical solution.

[0035] The triaxial creep testing device 100 for rocks includes a housing 20 and an axial compression mechanism 30. The housing 20 has an upward-opening receiving cavity 21. The rock test specimen 80 is located on the bottom wall of the receiving cavity 21. The axial compression mechanism 30 includes an axial indenter 31, which is located on top of the rock test specimen 80. The axial indenter 31 is used to divide the receiving cavity 21 into a first receiving cavity 211 and a second receiving cavity 212. The rock test specimen 80 is located in the second receiving cavity 212. The axial indenter 31 not only has its own gravity, but can also be subjected to external forces to increase the force applied by the axial indenter 31 to the rock test specimen 80. The axial compression mechanism 30 can simulate the external forces that rocks experience in natural environments.

[0036] The triaxial creep testing apparatus 100 for rocks also includes a liquid inlet mechanism 40, a collection mechanism 50, and a monitoring system 60. The liquid inlet mechanism 40 is used to inject a test solution into the second receiving cavity 212. The test solution is a pre-prepared chemical solution, and the composition of the chemical solution can be configured according to the test requirements, which is not limited in this application. The collection mechanism 50 is used to recover the test solution in the second receiving cavity 212. The liquid inlet mechanism 40 and the collection mechanism 50 can be configured with different liquid inlet and collection methods according to the actual test requirements. For example, both the inlet mechanism 40 and the collection mechanism 50 can be kept open at all times, so that the test solution entering the second receiving cavity 212 is in a flowing state; alternatively, the collection mechanism 50 can be closed, and after the inlet mechanism 40 injects a certain amount of test solution into the second receiving cavity 212, the inlet mechanism 40 is closed, and after the test is completed, the collection mechanism 50 is opened to collect the test solution in the second receiving cavity 212; alternatively, the collection mechanism 50 can be closed, and after the inlet mechanism 40 injects a certain amount of test solution into the second receiving cavity 212, the inlet mechanism 40 is closed, and after a period of time, the collection mechanism 50 is opened to collect the test solution in the second receiving cavity 212, then the collection mechanism 50 is closed, and the inlet mechanism 40 is opened again to inject a certain amount of test solution into the second receiving cavity 212, and this process is repeated until the test is completed.

[0037] The monitoring system 60 includes an axial displacement sensor 61, a circumferential displacement sensor 62, and a pH meter 63. The axial displacement sensor 61 is fixed within the first receiving cavity 211 and is used to acquire the axial displacement of the axial indenter 31. The axial indenter 31 acts on the top of the rock specimen 80. Movement of the axial indenter 31 towards the rock specimen 80 indicates axial deformation of the rock specimen 80; that is, the axial displacement represents the axial displacement of the rock specimen 80 during the test. The circumferential displacement sensor 62 surrounds the circumference of the rock specimen 80 and is used to acquire the circumferential displacement of the rock specimen 80. The pH meter 63 is located within the second receiving cavity 212 and is used to acquire the pH value of the test solution. By monitoring the system 60, the axial and circumferential displacements of the rock specimen 80 and the pH changes of the test solution during the test can be acquired. This allows for the acquisition of the time-dependent characteristics of the rock specimen 80 under the test solution environment and triaxial stress conditions, accurately describing the various stages of creep behavior of the rock specimen 80 under the combined action of a chemical solution environment and triaxial stress. The rock triaxial creep test device 100 has a simple structure, low cost, simple operation and easy control; it can also more reasonably, objectively and accurately reflect the rheological process of rock test specimen 80 under the erosion of test solution.

[0038] For example, the monitoring system 60 is electrically connected to the computer system 70, and the computer system 70 acquires data from the monitoring system 60.

[0039] The triaxial creep test device 100 can realistically simulate the triaxial stress state and deformation characteristics of rock materials under the action of chemical solutions in actual engineering. It can obtain the rheological law of rocks in chemical solution environments, realize the study of the rheological law of rocks under the combined action of solution flow scouring and chemical erosion, and can monitor the pH value of the solution environment in real time. It is of great significance for the study and application of water-rock coupling characteristics in fields such as geotechnical engineering, underground engineering, water conservancy engineering, and petroleum engineering.

[0040] According to the rock triaxial creep test device 100 of the present invention, the rock triaxial creep test device 100 can not only more reasonably, objectively and accurately reflect the rheological process of the rock test piece 80 under the erosion of the test solution, but also the rock triaxial creep test device 100 has a simple structure, low cost, simple operation and easy control.

[0041] According to some embodiments of this utility model, refer to Figure 1The triaxial creep testing apparatus 100 for rocks also includes a reaction frame 10, which comprises a base plate, a top plate, and a connecting rod connecting the top plate and the base plate. A housing 20 is located within the reaction frame 10, which protects the housing 20. The axial compression mechanism 30 further includes a hydraulic component and a telescopic rod 32. The hydraulic component is fixed to the reaction frame 10; specifically, it can be fixed to the top plate of the reaction frame 10. The telescopic rod 32 is movably connected between the hydraulic component and the axial pressure head 31. The hydraulic component is adapted to adjust the force between the axial pressure head 31 and the rock test specimen 80, and is used to adjust the force between the axial pressure head 31 and the rock test specimen 80 according to different test requirements.

[0042] When installing the axial indenter 31, a hydraulic component can be used to move the axial indenter 31 to place it on top of the rock test specimen 80; after the test, a hydraulic component can be used to move the axial indenter 31 to remove it.

[0043] According to some embodiments of this utility model, refer to Figure 1 The rock triaxial creep testing device 100 also includes a crossbar 22, which is detachably fixed to the opening of the receiving cavity 21. The crossbar 22 can be fixed to the housing 20 by bolts 221. The crossbar 22 can be located on one side of the telescopic rod 32. After the crossbar 22 is removed, the axial pressure head 31 can be removed from the receiving cavity 21.

[0044] The axial displacement sensor 61 includes a telescopic component that is telescopic. Both ends of the telescopic component are connected to the crossbar 22 and the axial pressure head 31, respectively. When the axial pressure head 31 undergoes axial displacement, the axial pressure head 31 can drive the telescopic component of the axial displacement sensor 61 to move, so as to detect the axial displacement of the axial pressure head 31.

[0045] According to some embodiments of this utility model, refer to Figure 1 The liquid inlet mechanism 40 includes a storage tank 41 and a liquid inlet pipe 42. The liquid inlet pipe 42 is connected between the storage tank 41 and the second receiving cavity 212. The liquid inlet pipe 42 is equipped with a flow meter 421 and a liquid inlet valve 422. The flow meter 421 is used to obtain the flow rate of the test solution in the liquid inlet pipe 42. The liquid inlet valve 422 is used to open or close the liquid inlet pipe 42. The flow rate of the test solution entering the second receiving cavity 212 through the liquid inlet pipe 42 can also be controlled by adjusting the size of the liquid inlet valve 422.

[0046] The flow meter 421 is located upstream of the inlet valve 422. Based on the flow rate of the test solution obtained by the flow meter 421, the size of the inlet valve 422 can be adjusted accordingly.

[0047] For example, the bottom wall of the shell 20 has a first liquid inlet channel, which connects the liquid inlet pipe 42 and the second receiving cavity 212. The test solution enters the second receiving cavity 212 from the bottom of the shell 20. Regardless of the size of the rock test piece 80, the test solution can be guaranteed to erode and scour the rock test piece 80.

[0048] According to some embodiments of this utility model, refer to Figure 1 The liquid inlet mechanism 40 is electrically connected to the computer system 70. The computer system 70 is used to control the liquid inlet volume of the liquid inlet mechanism 40, and can control the opening or closing of the liquid inlet valve 422, as well as the size of the liquid inlet valve 422. In turn, it can control the liquid inlet speed and liquid inlet pressure of the liquid inlet mechanism 40, thereby realizing the flow scouring and chemical erosion of the rock test piece 80 by the test solution, and can also realize the intelligent control of the liquid inlet speed and liquid inlet pressure of the test solution.

[0049] According to some embodiments of this utility model, refer to Figure 1 The collection mechanism 50 includes a collection box 51 and a collection pipe 52. The collection pipe 52 connects the second receiving cavity 212 and the collection box 51. The collection pipe 52 is equipped with an outlet valve 521, which can open or close the collection pipe 52 and can also adjust the size of the outlet valve 521 to regulate the flow rate of the test solution flowing out of the second receiving cavity 212. This helps to control the pressure and flow rate of the test solution entering the second receiving cavity 212, thereby realizing the flow scouring and chemical erosion of the rock test piece 80 by the chemical solution.

[0050] According to some embodiments of this utility model, refer to Figure 1 The axial pressure head 31 has a liquid flow channel 311, which is connected between the collection pipe 52 and the second receiving cavity 212. The axial pressure head 31 is located at the top of the rock test piece 80, so that a second receiving cavity 212 is formed between it and the shell 20. Due to the different sizes of the rock test pieces 80, the size of the second receiving cavity 212 is different. By connecting the collection pipe 52 to the second receiving cavity 212 through the liquid flow channel 311 of the axial pressure head 31, it can be ensured that the collection pipe 52 is always connected to the second receiving cavity 212.

[0051] According to some embodiments of this utility model, refer to Figure 1 The rock triaxial creep testing device 100 also includes: a mounting base 23, which is located at the bottom of the second receiving cavity 212. The mounting base 23 has a mounting groove, in which the rock test piece 80 is located. The mounting groove of the mounting base 23 can position the rock test piece 80 and also fix the rock test piece 80.

[0052] In a specific example, the triaxial creep testing device 100 for rocks further includes: a pressure-bearing base 24, which is located at the bottom of the mounting base 23 and is used to support the weight of the rock test specimen 80. The pressure-bearing base 24 has a second liquid inlet channel, and the mounting base 23 has a third liquid inlet channel. The second liquid inlet channel, the third liquid inlet channel and the first liquid inlet channel are all connected. The second liquid inlet channel, the third liquid inlet channel and the first liquid inlet channel are connected between the liquid inlet pipe 42 and the second receiving cavity 212. The test solution enters the second receiving cavity 212 from the bottom of the shell 20. Regardless of the size of the rock test specimen 80, the test solution can be guaranteed to erode and scour the rock test specimen 80.

[0053] For example, the mounting groove of the mounting base 23 can be located on the center line of the second receiving cavity 212, thereby placing the rock test specimen 80 on the center line of the second receiving cavity 212.

[0054] According to some embodiments of this utility model, refer to Figure 1 A sealing ring is provided between the axial pressure head 31 and the inner wall of the housing 20. The sealing ring can surround the circumference of the axial pressure head 31 to seal the gap between the axial pressure head 31 and the inner wall of the housing 20, so as to prevent the test solution in the second receiving cavity 212 from leaking.

[0055] According to a second aspect embodiment of the present invention, a rock test specimen 80 for a triaxial creep testing apparatus 100 for rocks, referencing... Figure 1 The rock test specimen 80 is a cylinder with its two axial end faces set in parallel, which facilitates the placement of the axial indenter 31 on the top of the rock test specimen 80 and also facilitates the arrangement of the circumferential displacement sensor 62.

[0056] For example, rock specimen 80 has a diameter of 50 mm and an axial height of 100 mm.

[0057] The rock test piece 80 of the triaxial creep testing device 100 for rock according to the present invention can be conveniently placed on the top of the rock test piece 80, and at the same time facilitates the arrangement of the circumferential displacement sensor 62.

[0058] The triaxial creep testing apparatus 100 erodes the rock specimen 80, including the following steps:

[0059] Step 1: Prepare a rock test specimen 80 that is undamaged and without cracks, and ensure that the two axial end faces of the rock test specimen 80 are parallel.

[0060] Step 2: Ensure that the cavity 21 is clean and free of foreign objects.

[0061] Step 3: Place the mounting base 23 into the receiving cavity 21 and fix it on the pressure-bearing base 24. Then place the rock test specimen 80 into the mounting groove of the mounting base 23. The rock test specimen 80 should be in close contact with the mounting base 23, and ensure that the mounting base 23 and the rock test specimen 80 are both on the center line of the receiving cavity 21.

[0062] Step 4: Install the pH meter 63 and fix it on the mounting base 23. Install the circumferential displacement sensor 62 in the middle of the rock test piece 80.

[0063] Step 5: Install the axial pressure head 31, and then place the crossbar 22.

[0064] Step 6: Fix the axial displacement sensor 61 between the crossbar 22 and the axial pressure head 31.

[0065] Step 7: Fix the crossbar 22 to the housing 20 using bolts 221.

[0066] Step 8: Store the prepared test solution in the storage tank 41, turn on the computer system 70 to control the inlet valve 422, and adjust the outlet valve 521 of the collection mechanism 50 to control the pressure and flow rate of the test solution entering the second containment chamber 212 in real time, so as to realize the flow scouring and chemical erosion of the rock by the test solution.

[0067] Step 9: After the test is completed, the collection mechanism 50 draws back the excess test solution, removes the axial displacement sensor 61, removes the bolt 221 and disassembles the crossbar 22, the hydraulic components drive the telescopic rod 32 to lift the axial pressure head 31, removes the circumferential displacement sensor 62, and takes out the rock test piece 80 after the test.

[0068] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rock triaxial creep test device, characterized by, The device comprises: a housing having an upwardly open accommodating cavity, a rock test piece being located at the bottom wall of the accommodating cavity; a shaft pressing mechanism comprising a shaft pressing head, the shaft pressing head being located at the top of the rock test piece, the shaft pressing head being used to divide the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the rock test piece being located in the second accommodating cavity; a liquid feeding mechanism used to inject a test solution into the second accommodating cavity; a collecting mechanism used to recover the test solution in the second accommodating cavity; a monitoring system comprising a shaft displacement sensor, a ring displacement sensor and a pH detector, the shaft displacement sensor being fixed in the first accommodating cavity and used to acquire the shaft displacement of the shaft pressing head, the ring displacement sensor being arranged around the circumference of the rock test piece and used to acquire the ring displacement of the rock test piece, the pH detector being located in the second accommodating cavity and used to acquire the pH value of the test solution.

2. The rock triaxial creep test apparatus according to claim 1, characterized by Further comprising: a counterforce frame, the housing being located in the counterforce frame, the shaft pressing mechanism further comprising a hydraulic device and an extension rod, the hydraulic device being fixed to the counterforce frame, the extension rod being movably connected between the hydraulic device and the shaft pressing head, the hydraulic device being adapted to adjust the force between the shaft pressing head and the rock test piece.

3. The rock triaxial creep test apparatus according to claim 1, characterized by Further comprising: a crossbar being detachably fixed at the opening of the accommodating cavity, the shaft displacement sensor comprising an extension rod, the extension rod being extendable and having two ends connected with the crossbar and the shaft pressing head respectively.

4. The rock triaxial creep test apparatus according to claim 1, characterized by, The liquid feeding mechanism comprises a storage tank and a liquid feeding pipeline, the liquid feeding pipeline being communicated between the storage tank and the second accommodating cavity, the liquid feeding pipeline being provided with a flow meter and a liquid feeding valve, the flow meter being located upstream of the liquid feeding valve.

5. The rock triaxial creep test apparatus according to claim 4, wherein The liquid feeding mechanism is electrically connected with a computer system, the computer system being used to control the liquid feeding amount of the liquid feeding mechanism.

6. The rock triaxial creep test apparatus of claim 1, wherein, The collecting mechanism comprises a collecting tank and a collecting pipeline, the collecting pipeline being communicated between the second accommodating cavity and the collecting tank, the collecting pipeline being provided with a liquid outlet valve.

7. The rock triaxial creep test apparatus according to claim 6, characterized by The shaft pressing head has a liquid flow channel, the liquid flow channel being communicated between the collecting pipeline and the second accommodating cavity.

8. The rock triaxial creep test apparatus according to claim 1, characterized by Further comprising: a mounting base being located at the bottom of the second accommodating cavity, the mounting base having a mounting groove used to mount the rock test piece.

9. The rock triaxial creep test apparatus of claim 1, wherein, A sealing ring is arranged between the shaft pressing head and the inner wall of the housing.

10. A rock test piece for use in the rock triaxial creep test device according to any one of claims 1 to 9, characterized by, The rock test piece is a cylinder, the axial two end faces of the rock test piece being arranged in parallel.

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