A method and system for analyzing discontinuous deformation of tunnel surrounding rock stability

Abstract

The present invention provides a method and system for analyzing the stability of tunnel surrounding rock in a non-continuous deformation manner, which emits seismic wave signals to generate emission phenomena at non-continuous structural surfaces such as faults, and analyzes the geometric parameters of the rock mass structural surface and the physical and mechanical parameters of the rock based on the reflected signals; constructs a three-dimensional non-continuous numerical calculation model according to the analysis requirements, and adds the rock mass structural surface to the calculation model based on the obtained geometric parameters; simulates the deformation and movement process of the surrounding rock blocks after the tunnel excavation is completed, and monitors the vertical displacement of each block in real time, and classifies the blocks with vertical displacement greater than the set value as collapsed blocks, otherwise they are safe blocks; based on the simulation results, predicts and analyzes the high-risk areas of block collapse disasters in the surrounding rock in front of the tunnel face. The present invention integrates seismic wave detection data to realize the prediction and analysis of the collapse disaster of the surrounding rock blocks in front of the tunnel face.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel surrounding rock stability analysis, and relates to a tunnel surrounding rock stability discontinuous deformation analysis method and system. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] During tunnel construction, non-continuous geological bodies such as faults and joints are often encountered, which can easily induce tunnel surrounding rock block collapse disasters. Tunnel surrounding rock block collapse disasters have strong structural characteristics, and the stability of the block is significantly affected by the structural surface. Existing studies mostly analyze rock stability through numerical simulation, and accurate rock structure surface information is particularly important for surrounding rock block collapse simulation. Therefore, it is urgent to carry out research on tunnel surrounding rock stability non-continuous deformation analysis methods that integrate seismic wave detection data to provide a basis for the prevention and control of tunnel surrounding rock block collapse disasters.

[0004] At present, the numerical calculation method for the stability analysis of surrounding rock blocks is mainly based on the block discrete element method (B-DEM). This method uses explicit integral solution. Compared with the three-dimensional discontinuous deformation analysis method using implicit integral solution, it has obvious disadvantages in simulation accuracy and is difficult to truly reflect the contact between blocks and deformation displacement. In addition, in the existing numerical simulation of surrounding rock block collapse, the structural surface data of the rock mass is mostly obtained by digital photography and other means to obtain the structural surface information of the rock mass surface. It is difficult to effectively obtain the structural surface data of the surrounding rock mass in front of the tunnel face, resulting in deviations between the numerical simulation results and the actual results. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a method and system for analyzing the discontinuous deformation of tunnel surrounding rock stability. The present invention integrates seismic wave detection data to realize the prediction and analysis of the collapse disaster of surrounding rock blocks in front of the tunnel face.

[0006] According to some embodiments, the present invention adopts the following technical solutions:

[0007] A method for analyzing the discontinuous deformation of tunnel surrounding rock stability comprises the following steps:

[0008] The seismic wave signal is emitted at the discontinuous structural surface such as the fault to generate the emission phenomenon, and the geometric parameters of the rock structure surface and the physical and mechanical parameters of the rock are analyzed based on the reflected signal;

[0009] According to the analysis requirements, a three-dimensional discontinuous numerical calculation model is constructed, and the rock mass structural surface is added to the calculation model based on the obtained geometric parameters;

[0010] Simulate the deformation and movement of surrounding rock blocks after tunnel excavation is completed, and monitor the vertical displacement of each block in real time. Blocks with vertical displacement greater than the set value are classified as collapsed blocks, otherwise they are safe blocks;

[0011] Based on the simulation results, the high-risk areas of block collapse disasters in the surrounding rock in front of the tunnel face are predicted and analyzed.

[0012] As an optional embodiment, the geometric parameters include the inclination and dip angle of the rock mass structural surface.

[0013] As an optional implementation, when constructing a three-dimensional non-continuous numerical calculation model, the size, fixing points, loading points, monitoring points, joint parameters, hole parameters and ground stress of the model are determined according to requirements.

[0014] As an optional implementation, the specific process of simulating the deformation and movement of surrounding rock blocks after tunnel excavation is completed includes recording the initial position information of each block, applying ground stress to each block, and analyzing the displacement of each block using a three-dimensional discontinuous deformation analysis method.

[0015] As an optional implementation, the serial number of each block whose vertical displacement is greater than a set value is recorded.

[0016] A tunnel surrounding rock stability discontinuous deformation analysis system, comprising:

[0017] Seismic wave prediction system, used to transmit seismic wave signals at discontinuous structural surfaces such as faults, and analyze the geometric parameters of rock mass structural surfaces and the physical and mechanical parameters of rocks based on the reflected signals;

[0018] The model building module is configured to build a three-dimensional non-continuous numerical calculation model according to the analysis requirements, and add a rock mass structural surface to the calculation model according to the obtained geometric parameters;

[0019] The motion simulation module is configured to simulate the deformation and movement of the surrounding rock blocks after the tunnel excavation is completed, and to monitor the vertical displacement of each block in real time. Blocks with vertical displacement greater than the set value are classified as collapsed blocks, otherwise they are safe blocks;

[0020] The prediction and analysis module is configured to predict and analyze the high-risk area of ​​block collapse disaster in the surrounding rock in front of the tunnel face based on the simulation results.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention is based on a tunnel seismic wave prediction system, and obtains geometric parameters such as the inclination and dip angle of the rock structure surface and the physical and mechanical parameters of the rock through the principle of seismic wave signal reflection;

[0023] Based on the three-dimensional discontinuous deformation analysis method, the present invention realizes the accurate simulation of the movement process and interaction of surrounding rock blocks after tunnel excavation is completed, laying a foundation for the prediction and analysis of surrounding rock block collapse disasters in front of the tunnel face;

[0024] The present invention solves the problem of identifying dangerous blocks in the tunnel by real-time monitoring the vertical displacement of surrounding rock blocks after tunnel excavation is completed.

[0025] The present invention integrates seismic wave detection data, conducts non-continuous deformation analysis of tunnel surrounding rock stability, predicts high-risk areas for tunnel surrounding rock block collapse disasters, effectively guides safe tunnel construction, and solves the problem of simulation and predictive analysis of tunnel surrounding rock block collapse disasters in non-continuous geological environments such as broken zones. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 is a flow chart of the method of the present invention;

[0028] Figure 2 The tunnel seismic wave prediction in this method obtains the rock mass structural surface model diagram;

[0029] Figure 3 This is the effect diagram of numerical calculation of tunnel surrounding rock block collapse disaster in this method. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] like Figure 1 As shown, a tunnel surrounding rock stability discontinuous deformation analysis method integrating seismic wave detection data includes the following steps:

[0034] The seismic wave prediction system (TSP203 Plus in this embodiment) is used to detect the rock structure surface in front of the tunnel face, such as Figure 2 As shown, the geometric parameters such as the inclination and dip angle of the structural surface are obtained;

[0035] According to the actual needs of the simulation, the size, fixing points, loading points, monitoring points, joint parameters, hole parameters, ground stress and other information of the calculation model are set, and the rock mass structural surface model is added to the calculation model based on the structural surface geometric parameters obtained by the seismic wave prediction system;

[0036] Based on the three-dimensional discontinuous deformation analysis method, the deformation and movement process of the surrounding rock blocks after the tunnel excavation is completed are simulated, and the vertical displacement of each block is monitored in real time. If it is greater than the set value (50 mm in this embodiment), it is classified as a collapsed block, otherwise it is a safe block, and the dangerous block number (n1, n2, ···nn) is recorded;

[0037] Based on the numerical simulation results, the potential risk area of ​​surrounding rock block collapse disaster in front of the tunnel face is analyzed. Figure 3 shown.

[0038] The present invention solves the problem of risk analysis and prediction of collapse disasters of surrounding rock blocks in jointed rock tunnels. It integrates seismic wave detection data, adopts a three-dimensional discontinuous deformation analysis method, simulates the deformation and movement process of surrounding rock blocks after tunnel excavation is completed, and monitors the vertical displacement of each block in real time, identifies the position of dangerous blocks in the tunnel, and provides a basis for the prevention and control of collapse disasters of dangerous blocks in the tunnel.

[0039] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0040] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0041] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0042] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0044] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A method for analyzing the discontinuous deformation of tunnel surrounding rock stability, characterized in that: The following steps are involved: The seismic wave signal is emitted at the discontinuous structural surface such as the fault to generate the emission phenomenon, and the geometric parameters of the rock structure surface and the physical and mechanical parameters of the rock are analyzed based on the reflected signal; According to the analysis requirements, a three-dimensional discontinuous numerical calculation model is constructed, and the rock mass structural surface is added to the calculation model based on the obtained geometric parameters; Simulate the deformation and movement of surrounding rock blocks after tunnel excavation is completed, and monitor the vertical displacement of each block in real time. Blocks with vertical displacement greater than the set value are classified as collapsed blocks, otherwise they are safe blocks; Based on the simulation results, the high-risk areas of block collapse disasters in the surrounding rock in front of the tunnel face are predicted and analyzed.

2. A tunnel surrounding rock stability discontinuous deformation analysis method as claimed in claim 1, characterized in that: The geometric parameters include the inclination and dip angle of the rock mass structural surface.

3. A tunnel surrounding rock stability discontinuous deformation analysis method as claimed in claim 1, characterized in that: When constructing a three-dimensional non-continuous numerical calculation model, the model size, fixed points, loading points, monitoring points, joint parameters, hole parameters and ground stress are determined according to requirements.

4. A tunnel surrounding rock stability discontinuous deformation analysis method as claimed in claim 1, characterized in that: The specific process of simulating the deformation and movement of surrounding rock blocks after tunnel excavation is completed includes recording the initial position information of each block, applying ground stress to each block, and analyzing the displacement of each block using a three-dimensional discontinuous deformation analysis method.

5. A tunnel surrounding rock stability discontinuous deformation analysis method as claimed in claim 1, characterized in that: Record the number of each block whose vertical displacement is greater than the set value.

6. A tunnel surrounding rock stability discontinuous deformation analysis system, characterized in that: include: Seismic wave prediction system, used to transmit seismic wave signals at discontinuous structural surfaces such as faults, and analyze the geometric parameters of rock mass structural surfaces and the physical and mechanical parameters of rocks based on the reflected signals; The model building module is configured to build a three-dimensional non-continuous numerical calculation model according to the analysis requirements, and add a rock mass structural surface to the calculation model according to the obtained geometric parameters; The motion simulation module is configured to simulate the deformation and movement of the surrounding rock blocks after the tunnel excavation is completed, and to monitor the vertical displacement of each block in real time. Blocks with vertical displacement greater than the set value are classified as collapsed blocks, otherwise they are safe blocks; The prediction and analysis module is configured to predict and analyze the high-risk area of ​​block collapse disaster in the surrounding rock in front of the tunnel face based on the simulation results.

7. A tunnel surrounding rock stability discontinuous deformation analysis system as claimed in claim 6, characterized in that: The geometric parameters of the seismic wave prediction system include the inclination and dip angle of the rock mass structural surface.

8. A tunnel surrounding rock stability discontinuous deformation analysis system as claimed in claim 6, characterized in that: The model building module is configured to determine the size, fixing points, loading points, monitoring points, joint parameters, hole parameters and ground stress of the model according to requirements when building a three-dimensional non-continuous numerical calculation model.

9. A tunnel surrounding rock stability discontinuous deformation analysis system as claimed in claim 6, characterized in that: The motion simulation module is configured to simulate the deformation and movement of surrounding rock blocks after tunnel excavation. The specific process includes recording the initial position information of each block, applying ground stress to each block, and analyzing the displacement of each block using a three-dimensional discontinuous deformation analysis method.

10. A tunnel surrounding rock stability discontinuous deformation analysis system as claimed in claim 6, characterized in that: The motion simulation module is configured to record the serial number of each block whose vertical displacement is greater than a set value.

Images