Method and device for correcting physical parameters of rock-soil layer of goaf

Abstract

The invention provides a method and a device for correcting physical parameters of a rock-soil layer of a goaf, and relates to the technical field of engineering surveying, the method comprises the following steps: obtaining first physical parameters of the rock-soil layer determined by an indoor soil test; second rock-soil layer physical parameters obtained through field measurement are obtained; establishing a finite element model according to the first rock-soil layer physical parameters; according to a finite element model and constraint conditions of the finite element model, analyzing the physical parameters of the first rock-soil layer to generate a first analysis result of the settlement amount of the rock-soil layer of the goaf; analyzing the physical parameters of the second rock-soil layer to generate a second analysis result of the settlement amount of the rock-soil layer of the goaf; determining a deviation ratio of the first analysis result and the second analysis result; and correcting the physical parameters of the second rock-soil layer according to the deviation rate. The method can improve the precision of the physical parameters of the rock-soil layer of the goaf under the condition of a small amount of on-site investigation data, and can provide effective and accurate reference basis for construction and development of areas near the goaf.

Description

Technical Field

[0001] The invention relates to the technical field of engineering survey, and in particular to a method and a device for correcting physical parameters of rock and soil layers in a goaf area. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. No description herein is admitted to be prior art by inclusion in this section.

[0003] The area and scope of surface deformation and damage caused by displacement, cracking, breaking and collapse due to the instability of the surrounding rock in the underground mining space, until the overlying rock layer sinks and bends as a whole, is called the goaf. As the most basic and extensive transportation infrastructure, highways are the main support for connecting various other modes of transportation and exerting the overall efficiency of the comprehensive transportation network. With the increasing shortage of land resources, the issue of land reuse above the goaf has attracted people's attention. However, when a highway is built on the goaf site, the foundation of the goaf will aggravate the ongoing settlement under the long-term action of the roadbed (pile foundation) load, and even cause the already stable goaf foundation to re-activate and deform, aggravate the foundation deformation, have a huge impact on the strength of the highway structure, and even pose a threat to personal safety. Therefore, it is crucial to conduct relevant mechanical analysis of the goaf for the construction of the upper engineering structure of the goaf.

[0004] However, when performing simulation calculations of goaf areas, the methods for determining the physical parameters of the rock and soil layers are usually: obtained through geotechnical tests, based on statistical data of similar strata, empirical data, etc. The accuracy of the parameters calculated by the above methods is not high. Using field exploration methods such as drilling to obtain the physical parameters of the rock and soil layers that completely match the geological characteristics often requires a huge workload. It takes dozens or hundreds of measurements and detection data from each point to obtain complete and accurate physical parameters of the rock and soil layers. Summary of the invention

[0005] In an embodiment of the present invention, a method for correcting the physical parameters of the rock and soil layer in a goaf is proposed, which is used to improve the accuracy of the physical parameters of the rock and soil layer in the goaf with a small amount of on-site survey data, and can provide an effective and accurate reference basis for the construction and development of the area near the goaf, including:

[0006] Obtain the physical parameters of the first rock and soil layer in the goaf determined by indoor geotechnical tests;

[0007] Obtaining physical parameters of the second rock and soil layer in the goaf obtained through on-site measurement;

[0008] A finite element model for analyzing the physical parameters of the rock and soil layer of the goaf is established according to the physical parameters of the first rock and soil layer;

[0009] Analyze the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model to generate a first analysis result of the settlement of the rock and soil layer in the goaf area;

[0010] Analyze the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf area;

[0011] determining a deviation rate between the first analysis result and the second analysis result;

[0012] The physical parameters of the second rock and soil layer are corrected according to the deviation rate.

[0013] In an embodiment of the present invention, a device for correcting the physical parameters of the rock and soil layers in a goaf is proposed, which is used to improve the accuracy of the physical parameters of the rock and soil layers in the goaf with a small amount of on-site survey data, and can provide an effective and accurate reference basis for the construction and development of the area near the goaf, including:

[0014] A first acquisition module is used to acquire physical parameters of the first rock and soil layer in the goaf determined by indoor geotechnical tests;

[0015] The second acquisition module is used to acquire the physical parameters of the second rock and soil layer in the goaf obtained by on-site measurement;

[0016] A model building module, used to build a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf according to the physical parameters of the first rock and soil layer;

[0017] A first generating module is used to analyze the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model, and generate a first analysis result of the settlement of the rock and soil layer in the goaf area;

[0018] The second generation module is used to analyze the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf area;

[0019] A deviation rate determination module, used to determine the deviation rate of the first analysis result and the second analysis result;

[0020] The correction module is used to correct the physical parameters of the second rock and soil layer according to the deviation rate.

[0021] In an embodiment of the present invention, a computer device is proposed, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a method for correcting physical parameters of rock and soil layers in a goaf is implemented.

[0022] In an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, a method for correcting physical parameters of rock and soil layers in a goaf is implemented.

[0023] A computer program product is provided in an embodiment of the present invention. The computer program product includes a computer program. When the computer program is executed by a processor, a method for correcting physical parameters of rock and soil layers in a goaf is implemented.

[0024] Compared with the geotechnical test or field survey method in the prior art, the embodiment of the present invention obtains the physical parameters of the first rock and soil layer of the goaf determined by indoor geotechnical tests; obtains the physical parameters of the second rock and soil layer of the goaf obtained by field measurement; establishes a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf according to the physical parameters of the first rock and soil layer; analyzes the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model to generate a first analysis result of the settlement of the rock and soil layer in the goaf; analyzes the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf; determines the deviation rate of the first analysis result and the second analysis result; and corrects the physical parameters of the second rock and soil layer according to the deviation rate. This can improve the accuracy of the physical parameters of the rock and soil layer in the goaf with a small amount of field survey data, and can provide an effective and accurate reference basis for the construction and development of the area near the goaf. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic flow chart of a method for correcting physical parameters of rock and soil layers in a goaf area according to an embodiment of the present invention;

[0027] Figure 2 It is a flow chart of a specific example of a method for correcting physical parameters of rock and soil layers in a goaf area according to an embodiment of the present invention;

[0028] Figure 3 is a finite element analysis result diagram of an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of a device for correcting physical parameters of rock and soil layers in a goaf according to an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0032] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0033] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0034] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0035] The present invention proposes a method for correcting the physical parameters of the rock and soil layer in the goaf area, and corrects and verifies the physical parameters of the rock and soil layer according to the data measured on site in the goaf area, thereby ensuring the authenticity and accuracy of the calculation. At the same time, it guarantees the reliability of numerical simulation calculations in the goaf area in a complex geological environment, and provides an effective reference basis for construction and development. Figure 1 FIG. 1 is a flow chart of a method for correcting physical parameters of rock and soil layers in a goaf area according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0036] Step 101, obtaining physical parameters of the first rock and soil layer of the goaf determined by indoor geotechnical tests;

[0037] Step 102, obtaining physical parameters of the second rock and soil layer in the goaf obtained through on-site measurement;

[0038] Step 103, establishing a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf according to the physical parameters of the first rock and soil layer;

[0039] Step 104, analyzing the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model, and generating a first analysis result of the settlement of the rock and soil layer in the goaf;

[0040] Step 105, analyzing the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf;

[0041] Step 106, determining the deviation rate of the first analysis result and the second analysis result;

[0042] Step 107, correcting the physical parameters of the second rock and soil layer according to the deviation rate.

[0043] Figure 2 FIG. 1 is a flow chart of a specific example of a method for correcting physical parameters of rock and soil layers in a goaf area according to an embodiment of the present invention. Figure 2 As shown, the method may include: (1) proposing a hypothesis and establishing a mathematical model for simulation analysis; (2) determining the physical parameters of the first rock and soil layer (initial basic physical and mechanical parameters) calculated by the model; (3) using relevant finite element software to perform simulation analysis; (4) obtaining analysis results and performing deviation rate calculation; (5) performing result data deviation rate judgment to determine whether it is necessary to correct the physical parameters of the second rock and soil layer; (6) using a correction formula to perform correction; (7) repeating steps (2)-(6) until the analysis results meet the data deviation rate judgment.

[0044] In one embodiment, the physical parameter of the first soil layer The physical parameters of the second rock and soil layer may include: thickness, bulk density, Poisson's ratio, elastic modulus, cohesion, and friction angle.

[0045] In one embodiment, based on the corresponding indoor geotechnical test, the initial basic physical and mechanical parameters of the model calculation are determined as shown in Table 1 below:

[0046] Table 1

[0047]

[0048] In one embodiment, a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf is established according to the physical parameters of the first rock and soil layer, including:

[0049] Under the following assumptions, a finite element model for analyzing the physical parameters of the geotechnical layer in the goaf is established based on the physical parameters of the first geotechnical layer:

[0050] The rock and soil in the goaf is an ideal elastic-plastic body;

[0051] The rock and soil in the goaf obeys the Mohr-Coulomb strength yield criterion;

[0052] Ignore the influence of groundwater and seepage in the goaf on the establishment of finite element model;

[0053] The pile foundation structural unit in the goaf is a completely elastic body, and the elastic constitutive model is adopted.

[0054] In this embodiment, the following assumptions can be firstly made: the rock and soil body is an ideal elastoplastic body and obeys the strength-yield criterion of Mohr-Coulomb; the influence of groundwater and seepage on the model is simplified; the pile foundation structural unit is a completely elastic body and an elastic constitutive model is adopted; the study area is generalized into a corresponding mathematical model, and finite element meshing is performed based on the mathematical model and the physical parameters of the first rock and soil layer of the goaf that have been determined. For example, the rock and soil layer of a goaf is generalized into a corresponding mathematical model based on the above-mentioned assumptions, and a three-dimensional model of 400m×400m×300m is established. The entity attribute control is selected, and the surface subsidence h1=1.408m that may be caused by the coal seam is obtained according to the drilling data, and the mesh is divided into 10m×40m×10m, so as to perform analysis and calculation.

[0055] In one embodiment, the constraints of the finite element model include: simulation analysis conditions, stress conditions, and given model failure criteria. According to the research area, namely the goaf, model analysis conditions such as simulation analysis conditions, stress conditions, and given model failure criteria are defined.

[0056] Figure 3 is a finite element analysis result diagram of an embodiment of the present invention, such as Figure 3 As shown, according to the finite element model and the constraints of the finite element model, the physical parameters of the first rock and soil layer are analyzed to generate the first analysis result of the settlement of the rock and soil layer in the goaf, and the displacement of each rock and soil layer is obtained by analysis.

[0057] In one embodiment, the deviation rate of the first analysis result and the second analysis result is determined by the following formula:

[0058]

[0059] Among them, P is the deviation rate, x is the first analysis result of the settlement of the rock and soil layer in the goaf area, that is, the response value obtained by simulation calculation, The second analysis result of the settlement of rock and soil layers in the goaf is the response value obtained by theoretical calculation based on the stratigraphic characteristics revealed by drilling data at a certain location in the goaf.

[0060] In one embodiment, x, Including but not limited to: displacement, settlement and other result responses.

[0061] For example, according to Figure 3 The deviation rate of the total displacement shown is calculated, and the data deviation rate threshold Q is set to 10%. The displacements of the top plate positions of the three layers are h1 = 0.428m (32.35%), h2 = 0.467m (35.30%), and h3 = 0.428m (32.35%).

[0062]

[0063]

[0064]

[0065] Therefore, parameter correction stops.

[0066] In one embodiment, the second geotechnical layer physical parameter is corrected according to the deviation rate, including:

[0067] When the deviation rate is greater than a preset deviation rate threshold, the physical parameters of the second rock and soil layer are corrected until the deviation rate is no greater than the preset deviation rate threshold.

[0068] In this embodiment, the data deviation amount is determined for the first analysis result and the second analysis result, and the specific formula is as follows:

[0069]

[0070] Wherein, Q is the data deviation rate threshold.

[0071] In this embodiment, based on the above-mentioned determination results, the simulation parameters are checked, and the specific formula is as follows:

[0072]

[0073] Wherein, i is the i-th basic physical and mechanical parameter, and k is the k-th simulation parameter verification iteration step; repeatedly execute: determine the physical parameters of the first rock and soil layer calculated by the model, use the relevant finite element analysis method to perform simulation analysis, obtain the analysis results, calculate the deviation rate, judge the deviation rate of the result data, judge whether it is necessary to correct the basic physical and mechanical parameters, use the correction formula to correct them, etc.; until the judgment result is that the deviation rate is not greater than the preset deviation rate threshold, the parameter verification and correction stops.

[0074] It should be noted that, although the operations of the method of the present invention are described in a specific order in the above embodiments and the accompanying drawings, this does not require or imply that the operations must be performed in the specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0075] The implementation of the geotechnical layer physical parameter correction device in the goaf can refer to the implementation of the above method, and the repeated parts will not be repeated. The terms "module" or "unit" used below can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0076] Based on the same inventive concept, the present invention also proposes a device for correcting the physical parameters of the rock and soil layers in the goaf, such as Figure 4 As shown, the device comprises:

[0077] The first acquisition module 401 is used to acquire the physical parameters of the first rock and soil layer in the goaf determined by the indoor geotechnical test;

[0078] The second acquisition module 402 is used to acquire physical parameters of the second rock and soil layer in the goaf obtained by on-site measurement;

[0079] A model building module 403 is used to build a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf according to the physical parameters of the first rock and soil layer;

[0080] The first generating module 404 is used to analyze the physical parameters of the first rock and soil layer according to the finite element model and the constraint conditions of the finite element model to generate a first analysis result of the settlement of the rock and soil layer in the goaf;

[0081] The second generating module 405 is used to analyze the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf;

[0082] The deviation rate determination module 406 is used to determine the deviation rate of the first analysis result and the second analysis result;

[0083] The correction module 407 is used to correct the physical parameters of the second rock and soil layer according to the deviation rate.

[0084] In one embodiment, the physical parameters of the first rock and soil layer and the physical parameters of the second rock and soil layer include: thickness, bulk density, Poisson's ratio, elastic modulus, cohesion, and friction angle, respectively.

[0085] In one embodiment, the model building module 403 is specifically used to:

[0086] Under the following conditions, a finite element model for analyzing the physical parameters of the rock and soil layers in the goaf is established according to the physical parameters of the first rock and soil layer:

[0087] The rock and soil in the goaf is an ideal elastic-plastic body;

[0088] The rock and soil in the goaf obeys the Mohr-Coulomb strength yield criterion;

[0089] The influence of groundwater and seepage in the goaf on the establishment of finite element model;

[0090] The pile foundation structural unit in the goaf is a completely elastic body, and the elastic constitutive model is adopted.

[0091] In one embodiment, the correction module 407 is specifically used to:

[0092] When the deviation rate is greater than a preset deviation rate threshold, the physical parameters of the second rock and soil layer are corrected until the deviation rate is no greater than the preset deviation rate threshold.

[0093] In one embodiment, the constraint conditions of the finite element model include: simulation analysis conditions, stress conditions, and a given model failure criterion.

[0094] It should be noted that, although several modules of the device for correcting the physical parameters of the geotechnical layer in the goaf are mentioned in the above detailed description, this division is only exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules described above can be embodied in one module. Conversely, the features and functions of one module described above can be further divided into multiple modules for embodiment.

[0095] Based on the above invention concept, Figure 5 As shown, the present invention also proposes a computer device 500, including a memory 501, a processor 502, and a computer program 503 stored in the memory 501 and executable on the processor 502, wherein the processor 502 implements the aforementioned method for correcting the physical parameters of the rock and soil layers in the goaf when executing the computer program 503.

[0096] Based on the aforementioned inventive concept, the present invention proposes a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the aforementioned method for correcting the physical parameters of the rock and soil layers in the goaf is implemented.

[0097] Based on the aforementioned inventive concept, the present invention proposes a computer program product, which includes a computer program. When the computer program is executed by a processor, a method for correcting physical parameters of rock and soil layers in a goaf is implemented.

[0098] Compared with the geotechnical test or field survey method in the prior art, the embodiment of the present invention obtains the physical parameters of the first rock and soil layer of the goaf determined by indoor geotechnical tests; obtains the physical parameters of the second rock and soil layer of the goaf obtained by field measurement; establishes a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf according to the physical parameters of the first rock and soil layer; analyzes the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model to generate a first analysis result of the settlement of the rock and soil layer in the goaf; analyzes the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf; determines the deviation rate of the first analysis result and the second analysis result; and corrects the physical parameters of the second rock and soil layer according to the deviation rate. This can improve the accuracy of the physical parameters of the rock and soil layer in the goaf with a small amount of field survey data, and can provide an effective and accurate reference basis for the construction and development of the area near the goaf.

[0099] Compared with the prior art, the method proposed in the embodiment of the present invention has the following beneficial effects:

[0100] 1. The embodiment of the present invention only requires a small amount of on-site investigation to improve the accuracy of parameter calculation.

[0101] 2. The embodiment of the present invention can perform parameter verification for different actual projects and has universality.

[0102] 3. The method proposed in the embodiment of the present invention is rigorous in theory and concise in calculation. It can be widely used in simulation calculations of actual projects and can provide an effective and accurate reference for the construction and development of areas near goafs.

[0103] 4. When the parameter selection is not sufficiently convincing, the embodiment of the present invention can select key parameters calculated from the simulation results of the field measurement data for verification and correction, thereby ensuring the authenticity and effectiveness of the parameter calculation.

[0104] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0108] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for correcting physical parameters of rock and soil layers in goaf, characterized in that: include: Obtain the physical parameters of the first rock and soil layer in the goaf determined by indoor geotechnical tests; Obtaining physical parameters of the second rock and soil layer in the goaf obtained through on-site measurement; A finite element model for analyzing the physical parameters of the rock and soil layer of the goaf is established according to the physical parameters of the first rock and soil layer; Analyze the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model to generate a first analysis result of the settlement of the rock and soil layer in the goaf area; Analyze the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf area; determining a deviation rate between the first analysis result and the second analysis result; The physical parameters of the second rock and soil layer are corrected according to the deviation rate.

2. The method according to claim 1, characterized in that The physical parameters of the first rock and soil layer and the physical parameters of the second rock and soil layer include: thickness, bulk density, Poisson's ratio, elastic modulus, cohesion, and friction angle.

3. The method according to claim 1, characterized in that A finite element model for analyzing the physical parameters of the rock and soil layers in the goaf is established based on the physical parameters of the first rock and soil layer, including: Under the following assumptions, a finite element model for analyzing the physical parameters of the geotechnical layer in the goaf is established based on the physical parameters of the first geotechnical layer: The rock and soil in the goaf is an ideal elastic-plastic body; The rock and soil in the goaf obeys the Mohr-Coulomb strength yield criterion; Ignore the influence of groundwater and seepage in the goaf on the establishment of finite element model; The pile foundation structural unit in the goaf is a completely elastic body, and the elastic constitutive model is adopted.

4. The method according to claim 1, characterized in that: The physical parameters of the second rock and soil layer are corrected according to the deviation rate, including: When the deviation rate is greater than a preset deviation rate threshold, the physical parameters of the second rock and soil layer are corrected until the deviation rate is no greater than the preset deviation rate threshold.

5. The method according to claim 1, characterized in that The constraints of the finite element model include: simulation analysis conditions, stress conditions, and given model failure criteria.

6. A device for correcting physical parameters of rock and soil layers in goaf, characterized in that: include: A first acquisition module is used to acquire physical parameters of the first rock and soil layer in the goaf determined by indoor geotechnical tests; The second acquisition module is used to acquire the physical parameters of the second rock and soil layer in the goaf obtained by on-site measurement; A model building module, used to build a finite element model for analyzing the physical parameters of the rock and soil layer of the goaf according to the physical parameters of the first rock and soil layer; A first generating module is used to analyze the physical parameters of the first rock and soil layer according to the finite element model and the constraints of the finite element model, and generate a first analysis result of the settlement of the rock and soil layer in the goaf area; The second generation module is used to analyze the physical parameters of the second rock and soil layer to generate a second analysis result of the settlement of the rock and soil layer in the goaf area; A deviation rate determination module, used to determine the deviation rate of the first analysis result and the second analysis result; The correction module is used to correct the physical parameters of the second rock and soil layer according to the deviation rate.

7. The device according to claim 6, characterized in that The physical parameters of the first rock and soil layer and the physical parameters of the second rock and soil layer include: thickness, bulk density, Poisson's ratio, elastic modulus, cohesion, and friction angle.

8. The device according to claim 6, characterized in that The model building module is specifically used to: Under the following conditions, a finite element model for analyzing the physical parameters of the rock and soil layers in the goaf is established according to the physical parameters of the first rock and soil layer: The rock and soil in the goaf is an ideal elastic-plastic body; The rock and soil in the goaf obeys the Mohr-Coulomb strength yield criterion; The influence of groundwater and seepage in the goaf on the establishment of finite element model; The pile foundation structural unit in the goaf is a completely elastic body, and the elastic constitutive model is adopted.

9. The device according to claim 6, characterized in that The correction module is specifically used for: When the deviation rate is greater than a preset deviation rate threshold, the physical parameters of the second rock and soil layer are corrected until the deviation rate is no greater than the preset deviation rate threshold.

10. The device according to claim 6, characterized in that The constraints of the finite element model include: simulation analysis conditions, stress conditions, and given model failure criteria.

11. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

13. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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