CN113591321B - Method for generating three-dimensional high-simulation structural model of mine earth-rock mixture - Google Patents
Method for generating three-dimensional high-simulation structural model of mine earth-rock mixture Download PDFInfo
- Publication number
- CN113591321B CN113591321B CN202110907240.XA CN202110907240A CN113591321B CN 113591321 B CN113591321 B CN 113591321B CN 202110907240 A CN202110907240 A CN 202110907240A CN 113591321 B CN113591321 B CN 113591321B
- Authority
- CN
- China
- Prior art keywords
- stone
- dimensional
- block
- mixture
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/04—Constraint-based CAD
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention relates to the technical field of stability research and analysis of soil and stone mixture engineering, and discloses a method for generating a three-dimensional high-simulation structural model of a mine soil and stone mixture, which comprises the following steps of investigation and statistical analysis of structural characteristics of the soil and stone mixture on site; extracting block stone geometric outline information based on a three-dimensional structure light scanning technology; smoothing the digital block stone three-dimensional geometric model; and (5) carrying out digital block stone feature statistics and establishing a model base. According to the method for generating the three-dimensional high-simulation structural model of the mine earth-rock mixture, through preparing numerical samples of the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents, multiple groups of numerical experiments can be conducted, the change rule of the three-dimensional strength characteristic and the three-dimensional seepage characteristic of the mine earth-rock mixture along with different stone contents is obtained, technical support and theoretical support are provided for engineering safety research, and the method is an effective method for generating the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents.
Description
Technical Field
The invention relates to the technical field of stability research and analysis of earth and stone mixture engineering, in particular to a method for generating a three-dimensional high-simulation structural model of a mine earth and stone mixture.
Background
The soil and stone mixed structure is very typical, and the structure makes the structure composition of the engineering complex, grading distribution is quite different, and the unique engineering property different from the traditional rock and soil body is shown, so the research method for the mine soil and stone mixture is different from the conventional soil side slope and the rock side slope.
When a conventional field experiment or a large-scale indoor experiment is adopted for research, huge manpower and material resources are consumed, and the taken sample is possibly not representative, so that the three-dimensional high-simulation structural model of the mine soil-stone mixture is generated by adopting a digital method, the method can be used for researching the properties of strength, seepage and the like of samples with different stone contents, and provides technical guarantee and theoretical support for the safety research of related engineering.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a method for generating a three-dimensional high-simulation structural model of a mine earth-rock mixture, which has the advantages of simple method, low cost, strong practicability and the like, and solves the problems that huge manpower and material resources are consumed and the sampled sample is possibly not representative when the conventional field experiment or large-scale indoor experiment is researched.
(II) technical scheme
In order to achieve the purposes of simple method, low cost and strong practicability, the invention provides the following technical scheme: a generation method of a three-dimensional high-simulation structural model of a mine earth-rock mixture comprises the following steps:
1) On-site soil-stone mixture structural feature investigation statistical analysis: the soil-stone segmentation threshold value can comprehensively determine the threshold value d of soil and stone based on actual engineering statistics data, related documents and specifications thr ；
2) Extracting block stone geometric outline information based on three-dimensional structure light scanning technology: adopting a three-dimensional structure light scanning device to scan the shape of a three-dimensional geometric figure of the block stone, and outputting the scanned block stone outline information into an STL file;
3) Smoothing the digital block stone three-dimensional geometric model: carrying out proper surface smoothing treatment on the three-dimensional digital block stone with extremely high surface relief and strong roughness by adopting a Laplacian smoothing algorithm so as to reduce the roughness, reduce the odd number of points, optimize the subsequent calculation grid number and improve the calculation efficiency;
4) Digital block stone feature statistics and model library establishment: based on the geometric outline information of the block stone after three-dimensional laser scanning and smoothing treatment, counting the granularity, sphericity, roundness and other characteristics of the block stone, and establishing a three-dimensional digital block stone model database;
5) Selecting a digital block stone model to be put: according to the structure characteristic investigation and statistical analysis results of the site earth-stone mixture in the step 1, selecting digital block stones with granularity, sphericity, roundness and the like similar to the investigation and statistical analysis of the characteristic data;
6) Stone throwing and three-dimensional space position adjustment: adopting a constrained nonlinear optimization algorithm to adjust the three-dimensional space position of the block stones put in the three-dimensional space so as to ensure that the three-dimensional digital block stones do not invade and intersect each other;
7) Generating a three-dimensional high-simulation structural model of the mine earth-rock mixture: setting the soil except the digital block stone filling area in the research area to finally form a mine soil-stone mixture three-dimensional high-simulation structural model;
the three-dimensional digital block stone feature statistics and model library establishment are carried out, and the main statistical features comprise granularity, sphericity and roundness;
the particle size is based on the maximum diameter d of the stone particles L Intermediate diameter d l And a shortest diameter d s Calculated equivalent sphere diameter d n To represent;
the sphericity is obtained by using the ratio of the cross section of the sphere with the same volume as the particle to the maximum projection area of the particle, and can be expressed as:
roundness refers to the degree to which the corners of a particle are rounded, and can be calculated by the following equation:
wherein r is the radius of an inscribed circle of the corner; n is the number of corners; r is the maximum inscribed circle radius of the particles;
the stone block throwing and the three-dimensional space position adjustment define a vertex set { A }, of the stone block A 1 ，A 2 ，…，A n Vertex set of block B { B } 1 ，B 2 ，…，B n Let a and B be any point in the block stone a and block stone B, respectively, then there are:
in the method, in the process of the invention,
due to the limiting condition, the a and the B can only move in the feasible areas of the block stone A and the block stone B respectively, so that the problem of the spatial position relation of the polyhedron is converted into the problem of judging the nearest distance between the a point and the B point, and further the problem of constraint nonlinear optimization can be converted:
preferably, the soil-rock partition threshold d in step 1 thr Is determined by combining the field investigation result, the related literature, the specification and the engineering experience, or d can be adopted thr ＝0.05L C To determine, wherein L C Is an engineering feature scale of a research scope.
(III) beneficial effects
Compared with the prior art, the invention provides a method for generating a three-dimensional high-simulation structural model of a mine earth-rock mixture, which has the following beneficial effects:
according to the method for generating the three-dimensional high-simulation structural model of the mine earth-rock mixture, the gap of generating the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents in actual research is filled with the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents, so that numerical samples of the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents can be prepared, a plurality of groups of numerical experiments can be carried out, and the change rule of the three-dimensional strength characteristic and the three-dimensional seepage characteristic of the mine earth-rock mixture with different stone contents can be obtained; and further, research on engineering stability of mine dumping sites, tailing dams and the like by stone content is developed, so that technical guarantee and theoretical support are provided for engineering safety research, and the method is an effective method for generating three-dimensional high-simulation structural models of mine earth-stone mixtures with different stone contents, and is simple in method, low in cost and high in practicability.
Drawings
FIG. 1 is a schematic diagram of the three-dimensional structured light scanning principle of the present invention;
FIG. 2 is a three-dimensional scan of material block stone particles of a certain dumping site according to the invention;
FIG. 3 is a view of the surface smoothing and grid sectioning of a digital block stone according to the present invention;
FIG. 4 is a diagram of a three-dimensional digital block stone model library of a material in a dump according to the present invention;
FIG. 5 is a three-dimensional high-simulation structure model diagram of the soil and stone mixture of the mine dumping site under different stone contents;
fig. 6 is a flow chart of the invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A generation method of a three-dimensional high-simulation structural model of a mine earth-rock mixture comprises the following steps:
1) Firstly, carrying out on-site investigation and investigation on geological features of a mine dumping site, and carrying out statistical analysis on particle composition and particle grading conditions through on-site measurement (coarse particles) +screening (fine particles);
2) Comprehensively determining the threshold value of 'soil' and 'stone' as d based on actual engineering statistics data, related documents and specifications thr =5 mm, i.e. particles with a particle size of less than 5mm are "earth", and particles with a particle size of more than 5mm are "stone";
3) Determining the minimum size of the block stone particles according to the soil-stone segmentation threshold value, and adopting a three-dimensional laser scanning technology to obtain a block stone particle image according to the threshold value d thr The three-dimensional geometric information of the segmented stone blocks is obtained, as shown in fig. 1, which is a three-dimensional laser scanning technology schematic diagram, two cameras have the same internal reference matrix K, and the two cameras are respectively positioned in an independent coordinate system x of the two cameras 1 -y 1 -z 1 And x 2 -y 2 -z 2 Assume that there is a point p (x 0 ，y 0 ，z 0 ) Which is arranged at the camera O 1 The image in (a) is x 10 At the camera O 2 The image in (a) is x 20 Let p be the vertical distance l from the image plane of two cameras 1 And l 2 The conversion relations between the coordinate systems are respectively R 1 ，T 1 ]And [ R ] 2 ，T 2 ]The following steps are:
the above-mentioned materials are converted to obtain
{x′ i ，y′ i ，z′ i The normalized image coordinates are used for outputting the normalized image as an STL file, and fig. 2 is a three-dimensional structure picture of a certain block of stone after scanning;
4) STL files obtained based on three-dimensional laser scanning are subjected to surface smoothing treatment based on a Laplace smoothing algorithm, as shown in fig. 3, the surface smoothing treatment can effectively reduce surface roughness, reduce odd number of points, effectively reduce the number of finite element grids, and improve calculation efficiency;
5) Based on the digital block stone obtained by three-dimensional laser scanning, counting the granularity, sphericity and roundness characteristics of the digital block stone, and establishing a three-dimensional digital block stone model database, as shown in fig. 4;
6) Extracting the block stones with corresponding sizes and shapes from a three-dimensional digital block stone model database as the block stones to be put in based on the statistical characteristics of the field investigation and the actual measurement block stones;
7) Determining the size and stone content of a research area, uniformly putting selected to-be-put block stones into a model area, and adopting a constrained nonlinear optimization algorithm (CNOA algorithm) to adjust the three-dimensional space position of the put block stones in a three-dimensional space so as to ensure that the three-dimensional digital block stones are not mutually invaded and intersected; performing three-dimensional space position adjustment on the block stone put in the three-dimensional space, and defining a vertex set { A } of the block stone A 1 ，A 2 ，…，A n Vertex set of block B { B } 1 ，B 2 ，…，B n Let a and B be any point in the block stone a and block stone B, respectively, then there are:
in the method, in the process of the invention,
due to the limiting condition, the a and the B can only move in the feasible areas of the block stone A and the block stone B respectively, so that the problem of the spatial position relation of the polyhedron is converted into the problem of judging the nearest distance between the a point and the B point, and further the problem of constraint nonlinear optimization can be converted:
8) And filling soil bodies in other areas except the three-dimensional digital block stones in the research area to form a final three-dimensional high-simulation structural model of the mine soil-stone mixture, wherein the three-dimensional high-simulation structural model of the mine soil-stone mixture with different stone contents is generated as shown in fig. 3.
The beneficial effects of the invention are as follows: according to the method for generating the three-dimensional high-simulation structural model of the mine earth-rock mixture, the gap of generating the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents in actual research is filled with the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents, so that numerical samples of the three-dimensional high-simulation structural model of the mine earth-rock mixture with different stone contents can be prepared, a plurality of groups of numerical experiments can be carried out, and the change rule of the three-dimensional strength characteristic and the three-dimensional seepage characteristic of the mine earth-rock mixture with different stone contents can be obtained; and further, research on engineering stability of mine dumping sites, tailing dams and the like by stone content is developed, so that technical guarantee and theoretical support are provided for engineering safety research, and the method is an effective method for generating three-dimensional high-simulation structural models of mine earth-stone mixtures with different stone contents, and is simple in method, low in cost and high in practicability.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The method for generating the three-dimensional high-simulation structural model of the mine earth-rock mixture is characterized by comprising the following steps of:
1) On-site soil-stone mixture structural feature investigation statistical analysis: the soil-stone segmentation threshold value can comprehensively determine the threshold value d of soil and stone based on actual engineering statistics data, related documents and specifications thr ；
2) Extracting block stone geometric outline information based on three-dimensional structure light scanning technology: adopting a three-dimensional structure light scanning device to scan the shape of a three-dimensional geometric figure of the block stone, and outputting the scanned block stone outline information into an STL file;
3) Smoothing the digital block stone three-dimensional geometric model: carrying out proper surface smoothing treatment on the three-dimensional digital block stone with extremely high surface relief and strong roughness by adopting a Laplacian smoothing algorithm so as to reduce the roughness, reduce the odd number of points, optimize the subsequent calculation grid number and improve the calculation efficiency;
4) Digital block stone feature statistics and model library establishment: based on the geometric outline information of the block stone after three-dimensional laser scanning and smoothing treatment, counting the granularity, sphericity, roundness and other characteristics of the block stone, and establishing a three-dimensional digital block stone model database;
5) Selecting a digital block stone model to be put in; according to the structure characteristic investigation and statistical analysis results of the site earth-stone mixture in the step 1, selecting digital block stones with granularity, sphericity, roundness and the like similar to the investigation and statistical analysis of the characteristic data;
6) Stone throwing and three-dimensional space position adjustment: adopting a constrained nonlinear optimization algorithm to adjust the three-dimensional space position of the block stones put in the three-dimensional space so as to ensure that the three-dimensional digital block stones do not invade and intersect each other;
7) Generating a three-dimensional high-simulation structural model of the mine earth-rock mixture: setting the soil except the digital block stone filling area in the research area to finally form a mine soil-stone mixture three-dimensional high-simulation structural model;
the three-dimensional digital block stone feature statistics and model library establishment are carried out, and the main statistical features comprise granularity, sphericity and roundness;
the particle size is based on the maximum diameter d of the stone particles L Intermediate diameter d l And a shortest diameter d s Calculated equivalent sphere diameter d n To represent;
the sphericity is obtained by using the ratio of the cross section of the sphere with the same volume as the particle to the maximum projection area of the particle, and can be expressed as:
roundness refers to the degree to which the corners of a particle are rounded, and can be calculated by the following equation:
wherein r is the radius of an inscribed circle of the corner; n is the number of corners; r is the maximum inscribed circle radius of the particles;
the stone block throwing and the three-dimensional space position adjustment define a vertex set { A }, of the stone block A 1 ，A 2 ，…，A n Vertex set of block B { B } 1 ，B 2 ，…，B n Let a and B be any point in the block stone a and block stone B, respectively, then there are:
in the method, in the process of the invention,
due to the limiting condition, the a and the B can only move in the feasible areas of the block stone A and the block stone B respectively, so that the problem of the spatial position relation of the polyhedron is converted into the problem of judging the nearest distance between the a point and the B point, and further the problem of constraint nonlinear optimization can be converted:
2. the method for generating the three-dimensional high-simulation structural model of the mine earth-rock mixture according to claim 1, which is characterized by comprising the following steps of: step 1, the soil-stone segmentation threshold d thr Is determined by combining the field investigation result, the related literature, the specification and the engineering experience, or d can be adopted thr ＝0.05L C To determine, wherein L C Is an engineering feature scale of a research scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110907240.XA CN113591321B (en) | 2021-08-09 | 2021-08-09 | Method for generating three-dimensional high-simulation structural model of mine earth-rock mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110907240.XA CN113591321B (en) | 2021-08-09 | 2021-08-09 | Method for generating three-dimensional high-simulation structural model of mine earth-rock mixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113591321A CN113591321A (en) | 2021-11-02 |
| CN113591321B true CN113591321B (en) | 2023-10-03 |
Family
ID=78256294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110907240.XA Active CN113591321B (en) | 2021-08-09 | 2021-08-09 | Method for generating three-dimensional high-simulation structural model of mine earth-rock mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113591321B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130650A (en) * | 2015-09-01 | 2015-12-09 | 河北农业大学 | Solid mine waste planting mixed soil and preparation method thereof |
| KR20170011768A (en) * | 2015-07-24 | 2017-02-02 | 부경대학교 산학협력단 | Simulation method for optimization of truck-loader haulage system in open-pit and underground mine |
| CN106960070A (en) * | 2016-12-28 | 2017-07-18 | 山东科技大学 | A kind of seepage simulation method that coal body is reconstructed based on finite element discretization member CT |
| KR101813903B1 (en) * | 2016-07-22 | 2018-01-02 | 연세대학교 산학협력단 | Design system and method for debris barrier using coupled eulerian-lagrangian analysis |
| CN111783304A (en) * | 2020-07-02 | 2020-10-16 | 中国恩菲工程技术有限公司 | Simulation analysis method and device for mine, equipment and storage medium |
| WO2021047328A1 (en) * | 2019-09-10 | 2021-03-18 | 青岛理工大学 | Method for determining maximum strain for wellbore instability breakage |
| CN112711904A (en) * | 2020-12-17 | 2021-04-27 | 玉溪矿业有限公司 | Blasting vibration characteristic parameter prediction method based on SA-GA-BP |
| CN113066185A (en) * | 2021-06-03 | 2021-07-02 | 北京慧拓无限科技有限公司 | Scene data creating method, device, medium and equipment of mine simulation system |
-
2021
- 2021-08-09 CN CN202110907240.XA patent/CN113591321B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170011768A (en) * | 2015-07-24 | 2017-02-02 | 부경대학교 산학협력단 | Simulation method for optimization of truck-loader haulage system in open-pit and underground mine |
| CN105130650A (en) * | 2015-09-01 | 2015-12-09 | 河北农业大学 | Solid mine waste planting mixed soil and preparation method thereof |
| KR101813903B1 (en) * | 2016-07-22 | 2018-01-02 | 연세대학교 산학협력단 | Design system and method for debris barrier using coupled eulerian-lagrangian analysis |
| CN106960070A (en) * | 2016-12-28 | 2017-07-18 | 山东科技大学 | A kind of seepage simulation method that coal body is reconstructed based on finite element discretization member CT |
| WO2021047328A1 (en) * | 2019-09-10 | 2021-03-18 | 青岛理工大学 | Method for determining maximum strain for wellbore instability breakage |
| CN111783304A (en) * | 2020-07-02 | 2020-10-16 | 中国恩菲工程技术有限公司 | Simulation analysis method and device for mine, equipment and storage medium |
| CN112711904A (en) * | 2020-12-17 | 2021-04-27 | 玉溪矿业有限公司 | Blasting vibration characteristic parameter prediction method based on SA-GA-BP |
| CN113066185A (en) * | 2021-06-03 | 2021-07-02 | 北京慧拓无限科技有限公司 | Scene data creating method, device, medium and equipment of mine simulation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113591321A (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Quantitative analysis of microscopic structure and gas seepage characteristics of low-rank coal based on CT three-dimensional reconstruction of CT images and fractal theory | |
| Li et al. | Characterization of the mechanisms underlying loess collapsibility for land-creation project in Shaanxi Province, China—a study from a micro perspective | |
| CN110409369B (en) | Slope excavation digital construction and quality control method | |
| Shan et al. | Mesoscopic structure PFC∼ 2D model of soil rock mixture based on digital image | |
| CN105139444B (en) | Three dimensional particles structural remodeling method based on rock core Particles in Two Dimensions image | |
| Jia et al. | A packing algorithm for particles of arbitrary shapes | |
| Xu et al. | Study on the mesostructure and mesomechanical characteristics of the soil–rock mixture using digital image processing based finite element method | |
| CN108280290B (en) | Concrete aggregate numerical model reconstruction method | |
| Yio et al. | Representative elementary volume (REV) of cementitious materials from three-dimensional pore structure analysis | |
| Ju et al. | Numerical analysis of the failure process of soil–rock mixtures through computed tomography and PFC3D models | |
| Zheng et al. | An image based clump library for DEM simulations | |
| CN111272631B (en) | Improved sandstone reservoir pore structure quantitative characterization method | |
| CN109241646B (en) | Multi-factor two-dimensional soil-rock mixture generation method based on elliptical stacking and random field | |
| Yang et al. | Aggregate representation for mesostructure of stone based materials using a sphere growth model based on realistic aggregate shapes | |
| Lianheng et al. | A new method for constructing finite difference model of soil-rock mixture slope and its stability analysis | |
| Li et al. | Properties of microscopic particle morphology and particle contact of renewable construction waste mixtures | |
| Wang et al. | Three-dimensional reconstruction of realistic stone-based materials with controllable stone inclusion geometries | |
| CN109632429B (en) | Sample preparation method for soil-rock mixture double-shaft compression test | |
| Macher et al. | Semi-automatic segmentation and modelling from point clouds towards historical building information modelling | |
| CN114862715A (en) | TIN (triangulated irregular network) progressive encryption denoising method fusing terrain feature semantic information | |
| CUI et al. | Study on the microscopic characteristics of three-dimensional pores in coral sand | |
| CN113591321B (en) | Method for generating three-dimensional high-simulation structural model of mine earth-rock mixture | |
| Kuo | Quantifying the fabric of granular materials: an image analysis approach | |
| CN111159927A (en) | Numerical modeling method for three-dimensional irregular-shaped particle throwing based on voxel matrix | |
| CN110599477B (en) | Method and system for detecting effective porosity of grass planting concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |