Compressed air energy storage underground lining cavern optimization design method and system

Abstract

The invention discloses a compressed air energy storage underground lining cavern optimization design method and system, and belongs to the technical field of compressed air energy storage. The method comprises the steps that numerical simulation is conducted according to obtained rock mass parameters and given structural design parameters of the compressed air energy storage underground lining cavern, and the burial depth range of the compressed air energy storage underground lining cavern is determined; according to the buried depth range of the compressed air energy storage underground lining cavern, physical and mechanical parameters of surrounding rock of the stratum where the cavern is located are determined, and the load borne by the compressed air energy storage underground lining cavern structure is calculated; according to the load borne under the compressed air energy storage underground lining cavern structure, the limit burial depth of the compressed air energy storage underground lining cavern is obtained based on a limit equilibrium analysis method; and carrying out stability analysis on the limit burial depth of the compressed air energy storage underground lining cavern. According to the method, through steel lining-concrete lining-surrounding rock collaborative bearing mechanism analysis, inter-structure load distribution is quantified, the conservative property of traditional burial depth design is broken through, and stability optimization of the cavern is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and in particular to an optimization design method, system, equipment, medium and program for a compressed air energy storage underground lined cavern. Background Art

[0002] Against the backdrop of the accelerated transformation of the global energy structure and the large-scale development and utilization of renewable energy, the efficient storage and stable supply of energy have become key issues constraining the sustainable development of energy systems. In recent years, compressed air energy storage technology has rapidly developed, becoming a research hotspot in the energy storage field, thanks to its significant advantages such as large energy storage capacity, long lifespan, and relatively low cost. This technology cleverly utilizes compressed air to store energy. Its core operating mechanism is to compress air using excess electricity from the grid during periods of low electricity demand and safely store the compressed air. When electricity demand reaches its peak, this stored compressed air is released and its contained energy is converted into electricity through a specific device, effectively balancing the supply and demand contradictions of the power grid and achieving "peak shaving and valley filling" of electricity. This greatly improves the stability of the power grid and its ability to absorb renewable energy, providing a practical solution to the imbalance between electricity supply and demand caused by intermittent power sources such as traditional wind power and photovoltaic power generation.

[0003] In compressed air energy storage systems, underground rock-lined caverns are key facilities for storing compressed air. Due to their many advantages such as high safety and flexible site selection, they have gradually become the mainstream method of compressed air storage. However, the current design of underground rock-lined cavern structures has certain limitations. The existing cavern structure is mainly composed of three parts: steel lining, concrete lining and surrounding rock. Studies have shown that both steel lining and concrete lining can play a certain bearing role in the process of the cavern bearing loads. However, the traditional cavern burial depth design concept is relatively conservative. It only considers the deadweight of the rock mass above the cavern and completely ignores the complex interaction between the steel lining, concrete lining and surrounding rock. This design method leads to conservative calculation results of the cavern's ultimate burial depth. In actual engineering construction, in order to meet conservative design requirements, it is often necessary to increase the cavern's burial depth, increase the lining thickness, etc., which greatly increases construction costs and causes waste of resources. Therefore, in-depth research on the load sharing mechanism of cavern structures, proposing scientific and reasonable buried depth and structural design methods for underground lined caverns for compressed air energy storage, and effectively reducing cavern construction costs while ensuring cavern stability have become important issues that need to be urgently addressed in the current development of compressed air energy storage technology. Summary of the Invention

[0004] In the existing art of designing underground rock-lined caverns for compressed air energy storage, the traditional burial depth design only considers the deadweight of the rock mass and ignores the interaction between the steel lining, concrete lining, and surrounding rock, resulting in conservative calculations of the cavern's ultimate burial depth and poor cavern stability. This invention provides an optimized design method for underground lined caverns for compressed air energy storage. By analyzing the collaborative bearing mechanism of the steel lining, concrete lining, and surrounding rock, it quantifies the load distribution between the structures, overcomes the conservatism of traditional burial depth design, and achieves optimized cavern stability.

[0005] In order to achieve the above objectives, the present invention provides the following technical solutions.

[0006] In a first aspect, the present invention provides a method for optimizing the design of an underground lined cavern for compressed air energy storage, comprising: Based on the obtained rock mass parameters and the given structural design parameters of the compressed air energy storage underground lined cavern, numerical simulation is performed to determine the buried depth range of the compressed air energy storage underground lined cavern; According to the buried depth range of the compressed air energy storage underground lined cavern, the physical and mechanical parameters of the surrounding rock of the cavern are determined, and the load borne by the compressed air energy storage underground lined cavern structure is calculated; According to the load borne by the underground lined cavern structure of compressed air energy storage, the ultimate burial depth of the underground lined cavern of compressed air energy storage is obtained based on the limit equilibrium analysis method; A stability analysis is performed on the ultimate burial depth of the underground lined cavern for compressed air energy storage. If the analysis results meet the set conditions, the design scheme of the underground lined cavern for compressed air energy storage is obtained.

[0007] As a further improvement of the present invention, the method of performing numerical simulation based on the obtained rock mass parameters and the given structural design parameters of the compressed air energy storage underground lined cavern to determine the buried depth range of the compressed air energy storage underground lined cavern includes: Obtain rock mass parameters for site selection of underground lined caverns for compressed air energy storage projects; According to the rock mass parameters and the structural design parameters of the given compressed air energy storage underground lined cavern, numerical simulation is carried out to analyze the stress field and deformation law of the surrounding rock under different combined working conditions, and the burial depth range of the compressed air energy storage underground lined cavern is obtained.

[0008] As a further improvement of the present invention, the method of determining the physical and mechanical parameters of the surrounding rock of the stratum in which the compressed air energy storage underground lined cavern is located according to the buried depth range of the compressed air energy storage underground lined cavern and calculating the load borne by the compressed air energy storage underground lined cavern structure includes: According to the buried depth range of the underground lined cavern for compressed air energy storage, the physical and mechanical parameters of the surrounding rock of the cavern are determined; Based on the physical and mechanical parameters of the surrounding rock of the cavern and the structural design parameters of the given compressed air energy storage underground lined cavern, the loads borne by each structure in the compressed air energy storage underground lined cavern are calculated using the multi-layer thick-walled cylinder theory. The loads borne by each structure in the compressed air energy storage underground lined cavern include:

[0009]

[0010]

[0011] Where, It is the difference between the radial stress of the inner interface of the steel lining and the radial stress of the outer interface; It is the difference between the radial stress of the inner interface and the radial stress of the outer interface of the concrete lining; It is the difference between the radial stress of the inner interface of the surrounding rock and the radial stress of the outer interface; Design the maximum gas storage pressure for the gas storage facility; is the pressure of the sealing layer; is the pressure of the concrete lining; p3 is the ground stress.

[0012] As a further improvement of the present invention, the method of obtaining the ultimate burial depth of the underground lined cavern for compressed air energy storage based on the load borne by the underground lined cavern for compressed air energy storage and the limit equilibrium analysis method includes: According to the load borne by the underground lined cavern structure of compressed air energy storage and the rock mass strength parameters, the ultimate burial depth of the underground lined cavern of compressed air energy storage is calculated by the limit equilibrium analysis method; The calculation of the maximum burial depth of the underground lined cavern for compressed air energy storage includes:

[0013]

[0014] Combining the above formulas, we get:

[0015] Where r is the radius of the cavern, is the safety factor, G is the gravity of the overlying rock; is the total pressure on the BC surface; the BC surface is the fracture surface of the overlying surrounding rock; H is the depth of the cavern; Design maximum gas storage pressure for the gas storage facility; coefficient ;coefficient ; γ is the severity; φ is the internal friction angle of the surrounding rock.

[0016] As a further improvement of the present invention, the safety factor is When it is equal to the cavern burial depth H, the ultimate burial depth of the underground lined cavern for compressed air energy storage is obtained.

[0017] As a further improvement of the present invention, the stability analysis of the ultimate buried depth of the compressed air energy storage underground lined cavern is performed. If the analysis result meets the set conditions, the design parameters of the compressed air energy storage underground lined cavern are obtained, including: The design scheme of the underground lined cavern with the maximum burial depth for compressed air energy storage; Perform stability analysis on the cavern design scheme. If the analysis results meet the set conditions, obtain the design scheme of the underground lined cavern for compressed air energy storage; If the analysis results do not meet the design conditions, the cavern burial depth and cavern structure design parameters are optimized until the set conditions are met, and the design scheme of the underground lined cavern for compressed air energy storage is obtained.

[0018] In a second aspect, the present invention provides a system for optimizing the design of underground lined caverns for compressed air energy storage, comprising: The module for determining the buried depth range of the cavern is used to perform numerical simulation based on the obtained rock mass parameters and the given structural design parameters of the underground lined cavern for compressed air energy storage, and determine the buried depth range of the underground lined cavern for compressed air energy storage; Module for calculating the load borne by the cavern: used to determine the physical and mechanical parameters of the surrounding rock of the cavern according to the buried depth range of the compressed air energy storage underground lined cavern, and calculate the load borne by the compressed air energy storage underground lined cavern structure; Obtaining the Ultimate Burial Depth of the Cavern: This module is used to obtain the ultimate burial depth of the underground lined cavern of compressed air energy storage based on the load borne by the underground lined cavern structure of compressed air energy storage and the limit equilibrium analysis method; Obtaining cavern design scheme module: used to perform stability analysis on the ultimate burial depth of the underground lined cavern for compressed air energy storage. If the analysis results meet the set conditions, the design scheme of the underground lined cavern for compressed air energy storage is obtained.

[0019] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for optimizing the design of underground lined caverns for compressed air energy storage are implemented.

[0020] In a fourth aspect, the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the method for optimizing the design of an underground lined cavern for compressed air energy storage.

[0021] In a fifth aspect, the present invention provides a computer program product, characterized in that it includes computer instructions, which, when executed by a processor, implement the steps of the method for optimizing the design of underground lined caverns for compressed air energy storage.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The present invention, by obtaining rock mass parameters and given cavern structure design parameters for numerical simulation, can accurately determine the burial depth range of the underground lined cavern for compressed air energy storage, making the determination of the burial depth range more scientific and reasonable, and providing a solid and reliable foundation for subsequent design work. Secondly, based on the determined burial depth range, the physical and mechanical parameters of the surrounding rock of the stratum in which the cavern is located are further determined, and the load borne by the cavern structure is calculated. The interaction between the cavern and the surrounding environment is deeply explored, and the characteristics of the surrounding rock are incorporated into the load calculation, making the calculation results closer to the actual situation and avoiding the load calculation deviation caused by ignoring these factors in traditional methods. Therefore, this method fully considers the collaborative load-bearing mechanism of steel lining-concrete lining-surrounding rock, and breaks the conservatism of traditional burial depth design by quantifying the load distribution between structures. The analysis of this collaborative load-bearing mechanism enables the design to more accurately grasp the stress conditions of the cavern under different working conditions, thereby reasonably determining the ultimate burial depth. Under the premise of ensuring the safety and stability of the cavern, the burial depth design is optimized to the greatest extent, reducing engineering costs and construction difficulty.

[0023] Furthermore, this method performs a stability analysis of the ultimate burial depth and, when the specified conditions are met, generates a cavern design solution. This step ensures the reliability and practicality of the design results. Through rigorous stability analysis, potential safety hazards can be identified in advance, allowing for timely adjustments and optimization of the design solution, ensuring that the final cavern design is highly stable and safe in actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In the drawings: Figure 1 A schematic flow chart of an optimization design method for an underground lined cavern for compressed air energy storage according to the present invention; Figure 2 This is a specific flow chart of a method for optimizing the design of an underground lined cavern for compressed air energy storage according to the present invention; Figure 3 Schematic diagram of numerical simulation of compressed air energy storage in the embodiment provided by the present invention; Figure 4 Schematic diagram of the structure of each layer of the compressed air energy storage underground lined cavern in the optimization design method of the compressed air energy storage underground lined cavern of the present invention; Figure 5Schematic diagram of a limit equilibrium analysis model for a compressed air energy storage underground lined cavern in an optimization design method for a compressed air energy storage underground lined cavern of the present invention; Figure 6 This is a structural schematic diagram of an optimized design system for underground lined caverns for compressed air energy storage according to the present invention; Figure 7 Schematic diagram of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. The embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Aiming at the problem that the conventional design of underground rock-lined caverns for compressed air energy storage only considers the deadweight of the rock mass and ignores the interaction between the steel lining, concrete lining and surrounding rock, which results in conservative calculation of the ultimate burial depth of the cavern and poor stability of the cavern, the present invention provides an optimization design method for underground rock-lined caverns for compressed air energy storage. Figure 1 As shown, the method includes: S100: performing numerical simulation based on the acquired rock mass parameters and the given structural design parameters of the compressed air energy storage underground lined cavern to determine the buried depth range of the compressed air energy storage underground lined cavern; S200: Determine the physical and mechanical parameters of the surrounding rock of the compressed air energy storage underground lined cavern based on the buried depth range of the cavern, and calculate the load borne by the compressed air energy storage underground lined cavern structure; S300: Based on the load borne by the underground lined cavern structure of the compressed air energy storage, the ultimate burial depth of the underground lined cavern of the compressed air energy storage is obtained based on the limit equilibrium analysis method; S400: Perform a stability analysis on the ultimate buried depth of the compressed air energy storage underground lined cavern. If the analysis result meets the set conditions, obtain a design scheme for the compressed air energy storage underground lined cavern.

[0028] This method analyzes the coordinated bearing mechanism of steel lining-concrete lining-surrounding rock, quantifies the load distribution among structures, breaks through the conservatism of traditional burial depth design, and optimizes the stability of the cavern.

[0029] The present invention will be further explained below with reference to the accompanying drawings.

[0030] like Figure 2 As shown, the present invention proposes a method for optimizing the design of underground lined caverns for compressed air energy storage, which specifically includes the following steps: S1: Determine the project site and obtain on-site rock mass physical and mechanical parameters and in-situ rock stress data through indoor and field tests.

[0031] Specifically: Obtain the density ρ, elastic modulus E, cohesion c, internal friction angle φ, Poisson's ratio µ of different strata at the project site, and obtain the in-situ stress through in-situ tests .

[0032] S2: Given the structural design parameters and operating parameters of the compressed air energy storage underground lined cavern according to engineering requirements.

[0033] Specifically: Preliminary determination of the cavity radius , steel lining thickness , elastic modulus of steel lining , Poisson's ratio of steel lining , concrete lining thickness , concrete lining elastic modulus , Poisson's ratio of concrete lining , and the maximum gas pressure of the underground lined cavern for compressed air energy storage .

[0034] Table 1 Example of design and operation parameters of underground lined caverns for compressed air energy storage

[0035] S3: Carry out numerical simulation of underground lined caverns for compressed air energy storage, preliminarily estimate the burial depth range of underground lined caverns for compressed air energy storage, and determine the physical and mechanical parameters of the surrounding rock of the stratum where the cavern is located.

[0036] Specifically: Conduct numerical simulation of compressed air energy storage underground lined caverns to determine the density of the surrounding rock formation in which the cavern is located , elastic modulus , cohesion , internal friction angle , Poisson's ratio Among them, examples of surrounding rock parameters for numerical simulation of compressed air energy storage are shown in Table 2.

[0037] Table 2 Examples of surrounding rock parameters for numerical simulation of compressed air energy storage

[0038] The numerical simulation of compressed air energy storage was carried out in ABAQUS simulation software, such as Figure 3 Considering the stress and deformation of the surrounding rock during the excavation and aeration stages, the stress field and deformation law of the surrounding rock under different combined working conditions are analyzed to determine the optimal gas storage chamber type under the surrounding rock conditions, and further determine the physical and mechanical parameters of the stratum in which the chamber is located.

[0039] S4: Use the multi-layer thick-walled cylinder theory to calculate the loads borne by different structures of compressed air energy storage underground lined caverns.

[0040] Specifically: like Figure 4 As shown, 、 、 、 Represent the inner and outer radii of each structure, respectively, where is the influence radius of the gas storage, is the influence radius of the sealing layer, is the influence radius of the concrete lining, is the influence radius of the surrounding rock, which means the area far enough away from the influence of the gas storage reservoir, that is, the influence radius of the gas pressure. 、 、 、 Respectively represent the radial stress of each structure, where Design the maximum gas storage pressure for the gas storage facility. is the pressure of the sealing layer, is the pressure of the concrete lining, and p3 is the ground stress. The radial stress of the gas storage surrounding rock can be determined by calculating the variation of radial distance under several typical working conditions using formula (1). When the variation of radial stress with radial radius can be ignored, the position can be determined as the boundary of the influencing radius. Obtained through in situ testing.

[0041] (1) (1) The stress functions of the steel lining, concrete lining and surrounding rock are obtained from the single-layer thick-walled cylinder theory: (2) (3) (4) Where, is the stress function of the steel lining; is the stress function of the concrete lining; is the stress function of the surrounding rock.

[0042] (2) Calculate the elastic modulus and Poisson's ratio of the steel lining, concrete lining and surrounding rock for plane strain analysis: (5) (6) (7) (8) (9) (10) in, The elastic modulus of the steel lining required for analyzing plane strain problems; The elastic modulus required for the concrete lining to analyze plane strain problems; is the elastic modulus of the surrounding rock required for analyzing plane strain problems; Poisson's ratio required for steel linings to analyze plane strain problems; Poisson's ratio required for concrete linings to analyze plane strain problems; is the Poisson's ratio of the surrounding rock required for analyzing plane strain problems.

[0043] (3) Calculate the stress and displacement of steel lining, concrete lining and surrounding rock: (11) (12) (13) (14) (15) (16) (17) (18) (19) Where, is the radial stress of the steel lining; is the radial stress of the concrete lining; is the radial stress of the surrounding rock; is the hoop stress of the steel lining; is the hoop stress of the concrete lining; is the hoop stress of the surrounding rock; is the displacement of the steel lining; is the displacement of the concrete lining; is the displacement of the surrounding rock.

[0044] (4) Internal and external boundary conditions of the gas storage reservoir and boundary conditions at the junction of steel lining-concrete lining and concrete lining-surrounding rock: (20) (twenty one) (twenty two) (twenty three) (twenty four) (25) (5) Substituting equations (11) to (19) into equations (20) to (25), we can obtain the equation coefficients A1, A2, A3, C1, C2, and C3. Substitute them into the calculation to obtain the radial stress of the internal and external sections of each structure in the cavern, and then calculate the load borne by each structure of the compressed air energy storage underground lining cavern: (26) (27) (28) Where, is the difference between the radial stress of the inner interface of the steel lining and the radial stress of the outer interface, is the difference between the radial stress of the inner interface and the radial stress of the outer interface of the concrete lining, is the difference between the radial stress of the inner interface of the surrounding rock and the radial stress of the outer interface, that is, the load borne by each structure. The load examples borne by different structures of the underground lined cavern of compressed air energy storage are calculated and shown in Table 3.

[0045] Table 3 Example of loads borne by each layer of the compressed air energy storage underground lined cavern

[0046] S5: Based on the load borne by the surrounding rock, the limit equilibrium analysis method is used to calculate the ultimate burial depth of the underground lined cavern for compressed air energy storage under different safety factors.

[0047] Specifically: like Figure 5 As shown in the figure, the rigid cone model is used to calculate the ultimate burial depth of the underground lined cavern for compressed air energy storage. Assume that the upper length of the overlying rock mass is 2L, the lower length is 2r, the height is H, the BC surface and the B'C' surface are the fracture surfaces of the overlying surrounding rock, and the fracture surface angle is The overlying rock mass is subjected to its own weight. , Face to face Surface under pressure and shear resistance , The ground is not affected by external forces. Surface is subjected to gas pressure .

[0048] 1) Calculation Static earth pressure on the surface

[0049] in, is the lateral pressure coefficient, For severe, The depth of the cave, for The resultant of the static earth pressures on a surface.

[0050] 2) Calculate the rupture surface pressure

[0051] Block The forces are balanced in the horizontal direction, that is,

[0052] in, for The total pressure on the surface, φ is the internal friction angle of the surrounding rock, for Total shear force on the surface.

[0053] According to the Mohr-Coulomb criterion, the shear stress on the fracture surface satisfies:

[0054] in, It is the cohesion of surrounding rock.

[0055] Combining the above formulas, we get for:

[0056] 3) Calculate the depth of the cavern The vertical stress analysis of the entire overlying rock mass yields:

[0057] Where r is the radius of the cavern, is the safety factor, which can be 1.3~2.0 according to needs. G is the gravity of the overlying rock. The calculation method is:

[0058] Combining the above formulas, we get:

[0059] in,

[0060]

[0061] Determine the depth of the cavern A positive value of The ultimate burial depth of the underground lined cavern for compressed air energy storage under different working conditions is calculated, as shown in Table 4.

[0062] Table 4 Calculation example of the ultimate burial depth of underground lined caverns for compressed air energy storage

[0063] S6: Conduct a quantitative evaluation of the cavern design scheme by comprehensively considering the cavern stability and the construction cost of each layer structure.

[0064] Specifically: Cavern design scheme evaluation =

[0065] Optimal cavern design =

[0066] Among them, H is the depth of the cavern, COST is the construction cost of the cavern, Indicates that at a given safety factor Under the condition of , the underground lined cavern of compressed air energy storage has the smallest burial depth and the lowest cost. The calculation formula of construction cost is:

[0067] Among them, a is the cost coefficient of steel lining, b is the cost coefficient of concrete lining, and c is the cost coefficient of cavern excavation related to the burial depth.

[0068] S7: Under the premise of ensuring the stability of the cavern, the cavern burial depth and cavern structure design parameters are optimized based on the quantitative evaluation results to minimize the construction cost.

[0069] In summary, the present invention determines the project site and obtains the physical and mechanical parameters of the rock mass at the project site; gives the design parameters and operating parameters of the underground lined cavern for compressed air energy storage according to the project requirements; conducts numerical simulation of compressed air energy storage to preliminarily estimate the burial depth range of the underground lined cavern for compressed air energy storage, and determines the physical and mechanical parameters of the surrounding rock of the stratum in which the cavern is located; calculates the load shared by different structures of the lined cavern based on the thick-walled cylinder theory, calculates the ultimate burial depth of the cavern through the limit equilibrium analysis method, comprehensively considers the stability of the cavern and the construction cost of each layer of structure, optimizes the design parameters, and saves the construction cost of the underground lined cavern for underground compressed air energy storage while ensuring the stability of the cavern.

[0070] The second purpose of the present invention is to propose an optimization design system for underground lined caverns with compressed air energy storage, such as Figure 6 As shown, including: The module 100 for determining the buried depth range of the cavern is used to perform numerical simulation based on the obtained rock mass parameters and the structural design parameters of the given compressed air energy storage underground lined cavern to determine the buried depth range of the compressed air energy storage underground lined cavern; The cavern load calculation module 200 is used to determine the physical and mechanical parameters of the surrounding rock of the cavern according to the buried depth range of the compressed air energy storage underground lined cavern, and calculate the load borne by the compressed air energy storage underground lined cavern structure; The module 300 for obtaining the maximum burial depth of the cavern is used to obtain the maximum burial depth of the underground lined cavern of the compressed air energy storage based on the load borne by the underground lined cavern structure of the compressed air energy storage and the limit equilibrium analysis method; The cavern design scheme acquisition module 400 is used to perform stability analysis on the ultimate burial depth of the compressed air energy storage underground lined cavern. If the analysis result meets the set conditions, the design scheme of the compressed air energy storage underground lined cavern is acquired.

[0071] like Figure 7 As shown, the third object of the present invention is to provide an electronic device, comprising: a processor 501, a memory 502, and a display screen 503. The memory 502 and the display screen 503 are both connected to the processor 501, such as via a bus 504. Optionally, the electronic device may further include a transceiver 505. It should be noted that in actual applications, the number of transceivers 505 is not limited to one, and the structure of the electronic device does not constitute a limitation on the embodiments of the present application.

[0072] Processor 501 can be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 501 can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0073] Bus 504 may include a path for transmitting information between the aforementioned components. Bus 504 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, for example. Bus 504 may be divided into an address bus, a data bus, a control bus, and other components.

[0074] The memory 502 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0075] The memory 502 is used to store application code for executing the solution of the present application, and the execution is controlled by the processor 501. The processor 501 is used to execute the application code stored in the memory 502 to implement the content shown in the above method embodiment.

[0076] Figure 7 The electronic device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0077] The fourth object of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program is stored thereon, and when the program is executed by a processor, the computer program is realized as described above. Figure 1 The various processes of the illustrated method embodiment include, for example, a memory including instructions, which can be executed by a processor of an electronic device to perform the above method.

[0078] A computer-readable storage medium may be a tangible device that holds and stores instructions for use by an instruction execution device. A computer-readable storage medium may be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. Specifically, a computer-readable storage medium may be a portable computer disk, a hard drive, a USB flash drive, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a rostrum random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, an optical disc, a magnetic disk, a mechanical encoding device, or any combination thereof.

[0079] The fifth object of the present invention is to provide a computer program product comprising computer instructions, which, when executed by a processor, implement the above Figure 1 The various processes of the method embodiment shown can achieve the same technical effect, and to avoid repetition, they will not be described here.

[0080] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of the present teachings should be determined not with reference to the foregoing description, but rather with reference to the preceding claims, along with the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including the disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be interpreted that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0081] The above content is a further detailed description of the present invention, and it cannot be considered that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection of the present invention determined by the submitted claims.

Claims

1. A method for optimizing the design of underground lined caverns for compressed air energy storage, characterized in that: include: Based on the obtained rock mass parameters and the given structural design parameters of the compressed air energy storage underground lined cavern, numerical simulation is performed to determine the buried depth range of the compressed air energy storage underground lined cavern; According to the buried depth range of the compressed air energy storage underground lined cavern, the physical and mechanical parameters of the surrounding rock of the cavern are determined, and the load borne by the compressed air energy storage underground lined cavern structure is calculated; According to the load borne by the underground lined cavern structure of compressed air energy storage, the ultimate burial depth of the underground lined cavern of compressed air energy storage is obtained based on the limit equilibrium analysis method; A stability analysis is performed on the ultimate burial depth of the underground lined cavern for compressed air energy storage. If the analysis results meet the set conditions, the design scheme of the underground lined cavern for compressed air energy storage is obtained.

2. The method for optimizing the design of underground lined caverns for compressed air energy storage according to claim 1, characterized in that: The method of performing numerical simulation based on the obtained rock mass parameters and the given structural design parameters of the compressed air energy storage underground lined cavern to determine the buried depth range of the compressed air energy storage underground lined cavern includes: Obtain rock mass parameters for site selection of underground lined caverns for compressed air energy storage projects; According to the rock mass parameters and the structural design parameters of the given compressed air energy storage underground lined cavern, numerical simulation is carried out to analyze the stress field and deformation law of the surrounding rock under different combined working conditions, and the burial depth range of the compressed air energy storage underground lined cavern is obtained.

3. The method for optimizing the design of underground lined caverns for compressed air energy storage according to claim 1, characterized in that: The method of determining the physical and mechanical parameters of the surrounding rock of the stratum in which the compressed air energy storage underground lined cavern is located according to the buried depth range of the compressed air energy storage underground lined cavern and calculating the load borne by the compressed air energy storage underground lined cavern structure includes: According to the buried depth range of the underground lined cavern for compressed air energy storage, the physical and mechanical parameters of the surrounding rock of the cavern are determined; Based on the physical and mechanical parameters of the surrounding rock of the cavern and the structural design parameters of the given compressed air energy storage underground lined cavern, the loads borne by each structure in the compressed air energy storage underground lined cavern are calculated using the multi-layer thick-walled cylinder theory. The loads borne by each structure in the compressed air energy storage underground lined cavern include: Where, It is the difference between the radial stress of the inner interface of the steel lining and the radial stress of the outer interface; It is the difference between the radial stress of the inner interface and the radial stress of the outer interface of the concrete lining; It is the difference between the radial stress of the inner interface of the surrounding rock and the radial stress of the outer interface; Design the maximum gas storage pressure for the gas storage facility; is the pressure of the sealing layer; is the pressure of the concrete lining; p3 is the ground stress.

4. The method for optimizing the design of underground lined caverns for compressed air energy storage according to claim 1, characterized in that: The method of obtaining the ultimate burial depth of the underground lined cavern for compressed air energy storage based on the load borne by the underground lined cavern for compressed air energy storage and the limit equilibrium analysis method includes: According to the load borne by the underground lined cavern structure of compressed air energy storage and the rock mass strength parameters, the ultimate burial depth of the underground lined cavern of compressed air energy storage is calculated by the limit equilibrium analysis method; The calculation of the maximum burial depth of the underground lined cavern for compressed air energy storage includes: Combining the above formulas, we get: Where, is the cavity radius, is the safety factor, G is the gravity of the overlying rock; is the total pressure on the BC surface; the BC surface is the fracture surface of the overlying surrounding rock; H is the depth of the cavern; Design maximum gas storage pressure for the gas storage facility; coefficient ;coefficient ; γ is the severity; φ is the internal friction angle of the surrounding rock.

5. The method for optimizing the design of underground lined caverns for compressed air energy storage according to claim 4, characterized in that: The safety factor is When it is equal to the cavern burial depth H, the ultimate burial depth of the underground lined cavern for compressed air energy storage is obtained.

6. The method for optimizing the design of underground lined caverns for compressed air energy storage according to claim 1, characterized in that: The stability analysis of the ultimate buried depth of the compressed air energy storage underground lined cavern is performed. If the analysis result meets the set conditions, the design parameters of the compressed air energy storage underground lined cavern are obtained, including: The design scheme of the underground lined cavern with the maximum burial depth for compressed air energy storage; Perform stability analysis on the cavern design scheme. If the analysis results meet the set conditions, obtain the design scheme of the underground lined cavern for compressed air energy storage; If the analysis results do not meet the design conditions, the cavern burial depth and cavern structure design parameters are optimized until the set conditions are met, and the design scheme of the underground lined cavern for compressed air energy storage is obtained.

7. A compressed air energy storage underground lined cavern optimization design system, characterized in that: include: The module for determining the buried depth range of the cavern is used to perform numerical simulation based on the obtained rock mass parameters and the given structural design parameters of the underground lined cavern for compressed air energy storage, and determine the buried depth range of the underground lined cavern for compressed air energy storage; Module for calculating the load borne by the cavern: used to determine the physical and mechanical parameters of the surrounding rock of the cavern according to the buried depth range of the compressed air energy storage underground lined cavern, and calculate the load borne by the compressed air energy storage underground lined cavern structure; Obtaining the Ultimate Burial Depth of the Cavern: This module is used to obtain the ultimate burial depth of the underground lined cavern of compressed air energy storage based on the load borne by the underground lined cavern structure of compressed air energy storage and the limit equilibrium analysis method; Obtaining cavern design scheme module: used to perform stability analysis on the ultimate burial depth of the underground lined cavern for compressed air energy storage. If the analysis results meet the set conditions, the design scheme of the underground lined cavern for compressed air energy storage is obtained.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for optimizing the design of an underground lined cavern for compressed air energy storage as described in any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the method for optimizing the design of an underground lined cavern for compressed air energy storage according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises computer instructions which, when executed by a processor, implement the steps of a method for optimizing the design of an underground lined cavern for compressed air energy storage as described in any one of claims 1 to 6.

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