Information processing device and information processing method

Abstract

To provide information that is useful for adjusting construction plans according to the hardness and softness of the ground and a state of soil.SOLUTION: A model processing unit refers to drilling data showing distribution of drilling input energy for each drilling point, identifies change points where the amount of change in the drilling input energy in the excavation direction is greater than a predetermined change amount threshold, and determines a boundary surface passing through change points where a change trend of the drilling input energy is common among three or more drilling points. The embodiment of the present application can be realized by any form, including an information processing device and an information processing method.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to an information processing device and an information processing method. [Background technology]

[0002] In mountain tunnel construction, it is important to understand the condition of the surrounding ground, including ahead of the tunnel face, in order to ensure the safety of construction in unstable areas such as fractured zones and to implement countermeasure work accurately and without delay. When investigating the condition ahead of the tunnel face, well-drilling logging is used at many construction sites. Well-drilling logging refers to the exploration of changes in the hardness and softness of the ground and geological conditions using drilling data obtained by drilling holes in the rock mass. This method allows for the understanding of the strength distribution of the rock mass relatively easily and at low cost. Furthermore, technologies have been proposed for spatially visualizing the ground and rock mass using drilling data (e.g., Patent Documents 1 and 2) and methods for calculating ground strength from drilling data (e.g., Patent Documents 3 and 4). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 4-161588 [Patent Document 2] Japanese Patent Publication No. 2022-169055 [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-161964 [Patent Document 4] Japanese Patent Application Publication No. 2023-003119 [Patent Document 5] Japanese Patent Publication No. 2022-141080 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Documents 2 and 5 describe a method for creating a three-dimensional geological model based on drilling input energy data obtained from multiple locations using geostatistical methods such as kriging interpolation and the values ​​obtained by converting the data into strength data. Because drilling input energy data can be obtained with a relatively fine resolution, it is useful for detecting small changes in rock mass properties relative to the entire rock face, such as hard rock blocks (e.g., 1-2 m in diameter) or thin faults or fractured areas (e.g., 1 m thick). However, at construction sites, rather than small changes in properties, it is sometimes more important to predict the location of major rock mass boundary changes that may require changes in the pre-designed support pattern, locations where additional auxiliary construction methods need to be considered, and risks at boundary areas.

[0005] The present application has been made in consideration of the above circumstances, and one of its objectives is to provide information that is useful in adjusting construction plans according to the hardness and softness of the ground and the state of the geological features. [Means for solving the problem]

[0006] (1) One aspect of the present application is an information processing device that includes a model processing unit that refers to drilling data showing the distribution of drilling input energy for each drilling point, identifies change points where the change in the drilling input energy in the excavation direction is greater than a predetermined change threshold, and determines a boundary surface that passes through change points where the change trend of the drilling input energy is common between three or more drilling points.

[0007] (2) One aspect of the present application is an information processing method in which an information processing device executes the steps of: referring to drilling data showing the distribution of drilling input energy for each drilling point; identifying a change point at which the change in the drilling input energy in the excavation direction is greater than a predetermined change threshold; and determining a boundary surface passing through a change point at which the change trend of the drilling input energy is common among three or more drilling points. [Effects of the Invention]

[0008] According to the embodiment of the present application, it is possible to provide information that is useful for adjusting the construction plan according to the hardness and softness of the ground and the state of the soil. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of a functional configuration of an information processing system according to an embodiment of the present invention. [Figure 2] 1 is a schematic block diagram illustrating an example of a functional configuration of an information processing device according to an embodiment of the present invention. [Figure 3] FIG. 2 is a schematic block diagram illustrating an example of the functional configuration of a model processing unit according to the present embodiment. [Figure 4] FIG. 10 is a diagram illustrating an example of change points in drilling input energy. [Figure 5] FIG. 10 is a diagram illustrating an example of a boundary surface passing through a change point in drilling input energy. [Figure 6] FIG. 1 is a diagram illustrating layers sandwiched between interfaces. [Figure 7] 10 is a flowchart illustrating an information processing procedure according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present embodiment will be described below with reference to the drawings. The information processing system S1 according to this embodiment analyzes the condition of the ground using drilling data obtained by excavation. The ground is, for example, the target of tunnel construction. The information processing system S1 identifies boundaries where the strength of the ground changes significantly, and visualizes the condition of the layers sandwiched between the identified boundaries and adjacent boundaries. The strength of the ground is reflected in the drilling input energy input during excavation. The visualized information is used to determine risks that may occur during construction, for construction planning or adjustments, and so on. In construction planning, for example, support patterns to be set up at the construction site, the addition of auxiliary construction methods, etc. may be considered.

[0011] FIG. 1 is a diagram showing an example of the functional configuration of an information processing system S1 according to this embodiment. The information processing system S1 includes an exploration system 10 and an information processing device 20. The exploration system 10 and the information processing device 20 are connected wirelessly or via a wire so that they can send and receive various types of data. In the example of FIG. 1, the exploration system 10 and the information processing device 20 are connected using a network NW, but they may also be connected directly. The network NW may be any one of a public communication network, the Internet, a dedicated line, a local area network, etc., or a combination of any of these. Furthermore, in the example of FIG. 1, the number of information processing devices 20 is one, but there may be two or more.

[0012] The exploration system 10 conducts drilling logging to explore the hardness and softness of the ground and the geological conditions ahead of the tunnel face. The tunnel face refers to the cross section of the tunnel or the drilling surface. The exploration system 10 has one or more drilling machines (not shown) and one or more server devices (not shown). The drilling machine excavates the ground at the drilling point. The server device sequentially acquires drilling data indicating the excavation status of the ground from the drilling machine. The server device is installed, for example, in an office at the construction site. The server device is installed at the construction company's main business premises and stores various data. The stored data may include, for example, drilling data as well as a three-dimensional geological model of the area near the construction site.

[0013] The drilling machine has a thrust and a cutter head, and the cutter head is rotated by the thrust and pressed against the drilling surface. The drilling machine is equipped with instruments for measuring its operating status and stores drilling data indicating its operating status in a server device. The drilling data includes, for example, the thrust thrust, excavation volume, cutter torque, cutter head rotation speed, and three-dimensional coordinates of the excavation point for each predetermined time period. The server device calculates the drilling input energy per excavation volume from the acquired drilling data. The drilling input energy includes a thrust component and an excavation component for each predetermined time period. The thrust component is obtained by dividing the excavation length and the thrust thrust by the excavation volume. The excavation component is obtained by dividing the product of the cutter torque, cutter head rotation speed, and excavation length by the product of the thrust speed and the excavation volume. The excavation length corresponds to the coordinate displacement from the excavation point at the previous time to the excavation point at the current time. The thrust speed is obtained by dividing the displacement of the excavation point by the time interval between the previous time and the current time. The server device associates the three-dimensional coordinates of each drilling point with the drilling input energy, stores the data, and stores the data in the drilling data. The drilling input energy is handled three-dimensionally in association with each drilling point distributed in the drilling direction for each drilling point.

[0014] In this embodiment, it is sufficient to obtain drilling data showing the distribution of drilling input energy for each of three or more drilling points. The drilling length is typically about 20 to 30 m. In tunnel exploration, for example, the center, right and left sides of the tunnel face, or the center, upper half and lower half of the tunnel face are used as drilling points, but this is not limited to this.

[0015] Next, a description will be given of an example of the functional configuration of the information processing device 20 according to this embodiment. Fig. 2 is a schematic block diagram showing an example of the functional configuration of the information processing device 20 according to this embodiment. The information processing device 20 includes a control unit 22, a communication unit 24, an input unit 26, and a display unit . The information processing device 20 may be configured as a general-purpose information terminal device such as a personal computer, a tablet terminal device, or a mobile phone, or may be configured to include dedicated hardware.

[0016] The control unit 22 performs processing and control for realizing various functions of the information processing device 20. The control unit 22 includes a model processing unit 222, a display processing unit 224, and a setting unit 226. The model processing unit 222 acquires drilling data from the server device of the exploration system 10 (FIG. 1) using the communication unit 24. The model processing unit 222 refers to the acquired drilling data and identifies, for each drilling point, a change point where the amount of change in the drilling input energy in the excavation direction is greater than a predetermined change amount threshold. The model processing unit 222 determines a boundary surface that passes through a change point where the change trend in the drilling input energy is common between three or more drilling points. The model processing unit 222 may also identify layers sandwiched between adjacent boundary surfaces in the excavation direction. A more specific example of the functional configuration of the model processing unit 222 will be described later.

[0017] The display processing unit 224 configures various display screens and generates display data showing the configured display screens. The display processing unit 224 outputs the generated display data to the display unit 28. By outputting this display data, the display processing unit 224 displays the display screens. The display processing unit 224 may configure a display screen showing the three-dimensional shape of the identified surface or layer and display it on the display unit 28.

[0018] The setting unit 226 sets parameters related to various processes performed by the model processing unit 222 in the model processing unit 222. For example, the model processing unit 222 can set a value whose absolute value is smaller than the difference between the drilling input energy values ​​for each pair of strata previously acquired near the construction site as the threshold value for the change in drilling input energy. The threshold value for the change in drilling input energy may be fixed to a predetermined constant value, or the setting unit 226 may, for example, display a setting screen on the display unit 28 and set a setting value instructed by an operation signal input from the input unit 26 in response to an operation as the threshold value for the drilling input energy. The setting screen may, for example, have a display field and an input field for the setting value for each setting item, or may have a screen component (e.g., a dial, a slider bar, etc.) that displays the setting value and allows the setting value to be adjusted in response to an operation. This allows a user, such as a geological engineer or a supervisor, to set a threshold value for the change in drilling input energy appropriate for the conditions of the construction site.

[0019] The communication unit 24 inputs and outputs various data to and from other devices via wired or wireless connections. The communication unit 24, for example, connects to a server device of the exploration system 10 (FIG. 1) via the network NW and receives drilling data from the server device. The communication unit 24 outputs the received drilling data to the control unit 22. The communication unit 24 includes, for example, a communication interface. The communication unit 24 may also be directly connected to other devices so as to be able to send and receive data without using the network NW. The input unit 26 receives a user operation and generates an operation signal in accordance with the received operation. The input unit 26 outputs the generated operation signal to the control unit 22. The input unit 26 may have a general-purpose input device such as a mouse or a touch sensor, or may have a dedicated input device such as a button, a lever, or a dial.

[0020] The display unit 28 displays a display screen indicated by display data input from the control unit 22. The display unit 28 may have any type of display monitor, such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display. 2, one or both of the input unit 26 and the display unit 28 may be configured integrally as part of the information processing device 20, or may be configured separately from the information processing device 20. The touch sensor that constitutes the input unit 26 and the display that constitutes the display unit 28 may be configured separately, or may be configured integrally as a touch panel.

[0021] Next, a more specific example of the functional configuration of the model processing unit 222 according to this embodiment will be described. Fig. 3 is a schematic block diagram showing an example of the functional configuration of the model processing unit 222 according to this embodiment. The model processing unit 222 includes a change point identification unit 222a, a boundary surface identification unit 222b, and a stratum identification unit 222c. The change point identification unit 222a identifies, as a change point, an excavation point where the amount of change in the excavation direction is greater than a preset threshold value for the amount of change from the distribution of drilling input energy shown in the drilling data. The distribution of drilling input energy is expressed by the drilling input energy for each excavation point in the drilling data, starting from each individual drilling point. In the example of Figure 4, the drilling input energy is obtained for each excavation point sampled at predetermined time intervals on the path advanced by excavation starting from drilling point dh.

[0022] The drilling input energy depends on differences in geology, and even in the same geology, the degree of weathering, the distribution and scale of faults, the distribution of rock masses, the state of cracks, etc. Generally, the harder the stratum, the greater the drilling input energy, and the softer the stratum, the smaller the drilling input energy. Therefore, the change point is estimated as the boundary of the stratum. In the example of Figure 4, from the section where the drilling input energy is steadily changing starting from the drilling point dh, the change point is estimated as the section where the drilling input energy exceeds a predetermined threshold (for example, 150 to 250 (J / cm 3The point tp where the drilling input energy decreases can be identified as the change point. This point tp corresponds to the boundary between stratum A and softer stratum B. Conversely, when progressing from a soft layer (e.g., a crushed zone, etc.) to a hard layer, the point where the drilling input energy increases suddenly corresponds to the change point, which is the boundary between the two. At this change point, the change in the drilling input energy exceeds a predetermined change threshold (e.g., 150 to 250 (J / cm 3 )) will be larger than

[0023] The boundary surface identification unit 222b identifies as the boundary surface bs a surface that passes through change points that share a common change trend in the drilling input energy for each of three or more drilling points. In the example of Figure 5, the boundary surface identification unit 222b can identify as the boundary surface a surface that passes through change points tp01, tp02, and tp03, where the change trend in the drilling input energy for each drilling point in three-dimensional space is common in the excavation direction and the change amount is greater than a predetermined change amount threshold. The change trend in the drilling input energy in the excavation direction includes a distinction between an increase and a decrease in the drilling input energy. The change trend in the drilling input energy in the excavation direction may include an increase or decrease. This increase or decrease corresponds to the aforementioned change amount or its threshold. The change trend in the drilling input energy in the excavation direction may also include a reference value of the steady drilling input energy before and after the change. This reference value reflects the strength of the ground.

[0024] Generally, the number of change points found at each drilling point is not limited to one, but can be two or more. Furthermore, change points are found on the boundary surfaces of adjacent strata. Therefore, the boundary surface identification unit 222b can identify, for each drilling point, a surface that passes through three or more change points that are adjacent in the excavation direction and have a common trend of change in drilling input energy toward the excavation direction as a new boundary surface. The stratum identification unit 222c can then identify, as a layer, the space between the boundary surface identified by the boundary surface identification unit 222b and a newly identified boundary surface that is adjacent in the excavation direction.

[0025] In the example of Figure 6, the boundary surface identification unit 222b identifies as the first boundary surface bs1 a surface passing through all of the change points tp11, tp12, and tp13 where the decrease in drilling input energy is greater than a predetermined threshold value as a change trend in the drilling input energy at each drilling point in the excavation direction.The boundary surface identification unit 222b identifies as the second boundary surface bs2 a surface passing through all of the change points tp22, tp22, and tp23 that appear after the change points tp12, tp12, and tp13 where the increase in drilling input energy is greater than a predetermined threshold value as a change trend in the drilling input energy at each drilling point in the excavation direction.The stratum identification unit 222c then identifies the layer sandwiched between the first boundary surface bs1 and the second boundary surface bs2 as the weak layer portion WL.The drilling input energy at the weak layer portion WL is lower than that of the preceding and succeeding layers, so the stratum is inferred to be weak.

[0026] 6, the boundary surface identification unit 222b may identify a third boundary surface that passes through all of the change points where the increase in the drilling input energy is greater than a predetermined threshold value after the second boundary surface. In this case, the stratum identification unit 222c can identify the layer between the second and third boundary surfaces as a hard layer. The tendency of the drilling input energy to increase or decrease relative to the excavation direction may differ depending on the hardness or softness of the natural ground and the geological conditions. For example, in contrast to the example in Figure 6, the boundary surface identification unit 222b may identify a first boundary surface that passes through all change points where the increase in the drilling input energy is greater than a predetermined threshold, and a second boundary surface that passes through all change points where the decrease in the drilling input energy is greater than a predetermined threshold. In this case, the stratum identification unit 222c can identify the layer sandwiched between the first and second boundary surfaces as a hard layer.

[0027] The display processing unit 224 may construct a display screen that shows the three-dimensional shape of the surface or layer identified by the model processing unit 222, and cause the constructed display screen to be displayed on the display unit . Furthermore, the display processing unit 224 may construct the display screen by further superimposing a three-dimensional shape of part or all of the excavation route. The excavation route is represented by a set of excavation points starting from each individual drilling point.

[0028] Thus, the display processing unit 224 and the display unit 28 visualize the three-dimensional shapes of the layers and excavation route sandwiched between the plane passing through the change point or adjacent planes. The user interacting with the display screen can easily understand the relative positions of these planes or layers and the excavation route. More specifically, the user can intuitively grasp the positions of the boundary surfaces between hard layers and weak layers, and the boundary surfaces between weak layers and other hard layers, as well as the strike, dip, thickness, and orientation (e.g., flow grain, index grain) of the weak layers. Because weak layers are at high risk of collapse, information such as the location and orientation of weak layers is useful for determining whether reinforcement work or the expansion of safety measures is necessary and how to implement them. The display processing unit 224 may represent each layer and excavation route using different display patterns (e.g., color tones, patterns, etc.).

[0029] Next, an example of a series of information processing procedures from natural ground exploration to visualization of the boundary surface will be described. Fig. 7 is a flowchart illustrating the information processing procedures according to this embodiment. (Step S102) The drilling machine of the exploration system 10 excavates the ground at three or more drilling points, obtains drilling data showing the excavation status at each drilling point, and stores the data in the server device. (Step S104) The server device of the exploration system 10 calculates the distribution of drilling input energy based on the excavation conditions indicated in the drilling data, and stores the calculated distribution of drilling input energy in the drilling data.

[0030] (Step S106) The model processing unit 222 of the information processing device 20 receives input of drilling data indicating the distribution of drilling input energy from the server device of the exploration system 10. (Step S108) The model processing unit 222 identifies, as a change point, an excavation point where the amount of change in the drilling input energy in the drilling direction exceeds a predetermined threshold value for each drilling point. (Step S110) The model processing unit 222 identifies a boundary surface passing through a change point where the change trend of the drilling input energy is common among three or more drilling points.

[0031] (Step S112) The model processing unit 222 identifies the layer sandwiched between a first boundary surface passing through the change point where the drilling input energy decreases and a second boundary surface passing through the change point adjacent to the drilling direction where the drilling input energy increases as a weak layer portion. (Step S114) The display processing unit 224 visualizes the three-dimensional shapes of the identified boundaries and weak layer portions. Here, the display processing unit 224 creates a display screen showing the three-dimensional shapes and displays them on the display unit 28. Thereafter, the processing in FIG. 7 ends.

[0032] 7 shows the example in which the model processing unit 222 identifies the weak layer portion in step S112, but this is not limiting. The model processing unit 222 may identify a hard layer instead of or in addition to the weak layer portion. In step S114, the display processing unit 224 may visualize the hard layer instead of the weak layer portion or together with the weak layer portion.

[0033] In the above description, the information processing system S1 is primarily applied to forward exploration related to mountain tunnel construction, but this is not limited to this example. The information processing system S1 may also be applied to construction or planning of other types of work, as well as to the creation or editing of new geological models. These applications can be performed regardless of whether construction is actually being carried out. The model processing unit 222 of the information processing device 20 can construct a geological model representing two or more boundary surfaces or one or more layers by applying drilling data obtained by drilling three or more drilling points in a vertical direction as drilling data. The display processing unit 224 may display the three-dimensional shape of the constructed geological model on the display unit 28, or may convert the constructed geological model into a cross-sectional view representing a cross section parallel to the vertical direction and display the converted cross-sectional view on the display unit 28.

[0034] The model processing unit 222 may edit the existing geological model using a newly constructed geological model based on the drilling data. The model processing unit 222 may, for example, overwrite the existing geological model with the new geological model. Here, if there is no common area between the target area of ​​the existing geological model and the target area of ​​the new geological model, the model processing unit 222 integrates the new geological model into the existing geological model. If there is a common area between the target area of ​​the existing geological model and the target area of ​​the new geological model, the model processing unit 222 may discard the portion of the existing geological model related to the common area and add the new geological model, or may add the portion of the new geological model related to a unique area not common to the existing geological model to the existing geological model.

[0035] As described above, in the information processing device 20 according to this embodiment, the model processing unit 222 refers to the drilling data showing the distribution of drilling input energy for each drilling point, and identifies change points where the amount of change in the drilling input energy in the excavation direction is greater than a predetermined change amount threshold. The model processing unit 222 determines a boundary surface passing through change points where the change trend of the drilling input energy is common among three or more drilling points. The model processing unit 222 may construct a geological model having a boundary surface or layers sandwiched between boundary surfaces adjacent in the excavation direction. This configuration identifies the change points where the amount of change in the drilling input energy in the excavation direction is significant, and determines the boundary surface that passes through the change point where the change trend in the drilling input energy is common between drilling points. Since the determined boundary surface is estimated to be the boundary surface of strata with different mechanical properties, the ground structure can be easily derived based on the hardness and softness of the ground near the drilling point.

[0036] The information processing device 20 may also include a display processing unit 224 that causes the display unit 28 to display the shape of the layer sandwiched between the identified boundary surface or adjacent boundary surfaces in the excavation direction. This configuration allows visualization of the ground structure in the direction of excavation, which is easily derived. The derived ground structure is provided intuitively at the construction site in a timely manner, which contributes to the assessment of possible risks and the formulation of safety improvements.

[0037] The model processing unit 222 may also identify a first boundary surface passing through three or more transition points and a second boundary surface passing through a transition point adjacent to the transition point related to the first boundary surface in the excavation direction, and identify a layer sandwiched between the first boundary surface and the second boundary surface. Here, the following may be identified: (1) a weak layer portion sandwiched between harder layers at each of the first boundary surface and the second boundary surface; (2) a hard layer sandwiched between softer layers at each of the first boundary surface and the second boundary surface; (3) a layer that contacts a softer layer at the first boundary surface and a harder layer at the second boundary surface; and (4) a layer that contacts a harder layer at the first boundary surface and a softer layer at the second boundary surface. The information processing device 20 may include a display processing unit 224 that causes the display unit 28 to display information indicating the shape of the identified layer. This configuration provides intuitive and timely information on the presence, size, orientation, and other aspects of weak or hard layers that affect the safety of the construction site, which contributes to the adjustment of construction plans or design changes according to the hardness or softness of the ground and the structure of the ground, thereby improving construction productivity.

[0038] The information processing device 20 may include a setting unit 226 that sets a threshold value for the amount of change in drilling input energy in response to an operation. This configuration allows users, such as geological engineers, to set the threshold value for the change in drilling input energy used to determine the change point. Furthermore, users who are present at the construction site can set the threshold value for the change in drilling input energy depending on the situation at the construction site. Therefore, even when a geological engineer is not present, adjustments to construction plans or design changes can be made smoothly. This reduces labor and improves productivity.

[0039] Although the embodiments of the present application have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs within the scope of the gist of the present invention. For example, the information processing device 20 according to this embodiment may be configured to include dedicated hardware or a computer system. The computer system may include hardware such as a processor and a storage medium, and software including various programs. The processor may read a predetermined program stored in advance in a storage medium and execute the read program to realize the functions of each unit in cooperation with the storage medium and other hardware. In other words, the term "unit" used herein refers to a unit that processes at least one function or operation. Here, "executing a program" refers to executing a process instructed by instructions written in a program. The processor may include, for example, a central processing unit (CPU). The processor may also include a different type of arithmetic circuit than a CPU, such as an application-specific integrated circuit (ASIC) or a field programmable gate array (FPGA). Furthermore, the information processing device 20 according to this embodiment has the functions of the server device in the exploration system 10 described above, and the dedicated server device in the exploration system 10 may be omitted. [Explanation of symbols]

[0040] S1...information processing system, 10...exploration system, 20...information processing device, 22...control unit, 24...communication unit, 26...input unit, 28...display unit, 222...model processing unit, 222a...change point identification unit, 222b...boundary surface identification unit, 222c...geological layer identification unit, 224...display processing unit, 226...setting unit

Claims

1. Refer to drilling data showing the distribution of drilling input energy for each drilling point, and identify a change point where the change amount of the drilling input energy in the excavation direction is greater than a predetermined change amount threshold value; A model processing unit that determines a boundary surface passing through a change point where the change trend of the drilling input energy is common between three or more drilling points. An information processing device comprising:

2. a display processing unit that displays on a display unit the shape of the layer sandwiched between the boundary surfaces or adjacent boundary surfaces in the excavation direction; The information processing device according to claim 1 .

3. The model processing unit a first boundary surface passing through the change point; Identifying a second boundary surface passing through the change point related to the first boundary surface and the change point adjacent to the excavation direction; Identifying a layer sandwiched between the first boundary surface and the second boundary surface The information processing device according to claim 2 .

4. a display processing unit that displays, on a display unit, display information indicating the shape of the layer identified by the model processing unit; The information processing device according to claim 3 .

5. A setting unit is provided to set the threshold value of the amount of change in response to an operation. The information processing device according to claim 1 .

6. The model processing unit A geological model is constructed having layers sandwiched between the boundary surfaces or adjacent boundary surfaces in the excavation direction. The information processing device according to claim 1 .

7. The information processing device A step of referring to drilling data showing the distribution of drilling input energy for each drilling point, and identifying a change point where the change amount of the drilling input energy in the excavation direction is greater than a predetermined change amount threshold value; A step of determining a boundary surface passing through a change point where the change trend of the drilling input energy is common among three or more drilling points. Information processing methods.

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