Irregular invasive granite type uranium deposit three-dimensional model construction method

Abstract

The invention belongs to the technical field of uranium mine three-dimensional geologic model construction research, and particularly relates to an irregular invasive granite type uranium mine three-dimensional model construction method, which comprises the following steps of: 1, constructing a topographic and geomorphic surface model of a research area; step 2, constructing a drilling database; 3, a modeling element level is extracted; step 4, constructing a modeling area cubic block; and 5, cutting an intersection surface, and establishing a solid model of the research area. According to the method, the three-dimensional space distribution and the mutual relation of the irregular invasive granite type uranium ore can be expressed; the recovery and visual expression of the spatial form of the research object are realized; realizing recovery of spatial positions and interaction relations of various three-dimensional modeling geologic bodies; the surface model and block model forms of the traditional irregular invasive granite type uranium deposit are broken through, the modeling difficulty of the irregular invasive granite type uranium deposit is solved, and geological research and prospecting prediction can be effectively carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of uranium mine three-dimensional geological model construction research, and in particular relates to a method for constructing a three-dimensional model of an irregular intrusive granite-type uranium mine. Background Art

[0002] With the continuous development of the global economy and the increasing utilization of uranium mineral resources in various countries, resource shortages and environmental pollution have become important issues in the world today. The search for hidden mines and deep mines has become a development trend and inevitability of three-dimensional geological modeling. Deep mineral exploration is a knowledge-intensive and highly technology-dependent innovative work. Data integration technology with three-dimensional geological modeling technology as the core has gradually become an important technical means for deep mineral exploration. Through the integrated analysis of comprehensive geological, physical and chemical data and three-dimensional visualization technology, a three-dimensional geological structure model is constructed, the spatial distribution of major mineralization and ore-controlling geological bodies is systematically analyzed, and the understanding of deep ore-controlling factors is deepened, which will improve the success rate of deep mineral exploration.

[0003] Based on various information of the study area combined with geological exploration data, guided by uranium prospecting theory, relying on 3D visualization technology, integrating multiple information such as geology, geophysics, geochemistry, and remote sensing, 3D geological modeling and inference are carried out to establish a comprehensive 3D geological model that can truly reflect the deep, express the 3D spatial distribution and mutual relationship of various geological bodies, so as to carry out geological research and prospecting prediction more effectively.

[0004] In view of the fact that the strata in the study area are non-layered, the granite intruded into the surrounding rock in the later period, and the granite is irregularly intrusive, the traditional automatic and semi-automatic process modeling of stratum-structure modeling cannot realize the model construction of elements such as layers, rock masses and structural surfaces. It is necessary to adopt a modeling method from the whole to the part, and realize the model establishment of various objects in the study area by modeling the closed or intersecting strata and structural surfaces in the study area. Summary of the invention

[0005] The purpose of the present invention is to provide a method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit, which can express the three-dimensional spatial distribution and mutual relationship of the irregular intrusive granite-type uranium deposit; realize the recovery and visual expression of the spatial form of the research object; realize the recovery of the spatial position and interaction relationship of various three-dimensional modeling geological bodies; break through the surface model and block model form of the traditional irregular intrusive granite-type uranium deposit, solve the modeling difficulties of the irregular intrusive granite-type uranium deposit, and can effectively carry out geological research and prospecting prediction.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A method for constructing a three-dimensional model of an irregular intrusive granite-type uranium ore, the method comprising:

[0008] Step 1: construct a topographic model of the study area;

[0009] Step 2, building a drilling database;

[0010] Step 3, extract the modeling element level;

[0011] Step 4, constructing a cubic block in the modeling area;

[0012] Step 5: Cut the intersecting surfaces and build a solid model of the study area.

[0013] The step 1 is specifically as follows: using modeling software to fit the contour line scatter file into terrain boundary lines, and constructing a surface with similar triangular meshes through boundary lines and discrete points; using the mapping function of the modeling software to achieve the fitting of irregular triangulated networks with comprehensive geological maps, and complete the construction of the topographic and geomorphological surface model of the study area.

[0014] The step 2 specifically includes: collecting and organizing the modeling data of the study area, digitizing the data, spatially converting the data, extracting the drilling data information, and establishing the drilling database structure; after the drilling database is constructed, uploading the data to the database to form the drilling database storage information.

[0015] The modeling data of the study area collected and sorted in step 2 include drilling data, profiles, and geological maps; the extracted drilling data information includes drilling data positioning, inclination measurement, and lithology information.

[0016] The step 3 is specifically as follows: for non-layered irregular intrusive granite-type uranium deposits, based on the geological knowledge of the working area, using the constructed topographic surface model and the borehole database as the three-dimensional environment, the study area is interpreted section by section and modeling layer extraction is performed; the interpretation lines are constructed into various layers using three-dimensional modeling software, and the layers are encrypted and smoothed.

[0017] In step 3, the various layers constructed by the interpretation lines include stratigraphic surfaces, rock mass surfaces, and structural surfaces.

[0018] When interpreting each section of the study area in step 3, if the spacing between the interpretation lines is too large and the morphology of some lines varies greatly, auxiliary lines need to be added to enrich the morphology and make the transition more natural.

[0019] The step 4 specifically includes: editing the contact relationship between the layers and the layers in the non-layer irregular intrusive granite-type uranium deposit modeling area in step 3 to ensure that the layers are completely intersected but not overlapped; and using a three-dimensional modeling software module to establish a cubic block of the study area.

[0020] The step 5 is specifically as follows: using the layer extracted in step 3 to crop the cubic block constructed in step 4, adding the stratigraphic surface, rock surface, and structural surface that completely intersect with it to the cubic block for "cropping" respectively, and the cropping order can be from top to bottom or from bottom to top. When one of the layers is cropped, save the layer; then use the next layer to crop the remaining cubic blocks, thereby separating the cubic blocks into small area blocks at each layer, and each small area block constructs a solid model in the study area.

[0021] The beneficial technical effects of the present invention are:

[0022] 1. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit provided by the present invention can intuitively express the three-dimensional spatial distribution and mutual relationship of the irregular intrusive granite-type uranium deposit, and realize the restoration and visualization expression of the spatial form.

[0023] 2. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit provided by the present invention breaks through the two-dimensional abstract surface model and block model of the irregular intrusive granite-type uranium deposit, solves the difficulty in modeling the irregular intrusive granite-type uranium deposit, and has important reference value and reference significance for accurately constructing a three-dimensional geological model of an irregular intrusive granite-type uranium deposit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a method for constructing a three-dimensional model of an irregular intrusive granite-type uranium ore provided by the present invention;

[0025] Figure 2 A schematic diagram of information storage in a drilling database according to an embodiment of the present invention;

[0026] Figure 3 This is a model diagram of the irregular intrusive granite block in the study area in the embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of cutting when the range of a layer is larger than the range of a cubic block in an embodiment of the present invention (blue represents the layer);

[0028] Figure 5 This is a schematic diagram of a single layer after cutting out the study area in an embodiment of the present invention;

[0029] Figure 6 This is a three-dimensional model diagram of an irregular intrusive granite-type uranium deposit in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0031] like Figure 1As shown, the present invention provides a method for constructing a three-dimensional model of an irregular intrusive granite-type uranium ore, which specifically includes the following steps:

[0032] Step 1: Construct a topographic model of the study area

[0033] The SKUA-GOCAD 3D modeling software was used to fit the contour line scatter file into the terrain boundary line, and the surface was constructed with similar triangular meshes through the boundary line and discrete points. The irregular triangulated network (TIN) and the comprehensive geological map were fitted through the mapping function of the modeling software. The construction of the topographic and geomorphic surface model of the study area was completed.

[0034] Step 2: Build a drilling database

[0035] Collect and organize the borehole data, profiles, geological maps, etc. required for modeling the study area, digitize the data, perform spatial conversion, and extract the borehole data positioning, inclination, and lithology information. Establish a borehole database structure; after the borehole database is built, upload the data to the database to form a borehole database storage information, such as Figure 2 As shown in the figure, it lays the foundation for the data extraction required for the later construction of the three-dimensional geological model of irregular intrusive granite-type uranium deposits.

[0036] Step 3: Extract modeling element level

[0037] Import the positioning, inclination, lithology information and other data in the borehole database into the three-dimensional space to provide a basis for the extraction of the modeling layer. The non-layer irregular intrusive granite-type uranium ore body in the area has obvious ore control. Based on the geological knowledge of the working area, the topographic surface model constructed in step 1 and the borehole database constructed in step 2 are used as the three-dimensional environment to interpret the study area section by section. If the spacing between the interpretation lines is too large and the morphology between some lines varies greatly, auxiliary lines need to be added to enrich the morphology and make the transition more natural, and then the modeling layer is extracted. Use three-dimensional modeling software to construct the interpretation lines into various layers, including stratigraphic surfaces, rock mass surfaces, structural surfaces, etc., and perform operations such as encryption and smoothing on the layers on the premise of ensuring the authenticity of the data.

[0038] Step 4: Construct the modeling area cube

[0039] Edit the contact relationship between the layers and the layers in the modeling area of ​​the non-layer irregular intrusive granite-type uranium deposit in step 3 to ensure that the layers are completely intersected but not overlapped. Use the 3D modeling software module to build a cubic block in the study area, such as Figure 3 As shown, later on, face-to-face cutting is performed on the basis of the cubic block.

[0040] Step 5: Cut the intersecting surfaces and build a solid model of the study area

[0041] Since the absolute intersection relationship between adjacent layers in the modeling area is defective in terms of workload and method, the range of the layer constructed in step 3 is larger than the range of the cubic block constructed in step 4, such as Figure 4 As shown, the modeling success rate is increased. Use the layer extracted in step 3 to cut the cubic block constructed in step 4, add the stratum surface, rock surface, and structural surface that completely intersect with it to the cubic block for "cutting" respectively. The cutting order can be from top to bottom or from bottom to top. When one of the layers is cut, save the layer, as shown in Figure 5 As shown, the remaining cubes are then cut with the next level to separate the cubes into small area blocks at each level. Each small area block constructs a physical model of each object in the study area, as shown in Figure 6 As shown in Figure 2, the three-dimensional model of the non-layered irregular intrusive granite-type uranium deposit has been completed.

[0042] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit, characterized in that: The method comprises: Step 1: construct a topographic model of the study area; Step 2, building a drilling database; Step 3, extract the modeling element level; Step 4, constructing a cubic block in the modeling area; Step 5: Cut the intersecting surfaces and build a solid model of the study area.

2. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium ore according to claim 1, characterized in that: The step 1 is specifically as follows: using modeling software to fit the contour line scatter file into terrain boundary lines, and constructing a surface with similar triangular meshes through boundary lines and discrete points; using the mapping function of the modeling software to achieve the fitting of irregular triangulated networks with comprehensive geological maps, and complete the construction of the topographic and geomorphological surface model of the study area.

3. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium ore according to claim 1, characterized in that: The step 2 specifically includes: collecting and organizing the modeling data of the study area, digitizing the data, spatially converting the data, extracting the drilling data information, and establishing the drilling database structure; after the drilling database is constructed, uploading the data to the database to form the drilling database storage information.

4. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit according to claim 3, characterized in that: The modeling data of the study area collected and sorted in step 2 include drilling data, profiles, and geological maps; the extracted drilling data information includes drilling data positioning, inclination measurement, and lithology information.

5. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit according to claim 1, characterized in that: The step 3 is specifically as follows: for the non-layered irregular intrusive granite-type uranium deposit, based on the geological knowledge of the working area, using the constructed topographic surface model and the borehole database as the three-dimensional environment, the study area is interpreted section by section and the modeling layer is extracted; The interpretation lines are constructed into various layers using 3D modeling software, and the layers are encrypted and rounded.

6. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit according to claim 5, characterized in that: In step 3, the various layers constructed by the interpretation lines include stratigraphic surfaces, rock mass surfaces, and structural surfaces.

7. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit according to claim 5, characterized in that: When interpreting each section of the study area in step 3, if the spacing between the interpretation lines is too large and the morphology of some lines varies greatly, auxiliary lines need to be added to enrich the morphology and make the transition more natural.

8. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit according to claim 1, characterized in that: The step 4 specifically includes: editing the contact relationship between the layers and the layers in the non-layer irregular intrusive granite-type uranium deposit modeling area in step 3 to ensure that the layers are completely intersected but not overlapped; and using a three-dimensional modeling software module to establish a cubic block of the study area.

9. The method for constructing a three-dimensional model of an irregular intrusive granite-type uranium deposit according to claim 1, characterized in that: The step 5 is specifically as follows: using the layer extracted in step 3 to crop the cubic block constructed in step 4, adding the stratigraphic surface, rock surface, and structural surface that completely intersect with it to the cubic block for "cropping" respectively, and the cropping order can be from top to bottom or from bottom to top. When one of the layers is cropped, save the layer; then use the next layer to crop the remaining cubic blocks, so as to separate the cubic blocks into small area blocks of each layer, and each small area block constructs a solid model in the study area.

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