CN-121999152-A - Roadway three-dimensional modeling method and system based on actually measured boundary line and elevation point

CN121999152ACN 121999152 ACN121999152 ACN 121999152ACN-121999152-A

Abstract

The application relates to the technical field of digital modeling of underground engineering of mines and discloses a roadway three-dimensional modeling method based on actual measurement boundary lines and elevation points, which comprises the following steps of S1, data preparation, namely importing an actual measurement CAD graph of an underground roadway through a CAD file analysis function; S2, layering the roadway, S3, determining a three-dimensional surface of the bottom of the roadway, namely selecting a boundary line subset in any line drawing layer in the step S2, and S5, merging roadway models. The method extracts three types of core data of roadway actual measurement boundary lines, elevation points and geological properties from the existing underground roadway actual measurement CAD graph of the mine through multiplexing, does not need to additionally purchase high-price equipment such as laser scanning, drilling measurement and the like, effectively reduces the hardware input cost of small and medium-sized mine digital modeling, simultaneously ensures the compatibility of the data and a GIS platform through uniformly storing the data in a shp format, provides a stable data base for the subsequent modeling process, and adapts to the current situation of the existing data resources of the mine.

Inventors

ZHANG FAYONG
WU HAO
BAO JINKUN
WANG WEI
Lei Boyang
Xi Wanxin

Assignees

武汉智博创享科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251231

Claims (10)

1. The roadway three-dimensional modeling method based on the actually measured boundary line and the elevation point is characterized by comprising the following steps of: S1, data preparation, namely importing an underground roadway actual measurement CAD graph through a CAD file analysis function, extracting a roadway actual measurement boundary line graph layer and an elevation point graph layer in the underground roadway actual measurement CAD graph, synchronously extracting a geological attribute graph layer associated with the underground roadway actual measurement CAD graph, wherein the geological attribute graph layer comprises rock stratum hardness, burial depth and support type attribute information; S2, roadway layering, namely performing dividing line processing on roadway actual measurement boundary lines in the first shp format file based on a spatial overlapping relation of the roadway actual measurement boundary lines, roadway branching logic and geological attribute partitions of the third shp format file to obtain at least two boundary line subsets without spatial overlapping, respectively storing each boundary line subset into different line patterns, and associating corresponding geological attribute information with each line pattern; S3, determining a three-dimensional surface of the bottom of the roadway, namely selecting a boundary line subset in any line drawing layer in the step S2, and generating a corresponding three-dimensional surface of the bottom of the roadway based on the adjusted contour line and the boundary line subset after topology inspection, line building area, elevation point filtering, contour line generation and adjustment; S4, automatically constructing a roadway model, namely performing triangulation processing on the three-dimensional surface at the bottom of the roadway obtained in the step S3 to generate a bottom triangular net, dynamically adjusting top surface parameters based on geological attribute information of a corresponding line drawing layer in the third shp format file, constructing a top triangular net based on the bottom triangular net and the adjusted top surface parameters, and simultaneously extracting outer boundary lines of the bottom triangular net and the top triangular net to construct a side triangular net; And S5, merging the roadway models, namely repeating the steps S3 to S4 for each of the rest line drawing layers in the step S2 to obtain a single-layered roadway three-dimensional model corresponding to each line drawing layer, and performing space splicing after unifying texture display parameters of all the single-layered roadway three-dimensional models to obtain the integral roadway three-dimensional model.
2. The method for three-dimensional modeling of a roadway based on measured boundary lines and elevation points according to claim 1, wherein in the step S1, the format of the measured CAD drawing of the underground roadway is dwg format or dxf format, the CAD file parsing function supports file parsing of AutoCAD2007 and above, each elevation point in the elevation point diagram layer is associated with an elevation value attribute, attribute information of the geological attribute diagram layer is derived from geological labeling layer or attribute block data in the measured CAD drawing of the underground roadway, and boundary line vectors and corresponding geological attributes are automatically associated in the parsing process.
3. The method for three-dimensional modeling of a roadway based on measured boundary lines and elevation points according to claim 1, wherein in the step S2, the dividing of geological attribute partitions includes dividing hardness partitions by taking formation hardness of 30MPa as a threshold, formation hardness of not less than 30MPa as one partition, formation hardness of less than 30MPa as another partition, dividing burial depth partitions by taking burial depth of 500m as a threshold, burial depth of not less than 500m as one partition, burial depth of less than 500m as another partition, dividing branch protection partitions according to support types, wherein the support types include anchor bolts, arch supports and anchor spraying supports, different line map layers at least include black line map layers and green line map layers, each line map layer corresponds to an independent roadway branch or a section of continuous roadway segments without spatial overlapping, and boundary line subsets of each line map layer are respectively associated with unique identification IDs, and the unique identification IDs are mapped with geological attribute information in a third shp format file one by one.
4. The roadway three-dimensional modeling method based on the actually measured boundary line and the elevation point according to claim 1, wherein in the step S4, the rule for dynamically adjusting the top surface parameter based on the geological attribute information is as follows: When the rock stratum hardness associated with the corresponding line diagram layer is more than or equal to 30MPa, the preset tunnel height h 0 is adjusted to be h 0base multiplied by 1.1, the tunnel top arch parameter g is adjusted to be g 0base multiplied by 0.8, wherein h 0base is the initial preset tunnel height, g 0base is the initial arch parameter, the initial value is 0.3, when the burial depth associated with the corresponding line diagram layer is more than or equal to 500m, the preset tunnel height h 0 is adjusted to be h 0base multiplied by 1.2, the tunnel top arch parameter g is adjusted to be g 0base multiplied by 0.7, when the support type associated with the corresponding line diagram layer is arch support, the preset tunnel height h 0 is adjusted to be h 0base multiplied by 1.05, and the arch parameter g is kept unchanged by g 0base .
5. The roadway three-dimensional modeling method based on the actually measured boundary line and the elevation point according to claim 1, wherein in the step S3, the topology inspection comprises the steps of inspecting the closure of the boundary line, inspecting the non-breakpoint state of the boundary line and inspecting the non-self-intersecting condition of the boundary line, the elevation point filtering is a roadway boundary region vector surface generated based on a line building region, target elevation points in a second shp format file and positioned in the roadway boundary region vector surface are screened, the contour line generation adopts a kriging interpolation method or an inverse distance weighted interpolation method, the contour line adjustment comprises the steps of regenerating contour lines after the abnormal elevation points are identified and removed through a standard difference method, and the contour line space position is adjusted through a point on moving line function.
6. The roadway three-dimensional modeling system based on the actually measured boundary line and the elevation point is characterized by comprising a GIS platform and the following functional modules integrated on the GIS platform: The data importing module is used for importing an underground roadway actual measurement CAD graph through a CAD file analysis function, extracting a roadway actual measurement boundary line graph layer, an elevation point graph layer and an associated geological attribute graph layer, wherein the geological attribute graph layer comprises rock stratum hardness, burial depth and support type attribute information; The roadway layering module is used for carrying out dividing line processing on the roadway actual measurement boundary line in the first shp format file based on the spatial overlapping relation of the roadway actual measurement boundary line, roadway branching logic and the geological attribute partition of the third shp format file to obtain at least two boundary line subsets without spatial overlapping, storing each boundary line subset into different line patterns respectively, and enabling each line pattern to be associated with corresponding geological attribute information; The bottom three-dimensional surface construction module is used for selecting a boundary line subset in any line drawing layer, generating and adjusting a contour line through topology inspection, line building area, elevation point filtering and contour line, and generating a corresponding roadway bottom three-dimensional surface based on the adjusted contour line and the boundary line subset; The model automatic construction module is used for carrying out triangulation on the three-dimensional surface at the bottom of the roadway to generate a bottom triangular net, dynamically adjusting top surface parameters based on geological attribute information of a corresponding line drawing layer in the third shp format file, constructing a top triangular net based on the bottom triangular net and the adjusted top surface parameters, extracting outer boundary lines of the bottom triangular net and the top triangular net to construct a side triangular net, and stitching and endowing the bottom triangular net, the top triangular net and the side triangular net with textures to obtain a single-layered roadway three-dimensional model; And the model merging module is used for obtaining single-layered roadway three-dimensional models corresponding to all the layers through the bottom three-dimensional surface construction module and the model automatic construction module for the rest of the line drawing layers, and carrying out space splicing after unifying texture display parameters of all the single-layered roadway three-dimensional models to obtain the integral roadway three-dimensional model.
7. The roadway three-dimensional modeling system based on the actually measured boundary lines and the elevation points, according to claim 6, is characterized in that the data importing module is further used for carrying out vector data cleaning on the imported actually measured CAD graph of the underground roadway, the vector data cleaning comprises the steps of deleting redundant auxiliary drawing elements and repairing broken boundary line vectors, the redundant auxiliary drawing elements comprise marking lines and legend blocks, attribute association relations of geological attribute layers are reserved in the cleaning process, and mapping integrity of the boundary line vectors and formation hardness, burial depth and support type information is guaranteed.
8. The roadway three-dimensional modeling system based on actual measurement boundary lines and elevation points according to claim 6, wherein the model automatic construction module comprises a triangular mesh encryption unit, a top surface parameter adjustment unit, a top surface generation unit, a side surface generation unit and a model stitching unit, wherein the triangular mesh encryption unit is used for setting mesh precision and performing triangulation processing on a three-dimensional surface of the bottom of a roadway, the mesh precision is set to be 0.5m to 2m, the triangulation processing adopts a Delaunay triangulation algorithm, the top surface parameter adjustment unit is used for calling geological attribute information of a corresponding line drawing layer in a third shp format file, top surface parameters h 0 and g are dynamically adjusted according to preset rules, the preset rules are consistent with the adjustment rules, the top surface generation unit is used for calculating vertex movement height through a formula h=h 0 +pow (w, g) based on the adjusted h 0 and g, the vertex movement height is combined to the nearest horizontal distance w of a boundary line of a triangular mesh, the side surface generation unit is used for extracting the outer side surface triangular mesh of the triangular mesh and the top surface triangular mesh, the side surface generation unit is used for constructing a side surface triangular mesh and the side surface triangular mesh, the bottom surface triangular mesh and the side surface triangular mesh is consistent with the model stitching rules, and the top surface triangular mesh is matched with the model stitching rules.
9. The roadway three-dimensional modeling system based on the actually measured boundary line and the elevation point according to claim 6, wherein the bottom three-dimensional surface construction module comprises a topology checking unit, a zone filtering unit, an interpolation unit, an anomaly processing unit and a three-dimensional surface generating unit; The topology checking unit is used for executing closure checking, breakpoint-free checking and self-intersecting-free checking on the boundary line subset, and executing line construction area processing on the boundary line subset passing the checking to generate a roadway boundary area vector surface; The zone filtering unit is used for screening target elevation points positioned in the zone in the second shp format file based on the roadway boundary zone vector surface; The interpolation unit is used for carrying out interpolation processing on the target elevation point by adopting a Kriging interpolation method or an inverse distance weighted interpolation method so as to generate a contour line; The three-dimensional surface generating unit is used for generating a roadway bottom three-dimensional surface based on the adjusted contour lines and the corresponding boundary line subsets.
10. The roadway three-dimensional modeling system based on measured boundary lines and elevation points of claim 9, wherein the anomaly processing unit is configured to identify and remove an anomaly elevation point by a standard deviation method and trigger the interpolation unit to regenerate the contour line, and/or the anomaly processing unit supports adjustment of a spatial position of the contour line by a point-on-line function.

Description

Roadway three-dimensional modeling method and system based on actually measured boundary line and elevation point Technical Field The invention relates to the technical field of digital modeling of underground mine engineering, in particular to a roadway three-dimensional modeling method and system based on actual measurement boundary lines and elevation points. Background In the field of underground mine engineering, roadway three-dimensional modeling is one of core technologies for realizing mine digital management and intelligent operation, and the core is that roadway space forms and surrounding geological environments are restored through digital means, so that accurate space data support is provided for the work of roadway construction scheme design, ventilation system optimization, safety risk monitoring and the like, and the method is a key foundation for mine transformation from a traditional operation mode to intelligent operation. In the prior art, three-dimensional modeling of a roadway is based on two types of technical paths, namely, point cloud data are acquired based on laser scanning equipment, a roadway model is built through point cloud denoising, registering and modeling software, and the other type of three-dimensional modeling is based on design drawings or manually measured section parameters, parameters such as arch height, wall height and roadway width are manually input into modeling software, a three-dimensional model is generated through operations such as stretching and lofting, and key links are completed through the two types of paths by matching professional equipment or relying on manual experience. The existing roadway three-dimensional modeling technology generally has the problem that a data source depends on high-cost equipment or a large amount of manual parameters are required to be input in a modeling process, and for small and medium-sized mines only with underground roadway actual measurement CAD graphs, lacking high-cost equipment and professional modeling technicians, the existing technology is difficult to meet the modeling requirements of low cost and low technical threshold, so that roadway digital modeling work of the mines is difficult to advance, and follow-up engineering management work cannot be effectively carried out by means of a three-dimensional model. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a roadway three-dimensional modeling method and a roadway three-dimensional modeling system based on actually measured boundary lines and elevation points, which solve the problem that roadway modeling depends on high-cost data or manual parameters. The roadway three-dimensional modeling method based on the actually measured boundary line and the elevation point comprises the following steps: S1, data preparation, namely importing an underground roadway actual measurement CAD graph through a CAD file analysis function, extracting a roadway actual measurement boundary line graph layer and an elevation point graph layer in the underground roadway actual measurement CAD graph, synchronously extracting a geological attribute graph layer associated with the underground roadway actual measurement CAD graph, wherein the geological attribute graph layer comprises rock stratum hardness, burial depth and support type attribute information; S2, roadway layering, namely performing dividing line processing on roadway actual measurement boundary lines in the first shp format file based on a spatial overlapping relation of the roadway actual measurement boundary lines, roadway branching logic and geological attribute partitions of the third shp format file to obtain at least two boundary line subsets without spatial overlapping, respectively storing each boundary line subset into different line patterns, and associating corresponding geological attribute information with each line pattern; S3, determining a three-dimensional surface of the bottom of the roadway, namely selecting a boundary line subset in any line drawing layer in the step S2, and generating a corresponding three-dimensional surface of the bottom of the roadway based on the adjusted contour line and the boundary line subset after topology inspection, line building area, elevation point filtering, contour line generation and adjustment; S4, automatically constructing a roadway model, namely performing triangulation processing on the three-dimensional surface at the bottom of the roadway obtained in the step S3 to generate a bottom triangular net, dynamically adjusting top surface parameters based on geological attribute information of a corresponding line drawing layer in the third shp format file, constructing a top triangular net based on the bottom triangular net and the adjusted top surface parameters, and simultaneously extracting outer boundary lines of the bottom triangular net and the top triangular net to construct a side triangular net; And S5, merging the r