Triaxial testing machine for multi-axis accurate testing of rock mechanical properties

Abstract

The utility model relates to the technical field of rock mechanical analysis, and discloses a triaxial testing machine for multi-axis accurate testing of rock mechanical properties, which comprises a rock sample, a lateral pressure applying mechanism arranged on the outer side of the rock sample and used for pressurizing and clamping two walls of the rock sample far away from each other, the upper end of the rock sample is provided with a downward pressing mechanism for longitudinally applying pressure to the upper end of the rock sample, the lower end of the rock sample is provided with a bearing assembly for measuring the pressure applied by the downward pressing mechanism to the rock sample, the bearing assembly provides a stable supporting platform, and the applied pressure weight is monitored in real time through an electronic weighing disc. The driving mechanism ensures that the lateral pressure applying mechanism and the downward pressing mechanism can accurately rotate around the rock sample, unsafe factors and errors in traditional manual operation are avoided, the lateral pressure applying mechanism accurately applies pressure through a hydraulic push rod, the pressure state is fed back in real time through a pressure sensor, and the rock sample is accurately detected. And the pressing mechanism accurately controls longitudinal pressure through a screw rod, so that uniform and stable application is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to rock mechanics analysis technical field, specifically, it relates to rock mechanics characteristic multi -axial accurate test's triaxial testing machine. BACKGROUND

[0002] Rock mechanics characteristic triaxial testing machine is a kind of experimental equipment for researching the mechanical behavior of rock under different pressure conditions, by applying triaxial pressure (axial pressure and two lateral pressures respectively) to rock sample, simulating the real stress environment of underground rock stratum, testing the mechanical properties of rock under different stress states, such as compressive strength, deformation characteristics, failure mode, etc., this test can reveal the important parameters of rock such as crack resistance, elastic modulus, internal friction angle and cohesion, help to evaluate the stability and safety of rock in mining, tunnel construction, mine blasting and other engineering, triaxial testing machine is widely used in geotechnical engineering, geological exploration and disaster prediction field, provides important data support for the design and safety of rock engineering.

[0003] The conventional rock mechanics characteristic triaxial testing machine in the prior art cannot automatically rotate around the rock sample when applying lateral pressure, therefore, the experimental personnel must manually place the rock sample to ensure its correct positioning, this process not only needs a long operation time, but also increases the complexity of operation and the frequency of manual intervention due to the need to adjust the sample position multiple times, in addition, during the manual placement process, the experimental personnel is easily affected by fatigue and careless operation, leading to inaccurate sample placement, which may affect the accuracy and repeatability of test results, more seriously, frequent manual operation also increases the safety hazard, especially in a high-pressure environment, improper operation of personnel may cause rock sample rupture or equipment failure, causing the risk of accidents, therefore, the technical personnel in this field provides rock mechanics characteristic multi -axial accurate test's triaxial testing machine to solve the problems raised in the above background. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing rock mechanics characteristic multi -axial accurate test's triaxial testing machine, solve the existing conventional rock mechanics triaxial testing machine when applying lateral pressure, cannot realize automatic rotation, lead to experimental personnel to manually place rock sample to ensure its correct positioning, this not only increases the operation time and complexity, also needs to adjust sample position frequently, increases manual intervention, manual operation is easily affected by fatigue and negligence, may lead to inaccurate sample placement, thereby affecting the accuracy and repeatability of test results, more seriously, frequent manual operation increases the safety hazard, especially in a high-pressure environment, improper operation may cause rock sample rupture or equipment failure, there is a big risk problem.

[0005] The utility model provides following technical scheme: The triaxial testing machine of rock mechanics characteristic multi -axis precision test, including rock sample, the lateral pressure mechanism who is used for to rock sample mutual far -off two wall press -in clamping is arranged to rock sample outside, the lower pressure mechanism who is used for vertically to rock sample upper end press is arranged to rock sample upper end, the load -bearing assembly who is used for measuring the pressure weight that rock sample is pressed by lower pressure mechanism is arranged to rock sample lower end, the drive mechanism who is used for driving lateral pressure mechanism and lower pressure mechanism around rock sample rotation is arranged to the load -bearing assembly upper end.

[0006] As the preferred of above technical scheme, the load -bearing assembly includes the supporting disc, a plurality of support columns are fixedly connected in annular arrangement at the upper end center edge of the supporting disc, an electronic weighing disc is fixedly installed at the upper end center of the supporting disc, a plurality of support rods are fixedly connected in annular arrangement at the upper end center edge of the electronic weighing disc, a plurality of support steel frames are fixedly connected between the plurality of support rods, and a plurality of the support steel frames are fixedly connected with a tray for placing the rock sample at the upper end.

[0007] As the preferred of above technical scheme, the drive mechanism includes a support ring, the support ring is fixedly connected on the upper end of the plurality of support columns, a first bearing is fixedly sleeved at the inner center of the support ring, a second bearing is fixedly sleeved at the inner side of the support ring, a support pipe is fixedly sleeved in the inner ring of the first bearing, and a first rotating shaft is fixedly sleeved in the inner ring of the second bearing.

[0008] As the preferred of above technical scheme, a first external gear ring is arranged at the lower end center of the support ring, the first external gear ring is fixedly sleeved at the lower side of the support pipe, a first driving gear is fixedly connected at the lower end of the first rotating shaft, the diameter of the first driving gear is smaller than that of the first external gear ring, the first driving gear and the first external gear ring are in gear meshing transmission, a lower protection cover is fixedly connected at the lower end of the support ring for protecting the first external gear ring and the first driving gear, a first stepping motor is fixedly connected at the side close to the first driving gear at the lower end of the lower protection cover, the output end of the first stepping motor penetrates through the lower end of the lower protection cover and reaches the inside of the lower protection cover, and the output end of the first stepping motor is fixedly connected with the lower end center of the first driving gear.

[0009] As the preferred technical scheme of the above, the lateral pressure applying mechanism comprises a rotating disc arranged at the upper end of the supporting ring, and the rotating disc is fixedly sleeved on the upper side of the outer side of the supporting ring, the upper end center of the rotating disc is fixedly connected with two vertical plates on both sides, the distal ends of the two vertical plates are fixedly connected with a plurality of reinforcing ribs in an array, the lower ends of the reinforcing ribs are fixedly connected with the upper end of the rotating disc, the lower sides of the inner center of the two vertical plates are fixedly connected with a supporting plate, the inner center of the two vertical plates is sleeved with a hydraulic push rod on both sides, the upper ends of the four supporting plates are fixedly connected with the four hydraulic push rods respectively, the telescopic ends of the two supporting plates on one side are fixedly connected with the telescopic ends of the two hydraulic push rods on the other side, the sides of the two clamping plates close to each other are fixedly connected with pressure sensors, the sides of the two pressure sensors close to each other are respectively in contact with the sides of the rock sample away from each other, and the upper end center of the rotating disc is fixedly connected with guide rods on both sides.

[0010] As the preferred technical scheme of the above, the lower pressing mechanism comprises two arc-shaped plates fixedly connected with the upper ends of the two vertical plates, a supporting plate fixedly connected between the two arc-shaped plates, a third bearing fixedly sleeved in the inner center of the supporting plate, a fourth bearing fixedly sleeved on one side of the inner side of the supporting plate, and an inner thread sleeve fixedly sleeved in the third bearing.

[0011] As the preferred technical scheme of the above, the inner ring of the fourth bearing is fixedly sleeved with a second rotating shaft, the outer side of the inner thread sleeve is fixedly sleeved with a second outer gear ring on the upper side, the high end of the second rotating shaft is fixedly connected with a second driving gear, the diameter of the second driving gear is smaller than that of the second outer gear ring, the second driving gear and the second outer gear ring are in gear meshing transmission, the upper end of the supporting plate is fixedly connected with an upper protective cover for protecting the second outer gear ring and the second driving gear, the side of the top end of the upper protective cover is fixedly connected with a second stepping motor, the output end of the second stepping motor penetrates through the upper end of the upper protective cover and extends to the inner side of the upper protective cover, and the output end of the second stepping motor is fixedly connected with the upper end center of the second driving gear.

[0012] As the preferred technical scheme of the above, the inner thread sleeve is sleeved with a screw rod in the inner thread, the lower end of the screw rod is fixedly connected with a butt joint disc, the inner center of the butt joint disc is fixedly sleeved with a balance bar, the two ends of the balance bar are fixedly connected with guide sleeves, the two guide sleeves are respectively slidably sleeved on the outer sides of the two guide rods, the lower end center of the butt joint disc is fixedly connected with a lower pressing column, the lower end of the lower pressing column is fixedly connected with a lower pressing disc, and the lower end of the lower pressing disc is in contact with the top end of the rock sample.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The triaxial testing machine for multi-axial precise testing of rock mechanics properties realizes precise pressure application and measurement of the rock sample in the multi-axial direction through the precise cooperation of various mechanisms, the load bearing assembly provides a stable support platform, and the pressure weight applied is monitored in real time through the electronic weighing disc, the driving mechanism ensures that the lateral pressure application mechanism and the downward pressure mechanism can accurately rotate around the rock sample, avoiding unsafe factors and errors in traditional manual operation;

[0015] The lateral pressure application mechanism precisely applies pressure through the hydraulic push rod and feeds back the pressure state in real time through the pressure sensor, and the downward pressure mechanism precisely controls the longitudinal pressure through the screw rod, ensuring uniform and stable application, the synergistic effect of various components not only improves the precision and efficiency of the test process, but also effectively guarantees the safety of the experiment and provides stable and reliable data support. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective structural schematic diagram of the triaxial testing machine for multi-axial precise testing of rock mechanics properties;

[0017] Figure 2 It is a perspective structural schematic diagram of the triaxial testing machine for multi-axial precise testing of rock mechanics properties from another angle;

[0018] Figure 3 It is a perspective structural schematic diagram of the triaxial testing machine for multi-axial precise testing of rock mechanics properties;

[0019] Figure 4 It is a perspective structural schematic diagram of the triaxial testing machine for multi-axial precise testing of rock mechanics properties from another angle;

[0020] Figure 5 It is a perspective structural schematic diagram of the load bearing assembly of the triaxial testing machine for multi-axial precise testing of rock mechanics properties;

[0021] Figure 6 It is a perspective structural schematic diagram of the driving mechanism of the triaxial testing machine for multi-axial precise testing of rock mechanics properties;

[0022] Figure 7 It is a perspective structural schematic diagram of the lateral pressure application mechanism of the triaxial testing machine for multi-axial precise testing of rock mechanics properties;

[0023] Figure 8 It is a perspective structural schematic diagram of the downward pressure mechanism of the triaxial testing machine for multi-axial precise testing of rock mechanics properties;

[0024] Figure 9 It is a perspective structural schematic diagram of the downward pressure mechanism of the triaxial testing machine for multi-axial precise testing of rock mechanics properties from another angle.

[0025] LEGEND:

[0026] 1, bearing assembly; 101, bearing disc; 102, support column; 103, electronic weighing disc; 104, support rod; 105, support steel frame; 106, tray; 2, driving mechanism; 201, support ring; 202, first bearing; 203, second bearing; 204, support tube; 205, first rotating shaft; 206, first outer gear ring; 207, first driving gear; 208, lower protective cover; 209, first stepping motor; 3, lateral pressure applying mechanism; 301, rotating disc; 302, vertical plate; 303, reinforcing rib; 304, supporting plate; 305, hydraulic push rod; 306, clamping plate; 307, pressure sensor; 308, guide rod; 4, pressing mechanism; 401, arched plate; 402, support plate; 403, third bearing; 404, fourth bearing; 405, internally threaded sleeve; 406, second rotating shaft; 407, second outer gear ring; 408, second driving gear; 409, upper protective cover; 4010, second stepping motor; 4011, screw rod; 4012, butt joint disc; 4013, balance bar; 4014, guide sleeve; 4015, pressing column; 4016, pressing disc; 5, rock sample. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings of the embodiments of the present application.

[0028] Please refer to Figures 1-4 As shown in the figure, the utility model provides a technical scheme: a triaxial testing machine for multi-axial precise testing of rock mechanical properties, which comprises a rock sample 5, a lateral pressure applying mechanism 3 arranged on the outer side of the rock sample 5 for pressing and clamping the two walls of the rock sample 5 away from each other, a pressing mechanism 4 arranged at the upper end of the rock sample 5 for pressing the upper end of the rock sample 5 longitudinally, a bearing assembly 1 arranged at the lower end of the rock sample 5 for measuring the pressure weight applied by the pressing mechanism 4 to the rock sample 5, and a driving mechanism 2 arranged at the upper end of the bearing assembly 1 for driving the lateral pressure applying mechanism 3 and the pressing mechanism 4 to rotate around the rock sample 5. The triaxial testing machine for multi-axial precise testing of rock mechanical properties realizes precise pressing and measuring of the rock sample 5 in the multi-axial direction through the precise cooperation of various mechanisms, the bearing assembly 1 provides a stable support platform, and the applied pressure weight is monitored in real time through the electronic weighing disc 103, the driving mechanism 2 ensures that the lateral pressure applying mechanism 3 and the pressing mechanism 4 can rotate accurately around the rock sample 5, avoiding unsafe factors and errors in traditional manual operation, the lateral pressure applying mechanism 3 accurately applies pressure through the hydraulic push rod 305 and feeds back the pressure state in real time through the pressure sensor 307, and the pressing mechanism 4 accurately controls the longitudinal pressure through the screw rod 4011, ensuring uniform and stable application. The synergistic effect of various components not only improves the precision and efficiency of the testing process, but also effectively ensures the safety of the experiment and provides stable and reliable data support.

[0029] As an embodiment in the present embodiment, please refer to Figure 5 As shown, the load-bearing assembly 1 includes a support disc 101, a plurality of support columns 102 are fixedly connected in a ring shape at the upper end of the support disc 101, an electronic weighing disc 103 is fixedly installed at the upper end of the support disc 101, a plurality of support rods 104 are fixedly connected in a ring shape at the upper end of the electronic weighing disc 103, a support steel frame 105 is fixedly connected between the plurality of support rods 104, a tray 106 for placing the rock sample 5 is fixedly connected to the upper end of the support steel frame 105, the load-bearing assembly 1 supports the rock sample 5 through the support disc 101, and the pressure weight exerted by the pressing mechanism 4 on the rock sample 5 is accurately measured by using the electronic weighing disc 103, the plurality of support columns 102 arranged in a ring shape at the upper end of the support disc 101 enhances the support force, ensures that the rock sample 5 is stably placed, and avoids tilting or deviation when the pressure is applied, the structure of the support steel frame 105 and the tray 106 ensures that the rock sample 5 can uniformly bear external force, provides a stable platform for mechanical experiments, and the electronic weighing disc 103 can monitor the applied pressure in real time, providing accurate reference for experimental data. The design effectively improves the stability and accuracy of the pressure application process, ensures that the rock sample 5 is not disturbed by the outside world during the test process, and provides reliable data support.

[0030] As an embodiment in the present embodiment, please refer to Figure 6As shown, the driving mechanism 2 comprises a support ring 201 fixedly connected to the upper ends of the plurality of support columns 102, a first bearing 202 fixedly sleeved at the inner center of the support ring 201, a second bearing 203 fixedly sleeved at the inner side of the support ring 201, a support tube 204 fixedly sleeved at the inner ring of the first bearing 202, a first rotating shaft 205 fixedly sleeved at the inner ring of the second bearing 203, a first external gear ring 206 provided at the lower center of the support ring 201, the first external gear ring 206 fixedly sleeved at the lower outer side of the support tube 204, a first driving gear 207 fixedly connected to the lower end of the first rotating shaft 205, the diameter of the first driving gear 207 being smaller than that of the first external gear ring 206, and the first driving gear 207 and the first external gear ring 206 being in gear mesh transmission, a lower protective cover 208 fixedly connected to the lower end of the support ring 201 for protecting the first external gear ring 206 and the first driving gear 207, a first stepping motor 209 fixedly connected to the side of the first driving gear 207 close to the lower end of the lower protective cover 208, the output end of the first stepping motor 209 penetrating through the lower end of the lower protective cover 208 to the inside of the lower protective cover 208, and the output end of the first stepping motor 209 fixedly connected to the lower center of the first driving gear 207. The driving mechanism 2 drives the first driving gear 207 through the first stepping motor 209, and drives the first external gear ring 206 through gear mesh transmission, drives the support ring 201 and other components to rotate, the support tube 204 provides stable support for rotation, so that the overall structure rotates stably, the rotation angle is accurately controlled through the first stepping motor 209, and it is ensured that the lateral pressing mechanism 3 and the downward pressing mechanism 4 can accurately rotate around the rock sample 5. This kind of accurate rotation control improves the pressure applying precision in rock mechanics test, can avoid errors or unsafe factors caused by manual operation, and ensures the efficiency and safety of the experimental process.

[0031] As an embodiment in the present embodiment, please refer to Figure 7As shown, the lateral pressing mechanism 3 comprises a rotating disc 301 arranged at the upper end of the support ring 201, and the rotating disc 301 is fixedly sleeved outside the upper part of the support ring 201, the upper end of the rotating disc 301 is fixedly connected with two vertical plates 302 at both sides, the ends of the two vertical plates 302 away from each other are fixedly connected with a plurality of reinforcing ribs 303, the lower ends of the reinforcing ribs 303 are fixedly connected with the upper end of the rotating disc 301, the inner center of the two vertical plates 302 is fixedly connected with a supporting plate 304 at both sides, the inner center of the two vertical plates 302 is sleeved with a hydraulic push rod 305 at both sides, the upper end of the four hydraulic push rods 305 is fixedly connected with the four supporting plates 304, the telescopic ends of the two supporting plates 304 at one side are fixedly connected with the telescopic ends of the two hydraulic push rods 305 at the other side, the side of the two clamping plates 306 close to each other is fixedly connected with a pressure sensor 307, the side of the two pressure sensors 307 close to each other is respectively in contact with the side of the rock sample 5 away from each other, the upper end of the rotating disc 301 is fixedly connected with a guide rod 308 at both sides, the lateral pressing mechanism 3 applies pressure to the rock sample 5 through the supporting plate 304 by the hydraulic push rod 305, the rotating disc 301 rotates through the support ring 201, drives the vertical plate 302 and the hydraulic push rod 305 on both sides to apply uniform pressure to the rock sample 5 in the horizontal direction, the pressure sensor 307 on the clamping plate 306 can monitor the pressure applied to the rock sample 5 in real time, ensure uniform and accurate pressure, this pressure applying method greatly improves the stability and consistency of the experiment, reduces the human operation error, also improves the repeatability of the test, due to the accurate adjustment of the hydraulic push rod 305, the pressure control in the experimental process is more flexible and controllable.

[0032] As an embodiment in the present embodiment, please refer to Figures 8-9As shown, the pressing mechanism 4 comprises two arched plates 401 fixedly connected to the upper ends of the two vertical plates 302, a support plate 402 fixedly connected between the two arched plates 401, a third bearing 403 fixedly sleeved at the inner center of the support plate 402, a fourth bearing 404 fixedly sleeved at one side of the inner center of the support plate 402, an inner threaded sleeve 405 fixedly sleeved at the inner ring of the third bearing 403, a second rotating shaft 406 fixedly sleeved at the inner ring of the fourth bearing 404, a second outer gear ring 407 fixedly sleeved at the upper outer side of the inner threaded sleeve 405, a second driving gear 408 fixedly connected to the high end of the second rotating shaft 406, the diameter of the second driving gear 408 being smaller than that of the second outer gear ring 407, and the second driving gear 408 and the second outer gear ring 407 being in gear meshing transmission, an upper protective cover 409 fixedly connected to the upper end of the support plate 402 for protecting the second outer gear ring 407 and the second driving gear 408, a second stepper motor 4010 fixedly connected to one side of the top end of the upper protective cover 409, the output end of the second stepper motor 4010 penetrating through the upper end of the upper protective cover 409 and extending into the inner part of the upper protective cover 409, and the output end of the second stepper motor 4010 being fixedly connected to the upper end center of the second driving gear 408, a screw rod 4011 threadedly sleeved in the inner part of the inner threaded sleeve 405, a butt joint disc 4012 fixedly connected to the lower end of the screw rod 4011, a balance rod 4013 fixedly sleeved at the inner center of the butt joint disc 4012, guide sleeves 4014 fixedly connected to the two ends of the balance rod 4013, the two guide sleeves 4014 being slidingly sleeved on the outer sides of the two guide rods 308, a pressing column 4015 fixedly connected to the lower end center of the butt joint disc 4012, a pressing disc 4016 fixedly connected to the lower end of the pressing column 4015, the lower end of the pressing disc 4016 being in contact with the top end of the rock sample 5, the pressing mechanism 4 being fixedly installed through the two arched plates 401 and the support plate 402, the screw rod 4011 being used to drive the pressing disc 4016 to apply longitudinal pressure to the rock sample 5, the second stepper motor 4010 being used to drive the second driving gear 408 to drive the second outer gear ring 407, so as to realize accurate pressure control, the size of the pressure being adjusted through the screw rod 4011, the pressure being uniformly applied, the instability and unevenness in the pressure application process being avoided, the design of the pressing mechanism 4 making the longitudinal pressure application more stable, and the longitudinal pressure application being flexibly adjusted according to different experimental requirements, the precise pressure control system ensuring the multi-axis accurate testing of the rock sample 5 in the experiment, and improving the accuracy of the data and the reliability of the experimental results.

[0033] Working principle: the load-bearing assembly 1 supports the rock sample 5 through the supporting disc 101, and the pressure weight applied by the pressing mechanism 4 on the rock sample 5 is accurately measured by using the electronic weighing disc 103, the multiple support columns 102 arranged in a ring shape at the upper end of the supporting disc 101 enhance the supporting force, and the rock sample 5 is stably placed to avoid tilting or deviation when the pressure is applied, the structure of the supporting steel frame 105 and the tray 106 ensures that the rock sample 5 can uniformly bear external force and provide a stable platform for mechanical experiments, the electronic weighing disc 103 can monitor the applied pressure in real time and provide accurate reference for experimental data, the design effectively improves the stability and accuracy of the pressure application process, ensures that the rock sample 5 is not disturbed by the outside during the test process, and provides reliable data support, the driving mechanism 2 drives the first driving gear 207 through the first stepping motor 209, and drives the first outer gear ring 206 through gear meshing transmission, drives the supporting ring 201 and other components to rotate, the supporting pipe 204 provides stable support for rotation, so that the overall structure rotates smoothly, the rotation angle is accurately controlled through the first stepping motor 209, so that the lateral pressure applying mechanism 3 and the pressing mechanism 4 can accurately rotate around the rock sample 5, this accurate rotation control improves the pressure application accuracy in rock mechanics test, which can avoid errors or unsafe factors caused by manual operation, and ensures the efficiency and safety of the experimental process, the lateral pressure applying mechanism 3 applies pressure to the rock sample 5 through the supporting plate 304 by using the hydraulic push rod 305, the turntable 301 rotates through the supporting ring 201, drives the two side vertical plates 302 and the hydraulic push rod 305 to apply uniform pressure to the rock sample 5 along the horizontal direction, and the pressure sensor 307 on the clamping plate 306 can monitor the pressure applied on the rock sample 5 in real time, so that the pressure is uniform and accurate, this pressure applying mode greatly improves the stability and consistency of the experiment, reduces the human operation error, and improves the repeatability of the test, due to the accurate adjustment of the hydraulic push rod 305, the pressure control in the experimental process is more flexible and controllable, the pressing mechanism 4 is fixedly installed through the two arch-shaped plates 401 and the supporting plate 402, and the longitudinal pressure is applied to the rock sample 5 by using the screw rod 4011 to drive the pressing disc 4016, the second stepping motor 4010 drives the second driving gear 408 to drive the second outer gear ring 407, so that accurate pressure control is realized, the size of the pressure is adjusted through the screw rod 4011, so that the pressure is uniformly applied, and the instability and unevenness in the pressure application process are avoided, the design of the pressing mechanism 4 makes the longitudinal pressure more stable, and flexible adjustment can be made according to different experimental requirements, and the precise pressure control system ensures the multi-axis accurate test of the rock sample 5 in the experiment, improves the accuracy of the data and the reliability of the experimental results.

[0034] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them.

Claims

1. A triaxial testing machine for multiaxial precision testing of rock mechanical properties, characterized in that: The sample includes a rock sample (5), on the outside of which a lateral pressure mechanism (3) is provided for clamping the rock sample (5) away from the two walls. A downward pressure mechanism (4) is provided at the upper end of the rock sample (5) for applying pressure longitudinally to the upper end of the rock sample (5). A load-bearing component (1) is provided at the lower end of the rock sample (5) for measuring the weight of the pressure applied to the rock sample (5) by the downward pressure mechanism (4). A drive mechanism (2) is provided at the upper end of the load-bearing component (1) for driving the lateral pressure mechanism (3) and the downward pressure mechanism (4) to rotate around the rock sample (5).

2. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 1, characterized in that: The load-bearing component (1) includes a support plate (101), and multiple support columns (102) are fixedly connected in a ring at the center of the upper end of the support plate (101) near the edge. An electronic weighing plate (103) is fixedly installed at the center of the upper end of the support plate (101). Multiple support rods (104) are fixedly connected in a ring at the center of the upper end of the electronic weighing plate (103) near the edge. Support steel frames (105) are fixedly connected between the multiple support rods (104). A tray (106) for placing rock samples (5) is fixedly connected to the upper end of the multiple support steel frames (105).

3. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 2, characterized in that: The drive mechanism (2) includes a support ring (201), which is fixedly connected to the upper end of a plurality of support columns (102). A first bearing (202) is fixedly sleeved at the center of the inside of the support ring (201), and a second bearing (203) is fixedly sleeved on one side of the inside of the support ring (201). A support tube (204) is fixedly sleeved on the inner ring of the first bearing (202), and a first rotating shaft (205) is fixedly sleeved on the inner ring of the second bearing (203).

4. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 3, characterized in that: A first external gear ring (206) is provided at the center of the lower end of the support ring (201). The first external gear ring (206) is fixedly sleeved on the lower outer side of the support tube (204). A first drive gear (207) is fixedly connected to the lower end of the first rotating shaft (205). The diameter of the first drive gear (207) is smaller than that of the first external gear ring (206), and the first drive gear (207) and the first external gear ring (206) are engaged by gear meshing. The lower end of the support ring (201) is fixed A lower protective cover (208) is connected to protect the first external gear ring (206) and the first drive gear (207). A first stepper motor (209) is fixedly connected to the lower end of the lower protective cover (208) near the first drive gear (207). The output end of the first stepper motor (209) passes through the lower end of the lower protective cover (208) and extends into the interior of the lower protective cover (208). The output end of the first stepper motor (209) is fixedly connected to the center of the lower end of the first drive gear (207).

5. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 3, characterized in that: The lateral pressure mechanism (3) includes a turntable (301), which is disposed on the upper end of the support ring (201) and is fixedly sleeved on the upper outer side of the support ring (201). Vertical plates (302) are fixedly connected to both sides of the upper center of the turntable (301). Several reinforcing ribs (303) are fixedly connected to the ends of the two vertical plates (302) that are far apart from each other. The lower ends of the reinforcing ribs (303) are fixedly connected to the upper end of the turntable (301). Support plates (304) are fixedly connected to the lower sides of the inner center of the two vertical plates (302). Hydraulic push rods (305) are fitted on both sides of the center of the turntable (301). The four hydraulic push rods (305) are fixedly connected to the upper ends of the four support plates (304). Two clamping plates (306) are fixedly connected to the telescopic ends of the two support plates (304) on one side and the telescopic ends of the two hydraulic push rods (305) on the other side. Pressure sensors (307) are fixedly connected to the sides of the two clamping plates (306) that are close to each other. The sides of the two pressure sensors (307) that are close to each other are in contact with the sides of the rock sample (5) that are far away from each other. Guide rods (308) are fixedly connected to both sides of the center of the upper end of the turntable (301).

6. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 3, characterized in that: The pressing mechanism (4) includes two arched plates (401), which are fixedly connected to the upper ends of two vertical plates (302) respectively. A support plate (402) is fixedly connected between the two arched plates (401). A third bearing (403) is fixedly sleeved at the center of the support plate (402). A fourth bearing (404) is fixedly sleeved at one end of the support plate (402). An internal threaded sleeve (405) is fixedly sleeved on the inner ring of the third bearing (403).

7. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 6, characterized in that: The inner ring of the fourth bearing (404) is fixedly fitted with a second rotating shaft (406). The outer side of the internal threaded sleeve (405) is fixedly fitted with a second external gear ring (407). The high end of the second rotating shaft (406) is fixedly connected with a second drive gear (408). The diameter of the second drive gear (408) is smaller than that of the second external gear ring (407). The second drive gear (408) and the second external gear ring (407) are gear meshing transmissions. The upper end of the support plate (402) is fixedly connected with an upper protective cover (409) for protecting the second external gear ring (407) and the second drive gear (408). The top of the upper protective cover (409) is fixedly connected to one side with a second stepper motor (4010). The output end of the second stepper motor (4010) passes through the upper end of the upper protective cover (409) and extends into the interior of the upper protective cover (409). The output end of the second stepper motor (4010) is fixedly connected to the center of the upper end of the second drive gear (408).

8. The triaxial testing machine for multiaxial precision testing of rock mechanical properties according to claim 7, characterized in that: The internal threaded sleeve (405) is threaded with a screw (4011). The lower end of the screw (4011) is fixedly connected to a docking plate (4012). A balance rod (4013) is fixedly sleeved at the center of the docking plate (4012). Guide sleeves (4014) are fixedly connected to both ends of the balance rod (4013). The two guide sleeves (4014) are slidably sleeved on the outside of the two guide rods (308). A pressure column (4015) is fixedly connected to the center of the lower end of the docking plate (4012). A pressure plate (4016) is fixedly connected to the lower end of the pressure column (4015). The lower end of the pressure plate (4016) is in contact with the top of the rock sample (5).

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