Device and method for measuring and predicting thermal expansion force and deformation of high-temperature rock in real time

Abstract

The invention relates to the technical field of rock mechanics, in particular to a real-time measurement and prediction device and method for thermal expansion force and deformation of high-temperature rock. The real-time measurement and prediction device comprises a base, a computer control system and a prediction machine. The high-temperature-resistant resistance stress ring, the differential axial extensometer and the differential circumferential extensometer upload measured data to the resistance-type strain tester in real time, the resistance-type strain tester synchronously transmits the received data to the computer control system, and the computer control system transmits the collected data to the prediction machine. The prediction machine extracts predictive characteristics in various data, a prediction result is output to the computer control system through the prediction model, the computer control system calculates the thermal expansion force and deformation of the rock in real time based on the prediction result, by adopting the structure, the thermal expansion force and deformation of the rock can be automatically, synchronously and accurately measured in real time in a real high-temperature environment, and the rock thermal expansion force and deformation measurement accuracy is improved. And large difference between a measurement result and an actual working condition is avoided.

Description

Technical Field

[0001] This invention relates to the field of gear processing and transfer device technology, and in particular to a real-time measurement and prediction device and method for thermal expansion force and deformation of high-temperature rocks. Background Technology

[0002] With the development of human society and the advancement of science and technology, deep underground engineering has gradually become an important development direction in many fields. However, in deep underground engineering projects such as high-level radioactive waste disposal sites, deep geothermal development, and high-temperature tunnels, the rocks are subjected to high ground stress and high ground temperature environments for extended periods. Their thermal expansion force has a decisive impact on the stability of the surrounding rock and the safety of the engineering structure. For example, the heat generated by the decay of nuclear waste will cause the temperature of the rocks surrounding the disposal site to rise continuously, inducing thermal expansion deformation and generating stress. If the stress exceeds the rock strength or the bearing capacity of the supporting structure, it will lead to cracking of the surrounding rock, structural failure, and threaten the safety of the project.

[0003] Currently, traditional experimental methods for measuring the thermal expansion force and deformation of high-temperature rocks have significant limitations. On the one hand, most experimental equipment struggles to simulate real-world high-temperature environments (typically, underground engineering temperatures can reach 100°C or even higher), and cannot achieve real-time, precise temperature control and dynamic changes, leading to significant discrepancies between measurement results and actual working conditions. On the other hand, existing measuring devices often only independently acquire data on rock thermal expansion deformation or thermal stress, lacking the ability to perform real-time, synchronous, and precise measurement of thermal expansion force under high-temperature conditions. Furthermore, traditional equipment has a low degree of automation, relies on manual operation, and collects data discretely, making it difficult to continuously acquire and rapidly analyze data during the experiment, thus failing to effectively support in-depth research on the thermal expansion force characteristics of rocks under complex working conditions. To address these issues, this invention studies a real-time measurement and prediction device and method for the thermal expansion force and deformation of high-temperature rocks under real-time high-temperature conditions, aiming for continuous and high-precision measurement. Summary of the Invention

[0004] The purpose of this invention is to provide a real-time measurement and prediction device and method for thermal expansion force and deformation of high-temperature rocks, which solves the problem that existing traditional test methods for measuring thermal expansion force and deformation of high-temperature rocks are difficult to measure the thermal expansion force and deformation of rocks in real-time, synchronously and accurately under real high-temperature environments, and have low automation, resulting in a large difference between the measurement results and the actual working conditions.

[0005] To achieve the above objectives, the present invention provides a real-time measurement and prediction device for the thermal expansion force and deformation of high-temperature rocks. This device includes a base, a high-temperature environment chamber, a temperature controller, a sample fixing assembly, a resistance strain gauge, a computer control system, a high-temperature resistance stress ring, a differential axial extensometer, a differential circumferential extensometer, and a prediction machine. The sample fixing assembly is located at the center of the upper surface of the base, and is used to fix the rock sample. The high-temperature environment chamber is also located on the upper surface of the base. The barrel is located outside the sample fixing assembly. The high-temperature environment barrel is equipped with a built-in heating tube and a temperature sensor. The high-temperature environment barrel and the base are equipped with a heat insulation layer. The top of the heat insulation layer is equipped with a high-temperature resistant resistance stress ring. The bottom of the high-temperature resistant resistance stress ring is in contact with the top of the sample fixing assembly. The high-temperature environment barrel is also equipped with a differential axial extensometer and a differential circumferential extensometer. The differential axial extensometer is used to measure the axial deformation of the rock sample, and the differential circumferential extensometer is used to measure the circumferential deformation of the rock sample.

[0006] The high-temperature resistant resistance stress ring is connected to the resistance strain gauge via data transmission line 1. The resistance strain gauge is connected to the computer control system via data transmission line 2. The differential axial extensometer is connected to the resistance strain gauge via data transmission line 3. The differential circumferential extensometer is connected to the resistance strain gauge via data transmission line 4. The information output terminal of the computer control system is connected to the information input terminal of the predictor via data transmission line 5. The information output terminal of the predictor is connected to the information input terminal of the computer control system via data transmission line 6.

[0007] The temperature sensor is electrically connected to the temperature controller via a high-temperature shielded wire;

[0008] The built-in heating element is electrically connected to the temperature controller via a heating element wire.

[0009] The sample fixing assembly includes a lower pad and an upper pad. The lower pad is placed at the center of the upper surface of the base, and the upper pad is placed above the lower pad. The rock sample is placed between the upper pad and the lower pad.

[0010] Both the lower pad and the upper pad are made of heat-insulating material.

[0011] The thermal insulation layer is provided with support frames on both sides. The two support frames are used to support the ends of the differential axial extensometer and the differential circumferential extensometer that extend to the outside of the thermal insulation layer.

[0012] The differential axial extensometer and the differential circumferential extensometer are both equipped with cooling water jackets.

[0013] The high-temperature environment tank has lifting beams on both sides of its top.

[0014] The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rocks also includes a leakage current protection switch, which is connected to the temperature controller.

[0015] This invention also provides a real-time measurement and prediction method for the thermal expansion force and deformation of high-temperature rocks, applied to a real-time measurement and prediction device for the thermal expansion force and deformation of high-temperature rocks as described above, comprising the following steps:

[0016] After the rock sample is fixed by the cooperation of the lower pad and the upper pad, the high-temperature resistant stress ring, the differential axial extensometer, and the differential circumferential extensometer are passed through the reserved holes in the high-temperature environment barrel to complete the installation of the high-temperature resistant stress ring, the differential axial extensometer, and the differential circumferential extensometer. The contact ends of the high-temperature resistant stress ring and the differential axial extensometer are in contact with the top of the upper pad, so that the differential circumferential extensometer is in contact with the rock sample.

[0017] The start-up temperature, target temperature, and heating rate of the temperature sensor are set, and during the heating process, the high-temperature resistant resistance stress ring, the differential axial extensometer, and the differential circumferential extensometer upload the measured data to the resistance strain tester in real time.

[0018] The resistance strain gauge synchronously transmits the received data to the computer control system, which in turn transmits the collected data to the predictive machine. The predictive machine extracts predictive features from the data and outputs prediction results to the computer control system via a prediction model. Based on the prediction results, the computer control system calculates the thermal expansion force and deformation of the rock in real time.

[0019] This invention discloses a real-time measurement and prediction device and method for thermal expansion force and deformation of high-temperature rocks, comprising a base, a high-temperature environment chamber, a temperature controller, a sample fixing assembly, a resistance strain gauge, a computer control system, a high-temperature resistant resistance stress ring, a differential axial extensometer, a differential circumferential extensometer, and a prediction machine. After fixing the rock sample using the sample fixing assembly, the high-temperature resistant resistance stress ring, the differential axial extensometer, and the differential circumferential extensometer are passed through pre-drilled holes in the high-temperature environment chamber to complete the installation of these components. The starting temperature, target temperature, and heating rate of the temperature sensor are set, and the measurement is performed during the heating process. The high-temperature resistant stress ring, the differential axial extensometer, and the differential circumferential extensometer upload the measured data to the resistance strain gauge in real time. The resistance strain gauge synchronously transmits the received data to the computer control system. The computer control system transmits the collected data to the predictive machine. The predictive machine extracts predictive features from the data and outputs prediction results to the computer control system through a prediction model. Based on the prediction results, the computer control system calculates the thermal expansion force and deformation of the rock in real time. Using the above structure, the thermal expansion force and deformation of the rock can be automatically measured in real time, synchronously, and accurately under real high-temperature conditions, avoiding large differences between the measurement results and actual working conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rocks provided by the present invention.

[0022] Figure 2 This is a cross-sectional structural diagram of the high-temperature environment tank provided by the present invention.

[0023] Figure 3 This is a flowchart illustrating the steps of the real-time measurement and prediction method for thermal expansion force and deformation of high-temperature rocks provided by the present invention.

[0024] Figure 4 This is a block diagram illustrating the operating principle of the computer control system and predictor provided by the present invention.

[0025] 1-Leakage protection switch, 2-Temperature controller, 3-Temperature sensor, 4-High temperature shielded wire, 5-Heating tube wire, 6-Lifting beam, 7-Thermal insulation layer, 8-High temperature environment barrel, 9-High temperature resistant stress ring, 10-Built-in heating tube, 11-Upper pad, 12-Rock sample, 13-Lower pad, 14-Base, 15-Data transmission line 1, 16-Data transmission line 2, 17-Resistance strain gauge, 18-Computer control system, 19-Differential axial extensometer, 20-Differential circumferential extensometer, 21-Cooling water jacket device, 22-Support frame, 23-Data transmission line 3, 24-Data transmission line 4, 25-Data transmission line 5, 26-Data transmission line 6, 27-Predictive machine. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] Please see Figure 1 and Figure 2 This invention provides a real-time measurement and prediction device for the thermal expansion force and deformation of high-temperature rocks. The device includes a base 14, a high-temperature environment chamber 8, a temperature controller 2, a sample fixing assembly, a resistance strain gauge 17, a computer control system 18, a high-temperature resistance stress ring 9, a differential axial extensometer 19, a differential circumferential extensometer 20, and a prediction machine 27. The sample fixing assembly is located at the center of the upper surface of the base 14, and is used to fix the rock sample 12. The high-temperature environment chamber 8 is also located on the upper surface of the base 14. The sample fixing assembly is externally located, while the high-temperature environment chamber 8 is internally equipped with a built-in heating tube 10 and a temperature sensor 3. The high-temperature environment chamber 8 and the base 14 are externally equipped with a thermal insulation layer 7. The top of the thermal insulation layer 7 is equipped with a high-temperature resistant stress ring 9, and the bottom of the high-temperature resistant stress ring 9 is in contact with the top of the sample fixing assembly. The high-temperature environment chamber 8 is also equipped with a differential axial extensometer 19 and a differential circumferential extensometer 20. The differential axial extensometer 19 is used to measure the axial deformation of the rock sample 12, and the differential circumferential extensometer 20 is used to measure the circumferential deformation of the rock sample 12.

[0028] The high-temperature resistant resistance stress ring 9 is connected to the resistance strain gauge 17 via data transmission line 15. The resistance strain gauge 17 is connected to the computer control system 18 via data transmission line 16. The differential axial extensometer 19 is connected to the resistance strain gauge 17 via data transmission line 23. The differential circumferential extensometer 20 is connected to the resistance strain gauge 17 via data transmission line 24. The information output terminal of the computer control system 18 is connected to the information input terminal of the predictor 27 via data transmission line 25. The information output terminal of the predictor 27 is connected to the information input terminal of the computer control system 18 via data transmission line 26.

[0029] The temperature sensor 3 is electrically connected to the temperature controller 2 via a high-temperature shielded wire 4;

[0030] The built-in heating element 10 is electrically connected to the temperature controller 2 via the heating element wire 5.

[0031] In this embodiment, after the rock sample 12 is fixed using the sample fixing assembly, the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20 are passed through the pre-drilled holes in the high-temperature environment barrel 8 to complete the installation of the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20. The start-up temperature, target temperature, and heating rate of the temperature sensor 3 are set, and during the heating process, the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20 upload the measured data to the system in real time. The resistance strain gauge 17 synchronously transmits the received data to the computer control system 18. The computer control system 18 transmits the collected data to the predictive machine 27. The predictive machine 27 extracts predictive features from the data and outputs prediction results to the computer control system 18 through a prediction model. Based on the prediction results, the computer control system 18 calculates the thermal expansion force and deformation of the rock in real time. With the above structure, the thermal expansion force and deformation of the rock can be automatically measured in real time, synchronously and accurately under real high temperature environment, avoiding large differences between the measurement results and the actual working conditions.

[0032] Furthermore, the sample fixing assembly includes a lower pad 13 and an upper pad 11. The lower pad 13 is placed at the center of the upper surface of the base 14, and the upper pad 11 is placed above the lower pad 13. The rock sample 12 is placed between the upper pad 11 and the lower pad 13.

[0033] In this embodiment, the rock sample 12 is fixed by setting the lower pad 13 and the upper pad 11.

[0034] Furthermore, both the lower pad 13 and the upper pad 11 are made of heat-insulating material.

[0035] Furthermore, support frames 22 are provided on both sides of the thermal insulation layer 7. The two support frames 22 are used to support the ends of the differential axial extensometer 19 and the differential circumferential extensometer 20 that extend to the outside of the thermal insulation layer 7.

[0036] In this embodiment, the differential axial extensometer 19 and the differential circumferential extensometer 20 are fixed by the support frame 22, providing the temperature sensor 3 with a stable, known and repeatable reference that remains stable under high temperature conditions.

[0037] Furthermore, both the differential axial extensometer 19 and the differential circumferential extensometer 20 are equipped with cooling water jacket devices 21.

[0038] In this embodiment, the cooling water jacket device 21 is used to reduce the temperature of the differential axial extensometer 19 and the differential circumferential extensometer 20, preventing excessively high temperatures from affecting the accuracy of the extensometers.

[0039] Furthermore, lifting beams 6 are provided on both sides of the top of the high-temperature environment tank 8.

[0040] In this embodiment, the lifting beam 6 facilitates the removal of the high-temperature environment bucket 8 for heat dissipation after the test, thereby accelerating the test efficiency and preventing burns.

[0041] Furthermore, the real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rocks also includes a leakage current protection switch 1, which is connected to the temperature controller 2.

[0042] In this embodiment, the leakage protection switch 1 is used to connect to the power supply and is used to protect against leakage faults in the equipment and to protect against fatal electric shocks. It has overload and short circuit protection functions.

[0043] Please see Figure 3 and Figure 4 The present invention also provides a real-time measurement and prediction method for the thermal expansion force and deformation of high-temperature rocks, applied to a real-time measurement and prediction device for the thermal expansion force and deformation of high-temperature rocks as described above, comprising the following steps:

[0044] S1: After fixing the rock sample 12 by using the lower pad 13 and the upper pad 11, the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20 are passed through the reserved holes in the high-temperature environment barrel 8 to complete the installation of the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20, so that the contact ends of the high-temperature resistant stress ring 9 and the differential axial extensometer 19 are in contact with the top of the upper pad 11, so that the differential circumferential extensometer 20 is in contact with the rock sample 12.

[0045] S2: Set the start-up temperature, target temperature and heating rate of the temperature sensor 3, and during the heating process, the high-temperature resistant resistance stress ring 9, the differential axial extensometer 19 and the differential circumferential extensometer 20 will upload the measured data to the resistance strain tester 17 in real time.

[0046] S3: The resistance strain gauge 17 synchronously transmits the received data to the computer control system 18. The computer control system 18 transmits the collected data to the predictive machine 27. The predictive machine 27 extracts predictive features from the data and outputs prediction results to the computer control system 18 based on the prediction results. The computer control system 18 calculates the thermal expansion force and deformation of the rock in real time (e.g., ...). Figure 4 (As shown).

[0047] Furthermore, the specific working principle of the computer control system 18 is as follows: Through a high-speed data acquisition card, it synchronously acquires the original electrical signals from the high-temperature resistant stress ring 9, the differential axial extensometer 19, the differential circumferential extensometer 20, and the temperature sensor 3, and instantly converts them into digital quantities. Subsequently, based on preset calibration coefficients, the system calculates core physical parameters such as axial stress, axial strain, and circumferential strain in real time and in parallel. Based on these real-time results, it automatically plots stress-strain curves and actively compensates for the system's own thermal expansion errors through intelligent algorithms (such as differential measurement signal subtraction), thereby accurately extracting the true thermal expansion force and deformation of the rock. Finally, all processed data, curves, and analysis results are dynamically presented on the user interface in real time, completing the fully automated analysis from raw signals to research results.

[0048] In this embodiment, after the rock sample 12 is fixed using the sample fixing assembly, the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20 are passed through the pre-drilled holes in the high-temperature environment barrel 8 to complete the installation of the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20. The start-up temperature, target temperature, and heating rate of the temperature sensor 3 are set, and during the heating process, the high-temperature resistant stress ring 9, the differential axial extensometer 19, and the differential circumferential extensometer 20 upload the measured data to the system in real time. The resistance strain gauge 17 synchronously transmits the received data to the computer control system 18. The computer control system 18 transmits the collected data to the predictive machine 27. The predictive machine 27 extracts predictive features from the data and outputs prediction results to the computer control system 18 through a prediction model. Based on the prediction results, the computer control system 18 calculates the thermal expansion force and deformation of the rock in real time. With the above structure, the thermal expansion force and deformation of the rock can be automatically measured in real time, synchronously and accurately under real high temperature environment, avoiding large differences between the measurement results and the actual working conditions.

[0049] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A real-time measurement and prediction device for the thermal expansion force and deformation of high-temperature rocks, characterized in that, The system includes a base, a high-temperature environment chamber, a temperature controller, a sample fixing assembly, a resistance strain gauge, a computer control system, a high-temperature resistant resistance stress ring, a differential axial extensometer, a differential circumferential extensometer, and a predictor. The sample fixing assembly is located at the center of the upper surface of the base and is used to fix the rock sample. The high-temperature environment chamber is also located on the upper surface of the base and is positioned outside the sample fixing assembly. The high-temperature environment chamber contains an internal heating tube and a temperature sensor. A thermal insulation layer is provided on the exterior of the high-temperature environment chamber and the base. The high-temperature resistant resistance stress ring is installed at the top of the thermal insulation layer, and its bottom is in contact with the top of the sample fixing assembly. The differential axial extensometer and the differential circumferential extensometer are also installed on the high-temperature environment chamber. The differential axial extensometer is used to measure the axial deformation of the rock sample, and the differential circumferential extensometer is used to measure the circumferential deformation of the rock sample. The high-temperature resistant resistance stress ring is connected to the resistance strain gauge via data transmission line 1. The resistance strain gauge is connected to the computer control system via data transmission line 2. The differential axial extensometer is connected to the resistance strain gauge via data transmission line 3. The differential circumferential extensometer is connected to the resistance strain gauge via data transmission line 4. The information output terminal of the computer control system is connected to the information input terminal of the predictor via data transmission line 5. The information output terminal of the predictor is connected to the information input terminal of the computer control system via data transmission line 6. The temperature sensor is electrically connected to the temperature controller via a high-temperature shielded wire; The built-in heating element is electrically connected to the temperature controller via a heating element wire.

2. The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rock as described in claim 1, characterized in that, The sample fixing assembly includes a lower pad and an upper pad. The lower pad is placed at the center of the upper surface of the base, and the upper pad is placed above the lower pad. A rock sample is placed between the upper pad and the lower pad.

3. The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rocks as described in claim 2, characterized in that, Both the lower pad and the upper pad are made of heat-insulating material.

4. The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rocks as described in claim 3, characterized in that, Support frames are provided on both sides of the thermal insulation layer. The two support frames are used to support the ends of the differential axial extensometer and the differential circumferential extensometer that extend to the outside of the thermal insulation layer.

5. The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rock as described in claim 4, characterized in that, Both the differential axial extensometer and the differential circumferential extensometer are equipped with cooling water jackets.

6. The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rock as described in claim 5, characterized in that, The high-temperature environment tank is equipped with lifting beams on both sides of the top.

7. The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rock as described in claim 6, characterized in that, The real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rocks also includes a leakage current protection switch, which is connected to the temperature controller.

8. A method for real-time measurement and prediction of thermal expansion force and deformation of high-temperature rock, applied to the real-time measurement and prediction device for thermal expansion force and deformation of high-temperature rock as described in claim 7, characterized in that, Includes the following steps: After the rock sample is fixed by the cooperation of the lower pad and the upper pad, the high-temperature resistant stress ring, the differential axial extensometer, and the differential circumferential extensometer are passed through the reserved holes in the high-temperature environment barrel to complete the installation of the high-temperature resistant stress ring, the differential axial extensometer, and the differential circumferential extensometer. The contact ends of the high-temperature resistant stress ring and the differential axial extensometer are in contact with the top of the upper pad, so that the differential circumferential extensometer is in contact with the rock sample. The start-up temperature, target temperature, and heating rate of the temperature sensor are set, and during the heating process, the high-temperature resistant resistance stress ring, the differential axial extensometer, and the differential circumferential extensometer upload the measured data to the resistance strain tester in real time. The resistance strain gauge synchronously transmits the received data to the computer control system, which in turn transmits the collected data to the predictive machine. The predictive machine extracts predictive features from the data and outputs prediction results to the computer control system via a prediction model. Based on the prediction results, the computer control system calculates the thermal expansion force and deformation of the rock in real time.

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