A method, device and medium for establishing a three-dimensional entity model of an underground mine

Abstract

The application discloses a kind of underground mine three-dimensional entity model establishing method, device and medium.The method includes: S1, AutoCAD software imports two-dimensional drawing, and drawing is divided into different layers according to mining middle section;S2, clean up invalid graphics;S3, conversion line type, clean up layer;S4, process middle section broken line, closed loop;S5, target middle section DXF file is imported into GEOVIA Surpac software, generates str file;S6, adjust point elevation and line segment slope, generate floor str file;S7, adjust floor str file, generate top surface str file;S8, create floor and roof DTM model;S9, close bottom surface and top surface DTM model, form target middle section three-dimensional entity model;S10, combination forms overall three-dimensional entity model.The application makes full use of AutoCAD software to quickly process two-dimensional drawing on the advantages of messy point, redundant line and control layer, combined with GEOVIA Surpac software three-dimensional space modeling technology, improve the efficiency of two-dimensional plane figure to establish complex three-dimensional entity model.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of simulation and modeling of geotechnical engineering and mining engineering, and particularly relates to a method and device for establishing a three-dimensional entity model of an underground mine and a medium. BACKGROUND

[0002] With the rapid development of infrastructure construction in China and the continuous progress of mining engineering technology, underground engineering involving complex geological environment is increasing day by day, and people's requirements for engineering safety are also increasing. The geological conditions of mining engineering and geotechnical engineering are complex, and there are many safety hazards. The opacity of underground information will lead to difficulties in design and construction. Therefore, it is urgent to establish an intuitive three-dimensional entity model of underground structure engineering body to improve the visualization of the underground engineering system.

[0003] In recent years, with the rapid development of computer technology, building information modeling (BIM) has been gradually promoted to underground engineering, and the establishment of a three-dimensional entity model has become an important basis for numerical simulation of underground space structures and an important means to evaluate the safety of underground space structures. Among them, AutoCAD and GEOVIA Surpac software are widely used in the research and development of three-dimensional models. AutoCAD software is an excellent drawing software with perfect two-dimensional graphic drawing function, simple and efficient operation command and powerful data exchange ability, which can conveniently and quickly draw and edit graphics and meet the two-dimensional graphic drawing needs of various geotechnical engineering. However, AutoCAD also has its own defects. The software can only carry out part of simple three-dimensional design, and the effect of drawing complex three-dimensional graphics is not good and the operation is not convenient.

[0004] GEOVIA Surpac software is a powerful integrated software system in the field of mine and geological exploration, which has powerful and excellent model three-dimensional display and editing functions, can convert mine engineering plan into three-dimensional graphics, and realize the visualization of mine engineering construction effect under complex geological conditions. However, the GEOVIA Surpac software has strict requirements on the planar graphics for building three-dimensional models, and only a closed single coil can successfully generate a model. Due to the huge amount of engineering quantity and the large amount of annotation information, the mine plan is often complex. The "FLAC3D complex model identification method based on mixed programming technology" disclosed in the Chinese invention patent CN112528515A can realize efficient and error-free connection between Surpac software and FLAC3D software. After extracting the relevant structure contour of the stope by CAD, it is imported into Surpac to clean up the two-dimensional drawing, and the three-dimensional model is constructed. However, Surpac software has a big problem in two-dimensional graphics processing. When editing graphics, only the command menu bar can be operated, which is slow, and it is difficult to position the points in three-dimensional space. Some spline curves may be missing or deformed during import into GEOVIA Surpac software and are difficult to restore. In addition, when the distance between adjacent points is too close, the model cannot be generated. This situation is difficult to find with the naked eye and cannot be found by software, which consumes a lot of time and effort in the process of drawing processing, greatly reducing the efficiency of modeling. SUMMARY

[0005] To solve at least one of the problems in the prior art, the present application provides a method, device and medium for establishing a three-dimensional entity model of an underground mine. The two-dimensional plan is processed by AutoCAD, and the complex three-dimensional model is established by importing it into GEOVIA Surpac, solving the problems of low efficiency and complex pre-processing of the model in GEOVIA Surpac.

[0006] The present application is implemented by at least one of the following technical solutions.

[0007] A method for establishing a three-dimensional entity model of an underground mine, comprising the following steps:

[0008] S1, importing the two-dimensional plan of the mine into the AutoCAD software, and dividing the two-dimensional plan into different layers according to the middle section of the mining;

[0009] S2, cleaning up the invalid graphics in the two-dimensional plan in the AutoCAD software;

[0010] S3, converting the line type and cleaning up the layers in the AutoCAD software;

[0011] S4, in AutoCAD software, processing the middle section broken line to form a closed loop for each line, and saving the processed target middle section as a DXF file;

[0012] S5, importing the DXF file of the target middle section into GEOVIA Surpac software to generate a str file;

[0013] S6, in GEOVIA Surpac software, adjusting the point elevation and line segment slope to generate a bottom surface str file;

[0014] S7, in GEOVIA Surpac software, adjusting the bottom surface str file to generate a top surface str file;

[0015] S8, in GEOVIA Surpac software, creating a floor and roof DTM model using the bottom surface str file and the top surface str file;

[0016] S9, combining to create a triangular network to close the floor and roof DTM model, forming a target middle section three-dimensional entity model;

[0017] S10, connecting the three-dimensional entity models of each middle section in GEOVIA Surpac software to form a whole three-dimensional entity model.

[0018] Preferably, in step S1, the mine excavation engineering plan is imported into AutoCAD software, a new layer is created and layer name, color and other parameters are set to distinguish between different mining middle sections, and two-dimensional graphics of different mining middle sections are placed in different layers.

[0019] Preferably, in step S2, the layer in which the target middle section is located in the two-dimensional plan is locked, the remaining layers are frozen and hidden, and QSELECT or SELECTSIMILAR commands are used to batch select similar points, line segments and fill patterns and other irrelevant graphics and delete them, and PURGE command is used to delete redundant layers to avoid cluttered graphics interfering with reading and operation.

[0020] Preferably, in step S3, PEDIT command is used to convert spline curves in the graphics into polyline, MATCHPROP command is used to unify the properties of all lines, EXPLODE command is input to decompose the polyline into multiple short line segments, QSELECT command is input to quickly select extremely short line segments that cannot generate a triangular network in GEOVIA Surpac software, and DELETE command is used to delete them. Alternatively, OVERKILL command is used to remove coincident line segments and extremely short line segments with a tolerance of <0.05 units.

[0021] Preferably, in step S4, the AutoCAD software is used to trim the intersecting line segments by the TRIM command, connect the disconnected graphics by the EXTEND command, form a closed coil, and then export a DXF file.

[0022] Preferably, in step S5, the processed target middle section DXF file is imported into the GEOVIA Surpac software and saved as a str file.

[0023] Preferably, in step S6, the str file is opened in the GEOVIA Surpac software, the elevation of the points is adjusted by setting the z value attribute of the points, the connecting lines between adjacent points after the elevation adjustment are changed in slope to obtain a bottom surface line string graphic conforming to the original drawing, and a bottom plate str file is generated.

[0024] Preferably, in step S7, the GEOVIA Surpac software is used to perform layer operation, line segment scaling, and line segment operation commands on the bottom surface line string graphic to quickly generate a top plate three-dimensional line string graphic conforming to the actual shape, and a corresponding str file is generated.

[0025] Preferably, in step S8, the bottom plate str file and the top plate str file are imported into the GEOVIA Surpac software, a DTM model is created by using a DTM tool, and a line cutting DTM model command is executed to trim and form a three-dimensional curved surface model, which is saved as a DTM file.

[0026] Preferably, in step S9, the top plate DTM file and the bottom plate DTM file are imported into the GEOVIA Surpac software to combine them, a triangular mesh command is used to close and connect the top plate and the bottom plate to form a target middle section three-dimensional entity model.

[0027] Preferably, in step S10, the GEOVIA Surpac software is used to import all the three-dimensional entity models of the middle sections and combine them by holding down the Ctrl key, and a DTM file is saved to obtain an overall three-dimensional entity model conforming to the original drawing.

[0028] The application also provides a computer device, which comprises a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the foregoing method.

[0029] The application also provides a computer readable storage medium, which stores a computer program or instructions, wherein the computer program or instructions are executed by a processor to implement the steps of the foregoing method.

[0030] Compared with the prior art, the application has the following beneficial effects:

[0031] (1) provides a complete set of norms, simple, efficient to establish a detailed process of three-dimensional entity model of underground mine.

[0032] (2) the present application will be all in AutoCAD graphics processing work carried out, using AutoCAD to original drawings for pre-processing, using its simple and efficient operation command, accurate, quickly clean up the two-dimensional drawings, compared to the past in GEOVIA Surpac processing drawings, greatly improve the speed of the graphics pre-processing, also greatly avoids the risk of triangular face creation unsuccessful.

[0033] (3) through the method of establishing three-dimensional entity model of underground mine of the present application, the advantages of AutoCAD software and GEOVIA Surpac software can be complementary, which avoids the single, repeated and complex drawing processing work of engineering and technical personnel and scientific research workers in GEOVIA Surpac, saves a lot of time and energy, and strengthens the superiority of GEOVIA Surpac software in establishing three-dimensional model, so that the establishment of complex three-dimensional entity model is more convenient, fast and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A flow chart of the method for establishing three-dimensional entity model of underground mine provided by the embodiment of the present application;

[0035] Figure 2 A two-dimensional CAD plane engineering drawing of the embodiment of the present application;

[0036] Figure 3 A target middle section plane drawing obtained by layering the plane drawing of the embodiment of the present application;

[0037] Figure 4 A two-dimensional plane drawing after executing line type conversion and layer cleaning command processing of the embodiment of the present application;

[0038] Figure 5 A two-dimensional plane drawing for processing extremely short line segments in the target middle section of the embodiment of the present application;

[0039] Figure 6 A two-dimensional plane drawing for processing broken lines in the target middle section of the embodiment of the present application;

[0040] Figure 7 A floor three-dimensional contour drawing generated by adjusting the point elevation and line slope of the embodiment of the present application;

[0041] Figure 8 A roof three-dimensional contour drawing formed by executing layer operation and line string scaling command of the embodiment of the present application;

[0042] Figure 9 A floor DTM model drawing generated by the target middle section of the embodiment of the present application;

[0043] Figure 10 A top plate DTM model diagram generated for the middle section of the target in the embodiment of the present application;

[0044] Figure 11 A three-dimensional entity model diagram generated for the middle section of the target in the embodiment of the present application;

[0045] Figure 12 An overall three-dimensional entity model diagram generated for the combination of the middle sections and the roadway in the embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the objects and advantages of the present application clearer, the embodiments of the present application are further described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0047] The present application provides a three-dimensional entity model establishment method, device and medium for underground mines, which realizes a three-dimensional entity model establishment method from AutoCAD software processing of complex two-dimensional drawings imported into GEOVIA Surpac, including two-dimensional drawing processing, imported model and line string file generation, line string file DTM file generation, DTM combination to form a complete three-dimensional entity model, etc.

[0048] The three-dimensional entity model establishment method for underground mines provided by the present application, as shown in Figure 1 specifically includes the following steps:

[0049] Step 1, importing two-dimensional plane drawings of mines through AutoCAD, and dividing the two-dimensional plane drawings into different layers according to mining middle sections.

[0050] In this step, the mine excavation engineering plane drawing is imported into the AutoCAD software, and different horizontal section graphics are divided into different layers through quick selection and layer editing commands.

[0051] In some embodiments of the present application, Figure 2 As shown in the figure, a two-dimensional CAD excavation engineering plane drawing of a certain mine is extracted into a new layer according to different mining middle sections.

[0052] Step 2, cleaning invalid graphics in the two-dimensional plane drawings in the AutoCAD software.

[0053] In some embodiments of the present application, Figure 3As shown in the figure, a certain middle section plan is separated from the two-dimensional CAD mining engineering plan. The three-dimensional entity model is only needed to project the contour of the empty area, so the unnecessary point, line segment, filling pattern and other irrelevant mark graphics in the main middle section plan are deleted, and only the contour line of the stope related structure is left to avoid the confusion of the part parameters and the position of the graphics of the concerned middle section (target middle section) caused by the clutter of the graphics. Specifically, the unnecessary point, line, filling pattern and other irrelevant mark graphics are batch-selected and deleted according to the color, line type or layer and other characteristics by the QSELECT command.

[0054] Step 3, in the AutoCAD software, the line type is converted and the layer is cleaned up.

[0055] The spline curve is uniformly converted into a polyline by the conversion of the line type. Specifically, the spline curve in the graphics is uniformly converted into a polyline by the PEDIT command, the properties of all lines are uniformly set by the MATCHPROP command, and the polyline is decomposed into multiple short line segments by the EXPLODE command. In some embodiments of the present application, as shown in the figure, Figure 4 In order to successfully generate a three-dimensional entity model conforming to the original two-dimensional plan in the later stage, all lines in the same middle section are set to have a uniform property, and the lines are decomposed into multiple short line segments according to the adjacent positioning points, and the extremely short line segments with a length less than a preset unit (in some embodiments of the present application, the preset unit is 0.05 units) are screened out, as shown in the figure, Figure 5

[0056] The repeated points, overlapping lines and independent short line segments in the drawing are deleted by the cleaning up of the layer.

[0057] Step 4, in the AutoCAD software, the broken lines in the middle section are processed to close the loops, and saved as a DXF file.

[0058] Based on the processing in the previous step, if the lines in the graphics are disconnected, the disconnected line segments are quickly connected by the extension method, and the intersecting lines in the graphics are cut, as shown in the figure, Figure 6 Finally, each line forms a closed loop, and the target middle section drawing after the processing is exported as a DXF file.

[0059] Specifically, the intersecting lines are cut by the TRIM command, and the disconnected graphics are connected by the EXTEND command, and finally a closed loop is formed.

[0060] Step 5, the DXF file of the target middle section is imported into the GEOVIA Surpac software to generate a str file.

[0061] After the two-dimensional plan drawing in the DXF format after the processing is imported into the GEOVIA Surpac software, the empty area projection contour of each middle section is formed.​

[0062] Step 6, in GEOVIA Surpac software, adjust the point elevation and line segment slope to form the floor str file.

[0063] In this step, open the str file in the GEOVIA Surpac software, adjust the elevation of the points by setting the z value attribute of the points, and change the line segment slope between adjacent points after adjusting the elevation to obtain a floor line string pattern that conforms to the original drawing, and generate a floor str file.

[0064] In some embodiments of the present application, as shown in Figure 7 the original two-dimensional drawing, further adjust the slope of the line segment to make the model space profile and position conform to the actual situation. For two-dimensional drawings with less elevation information, the two-dimensional drawing can be directly modified; for two-dimensional drawings with more elevation information, the elevation information marked in AutoCAD is extracted to a new layer and saved as a DXF file, and then the DXF file is imported into GEOVIA Surpac software and saved as a str file, and the marked str file and the goaf projection profile of the section are opened to directly modify the elevation of the points in the same interface.

[0065] Step 7, in GEOVIA Surpac software, adjust the floor str file and save it as a roof str file.

[0066] In this step, the GEOVIA Surpac software quickly generates a three-dimensional line string pattern that conforms to the actual shape of the roof by using layer operation, line segment scaling, and line segment operation commands, and generates a roof str file.

[0067] In some embodiments of the present application, as shown in Figure 8 , because the mining height of the goaf is limited, the overall mining height of each section is a certain value, and there are large local changes, so layer operation and line segment operation commands can be directly executed to raise the overall floor str file, modify the elevation of the points and the slope of the line segment locally, and then perform line segment scaling to finally form a roof str file that conforms to the actual situation.

[0068] Step 8, in GEOVIA Surpac software, use the floor str file and the roof str file to create floor and roof DTM models.

[0069] In this step, the floor str file and the roof str file are imported into GEOVIA Surpac software, respectively, and DTM models are created by using the DTM tool, and the line cutting DTM model command is used to cut the part of the model that exceeds the contour line to form a three-dimensional curved surface model, which is saved as a DTM file.

[0070] In some embodiments of the present application, as shown in Figure 9 , Figure 10 The bottom plate and top plate DTM models are generated by using the adjusted empty area profile bottom plate str file and top plate str file of the target middle section.

[0071] Step 9, forming a three-dimensional entity model of the target middle section.

[0072] In this step, the target middle section top plate DTM file and bottom plate DTM file are simultaneously imported into GEOVIA Surpac software and combined by using the Ctrl key. The top plate and bottom plate two surfaces are connected by creating a triangular net command, and the three-dimensional entity model of the middle section is formed.

[0073] In some embodiments of the present application, as shown in Figure 11 The closed three-dimensional entity model of the middle section is formed by combining the bottom surface DTM model and the top plate DTM model of the target middle section and creating a triangular net between the two middle sections.

[0074] Step 10, connecting the three-dimensional entity models of each middle section to form an overall three-dimensional entity model.

[0075] In this step, all three-dimensional entity models of the middle sections are simultaneously imported and combined in the GEOVIA Surpac software, saved as a DTM file, and a three-dimensional entity model conforming to the original drawing is obtained.

[0076] As shown in Figure 12 All three-dimensional entity models of the middle sections are combined to form a three-dimensional entity model of the entire mine.

[0077] In some embodiments of the present application, a computer device is also provided, which includes a memory, a processor, and a computer program stored on the memory. The processor executes the computer program to implement the steps of the method described in the foregoing embodiments.

[0078] In some embodiments of the present application, a computer readable storage medium has a computer program or instructions stored thereon. When the computer program or instructions are executed by a processor, the steps of the method described in the foregoing embodiments are implemented.

[0079] The foregoing embodiment of the present application proposes a set of normative, simple and efficient graphic processing method and the established process is specially for the method of establishing a complex three-dimensional entity model of an underground mine, the advantages of Auto CAD and GEOVIA Surpac are combined, the respective shortcomings are abandoned, the use of AutoCAD is deepened, the drawing is processed in the early stage by using the powerful two-dimensional drawing function of Auto CAD, the useless, interfering points, line segments and filling patterns for establishing a three-dimensional model are removed, the short line segments are deleted by screening, the intersecting line segments are cut, the disconnected line segments are connected, the closed two-dimensional graphics of the target line segments are obtained, the three-dimensional contour of the graphics is further processed in the later stage by using GEOVIA Surpac, and the three-dimensional entity model conforming to the original drawing is established, so that the powerful two-dimensional graphic drawing function of Auto CAD is fully displayed, the problem of complex two-dimensional graphic processing of GEOVIA Surpac is solved, and the efficiency of GEOVIA Surpac for establishing a complex three-dimensional model is greatly improved.

[0080] The above embodiment is a preferred embodiment of the present application, but the embodiment of the present application is not limited to the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application should be an equivalent replacement mode, and all are included in the protection scope of the present application.

Claims

1. A method for establishing a three-dimensional solid model of an underground mine, characterized in that, Includes the following steps: S1. Import the two-dimensional plan drawing of the mine into AutoCAD software, and divide the two-dimensional plan drawing into different layers according to the mining section; S2. Clean up invalid graphics in 2D drawings using AutoCAD software; S3. In AutoCAD software, change the linetype and clear the layers; S4. In AutoCAD software, process the broken lines in the middle section to form a closed loop for each line, and save the processed target middle section as a DXF file. S5. Import the DXF file of the target segment into GEOVIA Surpac software to generate a str file; S6. In GEOVIA Surpac software, adjust the point elevation and line segment slope to generate the bottom surface str file; S7. In GEOVIA Surpac software, adjust the bottom str file to generate the top str file; S8. In GEOVIA Surpac software, use the bottom surface str file and the top surface str file to create the bottom plate and top plate DTM models; S9. After combining, create a triangular mesh to close the bottom plate and top plate DTM models, forming a three-dimensional solid model of the target middle section; S10. Connect the three-dimensional solid models of each target segment in GEOVIA Surpac software to form an overall three-dimensional solid model. In step S3, the PEDIT command is used to convert the spline curves in the graphic into polylines, and the MATCHPROP command is used to unify the properties of all lines. The EXPLODE command is input to decompose the polylines into multiple short segments. The QSELECT command is input to select the extremely short segments that cannot generate a triangular mesh in GEOVIA Surpac software, and the DELETE command is used to delete them. In step S4, the intersecting line segments are cut using the TRIM command in AutoCAD software, and the disconnected graphics are connected using the EXTEND command to finally form a closed loop. In step S6, open the str file in GEOVIA Surpac software, set the point attributes, adjust the point elevation and line segment slope to obtain a three-dimensional bottom surface line string graphic that conforms to the original drawing, and generate the corresponding str file. In step S7, the CEOVIA Surpac software uses layer operations, line segment scaling, and line segment operation commands to generate a three-dimensional line string graphic that conforms to the actual shape of the top plate, and generates the top plate str file.

2. The method for establishing a three-dimensional solid model of an underground mine according to claim 1, characterized in that, In step S2, use the QSELECT command or SELECTSIMILAR command to select and delete various types of identification graphics in batches, leaving only the outline of the mining area-related structure.

3. The method for establishing a three-dimensional solid model of an underground mine according to claim 1, characterized in that, In step S8, the base plate str file and the top plate str file are imported into the CEOVIA Surpac software respectively. A DTM model is created using the DTM tool. The part of the model that exceeds the outline is trimmed using the line cut DTM model command to form a three-dimensional surface model and saved as a DTM file.

4. A method for establishing a three-dimensional solid model of an underground mine according to any one of claims 1-3, characterized in that, In step S9, the top plate DTM file and the bottom plate DTM file are simultaneously imported into the GEOVIA Surpac software and combined using the Ctrl key. The two faces of the top plate and the bottom plate are connected by the Create Triangular Mesh command to form a three-dimensional solid model of the target middle section.

5. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1-4.

6. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed by a processor, they implement the steps of the method according to any one of claims 1-4.

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