Brazilian splitting test device and method for full-process dynamic measurement

Abstract

The present application provides a Brazilian splitting test device and method with full-process dynamic measurement, which belongs to the field of rock mechanics technology. The method comprises: placing a rock sample on a lower clamp, moving an upper clamp close to the lower clamp to clamp the rock sample, applying pressure to the rock sample in the clamping cavity through the upper clamp and the lower clamp to perform a Brazilian splitting test on the rock sample; a displacement sensor assembly monitors the deformation of the rock sample during the process of the rock sample being subjected to pressure; and flexibly supporting an acoustic emission monitoring device through an acoustic emission flexible fixing assembly, placing the acoustic emission monitoring device against the end face of the rock sample. The acoustic emission flexible fixing assembly can make changes and adjustments in real time according to the damage of the rock sample, and will not constrain the free deformation of the rock sample during the test, thereby enabling the acoustic emission monitoring device to measure the damage of the rock sample in real time, thereby improving the accuracy of the Brazilian splitting test data and realizing flexible and dynamic measurement of the full-process test.

Description

Technical Field

[0001] The present application belongs to the technical field of rock mechanics, and specifically relates to a Brazilian splitting test device and method for full-process dynamic measurement. Background Art

[0002] The Brazilian split test is a method used to measure the tensile strength of rock. It determines the maximum stress a rock can withstand under tension, or its tensile strength. This parameter is crucial for evaluating rock mechanical properties and understanding the fracture initiation pressure during hydraulic fracturing. Currently, the installation of monitoring devices in Brazilian split tests restricts the free deformation of rock specimens during testing, affecting the accuracy of test data. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides a Brazilian splitting test device with full-process dynamic measurement.

[0005] A second aspect of the present invention provides a Brazilian splitting test method with full-process dynamic measurement.

[0006] In view of this, according to a first aspect of an embodiment of the present application, a Brazilian splitting test device with full-process dynamic measurement is proposed, comprising:

[0007] Support components;

[0008] A lower clamp, the lower clamp being arranged on the supporting assembly;

[0009] An upper clamp is arranged above the lower clamp, the upper clamp is slidably connected to the support assembly, and the upper clamp and the lower clamp enclose a clamping cavity to clamp the rock sample;

[0010] The displacement sensor assembly includes a plurality of displacement sensors, which are arranged outside the rock sample and are used to detect the deformation of the rock sample;

[0011] An acoustic emission flexible fixing component is provided, wherein an acoustic emission monitoring device is installed in the acoustic emission flexible fixing component, a first end of the acoustic emission flexible fixing component is arranged on the supporting component, and a second end of the acoustic emission flexible fixing component presses the acoustic emission monitoring device against the end face of the rock sample to flexibly support the acoustic emission monitoring device.

[0012] In a feasible embodiment, the rock sample is cylindrical, and the rock sample is placed horizontally on the lower fixture, with the axis of the rock sample extending along the width direction of the lower fixture;

[0013] The Brazilian splitting test device with full-process dynamic measurement also includes:

[0014] A first arc-shaped groove is provided on the top surface of the lower clamp along the width direction of the lower clamp;

[0015] A second arc-shaped groove is provided on the bottom surface of the upper clamp along the width direction of the upper clamp, and the second arc-shaped groove and the first arc-shaped groove are arranged to form a clamping cavity;

[0016] The curvature radius of the first arc-shaped groove is greater than the maximum curvature radius of the rock sample, and the curvature radius of the second arc-shaped groove is greater than the maximum curvature radius of the rock sample.

[0017] In one possible embodiment, the support assembly includes:

[0018] The base is horizontally arranged, and the two lower clamps are installed on the base; a positioning groove is opened on the top surface of the base, and the first end of the acoustic emission flexible fixing component is embedded in the positioning groove;

[0019] Two side panels are vertically arranged on the base, and two upper clamps are arranged between the two side panels, and the upper clamps correspond to the lower clamps one by one; the upper clamps are slidably connected to the side panels, and the upper clamps slide along the height direction of the side panels.

[0020] In one feasible implementation, the displacement sensor includes:

[0021] A vertical displacement sensor is arranged vertically, a first end of the vertical displacement sensor is disposed on the support assembly, and a second end of the vertical displacement sensor abuts against the upper fixture;

[0022] A horizontal displacement sensor is arranged horizontally, a first end of the horizontal displacement sensor is disposed on the support assembly, and a second end of the horizontal displacement sensor abuts against a side wall of the rock sample;

[0023] The vertical displacement sensors are symmetrically arranged at both ends of the lower fixture, and the horizontal displacement sensors are symmetrically arranged on both sides of the rock sample.

[0024] In a feasible embodiment, the Brazilian splitting test device for full-process dynamic measurement further includes:

[0025] an arc-shaped contact member disposed at the second end of the horizontal displacement sensor, the arc-shaped contact member being provided with a third arc-shaped groove, at least a portion of the rock sample being embedded in the third arc-shaped groove, and a side surface of the arc-shaped contact member close to the rock sample being in contact with a side wall of the rock sample;

[0026] The arc-shaped contact piece is elastic and elastically deforms when contacting the rock sample.

[0027] In one feasible implementation, the displacement sensor includes:

[0028] An installation section, wherein a first end of the installation section is fixedly connected to the support assembly;

[0029] a connecting section, wherein a first end of the connecting section is embedded in the second end of the mounting section, and the connecting section and the mounting section are rotatably connected;

[0030] a contact segment, wherein a first end of the contact segment is embedded in the second end of the connecting segment, and the contact segment is fixedly connected to the connecting segment;

[0031] The second end of the contact section abuts against the rock sample.

[0032] Alternatively, the second end of the contact segment abuts against the upper fixture;

[0033] The length of the installation section is greater than the sum of the lengths of the connecting section and the installation section.

[0034] In a feasible embodiment, the rock sample includes two end surfaces, and an acoustic emission flexible fixing component is provided on each end surface of the rock sample;

[0035] The acoustic emission flexible fixing assembly includes:

[0036] A flexible deformable component, the flexible deformable component includes a flexible member, a first end of the flexible deformable component is embedded in the support component, and a second end of the flexible deformable component is connected to the first end of the flexible deformable component through the flexible member;

[0037] The first end of the emission fixing assembly is detachably connected to the second end of the flexible deformation assembly, an acoustic emission monitoring device is installed on the second end of the emission fixing assembly, and the flexible deformation assembly presses the acoustic emission monitoring device against the end face of the rock sample.

[0038] In a feasible embodiment, the flexible deformation component further includes:

[0039] A triangular buckle, the triangular buckle being detachably connected to the launch fixing assembly;

[0040] A first connecting post is coaxially arranged with the triangular buckle, a first end of the first connecting post is embedded in the triangular buckle, and the first connecting post is rotatably connected to the triangular buckle;

[0041] Four flexible pressure legs, the flexible pressure legs are elastic, the four flexible pressure legs are evenly arranged along the circumference of the first connecting column, the first ends of the flexible pressure legs are arranged on the side walls of the first connecting column, and the second ends of the flexible pressure legs abut on the launch fixing assembly;

[0042] a first connecting arm, wherein a first end of the first connecting arm is connected to the second end of the first connecting post, and the first connecting arm and the first connecting post are arranged at an angle;

[0043] a second connecting arm, wherein a first end of the second connecting arm is rotatably connected to a second end of the first connecting arm via a first rotating shaft;

[0044] The first end of the flexible member is connected to the first connecting arm, and the second end of the flexible member is connected to the second connecting arm, so as to flexibly connect the first connecting arm and the second connecting arm.

[0045] In one feasible embodiment, the launch fixing assembly includes:

[0046] The triangular sleeve is connected with the triangular buckle by locking, and the triangular sleeve and the triangular buckle are coaxially arranged;

[0047] A second connecting post is connected to the triangular sleeve, and the second connecting post and the triangular sleeve are coaxially arranged;

[0048] Four extension rods, the four extension rods are evenly arranged along the circumference of the second connecting column, and the first ends of the extension rods are connected to the side walls of the second connecting column;

[0049] Four fixing hoops, each of which is provided on the second end of the extension rod and has a fixing groove for installing an acoustic emission monitoring device;

[0050] The acoustic emission monitoring device protrudes from the fixing groove so that the acoustic emission monitoring device fits the end face of the rock sample;

[0051] Among them, after the triangular sleeve is locked and connected with the triangular buckle, the fixing hoop abuts against the second end of the flexible pressure leg, and the fixing hoop corresponds to the flexible pressure leg one by one.

[0052] According to a second aspect of an embodiment of the present application, a Brazilian split test method with full-process dynamic measurement is proposed, and the measurement is performed using a Brazilian split test device with full-process dynamic measurement according to any of the above technical solutions, including:

[0053] preparing a rock sample and installing the rock sample into the clamping cavity;

[0054] Install the displacement sensor;

[0055] Assemble the acoustic emission flexible fixing assembly, install one end of the acoustic emission flexible fixing assembly on the support assembly, make the other end of the acoustic emission flexible fixing assembly fit the end surface of the rock sample, and install the acoustic emission monitoring device on the acoustic emission flexible fixing assembly;

[0056] Debug the displacement sensor and acoustic emission monitoring device and reset them to zero;

[0057] Apply downward load to the upper fixture and start the Brazilian splitting test of rock;

[0058] Record the data when the rock sample is destroyed.

[0059] Compared with the prior art, the Brazilian splitting test device and method of the present invention with full-process dynamic measurement has the following beneficial effects:

[0060] The Brazilian splitting test device with full-process dynamic measurement provided in the embodiment of the present application includes a support assembly, a lower clamp, an upper clamp, a displacement sensor assembly and an acoustic emission flexible fixing assembly. The rock sample is placed on the lower clamp, and the upper clamp is moved toward the lower clamp to gradually clamp the rock sample. Pressure is applied to the rock sample in the clamping cavity by the upper clamp and the lower clamp to perform a Brazilian splitting test on the rock sample; the displacement sensor assembly monitors the deformation of the rock sample during the process of the rock sample being compressed; the acoustic emission flexible fixing assembly flexibly supports the acoustic emission monitoring device and presses the acoustic emission monitoring device against the end face of the rock sample. The acoustic emission flexible fixing assembly can make changes and adjustments in real time according to the damage of the rock sample, and will not constrain the free deformation of the rock sample during the test, thereby enabling the acoustic emission monitoring device to measure the damage of the rock sample in real time, thereby improving the accuracy of the Brazilian splitting test data, realizing flexible and dynamic measurement of the full-process test, and improving the integrity of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0062] Figure 1 A schematic structural diagram of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0063] Figure 2 A front view of the base of a Brazilian splitting test device for full-process dynamic measurement according to an embodiment of the present application;

[0064] Figure 3 A top view of the base of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0065] Figure 4 A side view of the base of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0066] Figure 5 A front view of a side panel of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0067] Figure 6 A top view of a side panel of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0068] Figure 7 A side view of a side panel of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0069] Figure 8 A top view of an upper fixture of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0070] Figure 9 A schematic structural diagram of an arc-shaped contact member of a Brazilian splitting test device for full-process dynamic measurement according to an embodiment of the present application;

[0071] Figure 10 A schematic structural diagram of a displacement sensor of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0072] Figure 11 A schematic structural diagram of an acoustic emission flexible fixing assembly of a Brazilian splitting test apparatus for full-process dynamic measurement according to an embodiment of the present application;

[0073] Figure 12 A schematic structural diagram of the first angle of the assembled acoustic emission flexible fixing assembly of the Brazilian splitting test device for full-process dynamic measurement provided by an embodiment of the present application;

[0074] Figure 13 A schematic structural diagram of a second angle of an acoustic emission flexible fixing assembly after assembly of a Brazilian splitting test device for full-process dynamic measurement according to an embodiment of the present application;

[0075] Figure 14 A schematic structural diagram of the third angle of the assembled acoustic emission flexible fixing component of the Brazilian splitting test device for full-process dynamic measurement according to an embodiment of the present application;

[0076] Figure 15 A schematic structural diagram of a fixing hoop of a Brazilian splitting test device for full-process dynamic measurement according to an embodiment of the present application;

[0077] Figure 16 A schematic flowchart of the steps of a Brazilian splitting test method for full-process dynamic measurement according to an embodiment of the present application;

[0078] in, Figures 1 to 15 The corresponding relationship between the reference numerals and component names is as follows:

[0079] 1. Support assembly; 2. Lower fixture; 3. Upper fixture; 4. Displacement sensor; 5. Acoustic emission flexible fixing assembly; 6. First arcuate groove; 7. Second arcuate groove; 8. Arc-shaped contact member; 9. Side plate groove; 10. Slideway; 11. Lower fixture mounting groove; 13. Vertical displacement sensor mounting groove; 14. Horizontal displacement sensor mounting hole; 15. Positioning groove; 16. Circular groove; 17. Through groove; 18. Assembly groove; 19. Rock sample; 20. Mounting plate; 21. Acoustic emission monitoring device;

[0080] 101. Base; 102. Side panels;

[0081] 41. Vertical displacement sensor; 42. Horizontal displacement sensor;

[0082] 401, installation section; 402, connection section; 403, contact section;

[0083] 501, flexible deformation component; 502, launch fixing component;

[0084] 5011, triangular buckle; 5012, first connecting column; 5013, flexible press leg; 5014, first connecting arm; 5015, second connecting arm; 5016, first rotating axis; 5017, second rotating axis; 5018, flexible member;

[0085] 5021. Triangular sleeve; 5022. Second connecting column; 5023. Extension rod; 5024. Fixing hoop. DETAILED DESCRIPTION

[0086] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0087] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0088] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0089] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0090] like Figure 1 As shown, according to the first aspect of the embodiment of the present application, a Brazilian splitting test device with full-process dynamic measurement is proposed, including: a support assembly 1, a lower clamp 2, an upper clamp 3, a displacement sensor assembly and an acoustic emission flexible fixing assembly 5; the lower clamp 2 is arranged on the support assembly 1; the upper clamp 3 is arranged above the lower clamp 2, the upper clamp 3 is slidably connected to the support assembly 1, and the upper clamp 3 and the lower clamp 2 are arranged to form a clamping cavity to clamp the rock sample 19; the displacement sensor assembly includes a plurality of displacement sensors 4, the displacement sensor 4 is arranged on the outside of the rock sample 19, and the displacement sensor 4 at least detects the deformation of the rock sample 19; an acoustic emission monitoring device 21 is installed in the acoustic emission flexible fixing assembly 5, the first end of the acoustic emission flexible fixing assembly 5 is arranged on the support assembly 1, and the second end of the acoustic emission flexible fixing assembly 5 presses the acoustic emission monitoring device 21 against the end face of the rock sample 19 to flexibly support the acoustic emission monitoring device 21.

[0091] The Brazilian splitting test device with full-process dynamic measurement provided by the embodiment of the present application includes a support assembly 1, a lower clamp 2, an upper clamp 3, a displacement sensor assembly and an acoustic emission flexible fixing assembly 5. The rock sample 19 is placed on the lower clamp 2, and the upper clamp 3 is moved toward the lower clamp 2 to gradually clamp the rock sample 19. Pressure is applied to the rock sample 19 in the clamping cavity by the upper clamp 3 and the lower clamp 2 to perform a Brazilian splitting test on the rock sample 19; the displacement sensor assembly monitors the deformation of the rock sample 19 during the process of the rock sample 19 being compressed; the acoustic emission flexible fixing assembly 5 flexibly supports the acoustic emission monitoring device 21 and places the acoustic emission monitoring device 21 against the end face of the rock sample 19. The acoustic emission flexible fixing assembly 5 can make real-time changes and adjustments according to the damage of the rock sample 19, and will not restrict the free deformation of the rock sample 19 during the test, thereby enabling the acoustic emission monitoring device 21 to measure the damage of the rock sample 19 in real time, thereby improving the accuracy of the Brazilian splitting test data, realizing flexible and dynamic measurement of the full-process test, and improving the integrity of the test data.

[0092] Furthermore, the acoustic emission monitoring device 21 is an acoustic emission probe. The acoustic emission probe monitors the rock sample 19 based on the spontaneous acoustic wave signals generated by the rock sample 19 when subjected to mechanical stress by the upper and lower clamps 2. It is understood that when a crack forms in the rock sample 19, stress concentration at the crack tip triggers the propagation of elastic waves (such as shear waves and surface waves). During this propagation, the elastic waves generate characteristic acoustic emission signals due to changes in the medium properties. By collecting and analyzing these acoustic wave signals, it is possible to determine whether a crack exists in the rock sample 19, as well as information such as the crack's location, size, and propagation direction.

[0093] Existing rock Brazilian splitting test devices are roughly divided into two categories. One is to directly load the rock sample 19 through a tensile device or a pressure device until the rock sample 19 is destroyed, and then record the load size when the rock sample 19 is destroyed, and calculate the tensile strength through a formula. This type of test method is relatively simple and cannot record the data of the entire test process in detail; the other is to record the test process by rigidly installing a monitoring device. Although more data can be recorded, the rigid fixation of the monitoring device will constrain the free deformation of the rock sample 19 during the test, affecting the accuracy of the test data results. In the present application, pressure is applied to the rock sample 19 in the clamping cavity by the upper clamp 3 and the lower clamp 2 to generate cracks in the rock sample 19 and perform a Brazilian splitting test; the deformation of the rock sample 19 is monitored by the displacement sensor assembly during the process of the rock sample 19 being under pressure; the acoustic emission flexible fixing assembly 5 then flexibly supports the acoustic emission monitoring device 21, and the acoustic emission monitoring device 21 is pressed against the end face of the rock sample 19, so that the acoustic emission flexible fixing assembly 5 can make real-time changes and adjustments according to the damage of the rock sample 19, avoiding the installation of the acoustic emission monitoring device 21 to constrain the free deformation of the rock sample 19, and dynamically measuring the damage of the rock sample 19 in real time throughout the entire process, thereby improving the accuracy of the Brazilian splitting test data and improving the integrity of the test data.

[0094] like Figure 1 As shown, in a feasible embodiment, the rock sample 19 is cylindrical, and the rock sample 19 is placed horizontally on the lower clamp 2, and the axis of the rock sample 19 extends along the width direction of the lower clamp 2; the Brazilian splitting test device for full-process dynamic measurement also includes: a first arc groove 6 and a second arc groove 7; the first arc groove 6 is arranged on the top surface of the lower clamp 2 along the width direction of the lower clamp 2; the second arc groove 7 is arranged on the bottom surface of the upper clamp 3 along the width direction of the upper clamp 3, and the second arc groove 7 and the first arc groove 6 are arranged to form a clamping cavity; wherein, the curvature radius of the first arc groove 6 is greater than the maximum curvature radius of the rock sample 19, and the curvature radius of the second arc groove 7 is greater than the maximum curvature radius of the rock sample 19.

[0095] In this technical solution, a first arc groove 6 is provided on the lower clamp 2 and a second arc groove 7 is provided on the upper clamp 3 so that the loading contact surfaces of the upper clamp 3, the lower clamp 2 and the rock sample 19 form a progressive fit, which can alleviate the problem of local stress concentration caused by curvature mismatch in traditional clamps; through the symmetrical distribution of the first arc groove 6 and the second arc groove 7 and the closed design of the clamping cavity, it is ensured that the loading force is evenly transmitted along the diameter direction of the rock sample 19, forcing the crack to initiate in the center of the rock sample 19, and avoiding invalid tests due to loading offset.

[0096] In this technical solution, the setting of the first arc groove 6 and the second arc groove 7 enables the upper clamp 3 and the lower clamp 2 to adapt to rock samples 19 of different diameters after closing, and can meet the requirements of heterogeneous rocks or special sizes without replacing the clamps, thereby reducing the time for adjusting the device and improving the continuity of the test.

[0097] It should be noted that the automatic alignment of the first arc groove 6 and the second arc groove 7 can eliminate the step of manually placing the wire pads when installing the specimen using the traditional pad method, thereby reducing human errors and shortening the time of a single test.

[0098] like Figures 1 to 7 As shown, in a feasible embodiment, the support assembly 1 includes: a base 101 and two side panels 102; the base 101 is horizontally arranged, and the two lower clamps 2 are installed on the base 101; a positioning groove 15 is provided on the top surface of the base 101, and the first end of the acoustic emission flexible fixing assembly 5 is embedded in the positioning groove 15; the side panels 102 are vertically arranged on the base 101, and the two upper clamps 3 are slidably connected to the side panels 102, and the upper clamps 3 can slide along the height direction of the side panels 102, and the upper clamps 3 correspond one-to-one to the lower clamps 2.

[0099] In this technical solution, two lower clamps 2 are provided on the base 101, and two upper clamps 3 are slidably connected to the side plate 102. The two lower clamps 2 correspond to one upper clamp 3 respectively, so as to form two clamping cavities, so that two rock samples 19 can be tested at the same time, which speeds up the test progress and facilitates the comparison of the test, so that the control test results can be clearly compared.

[0100] In some examples, the top surface of the base 101 is provided with side panel slots 9 that match the structure of the side panels 102 and are used to mount the left and right side panels 102. Slideways 10 are provided on the side panels 102, and the upper clamp 3 is slidably connected within the slideways, allowing the upper clamp 3 to move up and down along the height direction of the side panels 102. When the upper clamp 3 approaches the lower clamp 2, it presses the rock sample 19 tightly, and when the upper clamp 3 moves away from the lower clamp 2, the rock sample 19 is released.

[0101] In some examples, a lower fixture mounting groove 11 is further provided on the top surface of the base 101 , and a mounting portion is provided on the bottom surface of the lower fixture 2 , which is embedded in the lower fixture mounting groove 11 to position the lower fixture 2 .

[0102] like Figure 1 As shown, in a feasible embodiment, the displacement sensor 4 includes: a vertical displacement sensor 41 and a horizontal displacement sensor 42; the vertical displacement sensor 41 is arranged vertically, the first end of the vertical displacement sensor 41 is set on the support assembly 1, and the second end of the vertical displacement sensor 41 is abutted against the upper clamp 3; the horizontal displacement sensor 42 is arranged horizontally, the first end of the horizontal displacement sensor 42 is set on the support assembly 1, and the second end of the horizontal displacement sensor 42 is abutted against the side wall of the rock sample 19; wherein, the vertical displacement sensor 41 is symmetrically arranged at both ends of the lower clamp 2, and the horizontal displacement sensor 42 is symmetrically arranged on both sides of the rock sample 19.

[0103] In this technical solution, the vertical displacement sensor 41 is vertically arranged between the base 101 and the upper clamp 3, and indirectly monitors the longitudinal deformation of the rock sample 19 by measuring the distance between the base 101 and the upper clamp 3; the horizontal displacement sensor 42 is horizontally arranged between the side plate 102 and the rock sample 19 to directly monitor the lateral deformation of the rock sample 19. It can make corresponding changes and adjustments according to the damage of the rock sample 19, without restricting the free deformation of the rock sample 19 during the test, and realizes real-time dynamic monitoring of the longitudinal and lateral deformations of the rock sample 19.

[0104] Further, such as Figure 3 and Figure 8 As shown, a vertical displacement sensor mounting groove 13 is also provided on the top surface of the base 101, and the vertical displacement sensor mounting groove 13 is located on the outside of the lower clamp 2 to fix the first end of the vertical displacement sensor 41 on the base 101; a mounting plate 20 is provided on the side wall of the upper clamp 3, and the second end of the vertical displacement sensor 41 is in contact with the mounting plate 20, and the vertical deformation of the rock sample 19 is measured throughout the entire process through the lifting and lowering movement of the mounting plate 20.

[0105] like Figure 1 and Figure 9 As shown, in a feasible embodiment, the Brazilian splitting test device with full-process dynamic measurement also includes: an arc-shaped contact member 8, which is arranged at the second end of the horizontal displacement sensor 42, and a third arc-shaped groove is provided on the arc-shaped contact member 8, in which at least a portion of the rock sample 19 is embedded in the third arc-shaped groove, and a side of the arc-shaped contact member 8 close to the rock sample 19 can be completely fitted with the side wall of the rock sample 19; wherein, the arc-shaped contact member 8 is elastic and can undergo elastic deformation when contacting the rock sample 19.

[0106] In this technical solution, an arc-shaped contact piece 8 is provided at the second end of the horizontal displacement sensor 42 to increase the contact area between the horizontal displacement sensor 42 and the rock sample 19, thereby improving the contact stability between the horizontal displacement sensor 42 and the rock sample 19; the arc-shaped contact piece 8 is elastic and can produce elastic deformation after being compressed, so as to avoid the arc-shaped contact piece 8 restricting the deformation of the rock sample 19 during the test, thereby ensuring the accuracy of the monitoring results of the horizontal displacement sensor 42.

[0107] Furthermore, each rock sample 19 corresponds to two horizontal displacement sensors 42, and the horizontal displacement sensors 42 are symmetrically arranged at both ends of the lower clamp 2 along the axis of the lower clamp 2; the contact surface between the arc contact piece 8 and the rock sample 19 is arc-shaped. During the test, the two arc contact pieces 8 are respectively in contact with the left and right sides of the rock sample 19.

[0108] Furthermore, the arc-shaped contact member 8 is made of a soft material to ensure that the arc-shaped contact member 8 does not rigidly restrict the deformation of the rock sample 19 during the test.

[0109] Furthermore, the first end of the horizontal displacement sensor 42 is installed in the horizontal displacement sensor mounting hole 14 on the side plate 102, and the second end of the horizontal displacement sensor 42 is inserted into the circular groove 16 of the arc-shaped contact member 8, so that the horizontal displacement sensor 42 is in stable contact with the arc-shaped side wall of the rock sample 19, thereby ensuring the accuracy of the vertical deformation measurement results of the rock sample 19.

[0110] like Figure 10 As shown, in a feasible embodiment, the displacement sensor 4 includes: a mounting section 401, a connecting section 402 and a contact section 403; the first end of the mounting section 401 is fixedly connected to the support assembly 1; the first end of the connecting section 402 is embedded in the second end of the mounting section 401, and the connecting section 402 is rotatably connected to the mounting section 401; the first end of the contact section 403 is embedded in the second end of the connecting section 402, and the contact section 403 is fixedly connected to the connecting section 402; the second end of the contact section 403 abuts against the rock sample 19, or the second end of the contact section 403 abuts against the upper clamp 3; wherein the length of the mounting section 401 is greater than the sum of the lengths of the connecting section 402 and the mounting section 401.

[0111] In this technical solution, the horizontal displacement sensor 42 and the vertical displacement sensor 41 have the same structure, each comprising a mounting section 401, a connecting section 402, and a contact section 403. The diameters of the mounting section 401, connecting section 402, and contact section 403 decrease in order, with the contact section 403 having the smallest diameter and the mounting section 401 having the largest diameter. The connecting section 402 is rigidly connected to the contact section 403, while the connecting section 402 is non-rigidly connected to the mounting section 401. At least a portion of the connecting section 402 is embedded within the mounting section 401. By rotating the connecting section 402 relative to the mounting section 401, the length of the connecting section 402 extending outside the mounting section 401 can be adjusted, thereby adjusting the initial displacement of the displacement sensor 4. This allows displacement data to be leveled before a test begins, improving the accuracy and effectiveness of the monitoring results of the displacement sensor 4. The length of the mounting section 401 is greater than the sum of the lengths of the connecting section 402 and the mounting section 401, thereby increasing the length adjustment range of the displacement sensor 4 and thereby increasing the detectable range of the displacement sensor 4.

[0112] Furthermore, the mounting section 401 is a hollow cavity with an opening at one end, an internal thread is provided on the inner wall of the mounting section 401, and an external thread is provided on the outer wall of the connecting section 402. The connecting section 402 is threadedly connected to the mounting section 401 so that the length of the connecting section 402 can be adjusted by screwing the connecting section 402 or the mounting section 401, and the thread has self-locking and anti-loosening functions, which can ensure the stability and reliability of the non-rigid connection between the connecting section 402 and the mounting section 401.

[0113] Furthermore, the contact segment 403 of the displacement sensor 4 is embedded in the circular groove 16 of the arc-shaped contact member 8 to ensure the stability of the connection between the arc-shaped contact member 8 and the contact segment 403 .

[0114] like Figures 11 to 14 As shown, in a feasible embodiment, the rock sample 19 includes two end faces, and an acoustic emission flexible fixing component 5 is provided on the end face of each rock sample 19; the acoustic emission flexible fixing component 5 includes: a flexible deformation component 501 and an emission fixing component 502; the flexible deformation component 501 includes a flexible part 5018, the first end of the flexible deformation component 501 is embedded in the support component 1, and the second end of the flexible deformation component 501 is connected to the first end of the flexible deformation component 501 through the flexible part 5018; the first end of the emission fixing component 502 is detachably connected to the second end of the flexible deformation component 501, and the acoustic emission monitoring device 21 is installed on the second end of the emission fixing component 502, and the flexible deformation component 501 presses the acoustic emission monitoring device 21 against the end face of the rock sample 19.

[0115] In this technical solution, the flexible deformation component 501 is installed on the support component 1, and the emission fixing component 502 is used to install the acoustic emission monitoring device 21. After the flexible deformation component 501 is connected to the emission fixing component 502, the flexible deformation component 501 provides support force for the emission fixing component 502, so that the emission fixing component 502 can press the acoustic emission monitoring device 21 on the end face of the rock sample 19; the two ends of the flexible deformation component 501 are flexibly connected by the flexible part 5018, so that the flexible deformation component 501 has both deformation ability and support effect on the emission fixing component 502, thereby preventing the emission fixing component 502 from sliding down due to gravity, so that the acoustic emission monitoring device 21 can maintain continuous and stable contact with the rock sample 19 under flexible support without affecting the free deformation of the rock sample 19, thereby ensuring the accuracy of the test data monitored by the acoustic emission monitoring device 21.

[0116] Furthermore, a positioning groove 15 for the transmitting flexible fixing component is also provided on the top surface of the base 101, and the first end of the flexible deformation component 501 is embedded in the positioning groove 15 to prevent the transmitting flexible fixing component from slipping, thereby ensuring the reliability and stability of the flexible support of the transmitting flexible fixing component for the acoustic emission monitoring device 21, thereby avoiding the acoustic emission monitoring device 21 from falling or sliding, so as to improve the effectiveness of the monitoring results of the acoustic emission monitoring device 21.

[0117] like Figures 11 to 14 As shown, in a feasible embodiment, the flexible deformation component 501 further includes: a triangular buckle 5011, a first connecting column 5012, four flexible pressure legs 5013, a first connecting arm 5014 and a second connecting arm 5015; the triangular buckle 5011 is detachably connected to the launch fixing component 502; the first connecting column 5012 is coaxially arranged with the triangular buckle 5011, the first end of the first connecting column 5012 is embedded in the triangular buckle 5011, and the first connecting column 5012 is rotatably connected to the triangular buckle 5011; the flexible pressure legs 5013 are elastic, and the four flexible pressure legs 5013 are evenly arranged along the circumference of the first connecting column 5012, and the first end of the flexible pressure legs 5013 is arranged on the first connecting column 5 012, the second end of the flexible pressure leg 5013 abuts against the launch fixing assembly 502; the first end of the first connecting arm 5014 is connected to the second end of the first connecting column 5012, and the first connecting arm 5014 and the first connecting column 5012 are arranged at an angle; the first end of the second connecting arm 5015 is rotatably connected to the second end of the first connecting arm 5014 through a first rotating shaft 5016, and the second end of the second connecting arm 5015 is rotatably connected to the second rotating shaft 5017; the first end of the flexible member 5018 is connected to the first connecting arm 5014, and the second end of the flexible member 5018 is connected to the second connecting arm 5015, so as to flexibly connect the first connecting arm 5014 and the second connecting arm 5015.

[0118] In this technical solution, the flexible deformation component 501 is detachably connected to the launch fixing component 502 through a triangular buckle 5011; four flexible pressure legs 5013 are provided on the side wall of the first connecting column 5012, and the first connecting column 5012 is rotated relative to the launch fixing component 502 to drive the flexible pressure legs 5013 to rotate synchronously, thereby adjusting the relative position of the flexible pressure legs 5013 and the launch fixing component 502, so that the flexible pressure legs 5013 can be aligned with the acoustic emission monitoring device 21 installed on the launch fixing component 502, thereby utilizing the flexible pressure legs 5013 to flexibly support the acoustic emission monitoring device 21; the first connecting arm 5014 is fixedly connected to the first connecting column 5012, and the second connecting arm 5015 is rotatably connected to the first connecting arm 5014, and the second connecting arm 5015 is installed on the base 101, and the flexible pressure legs 5013 are rotatably connected to the first connecting arm 5014. The flexible member 5018 is arranged between the first connecting arm 5014 and the second connecting arm 5015, so that the first connecting arm 5014 has space to rotate relative to the base 101, and at the same time ensures that the first connecting arm 5014 can provide sufficient pressing force to the first connecting column 5012 and the flexible pressure leg 5013, and then realize flexible support of the emission fixing assembly 502 through the flexible pressure leg 5013 and the flexible member 5018, so that the emission fixing assembly 502 can stably press the acoustic emission monitoring device 21 on the end face of the rock sample 19, and the flexible deformation assembly 501 can deform with the rock during the test, so that the acoustic emission monitoring device 21 can make corresponding changes and adjustments according to the damage of the rock sample 19, ensuring that the acoustic emission monitoring device 21 is in real time close to the end face of the rock sample 19 without restricting the free deformation of the rock sample 19.

[0119] like Figures 11 to 14 As shown, in a feasible embodiment, the launch fixing assembly 502 includes: a triangular sleeve 5021, a second connecting column 5022, four extension rods 5023 and four fixing hoops 5024; the triangular sleeve 5021 is locked and connected with the triangular buckle 5011, and the triangular sleeve 5021 and the triangular buckle 5011 are coaxially arranged; the second connecting column 5022 is connected to the triangular sleeve 5021, and the second connecting column 5022 and the triangular sleeve 5021 are coaxially arranged; the four extension rods 5023 are evenly arranged along the circumference of the second connecting column 5022, and the first end of the extension rod 5023 is connected to the second connecting column 5022. It is connected to the side wall of the second connecting column 5022; the fixing hoop 5024 is arranged on the second end of the extension rod 5023, and a fixing groove is provided on the fixing hoop 5024, which is used to install the acoustic emission monitoring device 21; the acoustic emission monitoring device 21 protrudes from the fixing groove so that the acoustic emission monitoring device 21 can fit the end face of the rock sample 19; wherein, after the triangular sleeve 5021 is locked and connected with the triangular buckle 5011, the fixing hoop 5024 can abut against the second end of the flexible pressure leg 5013, and the fixing hoop 5024 corresponds to the flexible pressure leg 5013 one by one.

[0120] In this technical solution, the fixing hoop 5024 is used to install the acoustic emission monitoring device 21. The fixing hoop 5024 is connected to the second connecting column 5022 through the extension rod 5023. The second connecting column 5022, the triangular sleeve 5021, the triangular buckle 5011 and the first connecting column 5012 are coaxially arranged, so that the flexible pressure leg 5013 can be rotated relative to the second connecting column 5022 by rotating the first connecting column 5012, so that the flexible pressure leg 5013 can be pressed on the corresponding fixing hoop 5024, so that the acoustic emission monitoring device 21 is pressed against the end face of the rock sample 19 through the flexible pressure leg 5013, thereby realizing flexible support of the acoustic emission monitoring device 21 on the end face of the rock sample 19.

[0121] Furthermore, the flexible pressure leg 5013 is made of a thin metal sheet that is easily elastically deformed when subjected to force and returns to its original shape when not subjected to force. When assembling and installing the acoustic emission flexible fixing component 5, the position of the flexible pressure leg 5013 is adjusted so that the flexible pressure leg 5013 is pressed against the fixing hoop 5024, so that the acoustic emission monitoring device 21 in the fixing hoop 5024 is pressed against the end face of the rock sample 19.

[0122] Further, such as Figure 15 The fixing hoop 5024 is a hollow cavity with an opening at one end. A through slot 17 is provided on the side wall of the fixing hoop 5024. The acoustic emission monitoring device 21 is placed into the fixing hoop 5024 through the through slot 17. The thickness of the acoustic emission monitoring device 21 is greater than the height of the fixing hoop 5024 so that the end face of the acoustic emission monitoring device 21 can directly contact the rock sample 19.

[0123] Further, such as Figure 11 The triangular sleeve 5021 has a triangular cross-section and is a hollow cavity with an opening at one end. An assembly slot 18 is provided on the side of the triangular sleeve 5021. The assembly slot 18 is located at the bottom corner of the end of the triangular sleeve 5021 near the second connecting column 5022, and the assembly slot 18 should not be too large. The triangular buckle 5011 has a triangular cross-section similar to that of the triangular sleeve 5021. When assembling the flexible deformation component 501 and the emission fixing component 502, the triangular buckle 5011 is placed into the triangular sleeve 5021 accordingly. The triangular buckle 5011 is rotated so that the three corners of the triangular buckle 5011 respectively enter the three assembly slots 18 of the triangular sleeve 5021. The triangular buckle 5011 is locked and connected to the triangular sleeve 5021, thereby completing the assembly of the acoustic emission flexible fixing component 5.

[0124] Further, such as Figure 12After the acoustic emission flexible fixing component 5 is installed on the base 101, the height of the first rotating shaft 5016 is higher than the first connecting column 5012, the second rotating shaft 5017 is fixed in the positioning groove 15 of the base 101, and the flexible component 5018 is located below the first connecting arm 5014 and the second connecting arm 5015, and the flexible component 5018 is horizontal, which can not only adjust the supporting force of the acoustic emission flexible fixing component 5 on the acoustic emission monitoring device 21, but also prevent the acoustic emission flexible fixing component 5 from sliding down due to gravity, thereby preventing the acoustic emission monitoring device 21 from sliding down and ensuring the stability of the monitoring position of the acoustic emission monitoring device 21.

[0125] In some examples, the length of the extension rod 5023 can be selected to be different lengths to accommodate rock samples 19 of different diameters. Specifically, the sum of the length of the extension rod 5023 and the diameter of the fixing hoop 5024 is smaller than the diameter of the rock sample 19 .

[0126] like Figure 16 As shown, according to the second aspect of the present application, a Brazilian split test method with full-process dynamic measurement is proposed, and the Brazilian split test device with full-process dynamic measurement as described in any of the above technical solutions is used for detection. The detection method includes:

[0127] Step 100: Prepare a rock sample 19 and install the rock sample 19 into a clamping cavity, ensuring that the rock sample 19 is securely installed.

[0128] Step 200: Install the displacement sensor 4 to monitor the horizontal and vertical deformation of the rock sample 19;

[0129] Step 300: Assemble the acoustic emission flexible fixing assembly 5, install one end of the acoustic emission flexible fixing assembly 5 on the support assembly 1, make the other end of the acoustic emission flexible fixing assembly 5 fit the end surface of the rock sample 19, and install the acoustic emission monitoring device 21 on the acoustic emission flexible fixing assembly 5; by assembling the acoustic emission flexible fixing assembly 5, press the acoustic emission monitoring device 21 against the end surface of the rock sample 19, and flexibly support the acoustic emission monitoring device 21 to prevent the acoustic emission monitoring device 21 from being rigidly installed and interfering with the free deformation of the rock sample 19;

[0130] Step 400: Debugging the displacement sensor 4 and the acoustic emission monitoring device 21, returning the displacement sensor 4 and the acoustic emission monitoring device 21 to zero; adjusting the displacement sensor 4 and the acoustic emission monitoring device 21 to initial values;

[0131] Step 500: Apply a downward load to the upper fixture 3 to start the Brazilian splitting test of the rock. Apply pressure to the rock sample 19 through the upper fixture 3 to generate cracks on the end surface of the rock sample 19, thereby completing the Brazilian splitting test.

[0132] Step 600 : Record the data when the rock sample 19 is destroyed, and record the real-time monitoring data of the displacement sensor 4 and the acoustic emission monitoring device 21 to obtain the tensile strength of the rock sample 19 .

[0133] According to the Brazilian splitting test method with full-process dynamic measurement provided by the embodiment of the present application, before fracturing the rock sample 19, a displacement sensor 4 is first installed, and the displacement sensor assembly is used to monitor the deformation of the rock sample 19 during the compression process of the rock sample 19; at the same time, the acoustic emission monitoring device 21 is flexibly installed, and the acoustic emission monitoring device 21 is flexibly supported by the acoustic emission flexible fixing assembly 5, and the acoustic emission monitoring device 21 is placed against the end face of the rock sample 19. The acoustic emission flexible fixing assembly 5 can make real-time changes and adjustments according to the damage of the rock sample 19, will not constrain the free deformation of the rock sample 19 during the test, and measures the damage of the rock sample 19 in real time, thereby improving the accuracy of the Brazilian splitting test data, realizing flexible and dynamic measurement of the full-process test, and improving the integrity of the test data.

[0134] It can be understood that the Brazilian splitting test method with full-process dynamic measurement provided in the embodiment of the present application is applied to the Brazilian splitting test device with full-process dynamic measurement such as any of the above-mentioned technical solutions. Therefore, the Brazilian splitting test method with full-process dynamic measurement has all the beneficial effects of the Brazilian splitting test device with full-process dynamic measurement of the above-mentioned technical solutions.

[0135] Furthermore, before installing the rock sample 19, rock samples 19 of corresponding dimensions were fabricated according to the test design requirements, and two rock samples 19 were placed in the two clamping cavities. It should be noted that the rock sample 19 is made from on-site rock, and both conventional and small-sized sample tests can be conducted. For example, a disc-shaped rock sample 19 can have a diameter of 10 mm to 50 mm.

[0136] Furthermore, before installing the displacement sensor 4, first assemble the lateral displacement sensor 4 and the arc-shaped contact piece 8 so that the arc-shaped contact piece 8 fits against both sides of the rock sample 19, and then install the vertical displacement sensor 41 on the outside of the lower clamp 2 so that the contact section 403 of the vertical displacement sensor 41 rests against the lower surface of the mounting plate 20 protruding from the outside of the upper clamp 3.

[0137] It is easy for those skilled in the art to understand that the above embodiments can be freely combined and superimposed without conflict.

[0138] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A Brazilian splitting test device with full-process dynamic measurement, characterized in that: The Brazilian splitting test device for dynamic measurement of the entire process includes: Support components; a lower clamp, the lower clamp being arranged on the supporting assembly; an upper clamp, the upper clamp being arranged above the lower clamp, the upper clamp being slidably connected to the support assembly, the upper clamp and the lower clamp enclosing a clamping cavity to clamp the rock sample; A displacement sensor assembly, wherein the displacement sensor assembly includes a plurality of displacement sensors, the displacement sensors are arranged outside the rock sample, and the displacement sensors are used to detect the deformation of the rock sample; an acoustic emission flexible fixing assembly, wherein an acoustic emission monitoring device is installed in the acoustic emission flexible fixing assembly, a first end of the acoustic emission flexible fixing assembly is disposed on the supporting assembly, and a second end of the acoustic emission flexible fixing assembly presses the acoustic emission monitoring device against the end surface of the rock sample to flexibly support the acoustic emission monitoring device; The displacement sensor comprises a horizontal displacement sensor, which is arranged horizontally, with a first end of the horizontal displacement sensor being disposed on the support assembly and a second end of the horizontal displacement sensor being in contact with a side wall of the rock sample; The acoustic emission flexible fixing assembly includes: A flexible deformable component, the flexible deformable component comprising a flexible member, a first end of the flexible deformable component being embedded in the support component, and a second end of the flexible deformable component being connected to the first end of the flexible deformable component via the flexible member; an emission fixing assembly, wherein a first end of the emission fixing assembly is detachably connected to a second end of the flexible deformation assembly, the acoustic emission monitoring device is mounted on the second end of the emission fixing assembly, and the flexible deformation assembly presses the acoustic emission monitoring device against the end surface of the rock sample; The flexible deformation component also includes: A triangular buckle, the triangular buckle being detachably connected to the launch fixing assembly; a first connecting post, the first connecting post being coaxially arranged with the triangular buckle, the first end of the first connecting post being embedded in the triangular buckle, and the first connecting post being rotatably connected to the triangular buckle; Four flexible pressure legs, each of which is elastic and evenly arranged along the circumference of the first connecting column, with a first end of each flexible pressure leg disposed on a side wall of the first connecting column and a second end of each flexible pressure leg abutting against the launch fixing assembly; a first connecting arm, wherein a first end of the first connecting arm is connected to the second end of the first connecting post, and the first connecting arm and the first connecting post are arranged at an angle; a second connecting arm, wherein a first end of the second connecting arm is rotatably connected to a second end of the first connecting arm via a first rotating shaft; The first end of the flexible member is connected to the first connecting arm, and the second end of the flexible member is connected to the second connecting arm, so as to flexibly connect the first connecting arm and the second connecting arm.

2. The Brazilian splitting test device with full-process dynamic measurement according to claim 1 is characterized in that: The rock sample is cylindrical and is placed horizontally on the lower fixture, with the axis of the rock sample extending along the width direction of the lower fixture; The Brazilian splitting test device for dynamic measurement of the entire process also includes: a first arc-shaped groove, the first arc-shaped groove being provided on the top surface of the lower clamp and extending through the lower clamp in a width direction thereof; a second arc-shaped groove, the second arc-shaped groove being provided on the bottom surface of the upper clamp along the width direction of the upper clamp, the second arc-shaped groove and the first arc-shaped groove enclosing the clamping cavity; The curvature radius of the first arc-shaped groove is greater than the maximum curvature radius of the rock sample, and the curvature radius of the second arc-shaped groove is greater than the maximum curvature radius of the rock sample.

3. The Brazilian splitting test device with full-process dynamic measurement according to claim 1 is characterized in that: The support assembly comprises: A base, the base is horizontally arranged, and the two lower clamps are installed on the base; a positioning groove is opened on the top surface of the base, and the first end of the acoustic emission flexible fixing component is embedded in the positioning groove; Two side panels are vertically arranged on the base, and two upper clamps are arranged between the two side panels, and the upper clamps correspond to the lower clamps one by one; the upper clamps are slidably connected to the side panels, and the upper clamps slide along the height direction of the side panels.

4. The Brazilian splitting test device with full-process dynamic measurement according to claim 1 is characterized in that: The displacement sensor further includes: a vertical displacement sensor, the vertical displacement sensor being arranged vertically, a first end of the vertical displacement sensor being disposed on the support assembly, and a second end of the vertical displacement sensor being in contact with the upper fixture; Wherein, the vertical displacement sensors are symmetrically arranged at both ends of the lower fixture, and the horizontal displacement sensors are symmetrically arranged at both sides of the rock sample.

5. The Brazilian splitting test device with full-process dynamic measurement according to claim 4 is characterized in that: The Brazilian splitting test device for dynamic measurement of the entire process also includes: an arc-shaped contact member, the arc-shaped contact member being disposed at the second end of the horizontal displacement sensor, the arc-shaped contact member being provided with a third arc-shaped groove, at least a portion of the rock sample being embedded in the third arc-shaped groove, and a side surface of the arc-shaped contact member close to the rock sample being in contact with a sidewall of the rock sample; The arc-shaped contact piece is elastic and elastically deforms when contacting the rock sample.

6. The Brazilian splitting test device with full-process dynamic measurement according to claim 1, characterized in that: The displacement sensor comprises: a mounting section, a first end of which is fixedly connected to the support assembly; a connecting segment, wherein a first end of the connecting segment is embedded in the second end of the mounting segment, and the connecting segment is rotatably connected to the mounting segment; a contact segment, wherein a first end of the contact segment is embedded in the second end of the connecting segment, and the contact segment is fixedly connected to the connecting segment; The second end of the contact section abuts against the rock sample, Alternatively, the second end of the contact segment abuts against the upper clamp; The length of the installation section is greater than the sum of the lengths of the connecting section and the installation section.

7. The Brazilian splitting test device with full-process dynamic measurement according to claim 1 is characterized in that: The rock sample comprises two end faces, and one of the acoustic emission flexible fixing components is provided on each end face of the rock sample.

8. The Brazilian splitting test device with full-process dynamic measurement according to claim 7, characterized in that: The launch fixing assembly includes: A triangular sleeve, the triangular sleeve is locked and connected with the triangular buckle, and the triangular sleeve and the triangular buckle are coaxially arranged; A second connecting post, the second connecting post is connected to the triangular sleeve, and the second connecting post and the triangular sleeve are coaxially arranged; Four extension rods, the four extension rods being evenly arranged along the circumference of the second connecting column, and the first ends of the extension rods being connected to the side walls of the second connecting column; Four fixing hoops, each of which is provided on the second end of the extension rod and has a fixing groove for mounting the acoustic emission monitoring device; The acoustic emission monitoring device protrudes from the fixing groove so that the acoustic emission monitoring device fits the end surface of the rock sample; Wherein, after the triangular sleeve is locked and connected with the triangular buckle, the fixing hoop abuts against the second end of the flexible pressure leg, and the fixing hoop corresponds to the flexible pressure leg one by one.

9. A Brazilian splitting test method with full-process dynamic measurement, characterized in that: The Brazilian splitting test device for full-process dynamic measurement according to any one of claims 1 to 8 is used for measurement, and the method comprises: preparing a rock sample, and installing the rock sample into a clamping cavity; Install the displacement sensor; Assembling an acoustic emission flexible fixing assembly, installing one end of the acoustic emission flexible fixing assembly on a supporting assembly, making the other end of the acoustic emission flexible fixing assembly fit the end surface of the rock sample, and installing an acoustic emission monitoring device on the acoustic emission flexible fixing assembly; Debugging the displacement sensor and the acoustic emission monitoring device, and returning the displacement sensor and the acoustic emission monitoring device to zero; Apply downward load to the upper fixture and start the Brazilian splitting test of rock; The data when the rock sample is destroyed is recorded.

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