Surrounding rock influence zone partition method and device

Abstract

This disclosure provides a method and apparatus for zoning the surrounding rock influence zone, relating to the field of civil engineering. The method includes: obtaining the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone; constructing a numerical model of the internal structural zoning of the fault zone based on the geometric parameters and geotechnical parameters of different strata within the fault zone, and selecting a preset displacement curve model; determining the internal structural zoning of the fault zone based on the numerical model of the internal structural zoning; applying fault displacement to the internal structural zoning of the fault zone according to the preset displacement curve model, performing numerical calculations to obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch; and zoning the surrounding rock influence zone according to the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, obtaining the zoning results of the surrounding rock influence zone.

Description

Technical Field

[0001] This disclosure belongs to the field of civil engineering technology, and in particular relates to a method, apparatus, electronic equipment and medium for zoning the influence zone of surrounding rock. Background Technology

[0002] Active faults not only cause earthquakes, but their displacement also leads to permanent ground shifts, which can significantly impact tunnel structures due to differential movement on either side of the fault zone. An active fault, also known as a live fault, is a geological phenomenon where rock or soil layers in the Earth's crust undergo displacement relative to a specific cross-section over a recent period under in-situ stress. Since the design length of a tunnel passing through an active fault is a crucial parameter directly affecting the structural safety of tunnels passing through active faults, appropriate and targeted design measures are necessary.

[0003] In related technologies, research on the design length of tunnels with active faults has neglected the internal structural zoning of the fault zone and its fault displacement mode. Usually, the model of direct relative movement between the fault zone and the active side of the fault is adopted. However, this model does not match the actual situation and lacks systematic analysis and research on the influence of active fault zone parameters on the design length of tunnels with active faults. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, device, electronic equipment, and medium for zoning the surrounding rock influence zone, in order to provide a unified and quantitative method for determining the value of the fortification length.

[0005] In a first aspect, embodiments of this disclosure provide a method for zoning the surrounding rock influence zone, the method comprising: Obtain the geometric parameters of the fault zone, as well as the geotechnical parameters of different strata within the fault zone; Based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, a numerical model of the structural partitions within the fault zone is constructed, and a preset displacement curve model is selected. Based on the numerical model of the internal structural partitions of the fault zone, the internal structural partitions of the fault zone are determined. Based on the preset displacement curve model, fault displacement is applied to the internal structural partition of the fracture zone, and numerical calculations are performed to obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch. Based on the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, the surrounding rock influence zone is divided into zones to obtain the zoning results of the surrounding rock influence zone.

[0006] As an optional embodiment of this disclosure, the internal structural partitions of the fracture zone include: hanging wall, hanging wall, fracture zone, fracture zone core, fracture zone rupture surface, and fracture zone influence zone.

[0007] As an optional implementation of this disclosure, the step of applying fault displacement to the internal structural partitions of the fracture zone according to the preset displacement curve model includes: A displacement along the fault slip direction is applied to the boundary of the upper plate; Fault displacement is applied at the boundary of the fracture surface of the fracture zone according to the preset displacement curve model.

[0008] As an optional implementation of this disclosure, the step of selecting a preset displacement curve model includes: Based on geological exploration data, the horizontal fortification length and the vertical fortification length of the fault zone are obtained. Based on the horizontal and vertical fortification lengths of the fault zone and historical experience data, a preset displacement curve model is selected; the preset displacement curve model is a displacement curve model that conforms to the actual exploration.

[0009] As an optional embodiment of this disclosure, obtaining the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone includes: Obtain the geometric parameters of the fault zone; the geometric parameters of the fault zone include: the width of the fault zone, the dip angle of the fault zone, the dip direction of the fault zone, the partition width of different lithologies within the fault zone, and the location of the fracture surface of the fault zone. The geotechnical parameters of different strata within the fault zone are obtained; the geotechnical parameters of different strata within the fault zone include: lithology, surrounding rock grade, density, compressive strength, elastic modulus, Poisson's ratio, tensile strength, friction angle, and cohesion.

[0010] As an optional implementation of this disclosure, the zoning results of the surrounding rock influence zone include: a strongly influenced zone and a significantly influenced zone; The strongly affected zone is the area extending from the fracture surface of the fracture zone, including the core of the fracture zone, and the location where strain or relative deformation first decreases in the strain dissipation zone. The significant influence zone is defined as the area starting from the location where strain or relative deformation is minimal in the strain dissipation zone, including the fault zone influence zone, and extending to the location where the surrounding rock of the hanging wall or the footwall is deformed and strained due to the fault zone's dislocation and traction.

[0011] As an optional implementation of this disclosure, the preset displacement curve model is represented by the following formula:

[0012] in, This represents the displacement model of the pre-defined fault zone. This indicates the maximum value of the fault zone displacement. This indicates the width of the fracture zone. It represents the position of any point in the normalized coordinate system.

[0013] Secondly, embodiments of this disclosure provide a rock impact zone zoning device, the device comprising: The acquisition module is used to acquire the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone. The construction module is used to construct a numerical model of the internal structural partitions of the fault zone based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, and to select a preset displacement curve model. The determination module is used to determine the internal structural partitions of the fault zone based on a numerical model of the internal structural partitions of the fault zone. The calculation module is used to apply fault displacement to the internal structural partition of the fracture zone according to the preset displacement curve model, perform numerical calculations, and obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch. The partitioning module is used to partition the surrounding rock influence zone according to the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, and obtain the partitioning results of the surrounding rock influence zone.

[0014] As an optional embodiment of this disclosure, the internal structural partitions of the fracture zone include: hanging wall, hanging wall, fracture zone, fracture zone core, fracture zone rupture surface, and fracture zone influence zone.

[0015] As an optional implementation of this disclosure, the computing module is specifically used for: A displacement along the fault slip direction is applied to the boundary of the upper plate; Fault displacement is applied at the boundary of the fracture surface of the fracture zone according to the preset displacement curve model.

[0016] As an optional implementation of this disclosure, the construction module is specifically used for: Based on geological exploration data, the horizontal fortification length and the vertical fortification length of the fault zone are obtained. Based on the horizontal and vertical fortification lengths of the fault zone and historical experience data, a preset displacement curve model is selected; the preset displacement curve model is a displacement curve model that conforms to the actual exploration.

[0017] As an optional implementation of this disclosure, the acquisition module is specifically used for: Obtain the geometric parameters of the fault zone; the geometric parameters of the fault zone include: the width of the fault zone, the dip angle of the fault zone, the dip direction of the fault zone, the partition width of different lithologies within the fault zone, and the location of the fracture surface of the fault zone. The geotechnical parameters of different strata within the fault zone are obtained; the geotechnical parameters of different strata within the fault zone include: lithology, surrounding rock grade, density, compressive strength, elastic modulus, Poisson's ratio, tensile strength, friction angle, and cohesion.

[0018] As an optional implementation of this disclosure, the zoning results of the surrounding rock influence zone include: a strongly influenced zone and a significantly influenced zone; The strongly affected zone is the area extending from the fracture surface of the fracture zone, including the core of the fracture zone, and the location where strain or relative deformation first decreases in the strain dissipation zone. The significant influence zone is defined as the area starting from the location where strain or relative deformation is minimal in the strain dissipation zone, including the fault zone influence zone, and extending to the location where the surrounding rock of the hanging wall or the footwall is deformed and strained due to the fault zone's dislocation and traction.

[0019] As an optional implementation of this disclosure, the preset displacement curve model is represented by the following formula:

[0020] in, This represents the displacement model of the pre-defined fault zone. This indicates the maximum value of the fault zone displacement. This indicates the width of the fracture zone. It represents the position of any point in the normalized coordinate system.

[0021] Thirdly, embodiments of this disclosure provide an electronic device, including: a memory and a processor, wherein the memory is used to store a computer program; and the processor is used to execute the rock impact zone zoning method described in the first aspect or any embodiment of the first aspect when the computer program is invoked.

[0022] Fourthly, embodiments of this disclosure provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the rock impact zone zoning method described in the first aspect or any embodiment of the first aspect.

[0023] The method for zoning the surrounding rock influence zone provided in this embodiment obtains the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone; based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, a numerical model of the internal structural zoning of the fault zone is constructed, and a preset displacement curve model is selected; based on the numerical model of the internal structural zoning of the fault zone, the internal structural zoning of the fault zone is determined; fault displacement is applied to the internal structural zoning of the fault zone according to the preset displacement curve model, and numerical calculations are performed to obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch; based on the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, the surrounding rock influence zone is divided into zones, and the zoning results of the surrounding rock influence zone are obtained. By applying a preset displacement curve model and simulating the internal structural partitions of the fault zone, for example, the preset displacement curve model can be an "S"-shaped displacement mode. Since the linear displacement mode exhibits stress singularities at the soft-hard junction of the fault fracture zone and the surrounding rock of the non-fault fracture zone, the results obtained by the "S"-shaped displacement mode are more reasonable compared to the linear displacement mode. At the same time, since the strain distribution and relative displacement within the fault zone have their own partitioning characteristics, this compensates for the neglect of the internal structural partitions and fault displacement modes in the existing research results on the fortification length of overactive faults. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A flowchart of a method for zoning the surrounding rock influence zone provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of a fracture zone structure provided in an embodiment of the present disclosure; Figure 3 A schematic diagram of the normalized function properties of an "S"-shaped displacement curve model provided in an embodiment of this disclosure; Figure 4 This is a horizontal relative deformation curve of a tunnel surrounding rock excavation body crossing a fault zone, provided in one embodiment of this disclosure. Figure 5 This is a horizontal shear strain cloud diagram of a tunnel surrounding rock excavation body traversing a fault zone, provided in an embodiment of this disclosure. Figure 6 This is a schematic diagram of a structure for applying displacement to the internal structural partitions of a fracture zone according to an embodiment of the present disclosure; Figure 7 This is a schematic diagram of the zoning structure of the surrounding rock influence zone provided in an embodiment of this disclosure; Figure 8 A schematic diagram of a fracture example and its numerical model provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of a rock impact zone zoning device provided in an embodiment of the present disclosure; Figure 10 This is an internal structural diagram of an electronic device provided in one embodiment of the present disclosure. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0029] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0030] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner. Furthermore, in the description of the embodiments in this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0031] Surrounding rock: refers to the rock (soil) mass within a certain range around a tunnel that affects the stability of the tunnel body. In engineering geology, the rock mass within the range of redistribution stress influence is called surrounding rock, usually referring to rock mass within 3 times the tunnel diameter. Surrounding rock classification: Based on indicators such as the integrity of the rock mass and rock strength, an infinite sequence of rock masses is divided into a finite number of categories with different stability levels. That is, surrounding rocks with similar stability are grouped into one category, and all surrounding rocks are divided into several categories.

[0032] The inventive concept of this solution is as follows: In view of the shortcomings of existing analysis on the impact of the design length of tunnels on active faults, this disclosed embodiment combines numerical simulation of the actual structural partitioning inside the fault zone and applies S-shaped displacement boundaries to provide a partitioning method for the surrounding rock influence zone under the fault fault with geological partitioning structure. This method makes up for the neglect of the internal structural partitioning and fault displacement mode in the existing research results on the design length of active faults.

[0033] This disclosure provides a method for zoning the surrounding rock influence zone. Specifically, refer to... Figure 1 As shown, the method for zoning the surrounding rock influence zone provided in this embodiment includes the following steps S11-S15: S11. Obtain the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone.

[0034] Optionally, step S11 (obtaining the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone) includes: Obtain the geometric parameters of the fracture zone.

[0035] The geometric parameters of the fault zone include: the width of the fault zone, the dip angle of the fault zone, the dip direction of the fault zone, the width of the partition of different lithologies within the fault zone, and the location of the fracture surface of the fault zone.

[0036] Specifically, the geometric parameters of the fault zone are obtained based on the results of the on-site geological survey.

[0037] The geometric parameters of the fault zone include: fault zone width, fault zone dip angle, fault zone dip direction, the width of the zoning of different strata within the fault zone, and the location of the fault zone rupture surface.

[0038] In this embodiment of the disclosure, based on the results of the on-site geological survey, the following parameters can be selected: the width of the fault zone is 180 meters, the dip angle of the fault zone is 88°, the dip direction of the fault zone is 216°, the width of the inner core of the fault zone is 50 meters, the width of the single side of the influence zone within the fault zone is 65 meters, and the location of the rupture surface (with a width of 4 meters) of the fault zone is the center of the fault zone.

[0039] Obtain the geomechanical parameters of different strata within the fault zone.

[0040] The geotechnical parameters of different strata within the fault zone include: lithology, surrounding rock grade, density, compressive strength, elastic modulus, Poisson's ratio, tensile strength, friction angle, and cohesion.

[0041] Specifically, laboratory tests are conducted on the mechanical properties of rock samples within the fault zone. Simultaneously with step one, the identification of different lithologies within the fault zone is carried out. Based on the information obtained from geological surveys and laboratory tests, the geotechnical parameters of different lithologies within the fault zone are acquired, including: lithology, surrounding rock grade, density, compressive strength, elastic modulus, Poisson's ratio, tensile strength, friction angle, and cohesion.

[0042] Rock testing is a general term for determining various basic properties of rocks. The specific test content should be determined based on the type and scale of the project, its position and role in the national economy, and the engineering geological problems to be solved. The main indoor tests include: water content, solid density and density tests, deformation tests, uniaxial compressive strength tests, point load tests, shear strength tests (including direct shear tests and triaxial tests), and tensile tests.

[0043] For example, referring to Table 1, the geotechnical parameters of different strata within the fault zone are shown in Table 1.

[0044] Table 1

[0045] S12. Based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, construct a numerical model of the structural partitions within the fault zone, and select a preset displacement curve model.

[0046] Specifically, based on the geometric parameters and geotechnical parameters of different strata within the fault zone obtained in the above steps, numerical analysis software, such as FLAC-3D, is used to establish a numerical model of the internal structural partitions of the fault zone, including the fracture surface, fault core, and influence zone. Figure 2 As shown, Figure 2 This is a schematic diagram of the fracture zone structure. Based on current research on displacement patterns, the "S"-shaped displacement curve that best approximates the actual exploration was selected.

[0047] Optionally, the above steps (selecting a preset displacement curve model) can be implemented in the following way: Based on geological exploration data, the horizontal fortification length and the vertical fortification length of the fault zone are obtained.

[0048] For example, based on the site safety assessment report, engineering geological conditions, and engineering fortification requirements, a calculation scheme for the active fault displacement is determined. Specifically, the active fault is displaced by 4 meters horizontally and 1.5 meters vertically, with the displacement pattern set as an "S"-shaped displacement pattern. That is, the horizontal fortification length of the fault zone is determined to be 4 meters, and the vertical fortification length is determined to be 1.5 meters.

[0049] Based on the horizontal and vertical fortification lengths of the fault zone and historical experience data, a preset displacement curve model is selected.

[0050] Among them, the preset displacement curve model can be selected from the "S"-shaped displacement curve model that is closest to the actual exploration.

[0051] In some embodiments, the preset displacement curve model is represented by the following formula:

[0052] in, This represents the displacement model of the pre-defined fault zone. This indicates the maximum value of the fault zone displacement. This indicates the width of the fracture zone. It represents the position of any point in the normalized coordinate system.

[0053] For example, when the horizontal fortification length of the fault zone is 4 meters, You can take 4 meters. 180 meters can be taken. (Refer to...) Figure 3 As shown, Figure 3 This is a schematic diagram of the normalized function properties of the "S"-shaped displacement curve model.

[0054] S13. Based on the numerical model of the internal structural partitions of the fault zone, determine the internal structural partitions of the fault zone.

[0055] Optionally, the internal structural partitions of the fracture zone include: hanging wall, footwall, fracture zone, fracture zone core, fracture surface, and fracture zone influence zone.

[0056] Specifically, a fracture zone is a collective term for the aggregate of a fracture zone core, a fracture surface, and an influence zone. The fracture surface is located in the center, flanked by the core, and further flanked by the influence zones. Therefore, its geometric relationship is: influence zone - fracture zone core - fracture surface - fracture zone core - influence zone.

[0057] The hanging wall is a geological term, referring to one of the two sides of a fault. The distinction between hanging wall and footwall only exists in dipping faults. When the fault plane is dipping, the side facing upwards is called the footwall, and the side facing downwards is called the hanging wall.

[0058] Fault zone: The zone consisting of the core of the fault zone and the fractured rock masses on both sides. In this embodiment of the disclosure, the fractured rock masses on both sides are referred to as the fault zone influence zone.

[0059] The core of the fault zone: The core area of ​​the fault zone consists of the fracture surface of the fault zone and the fractured rock mass that has undergone significant extension, compression and twisting processes under its influence.

[0060] Fault zone fracture surface: A structural feature in which the crustal rock strata undergo relative dislocation on both sides along a plane.

[0061] To further understand the concepts of fault core, fault rupture surface, and fault influence zone, please refer to the following explanation: When an earthquake occurs within a fault zone, relative movement occurs on both sides of this surface (such as one side moving upwards or horizontally). This surface will rupture, hence the name "rupture surface." From a mechanical perspective, the rupture surface, due to the rupture, exhibits the most fragmented rock and soil mass, resulting in the worst mechanical parameters. Fault core: The areas on both sides of the rupture surface undergo significant strain due to the pulling motion caused by the rupture surface, resulting in relatively fragmented rock and soil mass with poor mechanical parameters. Fault influence zone: The areas on both sides of the core are less affected by the pulling force, therefore the mechanical parameters of the rock and soil mass are relatively poor.

[0062] Dip angle: The angle between the true dip line on a rock stratum and its projection onto the horizontal plane is called the dip angle. It represents the angle between the stratum and the horizontal plane on a vertical cross-section perpendicular to the strike of the fault.

[0063] Dip: A line perpendicular to the strike line on a fault plane is called a dip line or true dip line. The direction in which its projection on the horizontal plane points downward along the plane is the dip of the fault.

[0064] Strike: The line where the fault plane intersects the horizontal plane is called the strike line, and the direction in which the strike line extends is the strike of the fault. It indicates the direction in which the rock strata extend on the ground.

[0065] For example, refer to Figure 2 As shown, Figure 2 This is a schematic diagram of a fracture zone structure. For explanations of the above geological terms, please refer to [link / reference needed]. Figure 2 To understand.

[0066] S14. Apply fault displacement to the internal structural partition of the fracture zone according to the preset displacement curve model, perform numerical calculations, and obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch.

[0067] Specifically, after completing the above steps using numerical calculation software, the displacement, stress, and strain distribution results of the surrounding rock in the calculated model—that is, the three-dimensional geological model after the active fault has displaced—can be obtained. As needed, the horizontal relative deformation data of the surrounding rock in the tunnel excavation and the horizontal shear strain data of the surrounding rock at the tunnel arch can be extracted, and then corresponding curves can be plotted using the results. The horizontal relative deformation of the surrounding rock refers to the component of the relative deformation of the surrounding rock in the horizontal direction. (Refer to...) Figure 4 and Figure 5 As shown, Figure 4 The horizontal relative deformation curve of the tunnel surrounding rock excavation body crossing a fault zone; Figure 5 This is a contour map of the horizontal shear strain of the excavated rock surrounding the tunnel traversing a fault zone.

[0068] In some embodiments, the above step (applying fault displacement to the internal structural partitions of the fracture zone according to the preset displacement curve model) can be implemented in the following manner: A displacement along the fault slip direction is applied to the boundary of the upper plate; Fault displacement is applied at the boundary of the fracture surface of the fracture zone according to the preset displacement curve model.

[0069] Specifically, based on the safety assessment report of the engineering site, a fault faulting scheme is determined, thereby simulating possible fault faulting under actual conditions. Based on the fault faulting mechanics mechanism, displacement conditions at the boundaries of the numerical calculation model are set using numerical software. Fixing the lower boundary of the model means setting constraints at the boundaries of the lower boundary of the model to make the displacement at the lower boundary of the model equal to zero. Constraining the normal displacement on the left and right sides of the upper plate means setting the normal displacement at the left and right boundaries of the upper plate to zero.

[0070] For example, to simulate the dislocation of the surrounding rock on both sides of the fault fracture zone, a uniform displacement along the fault slip direction is applied to the top boundary of the hanging wall, and a fault fault displacement is applied at the boundary of the fault fracture zone according to the displacement mode ω, followed by numerical calculations. (Refer to...) Figure 6 As shown, Figure 6 A schematic diagram of a structure in which displacement is applied to the internal structural zones of a fault zone.

[0071] S15. Based on the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, the surrounding rock influence zone is divided into zones to obtain the zoning results of the surrounding rock influence zone.

[0072] The zoning results of the surrounding rock influence zone include: a strongly influenced zone and a significantly influenced zone.

[0073] The strongly affected zone is the area extending from the fracture surface of the fracture zone, including the core of the fracture zone, and the location where strain or relative deformation first decreases in the strain dissipation zone. The significant influence zone is defined as the area starting from the location where strain or relative deformation is minimal in the strain dissipation zone, including the fault zone influence zone, and extending to the location where the surrounding rock of the hanging wall or the footwall is deformed and strained due to the fault zone's dislocation and traction.

[0074] Specifically, the zoning of the surrounding rock influence zone is divided into two areas: a strongly influenced zone and a significantly influenced zone. The lengths of the corresponding influence zone zones are also given, and appropriate engineering measures for the tunnel are designed based on these different lengths. The tunnel excavation body refers to the portion of the surrounding rock that has been removed by the tunnel, excluding the tunnel lining. (Refer to...) Figure 7 As shown, Figure 7 This is a schematic diagram illustrating the zoning structure of the surrounding rock influence zone. (Refer to...) Figure 8 As shown, Figure 8 This is a schematic diagram of a fracture instance and its numerical model.

[0075] For example, the strongly affected zone extends from the fracture surface, encompassing the entire core of the fault zone, with the boundary at the point where strain or relative deformation first decreases in the strain dissipation zone. In this example, the boundary extends 5m upwards and downwards from the core of the fault zone. The significantly affected zone begins at the point where strain or relative deformation reaches its minimum in the strain dissipation zone, covers the affected area, and extends to the range where the surrounding rock of the hanging wall and footwall is subjected to the fault zone's fault-induced stress, resulting in relatively significant deformation and strain. In this example, the boundary extends 25m upwards from the affected zone and 12m downwards from the affected zone.

[0076] The method for zoning the surrounding rock influence zone provided in this embodiment obtains the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone; based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, a numerical model of the internal structural zoning of the fault zone is constructed, and a preset displacement curve model is selected; based on the numerical model of the internal structural zoning of the fault zone, the internal structural zoning of the fault zone is determined; fault displacement is applied to the internal structural zoning of the fault zone according to the preset displacement curve model, and numerical calculations are performed to obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch; based on the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, the surrounding rock influence zone is divided into zones, and the zoning results of the surrounding rock influence zone are obtained. By applying a preset displacement curve model and simulating the internal structural partitions of the fault zone, for example, the preset displacement curve model can be an "S"-shaped displacement mode. Since the linear displacement mode exhibits stress singularities at the soft-hard junction of the fault fracture zone and the surrounding rock of the non-fault fracture zone, the results obtained by the "S"-shaped displacement mode are more reasonable compared to the linear displacement mode. At the same time, since the strain distribution and relative displacement within the fault zone have their own partitioning characteristics, this compensates for the neglect of the internal structural partitions and fault displacement modes in the existing research results on the fortification length of overactive faults.

[0077] This disclosure provides a rock influence zone zoning device for executing any of the rock influence zone zoning methods provided in the above embodiments, and has the corresponding beneficial effects of the rock influence zone zoning method.

[0078] Figure 9 This is a schematic diagram of a rock impact zone zoning device provided in an embodiment of the present disclosure, as shown below. Figure 9 As shown, the surrounding rock influence zone zoning device includes: acquisition module 910, construction module 920, determination module 930, calculation module 940, and zoning module 950.

[0079] The acquisition module 910 is used to acquire the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone. The construction module 920 is used to construct a numerical model of the internal structural partition of the fault zone based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, and to select a preset displacement curve model. The determination module 930 is used to determine the internal structural partitions of the fault zone based on a numerical model of the internal structural partitions of the fault zone. The calculation module 940 is used to apply fault displacement to the internal structural partition of the fracture zone according to the preset displacement curve model, perform numerical calculations, and obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch. The partitioning module 950 is used to partition the surrounding rock influence zone according to the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, and obtain the partitioning result of the surrounding rock influence zone.

[0080] As an optional embodiment of this disclosure, the internal structural partitions of the fracture zone include: hanging wall, hanging wall, fracture zone, fracture zone core, fracture zone rupture surface, and fracture zone influence zone.

[0081] As an optional implementation of this disclosure, the computing module is specifically used for: A displacement along the fault slip direction is applied to the boundary of the upper plate; Fault displacement is applied at the boundary of the fracture surface of the fracture zone according to the preset displacement curve model.

[0082] As an optional implementation of this disclosure, the construction module is specifically used for: Based on geological exploration data, the horizontal fortification length and the vertical fortification length of the fault zone are obtained. Based on the horizontal and vertical fortification lengths of the fault zone and historical experience data, a preset displacement curve model is selected; the preset displacement curve model is a displacement curve model that conforms to the actual exploration.

[0083] As an optional implementation of this disclosure, the acquisition module is specifically used for: Obtain the geometric parameters of the fault zone; the geometric parameters of the fault zone include: the width of the fault zone, the dip angle of the fault zone, the dip direction of the fault zone, the partition width of different lithologies within the fault zone, and the location of the fracture surface of the fault zone. The geotechnical parameters of different strata within the fault zone are obtained; the geotechnical parameters of different strata within the fault zone include: lithology, surrounding rock grade, density, compressive strength, elastic modulus, Poisson's ratio, tensile strength, friction angle, and cohesion.

[0084] As an optional implementation of this disclosure, the zoning results of the surrounding rock influence zone include: a strongly influenced zone and a significantly influenced zone; The strongly affected zone is the area extending from the fracture surface of the fracture zone, including the core of the fracture zone, and the location where strain or relative deformation first decreases in the strain dissipation zone. The significant influence zone is defined as the area starting from the location where strain or relative deformation is minimal in the strain dissipation zone, including the fault zone influence zone, and extending to the location where the surrounding rock of the hanging wall or the footwall is deformed and strained due to the fault zone's dislocation and traction.

[0085] As an optional implementation of this disclosure, the preset displacement curve model is represented by the following formula:

[0086] in, This represents the displacement model of the pre-defined fault zone. This indicates the maximum value of the fault zone displacement. This indicates the width of the fracture zone. It represents the position of any point in the normalized coordinate system.

[0087] Specific limitations regarding the zoning device for the surrounding rock influence zone can be found in the limitations of the zoning method for the surrounding rock influence zone mentioned above, and will not be repeated here. Each module in the aforementioned zoning device for the surrounding rock influence zone can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in an electronic device, or stored in the memory of an electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0088] In one embodiment, an electronic device is provided, the internal structure of which can be shown as follows: Figure 10 As shown, the electronic device includes a processor, memory, and communication interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface is used for wired or wireless communication with external electronic devices; wireless communication can be achieved through WiFi, carrier networks, near-field communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a method for zoning the surrounding rock influence zone.

[0089] Those skilled in the art will understand that Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present disclosure and does not constitute a limitation on the electronic device to which the present disclosure is applied. A specific electronic device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0090] In one embodiment, the surrounding rock influence zone zoning device provided in this disclosure can be implemented as a computer program, which can be implemented as follows: Figure 10 The electronic device shown is in operation. The memory of the electronic device can store the various program modules of the surrounding rock influence zone zoning device that make up the electronic device, for example, Figure 9 The diagram shows an acquisition module 910, a construction module 920, a determination module 930, a calculation module 940, and a partitioning module 950. The computer program comprised of these modules causes a processor to execute the steps in the rock influence zone partitioning method for the electronic device of the various embodiments of this disclosure described herein.

[0091] In one embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the steps in the above method embodiments.

[0092] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, databases, or other media used in the embodiments provided in this disclosure 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, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static random access memory (SRAM) and dynamic random access memory (DRAM), etc.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0094] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for zoning the influence zone of surrounding rock, characterized in that, The method includes: Obtain the geometric parameters of the fault zone, as well as the geotechnical parameters of different strata within the fault zone; Based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, a numerical model of the structural partitions within the fault zone is constructed, and a preset displacement curve model is selected. Based on the numerical model of the internal structural partitions of the fault zone, the internal structural partitions of the fault zone are determined. Based on the preset displacement curve model, fault displacement is applied to the internal structural partition of the fracture zone, and numerical calculations are performed to obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch. Based on the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, the surrounding rock influence zone is divided into zones to obtain the zoning results of the surrounding rock influence zone. The selection of the preset displacement curve model includes: Based on geological exploration data, the horizontal fortification length and the vertical fortification length of the fault zone are obtained. Based on the horizontal fortification length of the fault zone, the vertical fortification length of the fault zone, and historical experience data, a preset displacement curve model is selected; the preset displacement curve model is a displacement curve model that conforms to the actual exploration. The preset displacement curve model is represented by the following formula: in, This represents the displacement model of the pre-defined fault zone. This indicates the maximum value of the fault zone displacement. This indicates the width of the fracture zone. It represents the position of any point in the normalized coordinate system.

2. The method according to claim 1, characterized in that, The internal structural partitions of the fault zone include: hanging wall, footwall, fault zone, fault zone core, fault zone rupture surface, and fault zone influence zone.

3. The method according to claim 2, characterized in that, The step of applying fault displacement to the internal structural partitions of the fault zone according to the preset displacement curve model includes: A displacement along the fault slip direction is applied to the boundary of the upper plate; Fault displacement is applied at the boundary of the fracture surface of the fracture zone according to the preset displacement curve model.

4. The method according to claim 1, characterized in that, The acquisition of the geometric parameters of the fault zone, and the geotechnical parameters of different strata within the fault zone, includes: Obtain the geometric parameters of the fault zone; the geometric parameters of the fault zone include: the width of the fault zone, the dip angle of the fault zone, the dip direction of the fault zone, the partition width of different lithologies within the fault zone, and the location of the fracture surface of the fault zone. The geotechnical parameters of different strata within the fault zone are obtained; the geotechnical parameters of different strata within the fault zone include: lithology, surrounding rock grade, density, compressive strength, elastic modulus, Poisson's ratio, tensile strength, friction angle, and cohesion.

5. The method according to claim 2, characterized in that, The zoning results of the surrounding rock influence zone include: a strongly influenced zone and a significantly influenced zone; The strongly affected zone is the area extending from the fracture surface of the fracture zone, including the core of the fracture zone, and the location where strain or relative deformation first decreases in the strain dissipation zone. The significant influence zone is defined as the area starting from the location where strain or relative deformation is minimal in the strain dissipation zone, including the fault zone influence zone, and extending to the location where the surrounding rock of the hanging wall or the footwall is deformed and strained due to the fault zone's dislocation and traction.

6. A zoning device for the influence zone of surrounding rock, characterized in that, include: The acquisition module is used to acquire the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone. The construction module is used to construct a numerical model of the internal structural partitions of the fault zone based on the geometric parameters of the fault zone and the geotechnical parameters of different strata within the fault zone, and to select a preset displacement curve model. The determination module is used to determine the internal structural partitions of the fault zone based on a numerical model of the internal structural partitions of the fault zone. The calculation module is used to apply fault displacement to the internal structural partition of the fracture zone according to the preset displacement curve model, perform numerical calculations, and obtain the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch. The partitioning module is used to partition the surrounding rock influence zone according to the horizontal relative deformation curve of the surrounding rock of the tunnel excavation body and the horizontal shear strain curve of the surrounding rock at the tunnel arch, and obtain the partitioning result of the surrounding rock influence zone. The selection of the preset displacement curve model includes: Based on geological exploration data, the horizontal fortification length and the vertical fortification length of the fault zone are obtained. Based on the horizontal fortification length of the fault zone, the vertical fortification length of the fault zone, and historical experience data, a preset displacement curve model is selected; the preset displacement curve model is a displacement curve model that conforms to the actual exploration. The preset displacement curve model is represented by the following formula: in, This represents the displacement model of the pre-defined fault zone. This indicates the maximum value of the fault zone displacement. This indicates the width of the fracture zone. It represents the position of any point in the normalized coordinate system.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the rock influence zone zoning method according to any one of claims 1 to 5.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the rock impact zone partitioning method according to any one of claims 1 to 5.

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