Rock mechanical parameter evaluation method and device based on penetration test and control equipment

Abstract

The invention relates to the technical field of rock mechanical testing, in particular to a rock mechanical parameter evaluation method and device based on a penetration test and control equipment, and the method comprises the steps that rock mechanical parameters of a rock test piece and test data of the penetration test are obtained; generating a pressure and displacement curve of the rock test piece in the penetration test process according to the test data; on the basis of a plurality of characterization indexes calculated by the pressure and displacement curve, constructing an evaluation model according to the rock mechanical parameters of the rock test piece and the plurality of characterization indexes; and evaluating the rock mechanical parameters of the to-be-evaluated rock after the penetration test by using the evaluation model. Therefore, the problems of complicated preparation process, time consumption, high cost and the like due to the fact that standardized rock test pieces are generally required to be prepared in the related technology are solved.

Description

Technical Field

[0001] This application relates to the technical field of rock mechanics testing, and particularly relates to a method, device, and control equipment for evaluating rock mechanics parameters based on penetration tests. Background Art

[0002] The acquisition of rock mechanics parameters is an important basic task in fields such as geotechnical engineering, mining engineering, and geological engineering. Rock mechanics parameter testing methods in related technologies (such as uniaxial compression tests, triaxial compression tests, Brazilian splitting tests, etc.) usually require the preparation of standardized rock specimens, and the specimen preparation process is complex, time-consuming, and costly. In addition, for some special geological conditions (such as soft rock masses, fractured rock masses, etc.), it is difficult to prepare standard specimens, or even impossible to achieve. Summary of the Invention

[0003] This application provides a method, device, and control equipment for evaluating rock mechanics parameters based on penetration tests to solve the problems in related technologies that usually require the preparation of standardized rock specimens, with complex, time-consuming, and costly preparation processes.

[0004] In the first aspect of the embodiments of this application, a method for evaluating rock mechanics parameters based on penetration tests is provided, including the following steps: obtaining the rock mechanics parameters of a rock specimen and the test data of the penetration test; generating a pressure-displacement curve of the rock specimen during the penetration test according to the test data; calculating multiple characterization indexes of the penetration test based on the pressure-displacement curve, and constructing an evaluation model according to the rock mechanics parameters of the rock specimen and the multiple characterization indexes; and evaluating the rock mechanics parameters of the rock to be evaluated after the penetration test using the evaluation model.

[0005] Optionally, the process of the penetration test includes: preparing a rock specimen; placing the flat surface of the rock specimen on a base, adjusting a pressurization system through a control device, and raising and lowering a pressure head through the pressurization system to make the pressure head contact the surface of the rock specimen; continuously applying pressure to the rock specimen at a target loading rate, and collecting pressure and displacement data until the rock specimen is damaged.

[0006] Optionally, calculating multiple characterization indexes of the penetration test based on the pressure-displacement curve includes: extracting the rising section, falling section, and peak force in the pressure-displacement curve; and calculating multiple characterization indexes of the penetration test according to at least one of the rising section, falling section, and peak force.

[0007] Optionally, the multiple characterization indexes include multiple ones of critical transition force, penetration modulus, penetration hardness index, rock brittleness index, peak load index, pressure fluctuation index, and displacement fluctuation index. Among them, the critical transition force is the load at which the rock loses its linear behavior, the penetration modulus is the slope of the nearly linearly rising section in the pressure-displacement curve, the penetration hardness index is the ratio of the first peak force to the corresponding displacement in the pressure-displacement curve, the rock brittleness index is the ratio of the maximum peak force to the corresponding displacement during the entire penetration test process, the peak load index is the average value of the ratios of all peak forces to the corresponding displacements during the entire penetration test process, the pressure fluctuation index is the ratio of the sum of the pressures in the descending section to the sum of the pressures in the ascending section in the pressure-displacement curve, and the displacement fluctuation index is the ratio of the average displacement in the descending section to the average displacement in the ascending section in the pressure-displacement curve.

[0008] Optionally, the evaluation model includes the corresponding relationships between the rock mechanical parameters and the multiple characterization indexes.

[0009] Optionally, the rock mechanical parameters include uniaxial compressive strength, tensile strength, and brittleness.

[0010] An embodiment of the second aspect of the present application provides a device for evaluating rock mechanical parameters based on a penetration test, including: an acquisition module for acquiring the rock mechanical parameters of a rock specimen and the test data of the penetration test; a generation module for generating a pressure-displacement curve of the rock specimen during the penetration test according to the test data; a processing module for calculating multiple characterization indexes of the penetration test based on the pressure-displacement curve and constructing an evaluation model according to the rock mechanical parameters of the rock specimen and the multiple characterization indexes; and an evaluation module for evaluating the rock mechanical parameters of the rock to be evaluated after the penetration test by using the evaluation model.

[0011] Optionally, the process of the penetration test includes: preparing a rock specimen; placing the flat surface of the rock specimen on the base, adjusting the pressurization system through a control device, and raising and lowering the indenter through the pressurization system so that the indenter contacts the surface of the rock specimen; continuously applying pressure to the rock specimen at a target loading rate, and collecting pressure and displacement data until the rock specimen is damaged.

[0012] Optionally, the processing module is further configured to extract the ascending section, descending section, and peak force in the pressure-displacement curve; and calculate multiple characterization indexes of the penetration test according to at least one of the ascending section, descending section, and peak force.

[0013] Optionally, multiple characterization indices include multiple ones of critical transition force, penetration modulus, penetration hardness index, rock brittleness index, peak load index, pressure fluctuation index, and displacement fluctuation index. Among them, the critical transition force is the load at which the rock loses its linear behavior, the penetration modulus is the slope of the nearly linear ascending section in the pressure-displacement curve, the penetration hardness index is the ratio of the first peak force to the corresponding displacement in the pressure-displacement curve, the rock brittleness index is the ratio of the maximum peak force to the corresponding displacement during the entire penetration test, the peak load index is the average value of the ratios of all peak forces to the corresponding displacements during the entire penetration test, the pressure fluctuation index is the ratio of the sum of the pressures in the descending section to the sum of the pressures in the ascending section in the pressure-displacement curve, and the displacement fluctuation index is the ratio of the average displacement in the descending section to the average displacement in the ascending section in the pressure-displacement curve.

[0014] Optionally, the evaluation model includes the correspondence between rock mechanical parameters and multiple characterization indices.

[0015] Optionally, the rock mechanical parameters include uniaxial compressive strength, tensile strength, and brittleness.

[0016] The third aspect embodiment of this application provides a control device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the program to implement the rock mechanical parameter evaluation method based on the penetration test as in the above embodiments.

[0017] The fourth aspect embodiment of this application provides a rock mechanical parameter evaluation system based on the penetration test, including: a base for placing the rock; a indenter and a pressurizing system for applying pressure to the indenter; a data acquisition system for acquiring pressure and displacement data during the penetration test; and the control device in the above embodiments for controlling the pressurizing system to apply pressure to the indenter to perform a penetration test on the rock and evaluating the rock mechanical parameters according to the pressure and displacement data.

[0018] The fifth aspect embodiment of this application provides a computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to be used to implement the rock mechanical parameter evaluation method based on the penetration test as in the above embodiments.

[0019] Thus, this application includes the following beneficial effects:

[0020] Embodiments of the present application directly obtain the mechanical parameters of irregular rock blocks through penetration tests, avoiding the complex specimen preparation process, achieving rapid, low-cost, and high-precision testing of rock mechanical parameters. Moreover, the penetration test is easy to operate and has a short testing period. The present application also proposes a characterization index for the penetration test results and establishes a correlation between the penetration test results and rock mechanical parameters to quickly estimate or evaluate rock mechanical parameters, which is applicable to various types of rocks, including soft rock masses and fractured rock masses, etc. Thus, the problems in the related art, such as the need to prepare standardized rock specimens, which are complex, time-consuming, and costly in the preparation process, are solved.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0023] Figure 1 is a flowchart of a method for evaluating rock mechanical parameters based on a penetration test according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of a rock specimen for conducting a penetration test according to an embodiment of the present application;

[0025] Figure 3 is a penetration test pressure-displacement curve and index calculation method according to an embodiment of the present application;

[0026] Figure 4 is a block diagram of a device for evaluating rock mechanical parameters based on a penetration test according to an embodiment of the present application;

[0027] Figure 5 is a schematic structural diagram of a control device according to an embodiment of the present application.

[0028] Figure 6 is a structural diagram of a system for evaluating rock mechanical parameters based on a penetration test according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following describes in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application.

[0030] The following describes a method, apparatus, and control device for evaluating rock mechanical parameters based on a penetration test according to embodiments of the present application. In view of the problems mentioned in the above background art, the present application provides a method for evaluating rock mechanical parameters based on a penetration test. In this method, the mechanical parameters of irregular rock blocks are directly obtained through a penetration test, avoiding the complex specimen preparation process, achieving rapid, low-cost, and high-precision testing of rock mechanical parameters. Moreover, the penetration test is simple to operate and has a short test period. In addition, a characterization index for the penetration test results and a correlation between the penetration test results and rock mechanical parameters are proposed to quickly estimate or evaluate rock mechanical parameters, which is applicable to various types of rocks, including soft rock masses and fractured rock masses. Thus, the problems in the related art, such as the need to prepare standardized rock specimens, with complex, time-consuming, and costly preparation processes, are solved.

[0031] Specifically, Figure 1 FIG. is a schematic flow chart of a method for evaluating rock mechanical parameters based on a penetration test provided by an embodiment of the present application.

[0032] As Figure 1 shown, the method for evaluating rock mechanical parameters based on a penetration test includes the following steps:

[0033] In step S101, obtain the rock mechanical parameters of the rock specimen and the test data of the penetration test.

[0034] Among them, the rock mechanical parameters include uniaxial compressive strength, tensile strength, and brittleness.

[0035] In an embodiment of the present application, the process of the penetration test includes: preparing a rock specimen; placing the flat surface of the rock specimen on the base, adjusting the pressurization system through the control device, raising and lowering the indenter through the pressurization system so that the indenter contacts the surface of the rock specimen; continuously applying pressure to the rock specimen at a target loading rate, and collecting data of pressure and displacement until the rock specimen is damaged.

[0036] It can be understood that the penetration test is a rock mechanics test carried out under indoor conditions. An indenter with a certain shape and size invades the surface of the rock specimen under the action of pressurization, and the pressure and displacement during the invasion process are recorded in real time. The system includes an indenter, a pressurization system, a data acquisition system, a control device, and a metal frame. Among them, the indenter directly acts on the rock specimen, and its shape can be a cone, with sizes ranging from 4 cm to 10 cm. The tip of the cone is provided with a spherical chamfer, and the diameter of the sphere depends on the size of the rock specimen. The pressurization system is used to apply pressure to the indenter, the data acquisition system records the pressure and displacement during the loading process in time, the control device can set test parameters and display and store test results, and the metal frame connects the pressurization system and the indenter and provides a specimen installation position. The specific test process is as follows:

[0037] (1) Prepare rock specimens. As Figure 2 shown, select rock blocks. The length, width, and height of the rock blocks should satisfy length ≥ width ≥ height, and the height of the rock blocks is controlled within 25 mm to 100 mm. Cut one surface of the irregular rock block flat (if it is a regular rock block, no treatment is required), and this flat cut surface should be perpendicular to the loading direction. The water content state of the rock block can be selected as natural water content state, dried state, saturated state, or other water content states, without limitation. The number of rock blocks selected in each batch is not less than 10.

[0038] (2) Install the rock specimen. Place the flat surface of the rock specimen on the metal frame base, and adjust the pressure application system through the control device, and then raise and lower the pressure head so that the pressure head just touches the surface of the rock specimen.

[0039] (3) Conduct the penetration test. Continuously apply pressure to the rock specimen at a constant loading rate. The pressure and displacement during the whole process are recorded by the data acquisition system and stored in the control device. Generally, the loading process continues until the rock specimen fails.

[0040] In step S102, generate the pressure-displacement curve of the rock specimen during the penetration test according to the test data.

[0041] In step S103, calculate multiple characterization indexes of the penetration test based on the pressure-displacement curve, and construct an evaluation model according to the rock mechanical parameters of the rock specimen and the multiple characterization indexes.

[0042] It can be understood that the embodiments of the present application can draw the pressure-displacement curve of the rock specimen during the penetration test and calculate the penetration test indexes based on the curve. Considering that the existing characterization indexes are single and the information characterizing the penetration test is limited, the embodiments of the present application provide the following indexes to more comprehensively characterize the penetration test results:

[0043] Critical transition force CTF, that is, the load (kN) at which the rock loses its linear behavior;

[0044] Penetration modulus IM, that is, the slope (kN / mm) of the nearly straight rising section in the pressure-displacement curve;

[0045] Penetration hardness index IHI, that is, the ratio of the first peak force to its corresponding displacement in the pressure-displacement curve (kN / mm);

[0046] Rock brittleness index BI, the ratio of the maximum peak force to its corresponding displacement during the whole penetration test process (kN / mm);

[0047] Peak load index PLI, that is, the average value of the ratios of all peak forces to their corresponding displacements during the whole penetration test process (kN / mm);

[0048] The pressure fluctuation index FI, which is the ratio (dimensionless) of the sum of the pressures in the descending section to the sum of the pressures in the ascending section in the pressure-displacement curve;

[0049] The displacement fluctuation index PI, which is the ratio (dimensionless) of the average displacement in the descending section to the average displacement in the ascending section in the pressure-displacement curve.

[0050] During the actual execution process, as Figure 3 shown, the embodiments of the present application can extract the ascending section, descending section, and peak force in the pressure-displacement curve; and calculate multiple characterization indexes of the penetration test according to at least one of the ascending section, descending section, and peak force.

[0051] In step S104, the rock mechanical parameters of the rock to be evaluated after the penetration test are evaluated using the evaluation model.

[0052] Among them, the evaluation model includes the corresponding relationship between the rock mechanical parameters and multiple characterization indexes.

[0053] It can be understood that the embodiments of the present application establish an expression model or corresponding relationship between the penetration test indexes and the rock mechanical parameters (uniaxial compressive strength, tensile strength, brittleness) through a large number of penetration tests. As shown in Table 1, the corresponding relationship between the penetration indexes and the uniaxial compressive strength and tensile strength of the rock.

[0054] Table 1

[0055] Rock strength Penetration index Expression relationship Uniaxial compressive strength CTF UCS = 91.97 CTF IM UCS = 17.38 IM IHI UCS = 0.97 IHI + 28.28 BI <![CDATA[UCS = 3.73BI 1.043 <!-- 4 -->]]> FI UCS = 7.1 FI - 4.04 PI UCS = 5.8 PI - 2.78 Tensile strength IHI TS = 0.07 IHI + 3.79 BI <![CDATA[BI = 8.253tS 0.579 > FI TS = 0.98 FI - 3.14 PI TS = 1.1 PI - 1.86

[0056] Secondly, the embodiments of the present application can classify the rock brittleness according to the obtained penetration index PLI, and the classification basis is as follows:

[0057] When PLI≥40, the rock has ultra-high brittleness;

[0058] When 35≤PLI≤40, the rock has high brittleness;

[0059] When 25≤PLI<35, the rock has medium brittleness;

[0060] When 20≤PLI<25, the rock has low brittleness;

[0061] When PLI≤19, the rock has no brittleness.

[0062] The rock mechanics parameter evaluation method based on the penetration test proposed according to the embodiments of the present application directly obtains the mechanical parameters of irregular rock blocks through the penetration test, avoids the complex specimen preparation process, realizes rapid, low-cost, and high-precision rock mechanics parameter testing, and the penetration test is easy to operate and has a short test period. Moreover, the characterization indexes of the penetration test results are proposed and the correlation between the penetration test results and the rock mechanics parameters is established to quickly estimate or evaluate the rock mechanics parameters, which is applicable to various types of rocks, including soft rock masses and fractured rock masses, etc. Thus, the problems in the related art that standardized rock specimens usually need to be prepared, and the preparation process is complex, time-consuming, and costly are solved.

[0063] Next, the rock mechanics parameter evaluation device based on the penetration test proposed according to the embodiments of the present application is described with reference to the accompanying drawings.

[0064] Figure 4 It is a block diagram of the rock mechanics parameter evaluation device based on the penetration test according to the embodiments of the present application.

[0065] As Figure 4 shown, the rock mechanics parameter evaluation device 10 based on the penetration test includes: an acquisition module 100, a generation module 200, a processing module 300, and an evaluation module 400.

[0066] Among them, the acquisition module 100 is used to acquire the rock mechanics parameters of the rock specimen and the test data of the penetration test; the generation module 200 is used to generate the pressure-displacement curve of the rock specimen during the penetration test according to the test data; the processing module 300 is used to calculate multiple characterization indexes of the penetration test based on the pressure-displacement curve and construct an evaluation model according to the rock mechanics parameters of the rock specimen and the multiple characterization indexes; the evaluation module 400 is used to evaluate the rock mechanics parameters of the rock to be evaluated after the penetration test by using the evaluation model.

[0067] In an embodiment of the present application, the process of the penetration test includes: preparing a rock specimen; placing the flat surface of the rock specimen on the base, adjusting the pressurization system through the control device, and raising and lowering the indenter through the pressurization system so that the indenter contacts the surface of the rock specimen; continuously applying pressure to the rock specimen at a target loading rate, and collecting the data of pressure and displacement until the rock specimen is damaged.

[0068] In an embodiment of the present application, the processing module 300 is further used to extract the rising section, falling section, and peak force in the pressure-displacement curve; calculate multiple characterization indexes of the penetration test according to at least one of the rising section, falling section, and peak force.

[0069] In one embodiment of the present application, the multiple characterization indexes include multiple ones of critical transition force, penetration modulus, penetration hardness index, rock brittleness index, peak load index, pressure fluctuation index, and displacement fluctuation index. Among them, the critical transition force is the load at which the rock loses its linear behavior, the penetration modulus is the slope of the nearly linear rising section in the pressure-displacement curve, the penetration hardness index is the ratio of the first peak force to the corresponding displacement in the pressure-displacement curve, the rock brittleness index is the ratio of the maximum peak force to the corresponding displacement during the entire penetration test process, the peak load index is the average value of the ratios of all peak forces to the corresponding displacements during the entire penetration test process, the pressure fluctuation index is the ratio of the sum of the pressures in the descending section to the sum of the pressures in the ascending section in the pressure-displacement curve, and the displacement fluctuation index is the ratio of the average displacement in the descending section to the average displacement in the ascending section in the pressure-displacement curve.

[0070] In one embodiment of the present application, the evaluation model includes the corresponding relationship between the rock mechanical parameters and the multiple characterization indexes.

[0071] In one embodiment of the present application, the rock mechanical parameters include uniaxial compressive strength, tensile strength, and brittleness.

[0072] It should be noted that the foregoing explanation of the embodiment of the method for evaluating rock mechanical parameters based on the penetration test also applies to the device for evaluating rock mechanical parameters based on the penetration test of this embodiment, and will not be elaborated here.

[0073] The device for evaluating rock mechanical parameters based on the penetration test proposed according to the embodiments of the present application directly obtains the mechanical parameters of irregular rock blocks through the penetration test, avoids the complex specimen preparation process, realizes rapid, low-cost, and high-precision rock mechanical parameter testing, and the penetration test is easy to operate and has a short test period. In addition, the characterization indexes of the penetration test results are proposed and the correlation between the penetration test results and the rock mechanical parameters is established to quickly estimate or evaluate the rock mechanical parameters, which is applicable to various types of rocks, including soft rock masses and fractured rock masses, etc. Thus, the problems in the related art that standardized rock specimens usually need to be prepared, and the preparation process is complex, time-consuming, and costly are solved.

[0074] Figure 5 FIG. is a schematic structural diagram of the control device 4 provided in the embodiment of the present application. The control device 4 may include:

[0075] A memory 501, a processor 502, and a computer program stored on the memory 501 and executable on the processor 502.

[0076] When the processor 502 executes the program, it implements the method for evaluating rock mechanical parameters based on the penetration test provided in the above embodiment.

[0077] Further, the control device 4 further includes:

[0078] A communication interface 503 for communication between the memory 501 and the processor 502.

[0079] A memory 501 for storing a computer program that can run on the processor 502.

[0080] The memory 501 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0081] If the memory 501, the processor 502, and the communication interface 503 are implemented independently, the communication interface 503, the memory 501, and the processor 502 can be interconnected through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, Figure 5 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0082] Optionally, in a specific implementation, if the memory 501, the processor 502, and the communication interface 503 are integrated on a chip, the memory 501, the processor 502, and the communication interface 503 can communicate with each other through an internal interface.

[0083] The processor 502 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0084] In addition, an embodiment of the present application further provides a rock mechanics parameter evaluation system based on a penetration test.

[0085] As Figure 6 shown, it includes: a base for placing a rock, a indenter 1, a pressurizing system 2, a data acquisition system 3, and a control device 4.

[0086] Among them, the pressurization system 2 applies pressure to the indenter 1; the data acquisition system 3 acquires the pressure and displacement data during the penetration test; the control device 4 is used to control the pressurization system 2 to apply pressure to the indenter 1 to perform a penetration test on the rock and evaluate the rock mechanical parameters according to the pressure and displacement data. In addition, Figure 6 the 5 in it represents the metal frame, Figure 6 and the 6 in it represents the rock specimen.

[0087] Specifically, as Figure 6 shown, the penetration test is a rock mechanics test carried out under indoor conditions. The indenter 1 with a certain shape and size invades the surface of the rock specimen 6 under the action of pressurization, and the pressure and displacement during the invasion process are recorded in real time. The system includes an indenter 1, a pressurization system 2, a data acquisition system 3, a control device 4, and a metal frame 5. Among them, the indenter 1 acts directly on the rock specimen 6. Its shape can be a cone, and the size ranges from 4 cm to 10 cm. The tip of the cone uses a spherical chamfer, and the diameter of the sphere depends on the size of the rock specimen. The pressurization system 2 is used to apply pressure to the indenter. The data acquisition system 3 records the pressure and displacement during the loading process over time. The control device 4 can set test parameters and display and store test results. The metal frame 5 connects the pressurization system and the indenter and provides a specimen installation position.

[0088] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the above rock mechanics parameter evaluation method based on the penetration test is implemented.

[0089] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0090] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0091] Any process or method description depicted in the flowchart or otherwise described herein may be understood to represent a module, segment, or portion of code including one or N executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where functions may be performed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0092] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, the steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays, field-programmable gate arrays, etc.

[0093] Those of ordinary skill in the art of the present technology can understand that all or part of the steps carried by the method for implementing the above embodiments can be completed by instructing relevant hardware through a program. The above program can be stored in a computer-readable storage medium, and when the program is executed, it includes one or a combination of the steps of the method embodiments.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for evaluating rock mechanical parameters based on penetration tests, characterized in that, Including the following steps: Obtain the rock mechanical parameters of the rock specimen and the test data of the penetration test; Generate a pressure-displacement curve of the rock specimen during the penetration test according to the test data; Calculate multiple characterization indexes of the penetration test based on the pressure-displacement curve, and construct an evaluation model according to the rock mechanical parameters of the rock specimen and the multiple characterization indexes; Use the evaluation model to evaluate the rock mechanical parameters of the rock to be evaluated after the penetration test.

2. The method for evaluating rock mechanical parameters based on the penetration test according to claim 1, wherein The process of the penetration test includes: Prepare a rock specimen; Place the flat surface of the rock specimen on the base, adjust the pressurizing system through the control device, and raise and lower the indenter through the pressurizing system so that the indenter contacts the surface of the rock specimen; Continuously apply pressure to the rock specimen at a target loading rate, and collect data of pressure and displacement until the rock specimen is damaged.

3. The method for evaluating rock mechanical parameters based on the penetration test according to claim 1, characterized in that The calculating multiple characterization indexes of the penetration test based on the pressure-displacement curve includes: Extract the rising section, falling section and peak force in the pressure-displacement curve; Calculate multiple characterization indexes of the penetration test according to at least one of the rising section, falling section and peak force.

4. The method for evaluating rock mechanical parameters based on penetration test according to claim 1 or 3, characterized in that, The multiple characterization indexes include multiple ones of critical transition force, penetration modulus, penetration hardness index, rock brittleness index, peak load index, pressure fluctuation index and displacement fluctuation index. Among them, the critical transition force is the load at which the rock loses its linear behavior, the penetration modulus is the slope of the nearly linear rising section in the pressure-displacement curve, the penetration hardness index is the ratio of the first peak force to the corresponding displacement in the pressure-displacement curve, the rock brittleness index is the ratio of the maximum peak force to the corresponding displacement during the entire penetration test process, the peak load index is the average value of the ratios of all peak forces to the corresponding displacements during the entire penetration test process, the pressure fluctuation index is the ratio of the sum of the pressures in the falling section to the sum of the pressures in the rising section in the pressure-displacement curve, and the displacement fluctuation index is the ratio of the average displacement in the falling section to the average displacement in the rising section in the pressure-displacement curve.

5. The method for evaluating rock mechanical parameters based on the penetration test according to claim 1, characterized in that, The evaluation model includes the corresponding relationship between the rock mechanical parameters and the multiple characterization indexes.

6. The method for evaluating rock mechanical parameters based on the penetration test according to claim 1 or 5, characterized in that The rock mechanical parameters include uniaxial compressive strength, tensile strength and brittleness.

7. A device for evaluating rock mechanical parameters based on penetration tests, characterized in that, Including: An acquisition module for obtaining the rock mechanical parameters of the rock specimen and the test data of the penetration test; A generation module for generating a pressure-displacement curve of the rock specimen during the penetration test according to the test data; A processing module for calculating multiple characterization indexes of the penetration test based on the pressure-displacement curve and constructing an evaluation model according to the rock mechanical parameters of the rock specimen and the multiple characterization indexes; An evaluation module for using the evaluation model to evaluate the rock mechanical parameters of the rock to be evaluated after the penetration test.

8. A control device, characterized in that, Including: A memory, a processor and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the method for evaluating rock mechanical parameters based on penetration test according to any one of claims 1-6.

9. A rock mechanics parameter evaluation system based on penetration tests, characterized in that, Including: A base for placing the rock; An indenter and a pressurizing system for applying pressure to the indenter; A data acquisition system that acquires pressure and displacement data during the penetration test; The control device according to claim 8, which is used to control the pressurization system to apply pressure to the indenter to perform a penetration test on the rock, and evaluate the rock mechanical parameters according to the pressure and displacement data.

10. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instruction is executed, it realizes the method for evaluating rock mechanical parameters based on the penetration test according to any one of claims 1-6.

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