A method, equipment, medium and product for simulating shaft boring machine construction.

Abstract

The present application discloses a method, equipment, medium and product for simulating the construction of a shaft boring machine, and relates to the field of construction simulation. The method comprises: constructing a construction simulation numerical model using a finite element numerical simulation platform; setting interaction simulation parameters, boundary conditions and initial states of the construction simulation numerical model; simulating the excavation process of the boring machine advancing in sections along the axial direction at a set advancing distance in the construction simulation numerical model after the parameter setting; constructing a support structure model on the surrounding rock contact surface exposed by the current advancing section according to the current support scheme at the end of each advancing section; simulating the support effect of the support structure according to the support structure model at the end of each advancing section to obtain a simulation result; the simulation result is used to determine the safety factor of the construction process; the safety factor is used to optimize the current support scheme. The present application can simply and accurately realize the simulation of the construction process, thereby optimizing the construction scheme.

Description

Technical Field

[0001] The present application relates to the field of construction simulation, and in particular to a method, equipment, medium and product for simulating the construction of a shaft boring machine. Background Art

[0002] Vertical shaft engineering is an important part of mine construction, and it is also the primary and key project for deep resource development and underground space utilization. Deep vertical shaft construction is an important direction of deep earth science research. The vertical shaft full-section tunneling machine (Shaft Boring Machine, SBM) is regarded as the key development direction of deep and large vertical shaft construction because of its ability to realize multi-process parallel construction, large shaft diameter, high construction efficiency, high degree of mechanization, and attention to environmental protection and safety. However, with the deepening of vertical shaft engineering, well construction conditions such as high ground stress, high ground temperature and complex geological structure have become increasingly prominent, and nonlinear instability damage such as layer cracking, buckling, rock burst, large deformation of soft broken surrounding rock and brittle ductile deformation have increased significantly. The stability control and maintenance of the surrounding rock of deep vertical shafts face severe challenges.

[0003] Soft rock formations, due to their special mechanical properties and geological structural characteristics, become extremely challenging geological environments during deep shaft excavation. Such rock formations usually have low strength, poor integrity, high porosity, and significant rheology, which makes them prone to deformation, rupture, and even instability under stress, increasing the difficulty of shaft excavation and support. Therefore, it is extremely important to optimize the construction plan and predict possible problems.

[0004] In order to optimize the construction plan, the construction process is usually simulated. The current construction simulation method is usually affected by the accuracy and applicability of the established model. If the model is inaccurate or oversimplified, it may affect the reliability of the results. Therefore, the current simulation method is cumbersome and the simulation accuracy is not high. Summary of the invention

[0005] The purpose of this application is to provide a shaft boring machine construction simulation method, equipment, medium and product, which can simply and accurately simulate the construction process, thereby optimizing the construction plan.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a shaft boring machine construction simulation method, comprising:

[0008] A finite element numerical simulation platform is used to construct a construction simulation numerical model; the construction simulation numerical model includes: a tunneling part model of a tunnel boring machine, a three-dimensional model of surrounding rock, and a constitutive model of surrounding rock materials;

[0009] Setting interaction simulation parameters, boundary conditions and initial states of the construction simulation numerical model to obtain a construction simulation numerical model after parameter setting;

[0010] In the construction simulation numerical model after parameter setting, the tunneling process of the tunnel boring machine advancing in sections along the axial direction at a set advancing distance is simulated; at the beginning of each section of advancement, a load equal to the actual tunneling thrust is applied to the excavation front;

[0011] In the process of simulating the tunneling process, at the end of each advancement section, a support structure model is constructed on the surrounding rock contact surface exposed in the current advancement section according to the current support scheme;

[0012] In the process of simulating the excavation process, at the end of each advancement, the support effect of the support structure is simulated according to the support structure model to obtain simulation results; the simulation results include: contact pressure between the support structure and the surrounding rock, relative displacement changes between the support structure and the surrounding rock, and stress distribution of the support structure; the simulation results are used to determine the safety factor of the construction process; the safety factor is used to optimize the current support plan.

[0013] Optionally, a finite element numerical simulation platform is used to construct a construction simulation numerical model, specifically including:

[0014] According to the actual data of the tunneling part of the tunneling machine, the tunneling part model of the tunneling machine is constructed using the built-in meshing model in the FLAC3D software; the actual data includes: actual equipment size, shape and weight;

[0015] Based on the geological survey data, a three-dimensional model of the surrounding rock is constructed using the grid division model built into the FLAC3D software; the geological survey data includes: rock layer type, rock layer thickness and rock layer physical and mechanical properties;

[0016] The Mohr-Coulomb constitutive model in FLAC3D software is used as the constitutive model of surrounding rock materials.

[0017] Optionally, setting interaction simulation parameters, boundary conditions and initial states of the construction simulation numerical model specifically includes:

[0018] Simulating the interaction between the supporting structure and the surrounding rock, and defining interaction simulation parameters; the interaction simulation parameters include: normal contact force of the contact surface between the supporting structure and the surrounding rock, tangential contact force of the contact surface between the supporting structure and the surrounding rock, friction coefficient of the contact surface between the supporting structure and the surrounding rock, and relative displacement between the supporting structure and the surrounding rock;

[0019] Setting boundary conditions of the construction simulation numerical model; the boundary conditions include: fixed boundary, displacement boundary and load boundary;

[0020] The ground stress distribution of the construction simulation numerical model is initialized according to the geological survey data, and the initial displacement of the construction simulation numerical model is set to zero, thereby completing the setting of the initial state.

[0021] Optionally, in the construction simulation numerical model after parameter setting, the tunneling process of the tunnel boring machine advancing step by step along the axial direction at a set advancing distance is simulated, specifically including:

[0022] In the construction simulation numerical model after parameter setting, select the area to be excavated;

[0023] In the area to be excavated, the empty cell technology is used to simulate the excavation process of the tunnel boring machine advancing step by step along the axial direction at a set advancing distance.

[0024] Optionally, during the simulation of the tunneling process, at the end of each advancement section, a support structure model is constructed on the surrounding rock contact surface exposed by the current advancement section according to the current support scheme, specifically including:

[0025] If the support structure in the current support scheme is in the form of a concrete shaft wall, in the process of simulating the excavation process, at the end of each advancement section, the built-in shell element in the FLAC3D software is used to simulate the geometric shape and mechanical properties of the concrete shaft wall to obtain the support structure model on the surrounding rock contact surface exposed in the current advancement section;

[0026] If the support structure in the current support scheme is in the form of anchor rods, then in the process of simulating the excavation process, at the end of each section of advancement, the built-in anchor cable unit in the FLAC3D software is used to simulate the length, diameter and prestress of the anchor rods to obtain the support structure model on the surrounding rock contact surface exposed by the current advancement section.

[0027] Optionally, the shaft boring machine construction simulation method further includes:

[0028] Calculate the maximum principal stress of the support structure based on the stress distribution of the support structure in the simulation results;

[0029] The safety factor of the construction process is calculated based on the maximum principal stress and the axial compressive strength of the supporting structure.

[0030] Optionally, the shaft boring machine construction simulation method further includes:

[0031] When the safety factor is less than or equal to the set value, the current support timing, support parameters and support structure are adjusted to optimize the current support scheme;

[0032] When the safety factor is greater than the set value, the current support plan is maintained.

[0033] In a second aspect, the present application provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned shaft boring machine construction simulation method.

[0034] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the above-mentioned shaft boring machine construction simulation method when executed by a processor.

[0035] In a fourth aspect, the present application provides a computer program product, including a computer program, which implements the above-mentioned shaft boring machine construction simulation method when executed by a processor.

[0036] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0037] The present application provides a method, equipment, medium and product for simulating the construction of a shaft boring machine. Based on a construction simulation numerical model constructed using a finite element numerical simulation platform, the method simulates the excavation process of the boring machine advancing step by step along the axial direction at a set advancement distance, and simulates the support effect of the support structure at the end of each advancement. The present application adopts the numerical simulation technology of the finite element numerical simulation platform, which can achieve meticulous simulation of the entire construction process and simply and accurately simulate the construction process. The simulation results can be used to determine the safety factor of the construction process, providing strong theoretical support for construction process optimization and safety risk control. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a flow chart of a shaft boring machine construction simulation method in one embodiment of the present application;

[0040] Figure 2 A schematic diagram of modeling results of a shaft engineering site provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of a construction simulation numerical model provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0045] like Figure 1 As shown, the shaft boring machine construction simulation method provided in the embodiment of the present application includes the following steps 101 to 105. Among them:

[0046] Step 101, using a finite element numerical simulation platform to construct a construction simulation numerical model; the construction simulation numerical model includes: a tunneling part model of a roadheader, a three-dimensional model of surrounding rock, and a constitutive model of surrounding rock materials.

[0047] Step 102, setting interaction simulation parameters, boundary conditions and initial states of the construction simulation numerical model to obtain a construction simulation numerical model after parameter setting.

[0048] Step 103, in the construction simulation numerical model after parameter setting, simulate the tunneling process of the tunnel boring machine advancing step by step along the axial direction at a set advancing distance.

[0049] At the beginning of each advancement, a load equal to the actual excavation thrust is applied at the excavation front.

[0050] Step 104, during the simulation of the tunneling process, at the end of each advancement section, a support structure model is constructed on the surrounding rock contact surface exposed by the current advancement section according to the current support scheme.

[0051] Step 105, in the process of simulating the excavation process, at the end of each advancement, the support effect of the support structure is simulated according to the support structure model to obtain a simulation result; the simulation result is used to determine the safety factor of the construction process; the safety factor is used to optimize the current support scheme.

[0052] The simulation results include: the contact pressure between the supporting structure and the surrounding rock, the relative displacement change between the supporting structure and the surrounding rock, and the stress distribution of the supporting structure.

[0053] By implementing the above steps 101 to 105, the construction process can be simulated simply and accurately, thereby optimizing the construction plan.

[0054] In another exemplary embodiment of the present application, step 101 specifically includes:

[0055] (1) Modeling the vertical shaft engineering site. Based on the actual data of the tunneling part of the tunnel boring machine, the mesh division model built in the FLAC3D software is used to build the tunneling part model of the tunnel boring machine; based on the geological survey data, the mesh division model built in the FLAC3D software is used to build a three-dimensional model of the surrounding rock. The actual data includes: actual equipment size, shape and weight, etc. The geological survey data includes: rock layer type, rock layer thickness and rock layer physical and mechanical properties, etc. The tunneling part of the tunnel boring machine can be the cutterhead of the tunnel boring machine. The modeling results of the vertical shaft engineering site are as follows: Figure 2 As shown, Figure 2 A represents the concrete shaft wall (permanent support), B represents the empty section (temporary support), and C represents the advancement working face.

[0056] In this step, the built-in meshing model in the FLAC3D software is used to independently construct the tunneling part model of the roadheader and the three-dimensional model of the surrounding rock, realizing the accurate modeling of the roadheader and the refined meshing of the surrounding rock.

[0057] (2) The Mohr-Coulomb constitutive model in FLAC3D software is used as the constitutive model of surrounding rock materials.

[0058] In view of the characteristics of weak rock formations, this step uses the Mohr-Coulomb constitutive model to describe the stress-strain relationship and failure behavior of the surrounding rock. This model can effectively simulate the nonlinear characteristics of rock during shear failure (including elastic-plastic transformation, strength reduction, and friction properties after failure).

[0059] In another exemplary embodiment of the present application, step 102 specifically includes:

[0060] (1) Simulating the interaction between the supporting structure and the surrounding rock, and defining interaction simulation parameters; the interaction simulation parameters include: the normal contact force of the contact surface between the supporting structure and the surrounding rock, the tangential contact force of the contact surface between the supporting structure and the surrounding rock, the friction coefficient of the contact surface between the supporting structure and the surrounding rock, and the relative displacement between the supporting structure and the surrounding rock.

[0061] In order to accurately reflect the interaction effect between the support structure (such as anchors, concrete shaft walls, etc.) and the surrounding rock, this step uses the built-in Interface contact surface unit in the FLAC3D software to define the interaction simulation parameters to simulate the adhesion, friction, separation and energy dissipation process between the support structure and the surrounding rock.

[0062] (2) According to the on-site geological conditions (stratum lithology and geostress conditions) and engineering constraints, appropriate boundary conditions are applied to the construction simulation numerical model to simulate the constraint environment in the actual project. The boundary conditions include: fixed boundary, displacement boundary and load boundary, etc. At the same time, the geostress distribution of the construction simulation numerical model is initialized according to the geological survey data to ensure that the simulated geostress field is consistent with the actual geological background. Finally, the initial displacement of the construction simulation numerical model is set to zero to ensure that the calculation starts from a known and stable initial state, thereby completing the setting of boundary conditions and initial states.

[0063] In another exemplary embodiment of the present application, step 103 specifically includes:

[0064] In the construction simulation numerical model after parameter setting, select the area to be excavated; in the area to be excavated, use the void cell (Void) technology to simulate the excavation process of the tunnel boring machine advancing step by step along the axial direction at a set advancement distance. The simulation of the shaft excavation process in this step can be described as follows:

[0065] (1) Selection of excavation range and simulation using empty cell technology: In the construction simulation numerical model after parameter setting, a specific cross-section of surrounding rock is selected as the area to be excavated. For example, if the simulation results of a burial depth of 1,000 meters are to be studied, the model section representing the depth is intercepted for displacement and stress contour analysis. The empty cell technology is used to simulate the actual excavation operation, that is, the rock material properties are removed at the corresponding position to form a virtual excavation space to simulate the process of the tunnel boring machine cutting the rock.

[0066] (2) TBM advancement simulation: Assume that the TBM cutterhead has no diameter expansion effect and only consider its axial advancement. Set the contact interface parameters on the surface of the surrounding rock to be excavated (for example, the simulated thrust of the TBM on the advancing working surface) to simulate the interaction between the TBM cutterhead and the surrounding rock. During the simulation, the TBM advances in sections along the axial direction, and the advancement distance each time is set to 1m to match the working mode of the TBM in actual construction.

[0067] (3) Excavation load application and status update: At the moment of simulated excavation, a load equivalent to the actual excavation thrust is applied to the excavation front (i.e., the tunnel face) to simulate the impact of the excavation force on the surrounding rock and monitor the changes in stress and deformation during the calculation stage. Before completing the current excavation cycle and entering the next cycle, the excavation front thrust loaded in the previous round is cleared in time to update the calculation status and ensure the consistency and accuracy of the simulation.

[0068] In another exemplary embodiment of the present application, step 104 specifically includes:

[0069] (1) If the support structure in the current support scheme is in the form of a concrete shaft wall, then in the process of simulating the excavation process, at the end of each advancement section, the built-in shell unit in the FLAC3D software is used, and the Fish language (numerical simulation programming language) programming function of the FLAC3D software is used to simulate the geometric shape and mechanical properties of the concrete shaft wall to obtain the support structure model on the surrounding rock contact surface exposed in the current advancement section.

[0070] (2) If the support structure in the current support scheme is in the form of anchor rods, then in the process of simulating the excavation process, at the end of each advancement section, the built-in anchor cable unit in the FLAC3D software is used to simulate the length, diameter and prestress of the anchor rod using the Fish language programming function of the FLAC3D software to obtain the support structure model on the surrounding rock contact surface exposed by the current advancement section to simulate the support effect after excavation.

[0071] This step realizes the selection and modeling of the support structure. In practical applications, a single-layer concrete shaft wall can be selected as the main support structure. When simulating different excavation and support sequences, whenever the surrounding rock is excavated, the command stream module built into the FLAC3D software is used to establish a shell structure model on the newly exposed surrounding rock contact surface according to the excavation plan predetermined by the single excavation and support stroke of the shaft boring machine. The purpose of constructing the shell structure model is to simulate the concrete lining, which represents the geometric shape and mechanical properties of the concrete shaft wall.

[0072] In another exemplary embodiment of the present application, in step 105, during the simulation of the support effect, as the tunnel boring machine advances, the support structure model expands accordingly, and its constraint and bearing effect on the newly exposed surrounding rock are simulated in real time. The FLAC3D software monitors the contact pressure between the support structure and the surrounding rock at the arranged monitoring points, the relative displacement change between the support structure and the surrounding rock, and the stress distribution of the support structure by writing fish statements to obtain simulation results.

[0073] In another exemplary embodiment of the present application, in order to evaluate the effectiveness and safety of the support structure and provide a basis for adjusting the support parameters or optimizing the support scheme, after step 105, the shaft boring machine construction simulation method further includes:

[0074] The maximum principal stress of the support structure is calculated based on the stress distribution of the support structure in the simulation results; the safety factor of the construction process is calculated based on the maximum principal stress and the axial compressive strength of the support structure. The calculation formula of the safety factor is as follows:

[0075]

[0076] Where K represents the safety factor; σ ccIt represents the axial compressive strength of the supporting structure. When the supporting structure is in the form of a concrete shaft wall, the axial compressive strength of the supporting structure is the axial compressive strength of the concrete. At this time, σ cc The value can be 20.1MPa; max Represents the maximum principal stress of the supporting structure.

[0077] When the safety factor is less than or equal to the set value, the current support timing, support parameters and support structure are adjusted to optimize the current support scheme. The set value can be set to 1. When the safety factor is greater than the set value, the current support scheme is maintained.

[0078] The following uses the deep excavation of the auxiliary shaft of Xi'anshan Iron Mine as an example to simulate the whole process of integrated construction of tunneling and support in soft rock formations. First, the numerical simulation is performed through FLAC3D software to obtain the construction simulation numerical model, such as Figure 3 As shown, Figure 3 The left side of the figure shows the anchor rod, and the corresponding right side anchor rod section is located in the well wall of the rock simulation structure. Below the wellbore is the cutter head of the shaft boring machine. Figure 3 The model shown in the figure implements the above steps 102 to 105, thereby simulating the whole process of integrated construction of tunneling and support in soft rock formations, revealing the temporal and spatial evolution of shaft stress and deformation, and providing a solid theoretical basis for the formulation of scientific and reasonable construction technology. Through in-depth analysis of simulation data, the construction plan can be optimized, and tunneling strategies and support measures that are adapted to the specific geological conditions of Xi'anshan Iron Mine can be proposed to ensure safe and efficient deep shaft excavation.

[0079] The above-mentioned embodiment adopts the finite element numerical simulation method to realize the construction simulation of the shaft boring machine, and especially adopts the FLAC3D software, an advanced geotechnical engineering simulation platform, to simulate the entire construction process in detail. With its powerful three-dimensional modeling capabilities, nonlinear material model support and good handling of complex boundary conditions, FLAC3D software provides an ideal tool for accurately simulating shaft excavation and support in soft rock formations. In the constructed numerical model, the stress redistribution of the surrounding rock in the vicinity of the shaft excavation surface is included in detail. This is because the excavation operation will destroy the original stress balance, cause stress redistribution, and thus affect the stability of the surrounding rock. According to the engineering geological conditions at the shaft engineering site and the size of the shaft, the size range and stratum material characteristics of the three-dimensional finite element calculation model of the shaft are determined to ensure sufficiently accurate simulation of the key construction section.

[0080] During the simulation process, special attention should be paid to the interaction mechanism between the tunnel boring machine and the supporting structure. The tunnel boring machine operates in a high-stress environment, which is essentially a gradual unloading of the surrounding rock. This process needs to be accurately reproduced in the numerical simulation. For this reason, a dynamic construction step simulation was adopted, that is, the tunnel boring machine advances section by section (each advance is 1m) and the supporting structure follows up section by section in the actual construction. After each excavation, the model immediately performs iterative calculations to reflect the changes in the stress state around the newly formed excavation face. At the same time, considering that the release of surrounding rock stress in actual working conditions is not instantaneous, but a continuous process, the simulation ensures that the surrounding rock stress has not been completely released at each iteration to maintain a high degree of consistency with the actual situation.

[0081] Through such dynamic simulation, not only can the stress and deformation evolution laws of the shaft in the horizontal (i.e. radial) and vertical (i.e. axial) directions be revealed, but also the stress concentration, displacement development and possible local instability of the surrounding rock at different depths and different excavation stages can be deeply understood. The simulation results have direct guiding significance for determining the optimal excavation speed, support timing, support parameters (such as anchor length, spacing, preload, etc.) and support structure forms (such as concrete spraying, pipe shed, steel support, etc.).

[0082] The above numerical simulation can realize the all-round and dynamic simulation of the construction process of the shaft boring machine under the conditions of deep shaft excavation, including key links such as surrounding rock stress-strain response, interaction between the tunnel boring machine and surrounding rock, support structure construction and effect, etc., which provides strong theoretical support for construction process optimization and safety risk control.

[0083] Based on the same inventive concept, the embodiment of the present application also provides a shaft boring machine construction simulation device for implementing the shaft boring machine construction simulation method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more shaft boring machine construction simulation device embodiments provided below can refer to the limitations of the shaft boring machine construction simulation method above, and will not be repeated here.

[0084] In an exemplary embodiment, a shaft boring machine construction simulation device is provided, comprising:

[0085] The numerical model building module is used to build a construction simulation numerical model using a finite element numerical simulation platform; the construction simulation numerical model includes: a tunneling part model of a tunnel boring machine, a three-dimensional model of surrounding rock, and a constitutive model of surrounding rock materials.

[0086] The parameter setting module is used to set the interaction simulation parameters, boundary conditions and initial state of the construction simulation numerical model to obtain the construction simulation numerical model after parameter setting.

[0087] The excavation process simulation module is used to simulate the excavation process of the tunnel boring machine advancing step by step along the axial direction at a set advancement distance in the construction simulation numerical model after parameter setting; wherein, at the beginning of each advancement, a load equal to the actual excavation thrust is applied at the excavation front.

[0088] The support model building module is used to build a support structure model on the surrounding rock contact surface exposed by the current advancement section according to the current support scheme at the end of each advancement section during the simulation of the excavation process.

[0089] The support effect simulation module is used to simulate the support effect of the support structure according to the support structure model at the end of each advancement during the simulation of the excavation process to obtain simulation results; the simulation results include: the contact pressure between the support structure and the surrounding rock, the relative displacement change between the support structure and the surrounding rock, and the stress distribution of the support structure; the simulation results are used to determine the safety factor of the construction process; the safety factor is used to optimize the current support plan.

[0090] In order to optimize the construction plan and predict possible problems, the above-mentioned shaft boring machine construction simulation device adopts numerical simulation technology to simply and accurately simulate the construction process, providing strong theoretical support for construction process optimization and safety risk control.

[0091] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store construction simulation numerical models. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for simulating the construction of a shaft boring machine is implemented.

[0092] Those skilled in the art will understand that Figure 4The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0093] In an exemplary embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0094] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0095] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0096] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0097] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0098] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, etc., but is not limited thereto.

[0099] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A shaft boring machine construction simulation method, characterized in that: The shaft boring machine construction simulation method comprises: A finite element numerical simulation platform is used to construct a construction simulation numerical model; the construction simulation numerical model includes: a tunneling part model of a tunnel boring machine, a three-dimensional model of surrounding rock, and a constitutive model of surrounding rock materials; Setting interaction simulation parameters, boundary conditions and initial states of the construction simulation numerical model to obtain a construction simulation numerical model after parameter setting; In the construction simulation numerical model after parameter setting, the tunneling process of the tunnel boring machine advancing in sections along the axial direction at a set advancing distance is simulated; at the beginning of each section of advancement, a load equal to the actual tunneling thrust is applied to the excavation front; In the process of simulating the tunneling process, at the end of each advancement section, a support structure model is constructed on the surrounding rock contact surface exposed in the current advancement section according to the current support scheme; In the process of simulating the excavation process, at the end of each advancement, the support effect of the support structure is simulated according to the support structure model to obtain simulation results; the simulation results include: contact pressure between the support structure and the surrounding rock, relative displacement change between the support structure and the surrounding rock, and stress distribution of the support structure; the simulation results are used to determine the safety factor of the construction process; the safety factor is used to optimize the current support scheme; The finite element numerical simulation platform is used to build a construction simulation numerical model, including: According to the actual data of the tunneling part of the tunneling machine, the tunneling part model of the tunneling machine is constructed using the built-in meshing model in the FLAC3D software; the actual data includes: actual equipment size, shape and weight; Based on the geological survey data, a three-dimensional model of the surrounding rock is constructed using the grid division model built into the FLAC3D software; the geological survey data includes: rock layer type, rock layer thickness and rock layer physical and mechanical properties; The Mohr-Coulomb constitutive model in FLAC3D software is used as the constitutive model of surrounding rock materials; The interaction simulation parameters, boundary conditions and initial state of the construction simulation numerical model are set, specifically including: Simulating the interaction between the supporting structure and the surrounding rock, and defining interaction simulation parameters; the interaction simulation parameters include: normal contact force of the contact surface between the supporting structure and the surrounding rock, tangential contact force of the contact surface between the supporting structure and the surrounding rock, friction coefficient of the contact surface between the supporting structure and the surrounding rock, and relative displacement between the supporting structure and the surrounding rock; Setting boundary conditions of the construction simulation numerical model; the boundary conditions include: fixed boundary, displacement boundary and load boundary; Initializing the geostress distribution of the construction simulation numerical model according to the geological survey data, and setting the initial displacement of the construction simulation numerical model to zero, thereby completing the setting of the initial state; The shaft boring machine construction simulation method further includes: When the safety factor is less than or equal to the set value, the current support timing, support parameters and support structure are adjusted to optimize the current support scheme; When the safety factor is greater than the set value, the current support plan is maintained.

2. The shaft boring machine construction simulation method according to claim 1, characterized in that: In the construction simulation numerical model after parameter setting, the tunneling process of the tunnel boring machine advancing step by step along the axial direction at a set advancing distance is simulated, including: In the construction simulation numerical model after parameter setting, select the area to be excavated; In the area to be excavated, the empty cell technology is used to simulate the excavation process of the tunnel boring machine advancing step by step along the axial direction at a set advancing distance.

3. The shaft boring machine construction simulation method according to claim 1, characterized in that: In the process of simulating the excavation process, at the end of each advancement section, a support structure model is constructed on the surrounding rock contact surface exposed in the current advancement section according to the current support scheme, including: If the support structure in the current support scheme is in the form of a concrete shaft wall, in the process of simulating the excavation process, at the end of each advancement section, the built-in shell element in the FLAC3D software is used to simulate the geometric shape and mechanical properties of the concrete shaft wall to obtain the support structure model on the surrounding rock contact surface exposed in the current advancement section; If the support structure in the current support scheme is in the form of anchor rods, then in the process of simulating the excavation process, at the end of each section of advancement, the built-in anchor cable unit in the FLAC3D software is used to simulate the length, diameter and prestress of the anchor rods to obtain the support structure model on the surrounding rock contact surface exposed by the current advancement section.

4. The shaft boring machine construction simulation method according to claim 1, characterized in that: The shaft boring machine construction simulation method further includes: Calculate the maximum principal stress of the support structure based on the stress distribution of the support structure in the simulation results; The safety factor of the construction process is calculated based on the maximum principal stress and the axial compressive strength of the supporting structure.

5. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the shaft boring machine construction simulation method according to any one of claims 1 to 4.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the shaft boring machine construction simulation method described in any one of claims 1 to 4 is implemented.

7. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the shaft boring machine construction simulation method described in any one of claims 1 to 4 is implemented.

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