CN116797755B - Modeling method for multi-time-space three-dimensional geological structure of mixed rock zone - Google Patents

Abstract

The invention belongs to the technical field of geological modeling, and specifically relates to a multi-spatial-temporal three-dimensional geological structure modeling method of a structural melange zone. This method collects and organizes multi-source geological data and performs preprocessing to extract key data for modeling, including fault network modeling, stratigraphic construction, boundary line extraction of geological bodies such as rock masses, and envelope/interface construction of geological bodies such as rock masses. and Boolean operations, ultimately forming a complex structural melange zone geological model. The system achieves efficient and accurate three-dimensional geological structure modeling through automatic and manual interaction. The method of the present invention provides high-precision geological structure modeling and can accurately simulate the geological characteristics and complexity of the mixed rock zone. This method takes into account the diversity and complexity of the melange belt, and provides comprehensive geological information by comprehensively utilizing multi-source data, which has wide application value in the fields of geological research and resource exploration of structural melange belts.

Description

A multi-spatial-temporal three-dimensional geological structure modeling method for tectonic melange belts

Technical field

The invention belongs to the technical field of geological modeling, and specifically relates to a multi-spatial-temporal three-dimensional geological structure modeling method of a structural melange zone.

Background technique

"Tectonic melange belt" is a structural geological entity in which the subduction of plates has stacked together the basic-ultrabasic rock blocks of ocean trenches, pelagic sediments, and oceanic islands and seamounts. It has complex rock compositions and different phases. Hierarchical structural superposition deformation, penetrating structural planes such as mylonitic foliation and schistosity are developed, strong strain zones are closely associated with weak deformation domains, and affected by tectonic hydrothermal fluids, rock alteration is intense, especially in ophiolite blocks. Alteration is the most harmful matrix of large deformation in soft rock. Structural melange belts are a hot spot in the development of global plate tectonics theory. They are an experimental base for studying the orogeny process and engineering geological environment. They are also an important tool for understanding the orderly or disordered structures of different geological units and restricting the mechanical properties of different rock masses and adverse geology in major projects. Entry point for personal behavior.

Melange refers to a geological body that is a mixture of rock blocks with different compositions, ages, and sources. It is a special rock body that is deformed by plate tectonics and can be mapped on geological maps. It is also called a mixed accumulation. It usually consists of three parts: matrix, in-situ rock blocks, and exotic rock blocks. The rock fragments vary in size and shape, are in structural contact with each other, and have experienced shearing at different scales. There are the following four hidden geological risks in railway engineering crossings: ① The rock composition is complex, the lithological layers and structural planes change rapidly and greatly in the longitudinal and transverse directions, and the predictability before construction is low; ② A large number of fractures and shears develop zone, leading to rock fragmentation and the risk of water inrush; ③ The tectonic hydrothermal effect is strong, the rock alteration phenomenon is common, the engineering mechanical properties are poor, and basalt, gabbro, peridotite, etc. will produce serpentinization, chloritization, and talcization , siliceous mudstone produces carbonization and graphitization, leading to an increase in the proportion of unfavorable geological bodies such as expanded rock soil and extremely soft rock; ④ It is easy to activate into active fault zones, prone to slippage and misalignment, endangering engineering construction.

Therefore, it is necessary to provide a multi-source geophysics-geology method based on "air-space-earth-well" drilling along the project line, large-scale structural-lithological geological mapping, airborne gravity magnetism, magnetotelluric sounding, remote sensing images, etc. The three-dimensional geological structure modeling method of the typical structural melange belt of the data establishes the ordered or disordered fine spatial structure of different structural melange rocks on the Sichuan-Tibet Railway, and accurately depicts the structural geometry and structure of the complex geological structures and unfavorable geological bodies along the railway project. Relationships and changes in physical and chemical properties within geological bodies, achieving transparency of geological structures in key areas of tectonic melange belts, and serving engineering decision-making and disaster early warning in complex and dangerous environments.

Contents of the invention

In view of this, the present invention provides a multi-spatial-temporal three-dimensional geological structure modeling method for structural mixed rock belts, using data such as geophysical profile inversion and interpretation results, structural-lithological geological maps and other data to establish detailed structures including deep and large faults, active faults, etc. A three-dimensional fault network system model of deep and large faults; for the geological structure with orderly geological relationships, the principles of geological knowledge management and geological modeling are introduced into the modeling process, and the geological elements are transformed into geological modeling constraints to achieve automatic and manual Interactive three-dimensional geological structure modeling; in view of the complexity of the "rock blocks" and "matrix" in the zone, which are complex and rapidly changing in space, research on "orderly" ordered geological structures (such as fine fault networks, fracture zones) Construction technology of disordered and unfavorable geological bodies in mixed rock belts under the constraints of boundaries, etc.

The present invention adopts the following technical solutions to achieve:

A multi-spatial-temporal three-dimensional geological structure modeling method for tectonic mixed rock belts. The method includes the following steps:

Step 1). Collect and organize data: Collect multi-source data from each mixed rock zone and preprocess it according to the data format required for modeling;

Step 2), modeling data extraction: Extract key data required for modeling from the preprocessed multi-source data, where the key data includes different lithology boundary ranges, fault trend and occurrence information, and stratigraphic constraint data. ;

Step 3), three-fault network modeling: Based on the extracted fault direction and occurrence information, construct the fault plane and process the primary, auxiliary and boundary relations of the fault plane;

Step 4), stratum construction: use multi-source data as constraint data, construct the basement according to the boundaries of the work area and faults in the area; extract the constraint data of different strata respectively, and add the constraint data to the model construction in sequence according to the layering order of the strata. List; construct an integrated geological body, and form a bedrock geological body after all strata are formed.

Step 5) Extraction of the boundary line of the mixed rock mass: Extract the boundary contour line of the mixed rock mass contained in the mixed rock belt from the multi-source data, and complete the construction of a single model of the contour line.

Step 6) Construction of the surrounding surface of the mixed rock mass: Refer to the geological section, faults and the direction and occurrence of the strata to determine the shape and occurrence of the intrusion, and extract the contour lines of the intrusion to construct a closed Tin surface.

Step 7), Mixed rock mass sealing: The constructed Tin surface is closed by sealing the surface into a solid body to form the final intrusive body.

Step 8), Boolean operation: Use Boolean operation to obtain the bedrock geological body after deducting the intrusive body, and obtain the intrusive body embedded in the bedrock geological body; and integrate the obtained bedrock geological body and intrusive body model, and finally obtain Geological model of the melange zone.

As a further solution of the present invention, in step 1), when collecting and sorting data, the collected multi-source data of each melange zone includes regional geological maps, geological sections, DEM elevations and satellite image data of each melange zone, where DEM Elevation data and satellite image data are also processed through cropping and splicing, data format conversion, and coordinate conversion to generate the data format required for modeling.

As a further solution of the present invention, preprocessing is performed according to the data format required for modeling, including the following steps:

a) According to the unified naming scheme of designated stratigraphic attributes, the geological section is uniformly divided into strata, and attribute values are assigned to the strata to form a standardized geological section;

b) Conduct geological registration on the collected raster geological maps, vectorize the registered geological maps, and draw them in the form of vector lines on the geological maps according to the modeling elements for modeling use;

c) Extract and import elevation points and contours from DEM elevation data;

d) Determine the modeling range of the mixed rock zone, and perform line densification and shearing operations on the boundaries;

e) Save the processed multi-source data and load and use it according to the process sequence during modeling.

As a further solution of the present invention, extracting and importing elevation points and contours of DEM elevation data includes: importing DEM elevation numbers into modeling software, and using tools to extract elevation points and contours of DEM elevation data in The vector data within the system are extracted and involved in the modeling process to control the ground surface.

As a further solution of the present invention, when determining the modeling range of the mixed rock zone and performing line densification and shearing operations on the boundary, the following steps are included:

Adjust the modeling boundary according to the size of the modeling work area and modeling accuracy, perform line encryption operations on lines with sparse boundary nodes, and perform line filtering operations on lines with dense boundary nodes. After the boundary node density reaches the threshold, Perform line cutting operations on boundary lines.

As a further solution of the present invention, in step 2), modeling data extraction includes the following steps:

Extract the boundary ranges of different lithologies based on registered and vectorized geological maps, and perform encryption operations;

Extract the trend line and occurrence information of the fault according to the geological map, and extract the trend line of the fault according to the geological profile, wherein the combination of the trend line, trend line, and occurrence information is used as supporting data for the construction of the fault plane;

Extract constraint data of different bedrock geological bodies based on geological profiles to control the growth trends of bedrock geological bodies.

As a further solution of the present invention, in step 3), three-fault network modeling includes the following steps:

Control the growth range of faults based on the fault strike line, determine the intersection relationship between faults and boundaries, and determine the primary and auxiliary relationships between faults;

Use the extracted fault dip lines and occurrence information to construct fault planes consistent with geological maps and geological profiles;

Process the main-auxiliary relationship and boundary relationship of the constructed fault plane;

Perform a fault check. If the fault check fails, make corresponding modifications according to the error prompts until the fault data passes the check.

As a further solution of the present invention, in step 4), formation construction includes the following steps:

Using the geological map, geological section, DEM elevation and satellite image data from multi-source data as constrained data, the basement is constructed based on the boundaries of the work area and faults within the area;

Extract the constraint data of different strata respectively, and add the constraint data to the model construction list in sequence according to the formation order of the strata;

Construct an integrated geological body. Confirm the pinch-out range of the model, check whether there are overlapping points in the constraint data and logic errors that are higher than the base surface. After correction, build the Top surface, use the base surface as the Bottom surface, and process the differences between the surfaces. Intersecting relationships, closed entities;

After all the formations are completed, the bedrock geological body is formed.

As a further solution of the present invention, in step 8), the Boolean operation includes the following steps:

Use the A-B operation of the Boolean operation to obtain the bedrock geological body after deducting the intrusive body, and use the A and B operations to obtain the intrusive body embedded in the bedrock geological body;

The obtained bedrock geological body and intrusive body models are integrated to finally obtain the melange zone geological model.

As a further solution of the present invention, when intrusive bodies embedded in bedrock geological bodies are obtained, intersection extraction is performed from each bedrock geological body based on the exposure and cross-fault conditions of some intrusive bodies.

The present invention also includes a computer device, including a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the steps of constructing a multi-spatial-temporal three-dimensional geological structure modeling method for a melange zone are implemented.

The present invention also includes a storage medium storing a computer program, which when executed by a processor implements the steps of a multi-spatial-temporal three-dimensional geological structure modeling method for a mixed rock zone.

Compared with the existing technology, the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts provided by the present invention has the following beneficial effects:

1. Improve modeling accuracy: This method combines various data such as geophysical profile inversion and interpretation results, structural-lithological geological maps, etc., and can more accurately simulate the mixed rock zone through a detailed three-dimensional fault network system model of deep and large faults. geological structure. This helps improve the accuracy of geological modeling, reduce modeling errors, and make geological models more realistic and credible.

2. Realize automatic and manual interaction: This method introduces the principles of geological knowledge management and geological modeling, converts geological elements into geological modeling constraints, and realizes three-dimensional geological structure modeling of automatic and manual interaction. Through manual participation and guidance, professional geological knowledge can be effectively used to guide and correct the modeling process, improving the accuracy and reliability of modeling.

3. Consider complexity and diversity: The rock blocks and matrix within the melange zone have complex diversity and change rapidly in space. This method studies the construction technology of disordered unfavorable geological bodies in melange belts under the constraints of ordered geological structures. It can effectively handle the changes in complex lithology within the melange belt and incorporate it into the modeling process, improving the comprehensiveness of the geological model. expression ability.

4. Comprehensive utilization of multi-source data: This method starts from available multi-source data, including geological maps, geological sections, DEM elevations, satellite images, etc., and comprehensively utilizes these data for modeling. Through data preprocessing, extraction and interpretation, the data is transformed into the form required for modeling, which provides data support and basis for building a real and accurate geological model.

5. Fine fault network and stratigraphic construction: This method focuses on the modeling of faults and strata. Through the construction of fault planes and the construction of network structures of stratigraphic layers, constraints on the scope and shape of stratigraphic layers or geological bodies are achieved. This can better simulate the geological structure of the melange zone and make the relationship between strata and faults more realistic and accurate.

6. Efficient modeling process: This method provides a complete modeling process, including data collection and sorting, data preprocessing, modeling data extraction, three-fault network modeling, stratigraphic construction, rock mass and other geological body boundary lines Extraction, rock mass and other geological body surrounding relationship modeling, etc. This process can efficiently convert a variety of data into the format required for modeling, and achieve comprehensive modeling of geological structures through the organic connection of various steps.

7. Three-dimensional visualization and interactive analysis: This method can display the established multi-temporal three-dimensional geological structure model in a visual way. Through the visualization of the three-dimensional model, users can intuitively observe and analyze the geological structural characteristics of the melange zone, and gain an in-depth understanding of the details of the geological model. At the same time, users can also interact with the model to analyze and modify geological structures to meet different research and application needs.

8. Geological resource evaluation and risk prediction: By establishing a true and accurate geological structure model, this method can provide a reliable basis for geological resource evaluation and risk prediction in mixed rock belts. Geological models can provide support for decisions such as exploration, development and production, help predict geological parameters such as rock type, rock layer thickness, and groundwater distribution, and assess geological risks that may be encountered during the mining process, improving the efficiency and feasibility of resource development.

9. Geological scientific research and education training: This method has important scientific significance for the geological research of melange zones. By establishing a multi-temporal three-dimensional geological structure model, we can reveal the formation and evolution patterns of melange belts and deeply explore geological processes and structural characteristics. In addition, this method can also be applied to geological education and training to provide students and researchers with intuitive and comprehensive geological models to promote understanding and learning of geological subjects.

In summary, the multi-spatial-temporal three-dimensional geological structure modeling method of the structural melange belt provided by the present invention provides high-precision geological structure modeling and can accurately simulate the geological characteristics and complexity of the melange belt. This method implements a modeling process that combines automation and manual interaction, allowing users to flexibly analyze and modify geological models. In addition, this method takes into account the diversity and complexity of melange zones and provides comprehensive geological information by comprehensively utilizing multi-source data. This modeling method is of great significance to geological resource evaluation, risk prediction, scientific research and education and training. It provides a reliable geological basis for decision-making and research. It can improve the accuracy, visualization and interactivity of geological models and provide various application fields. Useful geological information.

Description of the drawings

The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. In the attached picture:

Figure 1 is a modeling flow chart of the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 2 is a modeling sequence diagram of the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 3 is a schematic diagram of a geological section in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 4 is a schematic diagram of geological map registration in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 5 is a schematic diagram of elevation point extraction in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 6 is a schematic diagram of boundary line processing in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 7 is a schematic diagram of range extraction in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 8 is a schematic diagram of fault extraction in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 9 is a schematic diagram of range determination in the multi-temporal and spatial three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 10 is a schematic diagram of the construction of interrupted layers using the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 11 is a schematic diagram of geological body construction in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 12 is a schematic diagram of intrusive body contour extraction in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 13 is a schematic diagram of the construction of the Tin surface of the intrusion in the multi-spatial-temporal three-dimensional geological structure modeling method of the structural melange zone according to the embodiment of the present invention.

Figure 14 is a schematic diagram of the formation of an intrusive body in the multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Figure 15 is a schematic diagram of the melange belt model in the multi-temporal and spatial three-dimensional geological structure modeling method of structural melange belts according to the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

This application provides a multi-spatial-temporal three-dimensional geological structure modeling method for tectonic mixed rock belts, using data such as geophysical profile inversion and interpretation results, structural-lithology geological maps and other data to establish fine deep and large faults including deep and large faults, active faults, etc. Three-dimensional fault network system model; for geological structures with ordered geological relationships, the principles of geological knowledge management and geological modeling are introduced into the modeling process, and geological elements are transformed into geological modeling constraints to achieve automatic and manual interaction of three-dimensional geology Structural modeling; in view of the complexity of the "rock blocks" and "matrix" in the zone, which are complex and rapidly changing in space, research on the constraints of "orderly" ordered geological structures (such as fine fault networks, fracture zone boundaries, etc.) Construction technology of disordered and unfavorable geological bodies in mixed rock belts.

In the multi-spatial-temporal three-dimensional geological structure modeling method of the tectonic melange belt of the present invention, multi-source data and geological knowledge constraints are used, and a combination of complex interactive modeling and single geological body modeling is used to construct the model through faults, bedrock and The construction of rock masses and the application of Boolean operations realize the modeling and model fusion of multi-spatial-temporal three-dimensional geological structures in melange belts.

Referring to Figures 1 and 2, the embodiment of the present invention provides a multi-spatial-temporal three-dimensional geological structure modeling method for structural melange zones, including the following steps:

Step 1). Collect and organize data: Collect multi-source data from each mixed rock zone and preprocess it according to the data format required for modeling;

Step 2), modeling data extraction: Extract key data required for modeling from the preprocessed multi-source data, where the key data includes different lithology boundary ranges, fault trend and occurrence information, and stratigraphic constraint data. ;

Step 3), three-fault network modeling: Based on the extracted fault direction and occurrence information, construct the fault plane and process the primary, auxiliary and boundary relations of the fault plane;

Step 4), stratum construction: use multi-source data as constraint data, construct the basement according to the boundaries of the work area and faults in the area; extract the constraint data of different strata respectively, and add the constraint data to the model construction in sequence according to the layering order of the strata. List; construct an integrated geological body, and form a bedrock geological body after all strata are formed.

Step 5) Extraction of the boundary line of the mixed rock mass: Extract the boundary contour line of the mixed rock mass contained in the mixed rock belt from the multi-source data, and complete the construction of a single model of the contour line.

Step 6) Construction of the surrounding surface of the mixed rock mass: Refer to the geological section, faults and the direction and occurrence of the strata to determine the shape and occurrence of the intrusion, and extract the contour lines of the intrusion to construct a closed Tin surface.

Step 7), Mixed rock mass sealing: The constructed Tin surface is closed by sealing the surface into a solid body to form the final intrusive body.

Step 8), Boolean operation: Use Boolean operation to obtain the bedrock geological body after deducting the intrusive body, and obtain the intrusive body embedded in the bedrock geological body; and integrate the obtained bedrock geological body and intrusive body model, and finally obtain Geological model of the melange zone.

In this embodiment, based on the origin and lithological characteristics of the mixed rock belt, the three-dimensional geological model is planned to be constructed using a combination of complex interactive modeling and single geological body modeling. Faults, bedrock, and rock masses are constructed in sequence according to the geological form. , and finally model fusion is performed through Boolean operations to form a complex structural melange zone geological model.

This invention starts from the available multi-source data, extracts and interprets the relevant original data about a single geological interface, establishes the three-dimensional spatial form of the single geological interface, and performs interactive editing; and then calculates each established geological interface. Intersect and remove the excess parts of the geological interface; finally, the various geological interfaces are combined to form a three-dimensional geological body. Single geological body modeling refers to using the contour information of single bodies such as magmatic rocks, lenses, and inverted folds as the data basis, and using the contour line three-dimensional geological surface reconstruction algorithm to establish single surfaces, and then realize the construction of single body models. The overall technology roadmap is shown in Figures 1 and 2.

In step 1) of this embodiment, when collecting and sorting data, the multi-source data collected for each melange zone includes regional geological maps, geological sections, DEM elevations and satellite image data for each melange zone. Among them, the DEM elevation data And satellite image data are also generated through cropping and splicing processing, data format conversion and coordinate conversion to generate the data format required for modeling.

That is, we collect geological maps, geological sections, DEM elevations, satellite images and other data in each melange belt area, and organize, store, process and make statistics on the collected data, and organize them according to the data format requirements of the modeling software, such as: Cropping and splicing processing of images and DEM data, data format conversion, coordinate conversion, etc.

In this embodiment, data preprocessing refers to the process of extracting modeling data after importing organized multi-source data into the system. Through data preprocessing, the data form required for modeling can be obtained.

Among them, preprocessing is performed according to the data format required for modeling, including the following steps:

a) According to the unified naming scheme of specified stratigraphic attributes, the geological section is divided into unified strata, and attribute values are assigned to the strata to form a standardized geological section.

As shown in Figure 3, specify a unified naming scheme for stratigraphic attributes and standardize the sections; professional geologists determine attribute information such as stratigraphic lithology and sedimentary facies within the modeling area, uniformly divide the geological sections into strata, and conduct stratigraphic analysis on the strata. Attribute values are assigned to form the final standardized geological profile.

b) Conduct geological registration on the collected raster geological maps, vectorize the registered geological maps, and draw them in the form of vector lines on the geological maps according to the modeling elements for modeling use.

Referring to Figure 4, the geological map is registered and vectorized according to the coordinate range on the geological map; the collected raster geological map is geologically registered in professional software to ensure the accuracy of its position; The registered geological map is vectorized, and key modeling elements such as fault direction, stratigraphic pinchout range and other elements are drawn in the form of vector lines for modeling use.

c) Extract and import elevation points and contours of DEM elevation data. Extracting and importing elevation points and contours of DEM elevation data includes: importing DEM elevation numbers into modeling software, using The tool extracts vector data including elevation points and contours of DEM elevation data, and participates in the modeling process to control the ground surface.

As shown in Figure 5, extract and import elevation points and contours from the DEM elevation data; import the dem data into the modeling software, use tools to extract vector data such as DEM elevation points and contours, and participate in During the modeling process, the ground surface is controlled.

d) Determine the modeling range of the mixed rock zone, and perform line densification and shearing operations on the boundaries.

Among them, when determining the modeling range of the mixed rock zone and performing line densification and shearing operations on the boundary, it includes: adjusting the modeling boundary according to the size of the modeling work area and modeling accuracy, and densifying lines with sparse boundary nodes. Operation: perform line filtering operation on lines with dense boundary line nodes. When the density of boundary line nodes reaches the threshold, perform line cutting operation on the boundary line.

Referring to Figure 6, determine the modeling range of the melange zone, and perform a series of operations such as line densification and shearing on the boundary as required. The modeling boundary needs to be adjusted according to the size of the modeling work area and the modeling accuracy. Lines with sparse border nodes should be encrypted, and lines with dense border nodes should be filtered. The density of border nodes should be appropriate and uniform. After that, perform line cutting and other work on the boundary line to ensure that the boundary line meets the modeling requirements.

e) Save the processed multi-source data and load and use it according to the process sequence during modeling.

Save the processed data and load it according to the process sequence when modeling. The boundary line constrains the modeling range, the DEM controls the surface, the vector data after vectorization of the geological map controls the growth range of the surface leakage strata, and the profile data controls the morphology of the deep strata, participating in the modeling respectively. of different processes.

In the embodiment of the present invention, after data preprocessing, secondary extraction needs to be performed according to the detailed requirements for model construction. When constructing faults, it is necessary to obtain the direction and occurrence of faults; when constructing strata, it is necessary to know the growth range and related constraint data of the strata. The relevant operations are as follows:

1) Since the melange zone model is mainly the construction of bedrock geological bodies, it is necessary to extract the boundary ranges of different lithologies based on the registered and vectorized geological maps and perform encryption operations, see Figure 7.

2) Extract the trend line and occurrence information of the fault based on the geological map, and extract the trend line of the fault based on the geological profile, wherein the combination of the trend line, trend line, and occurrence information is used as supporting data for the construction of the fault plane, See Figure 8;

3) Extract the constraint data of different bedrock geological bodies according to the geological section to control the growth trend of the bedrock geological bodies, as shown in Figure 9.

In the embodiment of the present invention, fault modeling is an important part of the three-dimensional geological model. By constructing faults, the constraint on the range and shape of the stratigraphic layer or geological body is achieved. Therefore, the fault layer must first be constructed before constructing the stratigraphic layer.

As shown in Figure 10, in step 3), three-fault network modeling includes the following steps:

1) Control the growth range of faults based on the fault strike line, determine the intersection relationship between faults and boundaries, and determine the primary and auxiliary relationships between faults;

2) Use the extracted fault tendency lines and occurrence information to construct fault planes that conform to geological maps and geological profiles;

3) Process the constructed fault plane’s primary, auxiliary and boundary relationships so that it meets the fault requirements for geological body construction;

4) Perform fault inspection. After passing the inspection, subsequent modeling operations can be performed. If the fault inspection fails, make corresponding modifications according to the error prompt to ensure that the fault data finally passes the inspection.

In the embodiment of the present invention, stratigraphic layer construction is a process of constructing and optimizing the stratigraphic layer network structure and subsequently forming the geological body model after all the data required for model construction have been prepared.

As shown in Figure 11, in step 4), formation construction includes the following steps:

1) Use the geological map, geological section, DEM elevation and satellite image data from multi-source data as constrained data, and construct the basement based on the boundaries of the work area and faults within the area.

2) Extract the constraint data of different strata respectively, and add the constraint data to the model construction list in sequence according to the layering order of the strata. When constructing an integrated geological body, you first need to confirm the pinch-out range of the model. Secondly, you need to check whether the constraint data has logical errors such as overlapping points or being higher than the base surface. After correction, you can construct the Top surface and use the base surface as the Bottom surface. The intersecting relationship between surfaces forms a closed body. After all the formations are completed, the bedrock geological body is formed.

In this application, when extracting the boundary lines of mixed rock masses, the boundary lines of geological bodies such as rock masses are extracted. As shown in Figure 12, the extraction of geological bodies such as rock masses refers to the extraction of mixed rock mass boundary lines from geological profiles, geological maps and other data. The boundary contours of geological bodies such as rock masses mixed in the rock belt are extracted to realize the construction of a single model of the contours.

In this application, when constructing the envelope surface of the mixed rock mass, the envelope surface/interface of the geological body such as the rock mass is constructed. As shown in Figure 13, the intrusive body is judged with reference to the geological section, faults and the direction and occurrence of the strata. Based on the shape and occurrence of the intrusion, a closed Tin surface is constructed using the extracted intrusive body contours to ensure that the Tin surface fits the geological profile, geological map, and fault occurrence, and ensures that the Tin surface conforms to geological cognition.

In this application, when the mixed rock mass is closed, it is closed for geological bodies such as rock mass. As shown in Figure 14, the constructed Tin surface is closed to form the final intrusion body by closing the surface into a body.

In this embodiment, as shown in Figure 15, in step 8), the Boolean operation includes the following steps:

Since rock mass and other geological bodies are fine and complex parts embedded in the bedrock geological body, use the A-B operation of the Boolean operation to obtain the bedrock geological body after deducting the intrusive body, and use the A and B operations to obtain the bedrock geological body embedded in the bedrock geological body. Intrusive body; integrate the obtained bedrock geological body and intrusive body model to finally obtain the mixed rock belt geological model.

Among them, when obtaining the intrusive bodies embedded in the bedrock geological body, the intersection is extracted from each bedrock geological body based on the exposure and cross-fault conditions of some intrusive bodies.

It should be noted that the arrows in Figures 3 to 15 represent the coordinate orientation in three dimensions. In the multi-temporal three-dimensional geological structure modeling demonstration of the structural melange belt, the default arrow point is north.

The multi-spatial-temporal three-dimensional geological structure modeling method of the structural mixed rock belt of the present invention combines geophysical profile inversion and interpretation results, structural-lithological geological maps and other data. Through a detailed three-dimensional fault network system model of deep and large faults, it can more accurately Accurately model the geological structure of melange zones. This helps improve the accuracy of geological modeling, reduce modeling errors, and make geological models more realistic and credible.

The multi-spatial-temporal three-dimensional geological structure modeling method of structural melange belts of the present invention introduces the principles of geological knowledge management and geological modeling, converts geological elements into geological modeling constraints, and realizes automatic and manual interactive three-dimensional geological structure modeling. . Through manual participation and guidance, professional geological knowledge can be effectively used to guide and correct the modeling process, improving the accuracy and reliability of modeling.

The rock blocks and matrix within the melange zone are complex and diverse and change rapidly in space. This method studies the construction technology of disordered unfavorable geological bodies in melange belts under the constraints of ordered geological structures. It can effectively handle the changes in complex lithology within the melange belt and incorporate it into the modeling process, improving the comprehensiveness of the geological model. expression ability.

This invention starts from available multi-source data, including geological maps, geological sections, DEM elevations, satellite images, etc., and comprehensively utilizes these data for modeling. Through data preprocessing, extraction and interpretation, the data is transformed into the form required for modeling, which provides data support and basis for building a real and accurate geological model.

The multi-spatial-temporal three-dimensional geological structure modeling method of the structural melange belt provided by the present invention provides high-precision geological structure modeling and can accurately simulate the geological characteristics and complexity of the melange belt. This method implements a modeling process that combines automation and manual interaction, allowing users to flexibly analyze and modify geological models. In addition, this method takes into account the diversity and complexity of melange zones and provides comprehensive geological information by comprehensively utilizing multi-source data. This modeling method is of great significance to geological resource evaluation, risk prediction, scientific research and education and training. It provides a reliable geological basis for decision-making and research. It can improve the accuracy, visualization and interactivity of geological models and provide various application fields. Useful geological information.

It should be understood that, although described in a certain order, these steps are not necessarily performed in the above order. Unless explicitly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, some steps of this embodiment may include multiple steps or stages. These steps or stages are not necessarily executed at the same time, but may be executed at different times. The order of execution of these steps or stages does not necessarily change. It must be performed sequentially, but may be performed in turn or alternately with other steps or at least part of steps or stages in other steps.

In one embodiment, an embodiment of the present invention provides a computer device, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the above-mentioned multi-spatial-temporal three-dimensional geology of the structural melange zone. Steps in structural modeling methods.

In one embodiment, a storage medium is provided, with a computer program stored thereon, which when executed by a processor implements the steps in the above-mentioned multi-spatial-temporal three-dimensional geological structure modeling method for structural melange zones.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage. In the media, when executed, the computer program may include the processes of the above method embodiments. Any reference to memory, storage, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory.

Non-volatile memory may include read-only memory, magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory may include random access memory or external cache memory. By way of illustration and not limitation, RAM can be in many forms, such as static random access memory or dynamic random access memory.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A modeling method for constructing a multi-time-space three-dimensional geological structure of a mixed rock zone comprises the following steps:

step 1), collecting finishing data: collecting multi-source data of each mixed rock zone, and preprocessing according to a data format required by modeling;

step 2), modeling data extraction: extracting key data required by modeling from the preprocessed multi-source data, wherein the key data comprises different lithology boundary ranges, fault strike and occurrence information and stratum constraint data;

step 3), three-fault network modeling: constructing a fault plane and processing a main-auxiliary relationship and a boundary relationship of the fault plane according to the extracted fault trend and the occurrence information;

step 4), stratum construction: constructing a basal plane by taking multi-source data as constraint data according to the boundary of a work area and faults in the area; respectively extracting constraint data of different strata, and sequentially adding the constraint data to a model construction list according to the layering sequence of the strata; constructing an integrated geologic body, and forming a bedrock geologic body after formation of all stratum is completed;

step 5), extracting boundary lines of the hybrid rock mass: extracting boundary contour lines of mixed rock bodies mixed in a mixed rock zone from multi-source data, and completing monomer model construction of the contour lines;

step 6), constructing surrounding surfaces of the hybrid rock mass: judging the shape and the shape of an invading body by referring to the geological section, the fault and the trend and the shape of stratum, and constructing a closed Tin surface by the extracted outline of the invading body;

step 7), closing the hybrid rock mass: closing the constructed Tin surface in a closed surface forming mode to form a final invaded body;

step 8), boolean operation: obtaining a bedrock geologic body after deducting an invaded body by using Boolean operation, and obtaining the invaded body inlaid in the bedrock geologic body; and integrating the obtained bedrock geologic body and the invaded body model to finally obtain the mixed rock zone geologic model.

2. The method for modeling a multi-time-space three-dimensional geologic structure of a structural hybrid rock zone according to claim 1, wherein in the step 1), when collecting the collated data, the collected multi-source data of each hybrid rock zone comprises data of geologic map, geologic profile, DEM elevation and satellite image of each hybrid rock zone region, wherein the DEM elevation data and the satellite image data further generate data formats required for modeling through clipping and splicing processing, data format conversion and coordinate conversion.

3. The method for modeling a multi-time-space three-dimensional geologic structure of a structural hybrid rock zone according to claim 2, wherein the preprocessing is performed according to a data format required for modeling, comprising the steps of:

a) According to a unified naming scheme of the appointed stratum attribute, carrying out unified stratum division on the geological profile, and carrying out attribute assignment on the stratum to form a standardized geological profile;

b) Carrying out geological registration on the collected grid geological map, vectorizing the registered geological map, and drawing out the grid geological map in a vector line form on the geological map according to modeling elements for modeling;

c) Carrying out elevation point and contour line extraction and importing on the DEM elevation data;

d) Determining a modeling range of the mixed rock zone, and performing line encryption and cutting operation on the boundary;

e) And storing the processed multi-source data, and loading and using according to the flow sequence during modeling.

4. A method of modeling a multi-time space three-dimensional geologic structure of a structural hybrid rock zone as defined in claim 3, wherein the extracting and importing elevation points and contours of DEM elevation data comprises: the method comprises the steps of importing the elevation number of the DEM into modeling software, extracting vector data including elevation points and contour lines of the elevation data of the DEM by using a tool, and participating in the modeling process to control the ground surface.

5. The method for modeling a multi-time-space three-dimensional geologic structure of a formation of a hybrid rock zone according to claim 4, wherein determining the modeling range of the hybrid rock zone and performing line encryption and shearing operations on the boundary comprises:

and adjusting the modeling boundary according to the size of the modeling work area and the modeling precision, performing line encryption operation on the line with sparse boundary line nodes, performing line filtering operation on the line with dense boundary line nodes, and performing line cutting operation on the boundary line after the boundary line node density reaches a threshold value.

6. The method for modeling a multi-time-space three-dimensional geologic structure of a structural hybrid rock zone according to claim 5, wherein in step 2), modeling data is extracted, comprising the steps of:

extracting boundary ranges of different lithologies according to the registered and vectorized geological map, and performing encryption operation;

extracting trend lines and occurrence information of faults according to a geological map, and extracting trend lines of the faults according to a geological profile, wherein the trend lines, the trend lines and the occurrence information are combined to be used as supporting data for construction of the fault plane;

and extracting constraint data of different bedrock geologic bodies according to the geologic profile, and controlling the growth trend of the bedrock geologic bodies.

7. The method for modeling a multi-time-space three-dimensional geologic structure of a structural hybrid rock zone as defined in claim 6, wherein in step 3), three-fault network modeling is performed, comprising the steps of:

controlling the growth range of the fault by taking the fault trend line as a reference, judging the intersection relation between the fault and the boundary, and judging the main and auxiliary relation between the fault and the boundary;

constructing a fault plane conforming to a geological map and a geological section by using the extracted fault trend line and the occurrence information;

processing the main-auxiliary relationship and the boundary relationship of the constructed fault plane;

and performing fault detection, and if the fault detection does not pass, performing corresponding modification according to the error reporting prompt until fault data pass detection.

8. The method for modeling a multi-time-space three-dimensional geologic structure of a formation of a hybrid rock zone of claim 7, wherein in step 4), the formation construction comprises the steps of:

taking the data of a geological map, a geological section, a DEM elevation and a satellite image in the multi-source data as constraint data, and constructing a basal plane according to the boundary of a work area and the faults in the area;

respectively extracting constraint data of different strata, and sequentially adding the constraint data to a model construction list according to the layering sequence of the strata;

constructing an integrated geologic body, wherein the pinch-out range of a model is confirmed, whether the constraint data have overlapping points and logic errors higher than a basal plane is checked, a Top plane is constructed after correction, the basal plane is taken as a Bottom plane, the intersection relation between the planes is processed, and the integral geologic body is closed;

and after all stratum are formed, forming bedrock geologic bodies.

9. A method of modeling a multi-time space three-dimensional geologic structure for constructing a hybrid rock zone as defined in any of claims 1-8, wherein in step 8), boolean operations are performed comprising the steps of:

b, using the A-B operation of Boolean operation to obtain a bedrock geologic body with the invaded body subtracted, and using the A-B operation to obtain the invaded body inlaid in the bedrock geologic body;

and integrating the obtained bedrock geologic body and the invaded body model to finally obtain the mixed rock zone geologic model.

10. The method for modeling a multi-time-space three-dimensional geological structure of a structural hybrid rock zone according to claim 9, wherein when an invaded body embedded in a bedrock geological body is obtained, the method is independently extracted from each bedrock geological body according to the conditions of exposure and cross fault of partial invaded body.