Method and system for predicting rock and soil slope stability

Abstract

The present invention relates to the technical field of rock slope stability prediction, and specifically discloses a rock slope stability prediction method and system. The rock slope stability prediction method includes: performing static stability analysis on historical data corresponding to the rock and soil properties of the rock and soil slope, and obtaining the stability change value of each rock and soil property based on time change; meshing the rock and soil slope static model of the rock and soil slope, and obtaining multiple slope units; based on the stability change value, constructing features of the rock and soil properties of multiple slope units, and obtaining a change trend graph corresponding to the rock and soil slope static model; inputting the change trend graph into the slope sliding model, and obtaining a stability trend graph corresponding to the predicted future time node of the rock and soil slope based on time change. The present application meshes the rock and soil slope static model, takes the rock and soil properties as the analysis object, and constructs features of the rock and soil properties, so as to establish a stable and good prediction model for later slope monitoring.

Description

Technical Field

[0001] The invention relates to the technical field of rock and soil slope stability prediction, and in particular to a rock and soil slope stability prediction method and system. Background Art

[0002] When predicting the stability of traditional rock and soil slopes, it is necessary to first explore and analyze the rock and soil slopes, then implant monitoring equipment, obtain a certain amount of data, and then establish a prediction model to predict the stability. The time span required is long, often taking 1-2 years, and the exploration in the early stage is based on experience and is not targeted. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a method and system for predicting rock slope stability.

[0004] According to one aspect of the present application, a method for predicting rock slope stability is provided, comprising the following steps:

[0005] Conduct static stability analysis on the historical data corresponding to the rock and soil properties of the rock and soil slope to obtain the stability change value of each rock and soil property based on time change;

[0006] Meshing the static model of the rock and soil slope to obtain a plurality of slope units;

[0007] Based on the stability change value, characteristic construction is performed on the rock and soil properties of the plurality of slope units to obtain a change trend diagram corresponding to the rock and soil slope static model;

[0008] The change trend diagram is input into the slope sliding model to obtain a stability trend diagram of at least one predicted future time node corresponding to the time-varying rock and soil slope. The slope sliding model is constructed based on historical data corresponding to the rock and soil properties collected from a slope area with the same rock and soil properties.

[0009] Furthermore, the step of performing static stability analysis on the historical data corresponding to the rock and soil mass properties of the rock and soil slope to obtain the stability change value of each rock and soil mass property based on time change includes:

[0010] extracting influencing factors of the rock and soil slope;

[0011] Based on the influencing factors, a stability factor analysis is performed on the rock and soil slope using a static stability analysis method to determine a plurality of influencing factors greater than a set threshold;

[0012] Based on the preset analysis logic rules, finite element analysis is performed on each rock and soil mass property through multiple influencing factors to determine the stability change value of each rock and soil mass property.

[0013] Furthermore, the preset analysis logic rules include:

[0014] Using the preset stability standard parameters among the plurality of influencing factors as the initial values ​​of the stability change values ​​of the rock and soil mass properties;

[0015] Setting a prediction period, and determining the analysis results of finite element analysis of each rock and soil mass property by multiple influencing factors after the end of each prediction period, and judging whether the difference between the analysis result and the initial value is within a set range; if so, using the stability change prediction value obtained from the analysis result as the initial value for prediction in the next prediction period;

[0016] It also includes a set of control instructions for setting the analysis tools used for finite element analysis and for loading control of the analysis tools.

[0017] Furthermore, the change trend diagram includes:

[0018] A single variation trend curve formed by the variation values ​​of each rock and soil mass property obtained from a single slope unit at least at two consecutive historical time nodes;

[0019] A joint change trend curve formed by the change values ​​of each rock and soil mass property obtained in at least two consecutive historical time nodes for part or all of the slope units.

[0020] Furthermore, the step of constructing characteristics of the rock and soil mass properties of the plurality of slope units based on the stability change value to obtain a change trend diagram corresponding to the rock and soil slope static model includes:

[0021] Extracting features of rock and soil properties of the plurality of slope units to obtain basic features of influencing factors corresponding to the rock and soil properties;

[0022] Constructing a single change trend curve diagram and a joint change trend curve diagram of the geotechnical slope static model according to the basic characteristics of the corresponding influencing factors;

[0023] Based on the stability change value, a change trend diagram of the geotechnical slope static model is constructed by preset analysis logic rules.

[0024] Furthermore, the step of inputting the change trend diagram into the slope sliding model to obtain the predicted future time node stability trend diagram corresponding to the time-varying rock and soil slope includes:

[0025] The single change trend curve graph, the combined change trend curve graph and the change trend graph are input into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the time-varying rock and soil slope.

[0026] Furthermore, the combined change trend curve graph is obtained according to the following method:

[0027] Obtaining the position code of the slope unit corresponding to the geotechnical slope static model set during the division process;

[0028] Slope unit distribution information is constructed based on the stability change value of each slope unit and the corresponding position code, and a single change trend curve graph is constructed based on the slope unit distribution information;

[0029] According to the position coding, a plurality of single change trend curve graphs with continuous position coding are fused to obtain a joint change trend curve graph.

[0030] Furthermore, the slope sliding model is constructed according to the following method:

[0031] Obtaining historical data of factors affecting the properties of the rock and soil mass of the rock and soil slope, dividing the historical data into a number of data blocks according to preset time nodes, and performing static stability analysis on each data block according to the sequence of the preset time nodes to obtain a stability change value of each rock and soil mass property based on time change;

[0032] Meshing the static model of the rock and soil slope to obtain a plurality of slope units;

[0033] Based on the stability change value, a single change trend curve graph formed by the change value of each rock and soil mass property obtained by a single slope unit in at least two consecutive historical time nodes; and a joint change trend curve graph formed by the change value of each rock and soil mass property obtained by some or all slope units in at least two consecutive historical time nodes;

[0034] The single change trend curve graph and the combined change trend curve graph are input into a basic prediction model composed of historical data for training to obtain a slope sliding model.

[0035] The present invention also provides a rock slope stability prediction system, comprising:

[0036] The stability factor analysis module is used to perform static stability analysis on the historical data of the rock and soil properties of the rock and soil slope and obtain the stability change value of each rock and soil property;

[0037] A grid division module is used to grid the static model of the rock and soil slope to obtain a plurality of slope units;

[0038] A feature construction module, used for constructing features of rock and soil properties of a plurality of the slope units based on the stability change value, and obtaining a change trend diagram corresponding to the static model of the rock and soil slope;

[0039] The prediction module is used to input the change trend diagram into the slope sliding model to obtain the predicted future time node stability trend diagram corresponding to the time-varying rock and soil slope, and the slope sliding model is constructed based on historical data.

[0040] The beneficial effects of this application are:

[0041] The present application first performs a static stability analysis on the rock and soil properties of a rock and soil slope to obtain a stability change value of each rock and soil property; then, the rock and soil static model of the rock and soil slope is gridded to obtain a plurality of slope units; then, based on the stability change values, feature construction is performed on the rock and soil properties of the plurality of slope units to obtain a change trend graph corresponding to the static model of the rock and soil slope; finally, the change trend graph is input into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the rock and soil slope based on time changes, and the slope sliding model is constructed based on historical data.

[0042] Since the present application performs grid division on the static model of the entire rock and soil slope, takes the rock and soil properties in each slope unit as the analysis object, and performs basic feature analysis by using the slope sliding model constructed using historical data, a stable and good prediction model can be established for subsequent slope monitoring. Based on the corresponding data collection of the influencing factors affecting the slope, the collected data is compared and analyzed with the data obtained by the prediction model, and the prediction model can be corrected. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a flow chart of the method of the present invention;

[0044] Figure 2 A flow chart of a method for obtaining a stability change value of each rock and soil mass property in the present invention;

[0045] Figure 3 A flow chart of a method for obtaining a change trend diagram corresponding to the static model of the rock and soil slope in the present invention;

[0046] Figure 4 A flow chart of a method for obtaining a joint change trend curve diagram in the present invention;

[0047] Figure 5 This is a flow chart of the method for constructing the slope sliding model in the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Reference Figures 1 to 5 , the present application designs a method for predicting the stability of rock and soil slopes during long-term monitoring of rock and soil slopes in the later stage of exploration based on historical data during the exploration process. During the exploration process, accurate stability factor analysis results are crucial to whether the properties of the rock and soil mass can be preliminarily and effectively predicted based on the prediction model constructed based on historical data. It helps to guide the implantation of monitoring equipment into rock and soil slopes during the exploration process and improve the effectiveness of the implantation of monitoring equipment. The problem of a large amount of manual repeated detection during the implantation of monitoring equipment is avoided. Since there is a lack of key information on the rock and soil mass properties of the rock and soil slope before exploration, another purpose of the present application is to provide a basic version of the prediction model to make a preliminary prediction of the rock and soil slope, rather than a targeted prediction. Of course, the prediction model can be enriched according to the data obtained during the long-term monitoring of different rock and soil slopes and the results obtained from the exploration, so that the prediction model can better have the effectiveness of predicting different rock and soil slopes.

[0050] It should also be noted that the reason why the present application can guide the preliminary exploration process and the equipment implantation process through the basic version of the prediction model is closely related to the similarity of the rock and soil properties of the rock and soil slope. Generally speaking, the rock and soil properties include basic properties and external properties; among them, the basic properties are the composition of the rock and soil slope. The rock and soil slope is mainly composed of three parts: angular gravel, strongly wind-eroded sandstone and mudstone, and marl. The structure is relatively loose and the joints and fissures are well developed. There are also some embedded structures of relatively weak soil layers; in addition to the above factors, it also includes the slope and slope morphology of the rock and soil slope, as well as the surrounding environment of the slope; the external properties mainly include climatic conditions.

[0051] Therefore, as long as the influencing factors of the geotechnical slope can be preliminarily identified, the influencing factors included in the set prediction model can be revised and preliminary use can be made.

[0052] Based on this, the present invention provides a method for predicting rock slope stability, including the following steps:

[0053] Conduct static stability analysis on the historical data corresponding to the rock and soil properties of the rock and soil slope to obtain the stability change value of each rock and soil property based on time change;

[0054] Meshing the static model of the rock and soil slope to obtain a plurality of slope units;

[0055] Based on the stability change value, characteristic construction is performed on the rock and soil properties of the plurality of slope units to obtain a change trend diagram corresponding to the rock and soil slope static model;

[0056] The change trend diagram is input into the slope sliding model to obtain a stability trend diagram of at least one predicted future time node corresponding to the time-varying rock and soil slope. The slope sliding model is constructed based on historical data corresponding to the rock and soil properties collected from a slope area with the same rock and soil properties.

[0057] Furthermore, the step of performing static stability analysis on the rock and soil mass properties of the rock and soil slope to obtain the stability change value of each rock and soil mass property includes:

[0058] extracting influencing factors of the rock and soil slope;

[0059] Based on the influencing factors, a stability factor analysis is performed on the rock and soil slope using a static stability analysis method to determine a plurality of influencing factors greater than a set threshold;

[0060] Based on the preset analysis logic rules, finite element analysis is performed on each rock and soil mass property through multiple influencing factors to determine the stability change value of each rock and soil mass property.

[0061] Furthermore, the preset analysis logic rules include:

[0062] Using the preset stability standard parameters among the plurality of influencing factors as the initial values ​​of the stability change values ​​of the rock and soil mass properties;

[0063] Setting a prediction period, and determining the analysis results of finite element analysis of each rock and soil mass property by multiple influencing factors after the end of each prediction period, and judging whether the difference between the analysis result and the initial value is within a set range; if so, using the stability change prediction value obtained from the analysis result as the initial value for prediction in the next prediction period;

[0064] It also includes a set of control instructions for setting the analysis tools used for finite element analysis and for loading control of the analysis tools.

[0065] Furthermore, the change trend diagram includes:

[0066] A single variation trend curve formed by the variation values ​​of each rock and soil mass property obtained from a single slope unit at least at two consecutive historical time nodes;

[0067] A joint change trend curve formed by the change values ​​of each rock and soil mass property obtained in at least two consecutive historical time nodes for part or all of the slope units.

[0068] Furthermore, the step of constructing characteristics of the rock and soil mass properties of the plurality of slope units based on the stability change value to obtain a change trend diagram corresponding to the rock and soil slope static model includes:

[0069] Extracting features of rock and soil properties of the plurality of slope units to obtain basic features of influencing factors corresponding to the rock and soil properties;

[0070] Constructing a single change trend curve diagram and a joint change trend curve diagram of the geotechnical slope static model according to the basic characteristics of the corresponding influencing factors;

[0071] Based on the stability change value, a change trend diagram of the geotechnical slope static model is constructed by preset analysis logic rules.

[0072] Furthermore, the step of inputting the change trend diagram into the slope sliding model to obtain the predicted future time node stability trend diagram corresponding to the time-varying rock and soil slope includes:

[0073] The single change trend curve graph, the combined change trend curve graph and the change trend graph are input into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the time-varying rock and soil slope.

[0074] Furthermore, the combined change trend curve graph is obtained according to the following method:

[0075] Obtaining the position code of the slope unit corresponding to the geotechnical slope static model set during the division process;

[0076] Slope unit distribution information is constructed based on the stability change value of each slope unit and the corresponding position code, and a single change trend curve graph is constructed based on the slope unit distribution information;

[0077] According to the position coding, a plurality of single change trend curve graphs with continuous position coding are fused to obtain a joint change trend curve graph.

[0078] Furthermore, the slope sliding model is constructed according to the following method:

[0079] Obtaining historical data of factors affecting the properties of the rock and soil mass of the rock and soil slope, dividing the historical data into a number of data blocks according to preset time nodes, and performing static stability analysis on each data block according to the sequence of the preset time nodes to obtain a stability change value of each rock and soil mass property based on time change;

[0080] Meshing the static model of the rock and soil slope to obtain a plurality of slope units;

[0081] Based on the stability change value, a single change trend curve graph formed by the change value of each rock and soil mass property obtained by a single slope unit in at least two consecutive historical time nodes; and a joint change trend curve graph formed by the change value of each rock and soil mass property obtained by some or all slope units in at least two consecutive historical time nodes;

[0082] The single change trend curve graph and the combined change trend curve graph are input into a basic prediction model composed of historical data for training to obtain a slope sliding model.

[0083] The present invention also provides a rock slope stability prediction system, comprising:

[0084] The stability factor analysis module is used to perform static stability analysis on the historical data of the rock and soil properties of the rock and soil slope and obtain the stability change value of each rock and soil property;

[0085] A grid division module is used to grid the static model of the rock and soil slope to obtain a plurality of slope units;

[0086] A feature construction module, used for constructing features of rock and soil properties of a plurality of the slope units based on the stability change value, and obtaining a change trend diagram corresponding to the static model of the rock and soil slope;

[0087] The prediction module is used to input the change trend diagram into the slope sliding model to obtain the predicted future time node stability trend diagram corresponding to the time-varying rock and soil slope, and the slope sliding model is constructed based on historical data.

[0088] The present application first performs a static stability analysis on the rock and soil properties of a rock and soil slope to obtain a stability change value of each rock and soil property; then, the rock and soil static model of the rock and soil slope is gridded to obtain a plurality of slope units; then, based on the stability change values, feature construction is performed on the rock and soil properties of the plurality of slope units to obtain a change trend graph corresponding to the static model of the rock and soil slope; finally, the change trend graph is input into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the rock and soil slope based on time changes, and the slope sliding model is constructed based on historical data.

[0089] Since the present application performs grid division on the static model of the entire rock and soil slope, takes the rock and soil properties in each slope unit as the analysis object, and performs basic feature analysis by using the slope sliding model constructed using historical data, a stable and good prediction model can be established for subsequent slope monitoring, and based on the corresponding data collection of the influencing factors affecting the slope, the collected data is compared and analyzed with the data obtained by the prediction model, and the prediction model can be corrected.

[0090] When constructing the characteristics of the rock and soil properties of multiple slope units, a multi-layer perceptron (MLP) network is used to extract features to determine whether the factors affecting the rock and soil properties are key factors, guide targeted sampling of slope units at different locations during the exploration process, and analyze the main components of the rock and soil properties in the samples.

[0091] In the above, when the multi-layer perceptron (MLP) network is used for feature extraction, an attention mechanism consisting of basic properties and external properties is added to the multi-layer perceptron (MLP) network; different influencing factors can be effectively extracted. At the same time, in the attention mechanism, a set threshold for standard judgment is set for each influencing factor. The purpose is to compare the extracted influencing factor with the corresponding set threshold to determine whether the influencing factor is a key factor.

[0092] It can be understood that the stability change value refers to the main influencing factors contained in the properties of the rock and soil mass in the rock and soil slope monitoring, which is obtained by analyzing the basic data formed during the exploration process. It represents the initial state value of the influencing factors contained in the rock and soil properties of the rock and soil slope before the rock and soil slope monitoring.

[0093] It is understandable that the slope unit is a plurality of regions obtained by meshing the static model of the rock and soil slope according to a certain division rule, and each region contains a plurality of rock and soil properties. The grid division standard can be performed in units of 3m×3m, or can be set according to actual conditions, and this embodiment does not limit this.

[0094] Specifically, the entire map is divided into slope units, and based on the stability change value, the rock and soil properties of the multiple slope units are characterized to obtain a change trend diagram corresponding to the static model of the rock and soil slope.

[0095] It should be noted that the slope sliding model is a prediction model required for long-term monitoring of the rock and soil slope in the later stage of exploration during the exploration process. The change trend diagram is input into the model, and the predicted stability trend diagram can be output.

[0096] It should also be noted that the slope sliding model can be constructed based on historical data. For the selection of historical data, a multi-layer perceptron (MLP) network can be selected in this application, which is composed of an input layer, a hidden layer, and an output layer.

[0097] The multi-layer perceptron (MLP) network used in this application includes several convolution blocks, such as 3x3 convolution blocks; each convolution block corresponds to a slope unit, and the geotechnical slope is actually composed of the above-mentioned different numbers of convolution blocks, and then the output of each branch is spliced ​​to form a more complex feature map. For ease of understanding, the static stability analysis and grid division of the geotechnical properties of the geotechnical slope static model of the geotechnical slope before exploration can be performed first, and the slope unit distribution information is constructed based on the stability change value and corresponding position code of each slope unit, and a single change trend curve diagram is constructed based on the slope unit distribution information; according to the position code, the obtained multiple single change trend curve diagrams with continuous position codes are fused to obtain a joint change trend curve diagram. The single change trend curve diagram and the joint change trend curve diagram are respectively input into the above-mentioned convolution blocks for training, and the stability trend diagram is output.

[0098] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for predicting rock and soil slope stability, characterized in that: The steps include: Conduct static stability analysis on the historical data corresponding to the rock and soil properties of the rock and soil slope to obtain the stability change value of each rock and soil property based on time change; Meshing the static model of the rock and soil slope to obtain a plurality of slope units; Based on the stability change value, characteristic construction is performed on the rock and soil properties of the plurality of slope units to obtain a change trend diagram corresponding to the rock and soil slope static model; Inputting the change trend graph into a slope sliding model to obtain a stability trend graph of at least one predicted future time node corresponding to the time-varying rock and soil slope, wherein the slope sliding model is constructed based on historical data corresponding to rock and soil properties collected from a slope area with the same rock and soil properties; The step of obtaining a change trend diagram corresponding to the static model of the rock and soil slope comprises: Extracting features of rock and soil properties of the plurality of slope units to obtain basic features of influencing factors corresponding to the rock and soil properties; Constructing a single change trend curve diagram and a joint change trend curve diagram of the geotechnical slope static model according to the basic characteristics of the corresponding influencing factors; Based on the stability change value, constructing a change trend diagram of the geotechnical slope static model through preset analysis logic rules; A single variation trend curve formed by the variation values ​​of each rock and soil mass property obtained from a single slope unit at least at two consecutive historical time nodes; A joint change trend curve formed by the change values ​​of each rock and soil mass property obtained in at least two consecutive historical time nodes for some or all slope units; The single change trend curve graph, the combined change trend curve graph and the change trend graph are input into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the time-varying rock and soil slope.

2. The method for predicting rock slope stability according to claim 1, characterized in that: The step of performing static stability analysis on the historical data corresponding to the rock and soil mass properties of the rock and soil slope to obtain the stability change value of each rock and soil mass property based on time change includes: extracting influencing factors of the rock and soil slope; Based on the influencing factors, a stability factor analysis is performed on the rock and soil slope using a static stability analysis method to determine a plurality of influencing factors greater than a set threshold; Based on the preset analysis logic rules, finite element analysis is performed on each rock and soil mass property through multiple influencing factors to determine the stability change value of each rock and soil mass property.

3. The method for predicting rock slope stability according to claim 2, characterized in that: The preset analysis logic rules include: Using the preset stability standard parameters among the plurality of influencing factors as the initial values ​​of the stability change values ​​of the rock and soil mass properties; Setting a prediction period, and determining the analysis results of finite element analysis of each rock and soil mass property by multiple influencing factors after the end of each prediction period, and judging whether the difference between the analysis result and the initial value is within a set range; if so, using the stability change prediction value obtained from the analysis result as the initial value for prediction in the next prediction period; It also includes a set of control instructions for setting the analysis tools used for finite element analysis and for loading control of the analysis tools.

4. The method for predicting rock slope stability according to claim 1, characterized in that: The combined change trend curve graph is obtained according to the following method: Obtaining the position code of the slope unit corresponding to the geotechnical slope static model set during the division process; Slope unit distribution information is constructed based on the stability change value of each slope unit and the corresponding position code, and a single change trend curve graph is constructed based on the slope unit distribution information; According to the position coding, a plurality of single change trend curve graphs with continuous position coding are fused to obtain a joint change trend curve graph.

5. The method for predicting rock slope stability according to claim 1, characterized in that: The slope sliding model is constructed as follows: Obtaining historical data of factors affecting the properties of the rock and soil mass of the rock and soil slope, dividing the historical data into a number of data blocks according to preset time nodes, and performing static stability analysis on each data block according to the sequence of the preset time nodes to obtain a stability change value of each rock and soil mass property based on time change; Meshing the static model of the rock and soil slope to obtain a plurality of slope units; Based on the stability change value, a single change trend curve graph formed by the change value of each rock and soil mass property obtained by a single slope unit in at least two consecutive historical time nodes; and a joint change trend curve graph formed by the change value of each rock and soil mass property obtained by some or all slope units in at least two consecutive historical time nodes; The single change trend curve graph and the combined change trend curve graph are input into a basic prediction model composed of historical data for training to obtain a slope sliding model.

6. A rock slope stability prediction system, characterized in that: include: The stability factor analysis module is used to perform static stability analysis on the historical data of the rock and soil properties of the rock and soil slope and obtain the stability change value of each rock and soil property; A grid division module is used to grid the static model of the rock and soil slope to obtain a plurality of slope units; A feature construction module, used for constructing features of rock and soil properties of a plurality of the slope units based on the stability change value, and obtaining a change trend diagram corresponding to the static model of the rock and soil slope; A prediction module, used for inputting the change trend graph into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the time-varying rock and soil slope, wherein the slope sliding model is constructed based on historical data; The step of obtaining a change trend diagram corresponding to the static model of the rock and soil slope comprises: Extracting features of rock and soil properties of the plurality of slope units to obtain basic features of influencing factors corresponding to the rock and soil properties; Constructing a single change trend curve diagram and a joint change trend curve diagram of the geotechnical slope static model according to the basic characteristics of the corresponding influencing factors; Based on the stability change value, constructing a change trend diagram of the geotechnical slope static model through preset analysis logic rules; A single variation trend curve formed by the variation values ​​of each rock and soil mass property obtained from a single slope unit at least at two consecutive historical time nodes; A joint change trend curve formed by the change values ​​of each rock and soil mass property obtained in at least two consecutive historical time nodes for some or all slope units; The single change trend curve graph, the combined change trend curve graph and the change trend graph are input into a slope sliding model to obtain a predicted future time node stability trend graph corresponding to the time-varying rock and soil slope.

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