CN106097448A - A kind of salt chamber wall rock geology three-dimensional modeling method under multiple features constraint - Google Patents
A kind of salt chamber wall rock geology three-dimensional modeling method under multiple features constraint Download PDFInfo
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Abstract
The invention discloses the salt chamber wall rock geology three-dimensional modeling method under the constraint of a kind of multiple features.During the method utilizes multi-source data to carry out saliferous strata three-dimensional modeling, using test boring, triangulation network digital elevation model, border, mining area, mudstone foundation etc. as important feature constraint condition, make full use of landform, landforms and geologic feature that multi-source data discloses, build the saliferous strata threedimensional model reflecting true geological environment；Utilize sonar detection data, build salt chamber surface three dimension model, and as the constraint of internal hole, wait spatial analysis operation by means of three dimensions Boolean calculation and grid are discrete, it is achieved salt chamber wall rock geology three-dimensional modeling under multiple features constraint.The method of the present invention can construct the salt chamber wall rock geology threedimensional model of reflection true three-dimension geometric shape, provides effective computation model for salt chamber Rock Creep characteristics numerical simulation with analyzing, improves the safety using salt chamber to carry out energy reserves.
Description
Technical field
The invention belongs to a kind of three-dimensional modeling method, the salt chamber wall rock geology three-dimensional under the constraint of a kind of multiple features is built
Mould method.It relates to the ambits such as GIS, computer graphics, computational geometry, GMS, rock mechanics numerical simulation, specifically relates to
And multi-source data unity, three-dimension GIS spatial modeling and analysis, geology three-dimensional modeling and simulation etc..
Background technology
Rock salt has low-down Penetration Signature and good creep behaviour, it is possible to ensure the sealing in salt chamber, its mechanics
Performance is relatively stable, has damage self-recovery ability, it is possible to adapts to the change of internal pressure, is therefore formed after salt mining
Underground Dissolved Cavity becomes the main medium of countries in the world energy reserves.The huge thick salt dome formed from external marine deposit is different, China
Rock salt belong to more gyittja formed layer structure, there is the features such as salt layer thickness is little, mudstone foundation is many, buried depth is shallow.Profit
When carrying out energy reserves with the salt chamber set up in such a situa-tion, to rock salt geologic lithology and the stability analysis of salt chamber country rock
Particularly important with research, and the salt chamber wall rock geology threedimensional model how building reflection true three-dimension geometric shape is the studies above
Need one of primary key issue of solution.
Salt chamber country rock threedimensional model builds and is mostly by mean of finite element at present, finite difference grades numerical simulation software in fact
Existing, these numerical simulation software geology D modeling function are not strong, often actual geological environment carried out substantial amounts of simplification, do not had
Taking into full account rock salt stratigraphic-structural plane, also underuse sonar survey chamber data, the regular grid belonging to perfect condition divides.
And the geological environment of reality is extremely complex, there is the feature of the polytype such as point, line, surface, body constraint.Therefore, it is achieved Yi Zhongduo
Salt chamber wall rock geology three-dimensional modeling method under feature constraint is significant.
Summary of the invention
It is an object of the invention to provide the salt chamber wall rock geology three-dimensional modeling method under the constraint of a kind of multiple features, it utilizes three
Dimension GIS spatial modeling and analytical technology, carry out organization of unity and the expression of multiple features constraint, overcome existing salt chamber country rock compacted
Become simulation and analyze the shortcoming of inefficiency when three-dimensional geological modeling.
The basic ideas of the present invention are: test boring is the sampled data that formation information is the most directly perceived, accurate and detailed,
Triangulation network digital elevation model can express the topography and landform characters such as geomorphology information, geographical environment information, surface configuration, limit, mining area
Boundary's data can reflect the characteristic informations such as the geometric shape of ore body, locus, utilizes multi-source data to carry out saliferous strata three-dimensional
In modeling process, using test boring, triangulation network digital elevation model, border, mining area, mudstone foundation etc. as important spy
Levy constraints, make full use of landform, landforms and geologic feature that multi-source data discloses, it is achieved containing saline land under multiple features constraint
Layer 3 D model construction method, builds the saliferous strata threedimensional model reflecting true geological environment；Utilize sonar detection data, structure
Build salt chamber surface three dimension model, and as the constraint of internal hole, wait sky by means of three dimensions Boolean calculation and grid are discrete
Between analyze operation, it is achieved multiple features constraint lower salt chamber wall rock geology three-dimensional modeling method, it can build the true geology ring of reflection
The rock salt model of geological structure body in border.
For achieving the above object, the technical solution used in the present invention is as follows:
Salt chamber wall rock geology three-dimensional modeling method under the constraint of a kind of multiple features, comprises the following steps:
S1, multi-source data Organization And Management, it is used for the spatial data to salt chamber wall rock geology three-dimensional modeling and attribute data
Carry out organization and administration to process with integration；
S2, builds multiple features constraint lower rock salt stratum threedimensional model, will test boring, triangulation network digital elevation mould
Type, border, mining area and mudstone foundation as important feature constraint condition, make full use of landform that multi-source data discloses, landforms and
Geologic feature, it is achieved the structure of multiple features constraint lower rock salt stratum threedimensional model；
S3, builds salt chamber surface three dimension model, i.e. utilizes the cavity horizontal profile data that sonar detection technology obtains with vertical
Straight cross-sectional data builds salt chamber surface three dimension model；
S4, builds multiple features constraint lower salt chamber wall rock geology threedimensional model, the salt chamber surface three dimension i.e. generated with step S3
Model is the constraint of internal hole, by means of the spatial analysis operation that three dimensions Boolean calculation and grid are discrete, obtains step S2
Stratum threedimensional model process, with obtain support geography model calculate discrete volume elements unit.
Described step S1 particularly as follows: utilize Geodatabase data model to primary spatial data, original borehole data,
Virtual borehole data and sonar are surveyed chamber interpretation data and are carried out the associate management of spatial information and attribute information, build country rock ground, salt chamber
Matter three-dimensional modeling Various database, it is achieved multi-source data unity and management.
Concretely comprising the following steps of described step S2:
S2-1, modeling data processes: operated, to multi-source by spatial spreading, space interpolation and Delaunay Triangulation
Data be modeled before process；
S2-2, the initial earth's surface Triangulation Network Model of belt restraining builds: by borehole data, modeling zone boundary scope and mud stone
Sandwich face, as the constraints of three dimension strata model to be built, uses the Delaunay triangulation network developing algorithm of standard,
Foundation can express the initial earth's surface Triangulation Network Model of each formation beds topological relation of modeling region；
S2-3, multi-DEMs stitching processes: according to the lithology on different rock salt stratum, use multi-DEMs surface model, with ground
One triangle of the overlying strata Delta Network of layer is starting point, all trianglees on TIN face, each stratum of circular treatment, will
The triangulation network of upper and lower two geological interfaces in same stratum unites by a seam；
S2-4, builds middleware generalized tri-prism model: on the basis of the TIN face, stratum generated, one by one by triangle
Shape extends downwards generation generalized tri-prism model along boring direction, and as with middleware, it is achieved volume elements in the middle of multi-DEMs
Merge, thus build multiple features constraint lower rock salt stratum threedimensional model.
Described step S3 is particularly as follows: based on sonar detection data and half of data structure, utilize boundary representation model, to sound
The horizontal profile that detection of receiving obtains surveys chamber data and vertical section is surveyed chamber data and carried out salt chamber three-dimensional surface topology reconstruction, it is thus achieved that salt
Chamber 3 d surface model.
Concretely comprising the following steps of described step S4:
S4-1, the salt chamber surface three dimension model that stratum threedimensional model and step S3 obtaining step S2 obtains carries out three-dimensional
Space intersection detection and Boolean subtraction calculation operate；
S4-2, carries out the tetrahedral grid discrete operations of multiple features constraint to the surface model after step S4-1 processes,
Thus build salt chamber country rock volume elements threedimensional model；The step that implements of tetrahedral grid discrete operations is: 1. reading is treated discrete
3 d surface model, including outer boundary and internal point, line, surface, the feature constraint information in hole；2. to advancing in wave-front method
Size Control function carries out constraint process and prepares with forward position, initializes forward position queue；3. forward position iteration advances, and completes initial mesh
Discrete and kernel subdivision；4. carry out network topology optimization and geometry optimization, improve the quality of grid cell.
Beneficial effects of the present invention:
The present invention can construct the salt chamber wall rock geology threedimensional model of reflection true three-dimension geometric shape, it is possible to encloses for salt chamber
Rock creep properties numerical simulation provides effective computation model with analyzing, and improves the safety using salt chamber to carry out energy reserves
Property, construction and rational exploitation for salt chamber provide scientific basis and technical support.
Accompanying drawing explanation
Fig. 1 is the flow chart of the embodiment of the present invention；
Fig. 2 is the salt chamber wall rock geology three-dimensional modeling multi-source data organization chart of the embodiment of the present invention；
Fig. 3 is rock salt stratum based on the multi-source data three-dimensional modeling flow chart of the embodiment of the present invention；
Fig. 4 is a) threedimensional model on certain survey region rock salt stratum of the embodiment of the present invention；B) fence diagrams of threedimensional model；
Fig. 5 is that a) entity of the three dimensions surface model of certain cavity of the embodiment of the present invention shows；B) wire frame shows；
Fig. 6 is a) the entity patterns figure of the salt chamber country rock said three-dimensional body meta-model of the embodiment of the present invention；B) wire frame mode figure.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that detailed description of the invention described herein only in order to explain the present invention,
It is not intended to limit the present invention.
Salt chamber wall rock geology three-dimensional modeling method under a kind of multiple features constraint of the present invention, comprises the following steps (such as Fig. 1
Shown in):
1, multi-source data Organization And Management, for entering spatial data and the attribute data of salt chamber wall rock geology three-dimensional modeling
Row integration management；
2, multiple features constraint lower rock salt stratum threedimensional model is built, for realizing test boring, triangulation network numeral
Elevation model, border, mining area, mudstone foundation etc., as important feature constraint condition, make full use of the ground that multi-source data discloses
Shape, landforms and geologic feature, build multiple features constraint lower rock salt stratum threedimensional model；
3, building salt chamber surface three dimension model, the cavity horizontal profile data being used for utilizing sonar detection technology to obtain are with vertical
Straight cross-sectional data builds salt chamber surface three dimension model；
4, build multiple features constraint lower salt chamber wall rock geology threedimensional model, be used on the basis of the constraint of internal hole, by
Operate in three dimensions Boolean calculation and grid discrete space analysis, stratum threedimensional model is processed, support ground to obtain
Learn the discrete volume elements unit that model calculates.
It is as follows that the present embodiment implements process:
1, multi-source data Organization And Management process:
This process refers to for modeling data source diversity, data form multiformity, data association complexity and data
Magnanimity feature, for ensureing carry out salt chamber wall rock geology three-dimensional modeling efficiently and analyze the needs of application, utilizes
Geodatabase data model to collection to primary spatial data, borehole data and sonar survey chamber interpretation data etc. and carry out
The associate management of spatial information and attribute information, builds wall rock geology three-dimensional modeling data storehouse, salt chamber, it is achieved multi-source data whole
Closing and management, provide data source complete, comprehensive for follow-up modeling work, multi-source data organization chart is as shown in Figure 2.
2, rock salt stratum threedimensional model process under multiple features retrains is built:
This process builds multiple features constraint lower rock salt stratum threedimensional model by a series of process and operation, comprises and builds
The process of modulus evidence, the initial earth's surface Triangulation Network Model of belt restraining build, multi-DEMs stitching processes and builds middleware GTP mould
Four subprocess of type.(1) in the processing procedure of modeling data, to the geo-spatial datas such as survey region border and DEM,
The basic geological datas such as matter plane graph and log sheet and borehole data carry out multi-source data unity, then comprehensively utilize sky
Between discrete, space interpolation and Delaunay Triangulation method realize rock salt stratal surface matching；(2) on the initial earth's surface of belt restraining
In Triangulation Network Model building process, using borehole data, modeling zone boundary scope, mudstone foundation structural plane as three-dimensional to be built
The constraints of stratigraphic model, uses the D-TIN developing algorithm of standard, and foundation can be expressed each formation beds of modeling region and open up
Flutter the D-TIN model of relation；(3) during multi-DEMs stitching processes, according to the lithology on different rock salt stratum, multilamellar is used
The thought of DEM, with a triangle of the overlying strata Delta Network on stratum as starting point, on TIN face, each stratum of circular treatment
All trianglees, the triangulation network of upper and lower for same stratum two geological interfaces can be united by a seam；(4) middleware is being built
In GTP model process, on the basis of the stratal surface TIN generated, one by one triangle is extended downwards along boring direction generation
GTP model, and as with middleware, it is achieved the merging of volume elements in the middle of multi-DEMs, thus complete the rock salt under structure feature constraint
The structure of stratum threedimensional model.Fig. 3 is rock salt stratum three-dimensional modeling flow chart, and Fig. 4 a is certain survey region rock salt stratum three-dimensional mould
Type, Fig. 4 b is the fence diagrams of certain survey region rock salt stratum threedimensional model.
In process (2), initial earth's surface Triangulation Network Model is considered as determining that the one of modeling regional stratum topological relation
Individual " template ", it can put off along boring bearing of trend whole formation informations in modeling region from top to bottom；Such behaviour
Can ensure that each formation beds has topological relation that determine, unanimous between the higher and lower levels so that modeling earth's surface, region defines one
Individual continuous print is overall.
3, salt chamber surface three dimension model process is built:
This process, based on sonar detection data and HalfEdge data structure, utilizes boundary representation model (B-Rep), to sound
Horizontal profile and vertical section that detection of receiving obtains are surveyed chamber data and are carried out salt chamber three-dimensional surface topology reconstruction, it is thus achieved that salt chamber three-dimensional table
Surface model.The feature of boundary representation model is to be come position and the shape of definition space object by face, ring, limit, point, builds such
Model is conducive to carrying out the operation of various geometric operation based on face, limit, point.Fig. 5 a is the three dimensions surface modes of certain cavity
Type entity shows, Fig. 5 b is that the three dimensions surface model wire frame of certain cavity shows.
4, salt chamber wall rock geology threedimensional model process under multiple features retrains is built:
This process realizes the structure of the salt chamber wall rock geology threedimensional model under multiple features constraint, comprises three dimensions and intersects inspection
Survey and Boolean calculation operation, two subprocess of tetrahedral grid discrete processes of multiple features constraint.Three dimensions intersects detection
One quickly intersects detection algorithm with being applicable between three dimensions object, and this algorithm is first according to spatial object distribution spy in scene
Levy, build case point and list thereof；Utilize spacescan strategy, build a series of imaginary spacescan face adaptively；?
During scanning plane moves, the state of spatial object is divided into dead state, activated state and dormant state, by only to being currently at
Activated state spatial object carry out test for intersection, considerably reduce crossing calculating unnecessary between spatial object, and then permissible
It is effectively improved the efficiency of Boolean calculation between spatial entities.(1) in three dimensions intersects detection and Boolean calculation operating process, right
Multiple features constraint lower rock salt stratum threedimensional model obtained by above-mentioned steps does Boolean subtraction calculation with salt chamber 3 d surface model,
Obtain salt chamber country rock 3 d surface model, during Boolean calculation, perform quickly to intersect detection algorithm, accelerate Boolean calculation speed
Degree；(2) during the tetrahedral grid discrete processes of multiple features constraint, the surface model obtained after Boolean calculation is carried out four
Face volume mesh is discrete, builds salt chamber country rock volume elements threedimensional model, i.e. salt chamber wall rock geology threedimensional model, discrete rear effect such as Fig. 6
Shown in, Fig. 6 a is salt chamber country rock said three-dimensional body meta-model entity patterns figure, and Fig. 6 b is salt chamber country rock said three-dimensional body meta-model wire frame mode
Figure；In view of self complicated feature of rock salt country rock spatial object, the present invention is to current most popular general full-automatic grid
Discrete method advances wave-front method (AFT) to be extended, make it fully to take into account salt chamber country rock spatial object outer boundary and
Feature constraint such as internal point, line, surface, hole etc., develops tetrahedral grid discrete method, and concrete implementation step is: 1. read in treat from
The 3 d surface model dissipated, including outer boundary and feature constraint information such as internal point, line, surface, hole etc.；2. the size control to AFT
Function processed carries out constraint process and prepares with forward position (being direction triangle unit), initializes forward position queue；3. forward position iteration pushes away
Enter, complete that initial mesh is discrete and kernel subdivision；4. carry out network topology optimization and geometry optimization, improve the matter of grid cell
Amount；The use of the method is that salt chamber country rock geoanalysis provides high-quality grid cell with calculating.
The above is only the preferred embodiments of the invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (5)
1. the salt chamber wall rock geology three-dimensional modeling method under a multiple features constraint, it is characterised in that comprise the following steps:
S1, multi-source data Organization And Management, for carrying out spatial data and the attribute data of salt chamber wall rock geology three-dimensional modeling
Organization and administration process with integration；
S2, builds multiple features constraint lower rock salt stratum threedimensional model, will test boring, triangulation network digital elevation model,
Border, mining area and mudstone foundation, as important feature constraint condition, make full use of landform, landforms and ground that multi-source data discloses
Matter feature, it is achieved the structure of multiple features constraint lower rock salt stratum threedimensional model；
S3, builds salt chamber surface three dimension model, i.e. utilizes cavity horizontal profile data that sonar detection technology obtains and vertically cuts open
Face data build salt chamber surface three dimension model；
S4, builds multiple features constraint lower salt chamber wall rock geology threedimensional model, the salt chamber surface three dimension model i.e. generated with step S3
Retrain, by means of the spatial analysis operation that three dimensions Boolean calculation and grid are discrete, the ground that step S2 is obtained for internal hole
Layer threedimensional model processes, to obtain the discrete volume elements unit supporting that geography model calculates.
Salt chamber wall rock geology three-dimensional modeling method under a kind of multiple features the most according to claim 1 constraint, its feature exists
In, described step S1 is particularly as follows: utilize Geodatabase data model to primary spatial data, original borehole data, virtual brill
Hole data and sonar are surveyed chamber interpretation data and are carried out the associate management of spatial information and attribute information, build salt chamber wall rock geology three-dimensional
Modeling Various database, it is achieved multi-source data unity and management.
Salt chamber wall rock geology three-dimensional modeling method under a kind of multiple features the most according to claim 1 constraint, its feature exists
In, concretely comprising the following steps of described step S2:
S2-1, modeling data processes: operated, to multi-source data by spatial spreading, space interpolation and Delaunay Triangulation
Process before being modeled；
S2-2, the initial earth's surface Triangulation Network Model of belt restraining builds: by borehole data, modeling zone boundary scope and mudstone foundation
Structural plane, as the constraints of three dimension strata model to be built, uses the Delaunay triangulation network developing algorithm of standard, sets up
The initial earth's surface Triangulation Network Model of each formation beds topological relation of modeling region can be expressed；
S2-3, multi-DEMs stitching processes: according to the lithology on different rock salt stratum, use multi-DEMs surface model, with stratum
One triangle of overlying strata Delta Network is starting point, and all trianglees on TIN face, each stratum of circular treatment, by same
The triangulation network of upper and lower two geological interfaces in individual stratum unites by a seam；
S2-4, builds middleware generalized tri-prism model: on the basis of the TIN face, stratum generated, one by one by triangle edge
Boring direction extends downwards generation generalized tri-prism model, and as with middleware, it is achieved the conjunction of volume elements in the middle of multi-DEMs
And, thus build multiple features constraint lower rock salt stratum threedimensional model.
Salt chamber wall rock geology three-dimensional modeling method under a kind of multiple features the most according to claim 1 constraint, its feature exists
In: sonar, particularly as follows: based on sonar detection data and half of data structure, utilize boundary representation model, is visited by described step S3
Survey the horizontal profile survey chamber data obtained and vertical section is surveyed chamber data and carried out salt chamber three-dimensional surface topology reconstruction, it is thus achieved that salt chamber three
Dimension table surface model.
Salt chamber wall rock geology three-dimensional modeling method under a kind of multiple features the most according to claim 1 constraint, its feature exists
In: concretely comprising the following steps of described step S4:
S4-1, the salt chamber surface three dimension model that stratum threedimensional model and step S3 obtaining step S2 obtains carries out three dimensions
Intersect detection and Boolean subtraction calculation operates；
S4-2, carries out the tetrahedral grid discrete operations of multiple features constraint to the surface model after step S4-1 processes, thus
Build salt chamber country rock volume elements threedimensional model；The step that implements of tetrahedral grid discrete operations is: 1. reads in and treats discrete three
Dimension table surface model, including outer boundary and internal point, line, surface, the feature constraint information in hole；2. to the size advanced in wave-front method
Control function carries out constraint process and prepares with forward position, initializes forward position queue；3. forward position iteration advances, and completes initial mesh discrete
And kernel subdivision；4. carry out network topology optimization and geometry optimization, improve the quality of grid cell.
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