CN114563283A - Test system and test method for simulating soft rock shear rheology through multi-field coupling - Google Patents

Abstract

The invention provides a multi-field coupling test system for simulating shear rheology of soft rock. The test system is used to perform shear test on soft rock samples. The system includes: an upper shear box, a lower shear box, and a water pressure loading device With the mechanical pressure loading device, the upper shear box and the lower shear box form a box body with an integrated structure, and the soft rock sample is set in the box body; the water pressure loading device is connected with the box body, and is used to press the box body with a preset water pressure. A solution mechanical pressure loading device inputting a preset pH value in the body is connected to the box body, and is used for applying a preset value physical pressure to the box body and shearing the soft rock sample. In order to explore the rheological effects and strength parameters of soft rock formations under different osmotic pressures, different shear stresses, different blasting parameters, and different chemical solutions alone or together, and then to simulate soft rock shearing through multi-field coupling in the present invention The real formation exploration corresponding to the formation environment simulated by the rheological test system provides an effective and reliable test reference.

Description

A test system and test method for multi-field coupling simulation of soft rock shear rheology

technical field

The invention belongs to the technical field of shear test of rock and soil mass, and particularly relates to a test system and test method for simulating shear rheology of soft rock by multi-field coupling.

Background technique

Permian limestone strata with weak interlayers widely exist in southwestern my country. This stratum is rich in high-quality limestone mineral resources and is an important source of building materials for a large number of infrastructure constructions in my country. The mechanical properties of weak interlayers are important for evaluating the stability of mine slopes. critical. The research shows that under the coupling action of rainfall seepage, blasting mining and other factors, the slope deformation trend controlled by the weak interlayer presents a typical aging characteristic that gradually increases with time. Therefore, the research on the rheological properties of weak interlayers under multi-field coupling has important theoretical significance and engineering practical value for ensuring safe mining in mines. Under the initial in-situ stress field, the weak interlayer is subjected to the long-term deterioration of rain, and the shear strength is continuously weakened, and the plasticity and rheological properties of the rock mass will change significantly; repeated blasting in mining will cause the accumulation of damage to the weak interlayer. However, the mechanical properties are degraded; at the same time, the corrosion and damage of the weak interlayer by various hydrochemical environments such as acid rain, surface water and groundwater polluted by surrounding environmental factors have become more and more frequent, and the cumulative effect of slow corrosion has changed from the surface structure of the object. Into the object, the mineral composition, microstructure and mechanical properties of the rock mass can be changed, resulting in adverse engineering effects; , the rheological effect of the weak interlayer changes significantly, the strength parameters continue to decrease, and the slope continues to produce creep deformation along the weak interlayer. When the cumulative damage and deformation reach a certain level, the slope will produce overall sliding deformation failure along the weak interlayer. In order to study the rheological effect of weak interlayers in practical engineering, it is the simplest and most effective method to carry out indoor shear rheological experiments. At present, the method of conducting conventional shear rheological tests of rocks is very mature, but there are few reports on shear rheological tests under HMC-blasting vibration coupling, let alone different osmotic pressures, different shear stresses, different blasting parameters, Test device and test method for the shear-rheological effect of different chemical solutions alone or in combination. .

That is, when the soft rock formation is subjected to multi-field coupling, that is, under the repeated and interaction of the coupling of water-mechanics-chemical-blasting process (HMC-blasting vibration), the rheological effect and strength parameters of the soft interlayer are There are still gaps in the existing technology, such as experimental exploration;

It can be seen that the exploration of rheological effects and strength parameters of soft rock formations under different osmotic pressures, different shear stresses, different blasting parameters, and different chemical solutions alone or together can provide effective and reliable research for actual soft rock formations. It is a technical problem that those skilled in the art need to solve urgently.

SUMMARY OF THE INVENTION

The present invention provides a multi-field coupling simulation test system for soft rock shear rheology, to at least solve the above technical problems;

In order to solve the above problems, a first aspect of the present invention provides a multi-field coupling test system for simulating shear rheology of soft rock, the test system is used to perform shear tests on soft rock samples, and the system includes: A shear box; a lower shear box, the upper shear box and the lower shear box constitute a box body with an integrated structure, and the soft rock sample is set in the box body; a mechanical pressure loading device, the mechanical pressure A loading device is connected to the box body for applying a preset physical pressure to the box body; a water pressure loading device is connected to the box body for inputting input into the box body Solutions of different pressures and different pH values.

In the first aspect, the mechanical pressure loading device includes a normal phase static load pressure device, a horizontal dynamic load pressure device and a horizontal static load pressure device; the normal phase static load pressure device is provided at the top center of the upper shear box , used to apply vertical pressure to the upper shear box; the horizontal dynamic load pressure device is arranged on one side of the box body to apply periodic vibration pressure to the box body; the horizontal static load The pressure device is arranged on the other side of the box body, and acts on the lower shear box for applying a constant horizontal thrust to the lower shear box.

In the first aspect, the system further includes: an intermediate pressure device, the intermediate pressure device is arranged between the normal phase pressure sensor and the box body, and communicates with the box body; the water pressure loading device It also includes: a first water tank, with pure water in the first water tank; a second water tank, with a conditioning solution in the second water tank; a third water tank, with a pH tester in the third water tank; wherein, Both the first water tank and the second water tank are communicated with the third water tank, and are used to input a preset amount of the pure water or a preset amount of the conditioning solution to the third water tank to form a A mixed solution with a preset pH value; a rubber hose, the rubber hose is connected to the third water tank and the intermediate pressure device, so that the mixed solution is input into the box through the intermediate pressure device.

In the first aspect, the water pressure loading device includes: a water pump, the water pump is arranged on the rubber hose; a water pump controller, the water pump controller is connected to the water pump, and is used for controlling the output frequency of the water pump ; Water pressure sensor, the water pressure sensor is arranged on the rubber hose, used to detect the pressure of the mixed solution flowing through the rubber hose, and transmit the signal of the pressure to the water pump controller.

In the first aspect, the system further includes: an AD converter, the AD converter is connected to the water pressure sensor and the water pump controller, and the AD converter is configured to receive a water pressure signal detected by the water pressure sensor , and convert the water pressure signal into an electrical signal and send it to the water pump controller.

In the first aspect, the system further includes: an air compressor, the outlet of the air compressor is also connected to the rubber hose for inputting air into the box through the rubber hose, and the The sample is dried.

In a first aspect, the system further includes: a bracket, the bracket includes a first support surface and a second support surface, the second support surface is located above the first support surface; a carrying box, the carrying The box is arranged on the first support surface, and the carrying box is used to carry the box body; the normal static load pressure device is arranged on the second support surface, and the normal static load pressure device The output end of the contact with the intermediate pressure device through the second support surface.

In the first aspect, a slide rail is provided on the first support surface, and the length of the slide rail exceeds the coverage range between the first support surface and the second support surface, and the carrier box is provided with a slide rail. A pulley is slidable along the slide rail.

In the first aspect, the system further includes: a first displacement sensor, the first displacement sensor is arranged on the normal static load pressure device, and is used for detecting the normal displacement of the box body; a second displacement A sensor, the second displacement sensor is arranged on the lower box body, and is used for detecting the horizontal displacement of the box body.

In a second aspect, the present invention provides a method for simulating a soft rock shear rheology test. The method is applied to the multi-field coupling simulation soft rock shear rheology test system described in any one of the above, and the method The method includes: preparing a soft rock sample; the preparing a soft rock sample includes: configuring materials similar to the actual physical parameters of the soft rock to form the soft rock sample according to the actual physical parameters of the soft rock; The soft rock sample is placed in a shearing device; a preset mechanical shock pressure is applied to the shearing device and a preset water pressure is applied to the shearing device; the preset mechanical shock pressure is applied to the shearing device; The water pressure includes: inputting a mixed solution with a preset pH value into the shearing device according to a preset pressure value; applying a shearing force to the shearing device; recording the normal displacement and horizontal displacement of the shearing device.

Beneficial effects: The present invention proposes a multi-field coupling test system for simulating shear rheology of soft rock. The soft rock sample is set in the box body with an integrated structure formed by the upper shear box and the lower shear box. The mechanical pressure loading device is used to apply a preset physical pressure to the box to simulate the stress environment of different degrees of the formation, and a solution with a preset pH value is input into the box through the hydraulic pressure loading device with a preset water pressure to Model the infiltration and hydraulic environment within the formation. Shear tests are carried out on soft rock samples under the above stress, permeability and water pressure environments to explore the rheology of soft rock formations under different osmotic pressures, different shear stresses, different blasting parameters, and different chemical solutions alone or in combination. effect and strength parameters, thereby providing an effective and reliable test reference for the real formation exploration corresponding to the formation environment simulated by the multi-field coupling simulation test system for soft rock shear rheology in the present invention. That is to say, the research on the rheological properties of weak interlayers under multi-field coupling provides an experimental reference for the theoretical significance and engineering practical value of ensuring safe mining in mines.

Description of drawings

In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of the overall structure of a test system for multi-field coupling simulation of soft rock shear rheology in Embodiment 1 of the present invention;

2 is a side view 1 of a test system for multi-field coupling simulation of soft rock shear rheology in Embodiment 1 of the present invention;

3 is a second side view of the test system for multi-field coupling simulation of soft rock shear rheology in the first embodiment of the present invention;

FIG. 4 is a flowchart of a method for simulating a soft rock shear rheological test in Embodiment 2 of the present invention.

Description of reference numbers:

1. Normal static load pressure device;

2. Bracket;

3. Support column;

4. Horizontal dynamic load pressure device;

5. The first displacement sensor;

6. Pressure device;

7. Pressure plate;

8. Screws;

9. The second displacement sensor;

10. Upper cut box;

11. Lower shear box;

12. Ball;

13. Horizontal static load pressure device;

14. Carrying box;

15. Pulley;

16. Slide rail;

17. Lock;

18. Rubber hose;

19. Air compressor;

20. Water pressure sensor;

21. AD converter;

22. Water pump controller;

23. Voltage inverter;

24. Water pump;

25. Water tank;

26. PH tester;

27. Water valve;

28 support frame.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention fall within the protection scope of the present invention.

Meanwhile, in the embodiments of this specification, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a co-existing centered component. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present specification are only for the purpose of illustration and are not intended to limit the present invention.

Example 1:

As shown in Figures 1-3, the first embodiment provides a multi-field coupled test system for simulating shear rheology of soft rock. The test system is used to perform shear tests on soft rock samples. The system includes:

Upper shear box 10, lower shear box 11, mechanical pressure loading device and water pressure loading device;

The upper shear box 10 and the lower shear box 11 constitute a box body with an integrated structure, and the soft rock sample is set in the box body;

The water pressure loading device is connected with the box body, and is used for inputting the solution of the preset pH value into the box body with the water pressure of the preset value;

The mechanical pressure loading device is connected with the box body, and is used for applying a preset physical pressure to the box body and shearing the soft rock sample.

In the above technical solution, the soft rock sample is set in the box body with the integrated structure formed by the upper shear box 10 and the lower shear box 11, and a preset physical pressure is applied to the box body by the mechanical pressure loading device. , to simulate the stress environment of different degrees of the formation, and input the solution with the preset pH value into the box through the water pressure loading device with the preset water pressure to simulate the infiltration and water pressure environment in the formation. Shear tests are carried out on soft rock samples under the above stress, permeability and water pressure environments to explore the rheology of soft rock formations under different osmotic pressures, different shear stresses, different blasting parameters, and different chemical solutions alone or in combination. effect and strength parameters, thereby providing an effective and reliable test reference for the real formation exploration corresponding to the formation environment simulated by the multi-field coupling simulation test system for soft rock shear rheology in the present invention. That is to say, the research on the rheological properties of weak interlayers under multi-field coupling provides an experimental reference for the theoretical significance and engineering practical value of ensuring safe mining in mines.

Specifically, for the mechanical pressure loading device in the above embodiment 1, this embodiment 1 proposes an implementation, which includes: a normal phase static load pressure device, a horizontal dynamic load pressure device 4 and a horizontal static load pressure device Specifically, the normal phase static load pressure device is arranged at the top center of the upper shear box 10 for applying vertical pressure to the upper shear box 10; the horizontal dynamic load pressure device 4 is arranged on one side of the box body, with In order to apply periodic vibration pressure to the box body to simulate the vibration stress when the bottom layer is blasted, the horizontal static load pressure device 13 is arranged on the other side of the box body, and acts on the lower shear box 11 for downward shearing. The cutting box 11 applies a constant horizontal thrust for shearing of soft rock samples.

Specifically, for the system in the first embodiment of the present invention, it also includes an intermediate pressure device 6, the intermediate pressure device 6 is arranged between the normal phase pressure sensor and the box body, and is arranged on the box body through a pressure plate 7, And the intermediate pressure device 6 is connected to the box body; based on this, the first embodiment also proposes an implementation, the implementation includes: a first water tank, the first water tank is filled with pure water; a second water tank, the second water tank is provided with There is a conditioning solution; the third water tank is provided with a pH tester 26; wherein, the first water tank and the second water tank are both communicated with the third water tank, and are used to input a preset amount of pure water and A preset amount of adjustment solution to form a mixed solution with a preset pH value; a rubber hose 18, the rubber hose 18 is connected to the third water tank and the intermediate pressure device 6, so as to input the mixed solution into the box through the intermediate pressure device 6, to simulate complex groundwater environments. At the same time, the first water tank, the second water tank and the third water tank are supported by a support frame 28, and the installation positions of the first water tank and the second water tank are higher than that of the third water tank, and the water outlets of the first water tank and the second water tank are provided with The water valve 27, when the water valve 27 is opened, the solution in the first water tank and the second water tank flows into the third water tank by gravity.

At the same time, in order to make the rubber hose 18 in the first embodiment output a preset water pressure value, the first embodiment also proposes an implementation, which proposes another implementation of the water pressure loading device. The method includes: a water pump 24, a water pump controller 22 and a water pressure sensor, the water pump 24 is arranged on the rubber hose 18; the water pump controller 22 is connected with the water pump 24 to control the output frequency of the water pump 24; the water pressure sensor is arranged on the rubber hose The pipe 18 is used to detect the pressure of the mixed solution flowing through the rubber hose 18 and transmit the pressure signal to the water pump controller 22 . Specifically, the water pump controller 22 is also provided with a codec, which can compile the corresponding signal according to the preset pressure value edited by the staff, so as to transmit the signal of the preset pressure value to the voltage inverter in the water pump controller 22 23. The voltage inverter 23 performs voltage-frequency conversion according to the received signal. For example, if the water pressure is lower than the preset value, the water pump controller 22 will control the voltage inverter 23 in the water pump 24 to make the input voltage of the water pump 24 change. Therefore, the power of the water pump 24 increases, and the output water pressure also increases: if the water pressure is greater than the preset value, the water pump controller 22 will control the voltage inverter 23 in the water pump 24 to reduce the input voltage of the water pump 24. , so that the power of the water pump 24 is reduced, and the output water pressure is also reduced, so as to precisely control the osmotic pressure.

Further, for the system in the embodiment of the present invention, this embodiment 1 also proposes an implementation, the implementation includes: an AD converter 21, the AD converter 21 is connected to the water pressure sensor and the water pump controller 22, The AD converter 21 is used to receive the water pressure signal detected by the water pressure sensor, convert the water pressure signal into an electrical signal and send it to the water pump controller 22 . This makes the control of water pressure more precise and reduces the experimental error.

For the system of the first embodiment of the present invention, the first embodiment also proposes an implementation, which further includes: an air compressor 19, and the outlet of the air compressor 19 is also connected to the rubber hose 18 for passing through the air compressor 19. The rubber hose 18 feeds air into the box to dry the sample.

For the system of the first embodiment of the present invention, the first embodiment also proposes an implementation, which further includes: a bracket 2 and a carrying box 14, the bracket 2 includes a first support surface and a second support surface, the second support The support surface is located above the first support surface; the carrier box 14 is arranged on the first support surface, and the carrier box 14 is used to carry the box 14 body; the normal static load pressure device 1 is arranged on the second support surface, and the normal static load The output of the pressure carrier 1 is in contact with the intermediate pressure 6 through the second bearing surface.

Further, for the bracket 2 in the above-mentioned first embodiment, the first embodiment also proposes an implementation, the implementation includes: the first support surface is provided with a slide rail 15, and the length of the slide rail 15 exceeds The coverage between the first support surface and the second support surface, the carrying box 14 is provided with a pulley 16, the pulley 16 can slide along the slide rail 15, so that the center of the box body can be more accurately aligned with the normal static load Pressure vessel 1 and horizontal static carrier to reduce experimental error.

For the system of the first embodiment of the present invention, the first embodiment also proposes an implementation, which further includes: a first displacement sensor 5 and a second displacement sensor 9, and the first displacement sensor 5 is arranged at the normal static load The pressure device 1 is used to detect the normal displacement of the box body; the second displacement sensor 9 is arranged on the lower box body and used to detect the horizontal displacement of the box body.

Specifically, for the connection method between the box body and the carrying box 14 in the above-mentioned first embodiment, the first embodiment also proposes an implementation, which includes: the box body and the carrying box 14 are provided with locks 17 . , the shear box can be moved together when the carrying box 14 moves, and the lock 17 can be released after reaching the proper position, and the pressure can be started.

Further, with regard to the connection method between the box body and the carrying box 14 in the above-mentioned first embodiment, this embodiment one further proposes another implementation, the implementation includes: at the connection position of the carrying box 14 and the box body through a screw The two are connected in a detachable manner, that is, through the mutual cooperation of the screw holes and the screws 8.

Still further, for the connection method between the box body and the carrier box 14 in the above-mentioned first embodiment, this embodiment 1 proposes an implementation, which includes: arranging between the carrier box 14 and the lower box body. There are several balls 12 .

And, in order to keep the bearing box 14 and the box body from deviating during the moving process, the first embodiment also proposes an implementation, the implementation includes: the bearing box 14 is provided with a lock 17, and the lower box A lock ring is provided, and when the carrier box 14 and the box body need to be moved, the lock buckle 17 is buckled on the lock ring to temporarily fix the two.

Embodiment 2:

As shown in Figure 4, the second embodiment provides a method for simulating a soft rock shear rheology test. The method is applied to any one of the above-mentioned multi-field coupling simulation soft rock shear rheology test systems, and the method includes: The soft rock sample is prepared first; the preparation of the soft rock sample includes: according to the actual physical parameters of the soft rock, configure materials similar to the actual physical parameters of the soft rock to form the soft rock sample; Then apply preset mechanical shock pressure to the shearing device and apply preset water pressure to the shearing device; applying the preset water pressure to the shearing device includes: inputting the preset pressure value into the shearing device Mixed solution with preset pH value; apply shear force to the shearing device; finally record the normal displacement and horizontal displacement of the shearing device.

Further, after the mixed solution with the preset pH value is input into the shearing device according to the preset pressure value in the second embodiment, the second embodiment also proposes an implementation, which further includes: using an air drying device. , inject air into the soft rock sample in the box to dry the soft rock sample.

Since the second embodiment and the first embodiment are an embodiment under the same inventive concept, and their partial structures are completely the same, therefore, the substantially same structure in the second embodiment as that of the first embodiment will not be described in detail. Example one will do.

Finally, it should be noted that the above-mentioned embodiments are only specific implementations of the present invention, and are used to illustrate the technical solutions of the present invention, but not to limit them. The protection scope of the present invention is not limited thereto, although referring to the foregoing implementation The present invention has been described in detail by the examples, and those of ordinary skill in the art should understand that: any person skilled in the art can still modify or modify the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present invention. Changes can be easily conceived, or equivalent replacements can be made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (10)

1. A test system for simulating soft rock shear rheology through multi-field coupling is used for carrying out shear test on a soft rock sample, and is characterized by comprising:

an upper shearing box;

the upper shearing box and the lower shearing box form a box body of an integrated structure, and the soft rock sample is arranged in the box body;

the water pressure loading device is connected with the box body and is used for inputting a solution with a preset PH value into the box body under the water pressure of a preset value

And the mechanical pressure loading device is connected with the box body and is used for applying physical pressure of a preset value to the box body and shearing the soft rock sample.

2. The multi-field coupling soft rock shear rheology simulation test system of claim 1, wherein the mechanical pressure loading device comprises a normal static load pressure gauge, a horizontal dynamic load pressure gauge and a horizontal static load pressure gauge;

the normal-phase static pressure device is arranged at the center of the top of the upper shearing box and is used for applying vertical pressure to the upper shearing box;

the horizontal dynamic load pressure device is arranged on one side of the box body and is used for applying periodic vibration pressure to the box body;

the horizontal static load pressure gauge is arranged on the other side of the box body, acts on the lower shearing box and is used for applying constant horizontal thrust to the lower shearing box.

3. The system for simulating soft rock shear rheology using multi-field coupling as claimed in claim 1 further comprising:

the intermediate pressure device is arranged between the normal phase pressure sensor and the box body and communicated with the box body;

the water pressure loading device further comprises:

the first water tank is filled with purified water;

a second water tank, wherein a regulating solution is arranged in the second water tank;

a third water tank, wherein a PH tester is arranged in the third water tank;

the first water tank and the second water tank are communicated with the third water tank and are used for inputting a preset amount of purified water and a preset amount of regulating solution into the third water tank so as to form a mixed solution with a preset PH value;

the rubber hose is communicated with the third water tank and the intermediate pressure device so as to input the mixed solution into the box body through the intermediate pressure device.

4. The system for simulating shear rheology of soft rock of claim 3 wherein said water pressure loading means comprises:

the water pump is arranged on the rubber hose;

the water pump controller is connected with the water pump and used for controlling the output frequency of the water pump;

and the water pressure sensor is arranged on the rubber hose and used for detecting the pressure of the mixed solution flowing through the rubber hose and transmitting a signal of the pressure to the water pump controller.

5. The system for simulating soft rock shear rheology using multi-field coupling as claimed in claim 4 further comprising:

the AD converter, the AD converter with water pressure sensor and the water pump controller is connected, the AD converter is used for receiving the water pressure signal that water pressure sensor detected, and will water pressure signal conversion is signal of telecommunication send to the water pump controller.

6. The system for simulating soft rock shear rheology using multi-field coupling of claim 3 further comprising:

and the outlet of the air compressor is also connected with the rubber hose and used for inputting air into the box body through the rubber hose so as to dry the soft rock sample.

7. The system for simulating soft rock shear rheology using multi-field coupling of claim 3 further comprising:

a support including a first support surface and a second support surface, the second support surface being located above the first support surface;

the bearing box is arranged on the first supporting surface and is used for bearing the box body;

the normal static pressure device is arranged on the second supporting surface, and the output end of the normal static pressure device penetrates through the second supporting surface to be in contact with the intermediate pressure device.

8. The multi-field coupling soft rock shear rheology simulation test system of claim 7, further comprising:

the bearing box is characterized in that a sliding rail is arranged on the first supporting surface, the length of the sliding rail exceeds the coverage range between the first supporting surface and the second supporting surface, and a pulley is arranged on the bearing box and can slide along the sliding rail.

9. The system for simulating soft rock shear rheology using multi-field coupling as claimed in claim 1 further comprising:

the first displacement sensor is arranged on the normal static load pressure gauge and used for detecting the normal displacement of the box body;

and the second displacement sensor is arranged on the lower box body and is used for detecting the horizontal displacement of the box body.

10. A method for simulating shear rheology test of soft rock by multi-field coupling, which is applied to the test system for simulating shear rheology of soft rock by multi-field coupling as claimed in any one of claims 1 to 9, and which comprises:

preparing a soft rock sample; the preparation of the soft rock sample comprises the following steps: configuring materials similar to the actual physical parameters of the soft rock according to the actual physical parameters of the soft rock to form the soft rock sample;

placing the soft rock sample in a shearing device;

applying a preset mechanical vibration pressure to the shearing equipment and applying a preset water pressure to the shearing equipment; the applying a preset water pressure to the shearing device comprises: inputting a mixed solution with a preset PH value into the shearing equipment according to a preset pressure value;

applying a shear force to the shearing device;

recording the normal displacement and the horizontal displacement of the shearing device.

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