Method and system for analyzing freeze-thaw damage to rocky slopes in mines

Abstract

The present invention relates to the technical field of mine rocky slope analysis, specifically to a method and system for analyzing freeze-thaw damage to mine rocky slopes. The method includes the steps of selecting a mine rocky slope sample, conducting a freeze-thaw cycle test on the mine rocky slope sample to obtain rock freeze-thaw test information, setting a displacement analysis index based on the rock freeze-thaw test information and obtaining the displacement change of the rocky slope during the freeze-thaw cycle based on the displacement analysis index, analyzing the plastic damage of the rocky slope during the freeze-thaw cycle and the mine safety factor based on the rock freeze-thaw test information, constructing a stress analysis model based on the rock freeze-thaw test information and obtaining the stress distribution of the rocky slope during the freeze-thaw cycle using the stress analysis model, and analyzing the damage results of the mine rocky slope by combining the displacement change, plastic damage, mine safety factor, and stress distribution. The present invention ensures the stability of the rocky slope by analyzing the freeze-thaw damage of the rocky slope based on multiple goals.

Description

[Technical Field]

[0001] The present invention relates to the technical field of mine rock slope analysis, and in particular to a mine rock slope freeze-thaw damage analysis method and system. [Background technology]

[0002] During the freeze-thaw cycle, the freezing and thawing of water in rock pores causes the rock volume to expand and contract, which in turn causes the expansion and penetration of microcracks within the rock, ultimately resulting in the deterioration of the macromechanical properties of the rock. This process involves complex physical, chemical, and mechanical processes, including the formation and disappearance of ice crystals, changes in pore water pressure, and changes in the microstructure within the rock.

[0003] The dynamic development process of open-cut mine slopes in cold regions is greatly affected by seasonal temperature changes. The slope shape is subject to the cycle of winter freezing and spring thawing, along with cyclical temperature changes. Different rock slopes are exposed for different periods of time, resulting in different degrees of freeze-thaw damage. The freeze-thaw process has a significant impact on slope stability, which can lead to geological disasters such as landslides and collapses of mine rock slopes.

[0004] In complex and variable geological conditions, existing methods for analyzing freeze-thaw damage to rocky slopes do not take into account the mutual influence between rock microstructural changes and macromechanical properties during the freeze-thaw process, making it difficult to capture the changes in slope soil caused by freeze-thaw. Therefore, existing analysis methods cannot fully and accurately reflect the impact of freeze-thaw damage on slope stability, and have certain limitations in predicting and preventing geological disasters such as landslides and collapses. Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the shortcomings of the conventional methods and the needs of practical applications, the present invention contributes to fully and accurately reflecting the damage situation and stability of rock slopes during freeze-thaw cycles by analyzing factors such as displacement, plasticity, safety index, and stress of rock slopes during freeze-thaw cycles based on test information. [Means for solving the problem]

[0006] In a first aspect, the present invention provides a method for analyzing freeze-thaw damage to rocky slopes in mines, which includes the steps of selecting a rocky slope sample from mines, conducting a freeze-thaw cycle test on the rocky slope sample from mines, and obtaining rock freeze-thaw test information, setting a displacement analysis index based on the rock freeze-thaw test information, and obtaining the displacement change status of the rocky slope during freeze-thaw cycles based on the displacement analysis index; The method includes the steps of analyzing the plastic damage situation and mine safety factor of the rocky slope during freeze-thaw cycles based on the rock freeze-thaw test information, constructing a stress analysis model based on the rock freeze-thaw test information and obtaining the stress distribution situation of the rocky slope during freeze-thaw cycles using the stress analysis model, and analyzing the damage consequences of the rocky slope during freeze-thaw cycles by combining the displacement change situation, the plastic damage situation, the mine safety factor, and the stress distribution situation.The present invention comprehensively evaluates the damage consequences of the rocky slope during freeze-thaw cycles by combining the displacement change situation, the plastic damage situation, the mine safety factor, and the stress distribution situation, thereby providing a scientific basis for mine slope management measures and disaster prevention and mitigation plans.

[0007] Preferably, conducting a freeze-thaw cycle test on the mine rocky slope sample and obtaining rock freeze-thaw test information includes setting a freeze-thaw temperature range, a freeze-thaw cycle time, and a number of freeze-thaw cycles based on the characteristics of the mine rocky slope sample, and conducting a freeze-thaw cycle test on the mine rocky slope sample based on the freeze-thaw temperature range, the freeze-thaw cycle time, and the number of freeze-thaw cycles to obtain rock freeze-thaw test information. By taking into account the specific characteristics of the mine rocky slope sample, the present invention can more accurately set the freeze-thaw conditions, make the test data closer to a real environment, and improve the precision and accuracy of the test results.

[0008] Preferably, setting displacement analysis indicators based on the rock freeze-thaw test information includes setting a first analysis indicator including a rock mass loss rate based on the rock freeze-thaw test information, and setting a second analysis indicator including rock porosity based on the rock freeze-thaw test information. The present invention quantitatively evaluates the degree of damage and microstructural changes in rock during freeze-thaw cycles using the set analysis indicators, thereby providing a reliable basis for analyzing slope stability, and combining multiple analysis indicators to more comprehensively grasp the changes in rock during freeze-thaw cycles, thereby providing a comprehensive basis for judgment on slope management and disaster prevention and mitigation.

[0009] Preferably, acquiring the displacement change status of the rocky slope during freeze-thaw cycles based on the displacement analysis index includes analyzing the displacement change status of the rocky slope during freeze-thaw cycles by combining the rock mass loss rate, the rock porosity, and the rock freeze-thaw test information; The rock mass loss rate satisfies the following relationship:

number

number

[0010] Preferably, analyzing the plastic damage status of the rock slope during freeze-thaw cycles and the mine safety factor based on the rock freeze-thaw test information includes constructing a safety factor prediction model based on the plastic damage status and the rock freeze-thaw test information; The safety factor prediction model satisfies the following relationship:

number

[0011] Preferably, constructing a stress analysis model based on the rock freeze-thaw test information includes constructing a shear stress analysis model based on the rock freeze-thaw test information, constructing a principal stress analysis model based on the rock freeze-thaw test information and the shear stress analysis model, and obtaining a stress analysis model based on the shear stress analysis model and the principal stress analysis model. The present invention contributes to accurately predicting the mechanical behavior of rock during freeze-thaw cycles using a stress analysis model and accurately analyzing the freeze-thaw damage state of rock.

[0012] Preferably, the shear stress analytical model satisfies the following relationship:

number

[0013] Preferably, the principal stress analysis model satisfies the following relationship:

number

[0014] Preferably, analyzing the damage results of a mine rocky slope during freeze-thaw cycles by combining the displacement change, plastic damage, mine safety factor, and stress distribution includes: setting damage analysis factors for a mine rocky slope during freeze-thaw cycles, including the displacement change, plastic damage, mine safety factor, and stress distribution, and obtaining damage analysis results; and evaluating the stability of the mine rocky slope by combining the damage analysis results and the rock freeze-thaw test information. By comprehensively considering factors such as displacement change, plastic damage, safety factor, and stress distribution, the present invention can more comprehensively evaluate the damage results of a mine rocky slope during freeze-thaw cycles, more accurately reflect the actual condition of the slope, and avoid errors in evaluation due to a single factor.

[0015] In a second aspect, to efficiently implement the method for analyzing freeze-thaw damage to rocky slopes in mines according to the present invention, the present invention also provides a system for analyzing freeze-thaw damage to rocky slopes in mines, comprising a processor, an input device, an output device, and a memory, the processor, the input device, the output device, and the memory being connected to one another, the memory being used to store a computer program, the computer program including program instructions, the processor being configured to call the program instructions, and implementing the method for analyzing freeze-thaw damage to rocky slopes in mines according to the first aspect of the present invention. The system for analyzing freeze-thaw damage to rocky slopes in mines according to the present invention has a compact structure and stable performance, allowing it to stably implement the method for analyzing freeze-thaw damage to rocky slopes in mines according to the present invention, thereby enhancing the overall applicability and practical application of the present invention. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a flowchart of the mine rock slope freeze-thaw damage analysis method of the present invention. [Figure 2] FIG. 1 is a schematic diagram showing the change in mass loss of a rocky slope during a freeze-thaw cycle according to the present invention. [Figure 3] 1 is a schematic diagram of the change in porosity of a rocky slope during a freeze-thaw cycle according to the present invention. FIG. [Figure 4] FIG. 1 is a schematic diagram showing the change in displacement of a rocky slope during a freeze-thaw cycle according to the present invention. [Figure 5] 1 is a schematic diagram of the plastic damage state of a rocky slope during freeze-thaw cycles according to the present invention. [Figure 6] FIG. 1 is a schematic diagram of a safety factor curve for a rocky slope according to the present invention. [Figure 7] FIG. 1 is a schematic diagram of the maximum principal stress versus time for a rocky slope during a freeze-thaw cycle according to the present invention. [Figure 8] 1 is a structural diagram of the mine rock slope freeze-thaw damage analysis system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The method and system for analyzing freeze-thaw damage to rocky slopes in mines according to the present invention is disclosed in Chinese patent application CN119066884A. Referring to Figure 1, the present invention systematically analyzes the main factors, such as displacement change, plastic damage, safety index, and stress distribution, of rocky slopes in mines under the action of freeze-thaw cycles. This not only significantly deepens our understanding of the damage mechanism of rocky slopes in freeze-thaw environments, but also provides powerful technical support for achieving comprehensive and accurate assessment of slope stability. The present invention also provides a method for analyzing freeze-thaw damage to rocky slopes in mines. The method includes the following steps:

[0018] In step S1, a rocky slope sample is selected, and a freeze-thaw cycle test is performed on the rocky slope sample to obtain rock freeze-thaw test information. The specific steps and contents are as follows:

[0019] First, the freeze-thaw temperature range, freeze-thaw cycle time, and freeze-thaw cycle number are set based on the characteristics of the mine rock slope sample, as follows:

[0020] In the example, three groups of mine rocky slope samples with different moisture contents are selected and labeled as A, B, and C, respectively. Freeze-thaw cycle tests are conducted on the mine rocky slope samples, thereby simulating and studying the freezing and thawing process of mine rocky slopes in a natural environment.

[0021] During the test, it is necessary not only to observe the damage signs on the rock surface, such as crack propagation and spalling, under different freeze-thaw cycles, but also to use advanced techniques such as ultrasonic wave velocity testing and thermal conductivity measurement to deeply analyze the damage caused by freeze-thaw cycles to the internal structure of the mine rock slope samples from a microscopic perspective.

[0022] Different rock samples have different physical mechanical properties and microstructural characteristics, which result in different response characteristics to freeze-thaw cycles. Therefore, it is necessary to set freeze-thaw conditions that suit the sample characteristics, which contributes to more accurate evaluation of the damage state and stability changes of rocks during freeze-thaw cycles. In the embodiment, the freeze-thaw temperature range, freeze-thaw cycle time, and number of freeze-thaw cycles are set based on the characteristics of the mine rock slope sample.

[0023] (1) Set and select the freeze-thaw temperature range. Based on past meteorological data for the area where the mine rocky slope samples are located, the annual temperature fluctuations, monthly minimum and maximum temperatures, and temperature extremes in the area where the samples are located are analyzed. In order to more realistically simulate the diurnal and seasonal temperature changes experienced by the mine rocky slope samples, in this embodiment, a freeze-thaw temperature range is set between the minimum and maximum extreme temperatures based on the meteorological data. This completely covers the extreme cold and normal temperature environments that the mine rocky slope samples in the area may encounter, ensuring the accuracy and representativeness of the test results.

[0024] (2) Set the freeze-thaw cycle time. Based on the diurnal temperature and climate observation data for the area where the mine rock slope sample is located, the average daily freezing period or freezing duration for that area is obtained. To accurately simulate the temperature change process under natural conditions, in this embodiment, the freeze-thaw cycle time is set based on the freezing period information to have a 16-hour freezing phase and an 8-hour thawing phase, for a total of 24 hours. This time setting condition ensures that the test results accurately reflect the daytime and nighttime temperature changes of the mine rock slope sample in an actual environment, allowing for test conclusions that are closer to the actual environment.

[0025] (3) Set the number of freeze-thaw cycles. After comprehensively analyzing the number of daytime and nighttime freeze-thaw cycles actually experienced in the area where the mine rocky slope samples were located and the specific laboratory conditions, the maximum number of freeze-thaw cycles for the test in this example was selected to be 30. This number of freeze-thaw cycles not only took into account the effects of freeze-thaw cycles that the mine rocky slope samples might be subjected to over a long period of time, but also took into account operability under laboratory conditions and the stability of the results. A simulation of 30 freeze-thaw cycles can comprehensively reveal the changes in the physical mechanical properties of the mine rocky slope samples and the effects on slope stability caused by repeated freeze-thaw cycles.

[0026] Furthermore, the rock freeze-thaw test conditions in this embodiment are merely one preferred condition of the present invention. In other embodiments, the rock freeze-thaw test conditions can be flexibly adjusted based on the experimental goals and the conditions of the experimental equipment. Different areas of mine rock slopes face different natural environmental conditions, including temperature, humidity, rainfall, etc. Customizing the freeze-thaw test conditions based on specific experimental goals can more accurately simulate the natural environment experienced by the rocks in the target area and reduce uncertainties in the test process.

[0027] Then, based on the freeze-thaw temperature range, freeze-thaw cycle time, and freeze-thaw cycle number, a freeze-thaw cycle test is performed on the rocky slope sample of the mine to obtain rock freeze-thaw test information, the specific contents of which are as follows:

[0028] The initial mass and ultrasonic wave velocity of the rocky slope samples were systematically measured. Then, different numbers of freeze-thaw cycles (5, 10, 20, and 30) were performed, and the changes in mass and ultrasonic wave velocity after each cycle were recorded. This allowed for the creation of curves showing the relationship between mass change and the number of freeze-thaw cycles, as well as the change in ultrasonic wave velocity as a function of the number of freeze-thaw cycles. This allowed for a detailed analysis of the changes in related physical properties during the freeze-thaw process. At the same time, careful attention was paid to any damage to the rocky slope samples, such as cracks and spalling. The number of freeze-thaw cycles at which these phenomena first appeared was recorded, contributing to the evaluation of the stability of the rocky slopes. Furthermore, the thermal conductivity of the rocky slope samples was measured and recorded after 5, 10, 20, and 30 freeze-thaw cycles. A thermal conductivity vs. number of freeze-thaw cycles curve was also created, allowing for the analysis of the changes in thermal conductivity and its impact on the test results.

[0029] Next, systematic strength tests were conducted on the mine rock slope samples to evaluate their mechanical performance under different conditions. The initial uniaxial compressive strength of the mine rock slope samples was measured in a completely dry state, thereby obtaining the basic mechanical properties of rock slope samples without environmental treatment and providing reference data for subsequent comparative analysis. Complex testing procedures were also conducted to investigate the effect of freeze-thaw cycles on uniaxial compressive strength. The mine rock slope samples were subjected to saturated conditions and then their initial uniaxial compressive strength was measured, contributing to understanding the effect of water saturation on the strength of the rock slope samples. Furthermore, the uniaxial compressive strength of the mine rock slope samples was measured again after they had undergone multiple freeze-thaw cycles to clarify the effect of short-term freeze-thaw cycles on the strength of the rock slope and evaluate its freeze-thaw resistance.

[0030] In one preferred embodiment, the mine rock slope samples of Group A were placed in an electric constant temperature air drying oven for thorough drying. The mine rock slope samples of Group B were used as a control group and kept in their original state without any treatment. The mine rock slope samples of Group C were subjected to a free immersion method to ensure that the water inside the rock was completely saturated, thereby achieving the desired moisture content.

[0031] A comprehensive performance test was conducted on all three groups of mine rock slope samples (A, B, and C) in the initial state, including but not limited to accurate measurements of mass, area, ultrasonic wave velocity, and thermal conductivity coefficient, and relevant data was recorded in detail to serve as the basis for subsequent comparative analysis.

[0032] Groups A and C were selected and subjected to uniaxial compression tests in the initial state using a universal testing machine. During this process, the stress-strain relationship and uniaxial compressive strength of the test blocks were carefully recorded to evaluate their initial mechanical performance.

[0033] Three groups of test blocks, A, B, and C, were placed in a horizontal cryogenic test box and subjected to rigorous freeze-thaw cycles. Each cycle included 16 hours of freezing (at cryogenic temperatures) followed by 8 hours of thawing (in a thermostatic box at 20°C), for a total of 24 hours. The entire test process involved 30 repeated freeze-thaw cycles, simulating the long-term freeze-thaw behavior of rocky slopes in a mine in a natural environment.

[0034] After completing 5, 10, 20, and finally 30 freeze-thaw cycles, the mine rock slope samples were measured for mass, area, ultrasonic wave velocity, and thermal conductivity. Group A samples were dried in a drying oven for 24 hours before measurement to eliminate moisture interference. Group B samples were left at room temperature for 24 hours to reach a stable state. Group C samples were immersed in pure water for 24 hours, then quickly wiped with a dry towel to remove surface moisture before measurement.

[0035] Furthermore, tests were conducted on the mine rock slope samples after freezing and thawing. After a certain number of freeze-thaw cycles (5th, 10th, 20th, and 30th), the corresponding mine rock slope samples in Group C were selected to undergo uniaxial compression tests. The stress-strain curves and uniaxial compressive strength data from each test were recorded and analyzed to explore the effects of freeze-thaw cycles on the performance of the test blocks and mine rock slope samples, as well as the rules of change.

[0036] In this embodiment, the freeze-thaw conditions set according to the characteristics of the sample include, but are not limited to, temperature ranges, cycle times, and number of cycles. This allows for a more accurate simulation of the freeze-thaw process experienced by rock in a real environment, thereby enabling a more accurate assessment of the damage to the rock caused by freeze-thaw cycles. During the experimental process, detailed records of the main parameters of the sample at different freeze-thaw stages were recorded to obtain information on the freeze-thaw test of the rock, providing a reliable basis for assessing the damage to the rock, contributing to the subsequent construction of an analytical model related to rock damage, and contributing to the prediction of the change trend of rock stability under long-term freeze-thaw action.

[0037] Furthermore, in this embodiment, the method for acquiring rock freeze-thaw test information is only one preferred condition of the present invention. In other embodiments, the method for acquiring mine rock slope information can be flexibly selected based on actual conditions. Flexible selection of information acquisition methods can collect more diverse and comprehensive rock freeze-thaw test data, which can provide strong support for subsequent data analysis, model construction, and result analysis.

[0038] In step S2, a displacement analysis index is set based on the rock freeze-thaw test information, and the displacement change status of the rock slope during the freeze-thaw cycle is acquired based on the displacement analysis index. The specific steps and contents are as follows:

[0039] To comprehensively and scientifically evaluate the displacement of rock slopes under the action of freeze-thaw cycles, a displacement analysis system was designed based on the information from rock freeze-thaw tests. This system mainly includes the rock mass loss rate and rock porosity, allowing for accurate analysis of the relationship between the mass and structural changes of rock samples and the displacement of rock slopes.

[0040] In this example, the rock mass loss rate was used as the first analytical index. After undergoing 5, 10, 20, and 30 freeze-thaw cycles, the difference between the dry mass and the initial dry mass of different mine rock slope samples was analyzed as a percentage of the initial mass. This not only effectively quantified the mass loss of rock slope samples during the freeze-thaw process, but also reduced analytical errors caused by differences in the initial mass of the samples, providing reliable data support for subsequent displacement analysis.

[0041] The rock mass loss rate satisfies the following relationship:

number

[0042] The mass loss rate refers to the percentage of the difference between the dry mass and the initial dry mass of a rocky slope in a mine after a certain number of freeze-thaw cycles. This allows for quantitative analysis of the mass loss of rocky slopes in a mine under freeze-thaw cycles, and ultimately provides a deeper understanding of the effects of freeze-thaw cycles on the physical properties of rock.

[0043] The second analytical index is set based on the rock freeze-thaw test information, and in the embodiment, the second analytical index includes rock porosity, which can reflect the change in the internal spatial structure of the rock and is closely related to the mechanical performance and stability of the rock.

[0044] During the freeze-thaw process, the change in porosity is one of the important macroscopic expressions that reflect the deterioration of physical properties. Measuring the porosity of rocks after different freeze-thaw cycles can be used as a basis for analyzing freeze-thaw damage to rock slopes.

[0045] The rock porosity satisfies the following relationship:

number

[0046] Rock porosity was calculated by comparing the difference between the saturated and dry mass of the rock after a specific number of freeze-thaw cycles, adjusting for the density of water and the geometric dimensions of the rock.

[0047] The saturated mass of a rock after freeze-thaw is the mass of the rock after it has been fully submerged in water and the excess water has been removed. The dry mass of a rock after freeze-thaw is the mass of the rock in its dry state after a freeze-thaw cycle.

[0048] Rock porosity reflects the ratio of the pore volume to the total volume of a rock. With increasing freeze-thaw cycles, the microcracks and pores inside the rock may gradually expand, leading to an increase in porosity. This change not only affects the rock's physical properties, such as permeability and water absorption, but also its mechanical performance and stability.

[0049] The rock mass loss rate, rock porosity, and rock freeze-thaw test information are combined to analyze the displacement changes of rock slopes during freeze-thaw cycles. The specific implementation details are as follows:

[0050] Under a given stress level, the mass loss rate exhibits a significant increasing trend with an increase in the number of freeze-thaw cycles. This trend can be characterized by a power function model. Specifically, as shown in Figure 2, the fitting curves not only intuitively reveal the quantitative relationship between the two, but also show correlation coefficients greater than 0.96, demonstrating the reliability of the fitting results and further validating the validity and accuracy of the rock mass loss rate model.

[0051] Furthermore, the analysis results and image information of the rock mass loss rate show that for the same number of freeze-thaw cycles, the stress level experienced during the freeze-thaw process has a significant effect on the rock mass loss rate. That is, as the stress level gradually increases, the damage suffered by the rock during the freeze-thaw process also becomes more severe, resulting in a larger mass loss rate. This shows that stress level is one of the important factors controlling the degree of damage caused by freeze-thawing to rock, and its changes can directly affect the stability and integrity of the internal structure of the rock.

[0052] To analyze the changing trends in porosity of freeze-thaw slope samples and their physical mechanisms, please refer to Figure 3. Figure 3 intuitively shows the changing trends in rock porosity with increasing freeze-thaw cycles at different stress levels, revealing the impact of freeze-thaw cycles on the microstructure within the rock. At the same stress level, the porosity of rock tends to increase with increasing freeze-thaw cycles. During the freeze-thaw process, the freezing expansion effect of pore water within the rock and the water transition due to the temperature gradient cause fractures in the rock, which then develop and penetrate, further increasing the number of cracks and increasing the complexity of the pore structure.

[0053] When rock slope samples are subjected to a freeze-thaw cycle under ultimate compressive strength, the rate of porosity increase is slower than that observed under unloaded freeze-thaw conditions. This indicates that appropriate loads can, to a certain extent, inhibit the destructive effects of the freeze-thaw process on rock pore walls. Increasing the stress state within the rock can offset some of the destructive effects of ice expansion. At the same time, low-level loads during the thawing process can also promote the consolidation of pores and cracks within the rock, further limiting the increase in porosity.

[0054] However, as the load level increases during the freeze-thaw process, the rate of increase in rock porosity actually increases. This is because the long-term high load gradually weakens the rock's bearing capacity, causing damage to the rock due to freeze-thaw cycles, making it more susceptible to flow changes and deformation. The deformation process promotes the transformation of small pores into large pores and the generation, transformation, and expansion of new cracks, ultimately resulting in a significant increase in the porosity of the mine's rocky slopes.

[0055] Based on the rock mass loss rate and rock porosity, the displacement change of rock slopes during freeze-thaw cycles is obtained, as follows:

[0056] The amount of displacement change of a rocky slope directly reflects the deformation and failure process of the slope, which gradually changes with the increasing freeze-thaw time. As shown in Figure 4, the slope's own gravitational field, as its own driving force, plays a leading role in the displacement change process, intensifying the development of rocky slope displacement. To more comprehensively evaluate the impact of freeze-thaw cycles on slope stability, the example incorporates the rock mass loss rate, which directly reflects the degree of rock loss caused by freeze-thaw cycles, and thus quantitatively analyzes the contribution and mechanism of rock mass change to slope displacement.

[0057] The displacement change diagram shown in Figure 4 can be used to analyze the displacement change characteristics of the mine rock slope sample at different freeze-thaw stages. As can be seen from the diagram, after five freeze-thaw cycles, the overall displacement of the mine rock slope did not show any significant change. This indicates that the impact of freeze-thaw on slope stability is minor in the early stages. However, as the number of freeze-thaw cycles continues to increase, obvious signs of displacement begin to appear on the mine rock slope. After 10 freeze-thaw cycles, the slope surface, especially the rock mass in the upper tier, begins to show small amounts of displacement. This indicates that local areas of the mine rock slope have been affected by freeze-thaw.

[0058] As the number of freeze-thaw cycles increases to 20 and then 30, the displacement and change of the mine rock slopes becomes more severe. The effects of freeze-thaw on the internal structure of the slopes are persistent, cumulative, and gradual. As the water freezes and thaws repeatedly, the microcracks inside the rock gradually expand, the pore structure changes significantly, and the porosity increases. This weakens the strength, hardness, and stability of the entire rock.

[0059] Increased porosity not only directly reduces the effective bearing area of ​​rock slopes, but also promotes water infiltration and retention over a wider area, further exacerbating the scope and intensity of the freezing expansion and thaw settlement effects within the rock. Due to the coupling of these physical and mechanical processes, slopes undergo significant deformation during freeze-thaw cycles. In one preferred embodiment, the slope appears to subside and move laterally until localized collapse occurs. Observing and analyzing the deformation changes of rock slopes during freeze-thaw cycles based on changes in rock porosity not only contributes to a deeper understanding of the physical basis of slope stability degradation, but also provides a scientific basis for effective slope protection and reinforcement measures.

[0060] Furthermore, the rocky slope displacement analysis method in this embodiment is merely one preferred embodiment of the present invention. In one or more other embodiments, the displacement analysis method can be changed based on the specific conditions of the rocky slope in the mine and the freeze-thaw damage analysis objectives. Because different rocky slopes in the mine have unique geological conditions, rock types, structural features, and environmental factors, selecting or adjusting the displacement analysis method can ensure the accuracy and precision of the analysis results and improve the applicability of the mine rocky slope freeze-thaw damage analysis method.

[0061] In step S3, the plastic damage status of the rock slope and the mine safety factor during the freeze-thaw cycle are analyzed based on the rock freeze-thaw test information, the specific implementation steps and contents are as follows:

[0062] In one preferred embodiment, the plastic damage status of rock slopes during freeze-thaw cycles is analyzed based on rock freeze-thaw test information.

[0063] As the number of freeze-thaw cycles increases, the damage to rock slopes gradually increases from minor to significant. This process can be clearly illustrated by quantitative analysis of equivalent plastic strain. As shown in Figure 5, the working times corresponding to different freeze-thaw cycles are marked, mainly including 120 hours, 240 hours, 480 hours, and 720 hours.

[0064] As can be seen from the schematic diagram of plastic damage in Figure 5, the damage evolution trajectory of the rock slope at different freeze-thaw stages shows that there is no significant sign of plastic damage after five freeze-thaw cycles (120 hours), and after the subsequent 10 (240 hours), 20 (480 hours), and 30 (720 hours) freeze-thaw cycles, the damage area gradually becomes apparent and gradually expands. This process reflects the persistent effect of freeze-thaw cycles on the slope rock mass.

[0065] After 10 freeze-thaw cycles, signs of plastic damage began to appear on the surface of the rock slope, especially in the lower and shallow parallel slope areas of the slope. This indicated the onset of the freeze-thaw damage mechanism. Furthermore, with the gradual increase in the number of freeze-thaw cycles, the damage area significantly expanded, and the damage expansion pattern showed obvious regularity. The damage area was centered at the lower part of the slope, and the damage gradually penetrated into the slope. At the same time, the damage on the slope propagated in a direction parallel to the slope. The distribution of plastic damage not only revealed the local stress concentration effect of freeze-thaw, but also signified the gradual deterioration of the overall stability of the slope.

[0066] The plastic damage of rock slopes during freeze-thaw cycles is a complex and dynamic process involving the interaction and influence of multiple factors, which can be intuitively expressed through quantitative analysis of equivalent plastic strain. This process not only reveals the vulnerability of rock slopes in extreme environments, but also provides important reference for formulating effective protective measures in engineering practice.

[0067] A safety factor prediction model is constructed based on the plastic damage state and rock freeze-thaw test information.

[0068] The safety factor prediction model satisfies the following relationship:

number

[0069] Based on the plastic damage, a rock freezing and thawing safety factor prediction model is constructed, and each parameter of the prediction model is correlated with the actual condition of the slope and the freezing and thawing effect. The rock slope safety factor can be an important indicator for directly judging slope stability. The freezing depth of a rock slope reflects the severity of the impact of freezing and thawing on the internal structure of the slope. Considering the overall slope shape and boundary conditions, the length of the rock slope can affect slope stability.

[0070] To further improve the safety factor prediction model, based on the information from rock freeze-thaw tests, the freezing depth and slope length of a series of rock slopes under different freeze-thaw cycles are collected, and the safety factor is obtained through numerical simulation, physical model tests, or on-site monitoring.

[0071] The relevant data for the safety factor was analyzed to explore potential relationships between the frost depth and slope length and the safety factor. A portion of the data was used as a training set to fit the model parameters, and the remaining data was used as a test set to verify the accuracy and generalization ability of the model. The model parameters were adjusted based on the verification results to improve the model's predictive accuracy. The adjusted model was then applied to actual engineering problems, and the model was further optimized based on the feedback. As the plastic damage situation changed, the shape and depth of the rocky slope's slide surface also changed, making the slope more susceptible to shallow landslides and reducing the overall safety stability. See Figure 6 for the changes in the safety factor.

[0072] Furthermore, the method for analyzing the safety factor of rock slopes during freeze-thaw cycles in this embodiment is merely one preferred condition of this embodiment. In one or several other embodiments, the analysis method for rock slopes can be adjusted based on the actual conditions of the rock slopes and the target needs for mine stability. The analysis method in this embodiment has flexibility and adjustability, which can enhance the adaptability and practicality of the method of the present invention.

[0073] In step S4, a stress analysis model is constructed based on the rock freeze-thaw test information, and the stress distribution status of the rock slope during the freeze-thaw cycle is obtained using the stress analysis model. The specific implementation steps and contents are as follows:

[0074] Based on the rock freeze-thaw test information, the shear stress change data of the rock slope during the complete freeze-thaw cycle is obtained, and the mechanism of the effect of freeze-thaw cycles on the stability of the rock slope is analyzed. As the freeze-thaw cycle progresses, the mechanical behavior of the slope exhibits obvious gradual characteristics. In the early stage of the freeze-thaw cycle, as the temperature drops, frost damage begins to appear on the surface of the rock slope, leading to a deterioration in the physical and mechanical properties of the rock slope. During this process, the shear stress on the slope surface increases significantly, and significant stress concentration occurs, especially in the geometrically weak areas at the boundary between the steep and gentle slopes at the bottom of the slope. This phenomenon means that the slope will soon become deformed and unstable, and the lower areas of the rock slope will become the starting point for failure.

[0075] The middle stage involves the melting of the freeze-thaw cycle and the release of stress. As the freeze-thaw cycle progresses, the temperature of the external environment gradually rises, and the frozen water in the cracks inside the rock begins to melt. This process, along with the gradual decrease in shear stress on the slope surface, means that the melting action will to some extent relieve the local stress concentration on the rock slope, but at the same time, it may cause new hydrogeological problems such as increased seepage.

[0076] The later stage involves refreezing and stress rebuilding. When the freeze-thaw cycle enters the next low-temperature stage, the temperature of the external environment drops again, causing the water in the cracks inside the slope to freeze again. The frost heaving action of the ice generates additional freezing expansion force, exacerbating the stress state inside the rock slope. At this time, the shear stress on the slope increases again as the temperature drops, meaning that the stability of the rock slope will continue to deteriorate.

[0077] Due to repeated freezing and thawing, rock slopes go through a complete process from initial frost damage, intermediate thawing, to late refreezing. During this process, the mechanical properties of the rock mass are constantly deteriorating, and shear stresses are repeatedly concentrated and released in weak areas such as the lower slope. Finally, due to the repeated action of freezing and expansion forces, the rock mass gradually accumulates damage, eventually leading to deformation and failure.

[0078] In this embodiment, a shear stress analysis model is constructed based on rock freeze-thaw test information. The shear stress analysis model satisfies the following relationship:

number

[0079] The loads that rocks are subjected to refer to various external forces or actions that can cause stress, strain, or displacement within the rocks. The loads may be from the natural environment or human activities, and specifically include, but are not limited to, self-weight stress, structural stress, engineering load, and earthquake load. The loads that rocks are subjected to act collectively on the rock mass, affecting its stability, deformation behavior, and failure pattern. The loads in rock engineering design and construction directly affect the safety and stability of the engineering.

[0080] The included angle between the rock and the horizontal ground refers to the included angle between the reference plane in the rock and the horizontal plane, which contributes to understanding the inclination and stability of the rocky slope in the mine in this example, and provides a reference basis for subsequent damage analysis of the rocky slope in the mine.

[0081] The friction coefficient of a shear stress measurement roller refers to the ratio of the friction force due to the relative motion or trend of relative motion between the contact surface of the roller and the rock slope sample to the normal pressure exerted on the roller during the shear stress measurement process. This ratio is a dimensionless physical quantity used to describe the friction characteristics of the roller under specific conditions.

[0082] Based on the rock freeze-thaw test information, a curve image of the maximum principal stress versus time of the rock slope during the freeze-thaw cycle is created, as shown in Fig. 7, to further analyze the stress distribution situation of the rock slope during the freeze-thaw cycle.

[0083] As can be seen from the time-dependent change curve of the maximum principal stress, during the cyclic freeze-thaw cycle, the maximum principal stress exhibits obvious bidirectional wave characteristics. This wave pattern directly reflects the influence of environmental temperature changes on the internal stress state of a rocky slope. In one preferred embodiment, as the external environmental temperature drops, water in the cracks of the rocky slope gradually freezes into ice, resulting in volume expansion and the generation of significant freezing and swelling forces. Therefore, the slope surface experiences tensile stress, manifesting as the maximum principal stress fluctuating toward positive values. Conversely, as the external environmental temperature rises, the ice in the cracks gradually melts, releasing the freezing and swelling forces, causing the slope to experience compressive stress, resulting in the maximum principal stress decreasing toward negative values.

[0084] In another preferred embodiment, under static conditions, i.e., without considering the effects of freeze-thaw cycles, the stress distribution on the slope is mainly controlled by the action of gravity. Based on the information from the rock freeze-thaw test, the initial stress states at different observation points are obtained. Since the lower part of the slope bears the entire weight of the rock slope, its maximum principal stress value is obviously higher than that of the upper part, and it appears to be mainly in a compressive stress state. This indicates that the stability of the slope is mainly constrained by the stress state in the lower part of the slope due to the action of gravity.

[0085] In another preferred embodiment, the effects of freeze-thaw cycles on rock slope stability are analyzed. The dynamic effects of freeze-thaw cycles make slope stability more complex. The displacement changes indicate that stress is concentrated and cracks are relatively abundant at the lower part of the slope, making this area the most sensitive and intense area for freeze-thaw action. As the freeze-thaw cycles continue, the fluctuation range of the maximum principal stress at the lower part of the slope increases significantly, not only intensifying fatigue damage to the rock slope but also promoting further crack propagation and penetration. Combined with the analysis of plastic damage to slopes under freeze-thaw action, it can be seen that deformation damage in rock slopes gradually spreads upward from the lower part of the slope. This contributes to understanding the mechanism of slope instability in freeze-thaw environments, and is of great significance for assessing the long-term stability of rock slopes and formulating effective protective measures. A principal stress analysis model is constructed based on rock freeze-thaw test information and shear stress. The principal stress analysis model satisfies the following relationship:

number

[0086] The maximum principal stress of a rock slope refers to the maximum stress value among all stress directions at a certain point on the rock slope, which may be tensile stress or compressive stress, and is specifically determined by the rock's force-bearing situation and stress state.

[0087] The uniaxial compressive strength of rock refers to the load per unit area when a mine rock slope sample is fractured by an axial force under conditions without lateral constraint, i.e., the ratio of the maximum load when the mine rock slope sample is fractured to the cross-sectional area perpendicular to the load direction. In the examples, the uniaxial compressive strength of the mine rock slope sample is calculated based on the fracture load and the cross-sectional area of ​​the mine rock slope sample.

number

[0088] The internal friction angle of rock is a quantitative indicator of the relationship between the positive stress on the shear plane and the internal friction force when rock is shear-fractured, and reflects the magnitude of the resistance caused by friction between particles inside the rock. The internal friction angle of rock is also an important parameter for the shear-resisting strength characteristics of rock, and its magnitude is affected by multiple factors, including the physical and structural properties of the rock. In practical applications, the internal friction angle of rock needs to be measured and analyzed based on specific circumstances.

[0089] In the embodiment, the shear stress analysis results and the principal stress analysis structure are combined to comprehensively analyze the stress distribution situation of the rocky slope.

[0090] The shear stress analysis model mainly focuses on the behavior of rock under shear action, especially on the stress distribution and failure mechanism on the shear plane. In rock slopes, shear stress is one of the important factors for assessing the stability and failure pattern of the slope.

[0091] The principal stress analysis model mainly analyzes the distribution and change of principal stress inside rock. Principal stress directly determines the strength and stability of rock. After the formation of a slope, stress redistribution will cause changes in the direction and magnitude of principal stress, especially in the area close to the free surface.

[0092] Based on the results of the analysis of shear stress and principal stress, the distribution of stress on the slope is analyzed, especially the areas where shear stress is concentrated and the change in the direction of principal stress are analyzed, and the stress distribution is adjusted and verified in consideration of the geometric shape of the rock slope and the external environmental conditions.

[0093] Furthermore, the analysis method of the slope stress distribution situation in this embodiment is only one preferred condition of this embodiment. In one or several other embodiments, the stress analysis method can be optimized based on the actual situation and stress distribution attributes of the rock slope, so as to more accurately reflect the stress state of the rock slope and improve the completeness and accuracy of the analysis results.

[0094] In step S5, the damage results of the mine rock slope under the freeze-thaw cycle are analyzed based on the displacement change situation, plastic damage situation, mine safety factor and stress distribution situation. The specific implementation steps and contents are as follows:

[0095] In this embodiment, damage analysis factors for the mine rock slope during freeze-thaw cycles are set and damage analysis results are obtained, which mainly include displacement change, plastic damage, mine safety factor, and stress distribution.

[0096] The change in displacement is an important indicator that reflects the degree of deformation of rocky slopes in mines. During the freeze-thaw cycle, rocks expand and contract due to temperature changes, which leads to displacement of the slope itself. By analyzing the displacement data at different times from key points on the surface and inside of the slope, the overall deformation trend and local deformation characteristics of the slope can be evaluated.

[0097] Plastic damage refers to permanent damage caused by the expansion and penetration of microcracks inside the rock during the process of stress. During the freeze-thaw cycle, the mechanical properties of the rock change, and plastic damage becomes more pronounced. By analyzing the distribution range, expansion rate, and damage level of the plastic zone, the internal damage development status of the mine rock slope can be understood.

[0098] The mine safety factor is a quantified index obtained based on slope stability analysis. It is used to evaluate the safety level of mine rock slopes under specific conditions. It takes into account the comprehensive influence of multiple factors such as geometric shape, rock mechanics properties, and external loads. The safety factor is calculated or adjusted during freeze-thaw cycles to reflect the change in slope stability.

[0099] Stress distribution is one of the important factors for assessing slope stability. By obtaining stress distribution data within a slope through numerical simulation and on-site monitoring, it is possible to understand information such as stress concentration areas, principal stress direction, and magnitude. Stress redistribution and changes during freeze-thaw cycles have a significant impact on the stability of mine rock slopes.

[0100] Next, the stability of the mine rocky slope is evaluated by combining the different damage analysis results of the mine rocky slope and the information from the rock freezing and thawing test.

[0101] First, constructing a comprehensive damage analysis result. First, several important damage analysis factors are integrated, including but not limited to, the change in displacement, the development of plastic damage, the change trend of the mine safety factor, and the change law of stress distribution, to analyze the damage state of the mine rock slope under different freeze-thaw cycles. The above analysis factors are interrelated and jointly affect the impact mechanism and change state of the mine rock slope under freeze-thaw action.

[0102] Second, the individual analysis and discussion of the damage analysis results. The displacement change characteristics were determined by recording and comparing the displacement data of the mine rock slopes in different freeze-thaw cycles in detail, to clarify the change trend of displacement with the increase in the number of freeze-thaw cycles, including but not limited to the displacement rate, the cumulative effect of displacement amount, and the relationship between local and overall displacement.

[0103] The plastic damage development situation can be obtained by using numerical simulation and field observation data to identify the formation, expansion path, and damage degree of the plastic area inside the mine rock slope, and the influence of freeze-thaw cycles on the rock microstructure and the action effects of different influencing factors on the microplastic damage development.

[0104] Based on the latest mechanical model and calculation method, the change trend of the mine safety factor is obtained, the safety factor of the mine rock slope under different freeze-thaw cycle conditions is directly evaluated, and the change law of the safety factor with the increase in the number of freeze-thaw cycles is obtained by comparing the safety factors under different numbers of freeze-thaw cycles.

[0105] The law of change of stress distribution is based on the analysis of the dynamic changes of stress field, and the analysis of the location of stress concentration areas, the change of principal stress direction, and the change of stress level of the rock slope in the mine during the freeze-thaw cycle. The above changes provide the analytical basis for understanding the stability of the rock slope in the mine during the freeze-thaw cycle.

[0106] 3. Stability assessment and verification: Based on the damage analysis results, combined with information from rock freeze-thaw tests, a comprehensive assessment of the stability of the mine's rocky slopes was conducted. The rock freeze-thaw test information provided direct information on the changes in the mechanical properties of rock during freeze-thaw cycles, enhancing the scientific validity and reliability of the assessment results.

[0107] Furthermore, in order to verify the accuracy of the damage analysis results of the mine rock slopes, a comparative analysis was conducted between the analysis results and past test data on rock freezing and thawing, and by comparing the similarities and differences between the two, the rationality of the analysis method and the accuracy of the analysis results were verified.

[0108] 4. Comprehensive assessment and reinforcement plan design for mine rock slopes. Based on the comparative analysis results, a comprehensive assessment of the stability of mine rock slopes was conducted, taking into consideration multiple factors such as displacement change, plastic damage, mine safety coefficients, and stress distribution. The main current problems and potential safety risks of mine rock slopes were analyzed, and corresponding reinforcement measures or improvement recommendations were proposed. A reinforcement plan for mine rock slopes was also designed. This ensures the stability of mine rock slopes, reduces potential rock safety risks, and ensures the smooth operation of mine production activities. The reinforcement plan includes increasing support structures, improving drainage systems, and adjusting mining plans. The specific reinforcement measures will vary depending on the actual conditions of the mine rock slopes and the assessment results.

[0109] This study analyzed the effects of environmental temperature fluctuations on mine rock slopes during freeze-thaw cycles, and clarified the deformation change laws, damage accumulation process, and stress state change trends of mine rock slopes under variable climatic conditions. It also conducted a comprehensive and in-depth analysis and evaluation of the stability of rock slopes in mining areas. This not only deepened our understanding of the safety of mine slopes under extreme climatic conditions, but also provided scientific basis and technical support for the design of mine rock slopes.

[0110] As shown in Figure 8, in one preferred embodiment, the present invention further provides a system for analyzing freeze-thaw damage to rocky slopes in mines, which can efficiently implement the method for analyzing freeze-thaw damage to rocky slopes in mines in accordance with the present invention. In the system for analyzing freeze-thaw damage to rocky slopes in mines, an input device, a processor, an output device, and a memory are connected to one another. The memory is used to store a computer program, which includes program instructions. The processor is configured to access the program instructions and execute specific steps of the embodiment related to the method for analyzing freeze-thaw damage to rocky slopes in mines in accordance with the present invention. The system for analyzing freeze-thaw damage to rocky slopes in mines in accordance with the present invention has a complete structure, is objective, and is stable, and can efficiently implement the method for analyzing freeze-thaw damage to rocky slopes in mines in accordance with the present invention, thereby enhancing the overall applicability and practical application of the present invention.

[0111] Finally, it should be noted that the above embodiments are used only to explain the technical solutions of the present invention and do not limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, it should be understood that those skilled in the art can modify the technical solutions described in the above embodiments or make equivalent substitutions for some or all of the technical features therein. Furthermore, these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the respective embodiments of the present invention, and all belong to the scope of the claims and specification of the present invention.

Claims

1. Selecting a mine rocky slope sample, performing a freeze-thaw cycle test on the mine rocky slope sample, and obtaining rock freeze-thaw test information; setting a displacement analysis index based on the rock freeze-thaw test information, and acquiring the displacement change status of the rock slope during freeze-thaw cycles based on the displacement analysis index; Analyzing the plastic damage status of rock slopes and mine safety factors during freeze-thaw cycles based on the rock freeze-thaw test information; constructing a stress analysis model based on the rock freeze-thaw test information, and obtaining the stress distribution status of the rock slope during freeze-thaw cycles using the stress analysis model; and analyzing the damage results of the mine rocky slope during freeze-thaw cycles by combining the displacement change situation, the plastic damage situation, the mine safety factor, and the stress distribution situation.

2. conducting a freeze-thaw cycle test on the mine rock slope sample to obtain rock freeze-thaw test information; Setting a freeze-thaw temperature range, a freeze-thaw cycle time, and a number of freeze-thaw cycles based on the characteristics of the mine rock slope sample; 2. The method for analyzing freeze-thaw damage to rocky slopes in mines according to claim 1, further comprising: conducting a freeze-thaw cycle test on a rocky slope sample in mines based on the freeze-thaw temperature range, the freeze-thaw cycle time, and the number of freeze-thaw cycles, and obtaining rock freeze-thaw test information.

3. Setting a displacement analysis index based on the rock freeze-thaw test information establishing a first analytical index including a rock mass loss rate based on the rock freeze-thaw test information; 2. The method for analyzing freeze-thaw damage to rocky slopes in mines according to claim 1, further comprising: setting a second analysis index including rock porosity based on the rock freeze-thaw test information.

4. Obtaining the displacement change status of the rocky slope during the freeze-thaw cycle based on the displacement analysis index, and analyzing the displacement change of the rock slope during freeze-thaw cycles by combining the rock mass loss rate, the rock porosity, and the rock freeze-thaw test information; The rock mass loss rate satisfies the following relationship: [Equation 1] In addition, S ｍ represents the mass loss rate of the rock, and m ０ represents the initial rock mass in the dry state, and m ｎ represents the rock mass in the dry state after n freeze-thaw cycles, The rock porosity satisfies the following relationship: [Equation 2] RS represents rock porosity, m ｎｂ represents the rock saturated mass after n freeze-thaw cycles, and m ｎ The method for analyzing freeze-thaw damage to rocky slopes in mines according to claim 3, characterized in that ρ represents the mass of the rock in a dry state after n freeze-thaw cycles, ρ represents the density of water, h represents the height of the rock, and s represents the cross-sectional area of ​​the rock.

5. Analyzing the plastic damage status of rock slopes and mine safety factors during freeze-thaw cycles based on the rock freeze-thaw test information; constructing a safety factor prediction model based on the plastic damage state and the rock freeze-thaw test information; The safety factor prediction model satisfies the following relationship: [Equation 3] In addition, A ｆ The method for analyzing freeze-thaw damage to mine rocky slopes according to claim 1, characterized in that ℓ represents the safety factor of the rocky slope, h represents the freezing depth of the rocky slope, and l represents the length of the rocky slope.

6. constructing a stress analysis model based on the rock freeze-thaw test information, constructing a shear stress analysis model based on the rock freeze-thaw test information; constructing a principal stress analysis model based on the rock freeze-thaw test information and the shear stress analysis model; The method for analyzing freeze-thaw damage to rocky slopes in mines according to claim 1, further comprising: obtaining a stress analysis model based on the shear stress analysis model and the principal stress analysis model.

7. The shear stress analysis model satisfies the following relationship: [Equation 4] The method for analyzing freeze-thaw damage to rocky slopes in mines according to claim 6, wherein γ represents the shear stress of the rock, p represents the load acting on the rock, θ represents the included angle between the rock and the horizontal ground, δ represents the friction coefficient of the shear force measuring roller, and s represents the cross-sectional area of ​​the rock.

8. The principal stress analysis model satisfies the following relationship: [Equation 5] In addition, γ ｍａｘ represents the maximum principal stress, k represents the uniaxial compressive strength of the rock, μ represents the confining pressure correlation coefficient, and γ ｍin represents the minimum principal stress, and f ｘ The method for analyzing freeze-thaw damage to rocky slopes in mines according to claim 6, wherein α represents the cohesion of the rock, and α represents the internal friction angle of the rock.

9. The damage results of the mine rock slope under the freeze-thaw cycle are analyzed by combining the displacement change situation, the plastic damage situation, the mine safety factor and the stress distribution situation. Setting damage analysis factors for the mine rocky slope in a freeze-thaw cycle and obtaining damage analysis results, the damage analysis factors including the displacement change situation, the plastic damage situation, the mine safety factor and the stress distribution situation; 2. The method for analyzing freeze-thaw damage to a rocky slope in a mine according to claim 1, further comprising evaluating the stability of the rocky slope in a mine by combining the damage analysis result and the rock freeze-thaw test information.

10. A mine rocky slope freeze-thaw damage analysis system comprising a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory being connected to each other, the memory being used to store a computer program, the computer program including program instructions, the processor being arranged to call the program instructions, and characterized in that it executes the mine rocky slope freeze-thaw damage analysis method according to any one of claims 1 to 9.

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