| As the degree of geological industry information continuous improvement, three-dimensional geological modeling technology has been continuously developed, which has become the research focus in mine geology, urban geology, geotechnical engineering and other fields.which applied more and more widely in a series major areas related to the people's livelihood.A multi-constrained underground complex three-dimensional model of the geological structure can be build through the use of geological data, and geological professionals can have an intuitive understanding of the geological structure of space and geo-spatial entities, topological relations, and enhance the understanding of complex geological structure and the ability of distinguish, which can provide validation and interpretation for the actual research work.Based on this, we can analysis the geological flexible and convenient, which help for decision-making for the utilization of underground space planning and regional development scientifically and rationally.There are many kinds of geological data sources which three-dimensional geological modeling relied on, including:borehole data, geological cross-section map, contour map, faults and folds and other structural data. Borehole data is a kind of high creditable data, which reflects the position of the detailed exploration of layered strata. The final level of three-dimensional geological model is determined by the density of the drill point; profile data, which comes from drilling information and geophysical interpretation, is a kind of complex data in the whole modeling sources-data, and reflects the whole stratum framework of the modeling region. The profile also reflects the fault structure information, and also introduces the geological expert knowledge and experience in the mapping; the middle of map data reflect the formation of the horizontal surface at a depth of the stratum area, which not only include the original geological information, but also contains the geological expert experience; formation of roof contour data mainly tracked by measuring point and drilling from hierarchical data, which including the geological knowledge of experts, faults and folds and other structural data comes mainly from the interpretation of geophysical data, but the credibility is low. However, but it's introduction will increase the complex of the geo-model. Using data centers of MapGIS K9+plug-in framework for data management, multi-source geological data extraction and integration can support the dynamic expansion of modeling data sources.The main idea of building the multi-constrained model of the complex three-dimensional geological structure quickly is:use the triangulated irregular network as the data model, analysis the characteristics of the various modeling data sources comprehensively, use cross-grid of the geological cross-section of data as the main body,, carve out of fields like the model of the word cell in the cell simultaneously according to cross-profiles to determine the spatial structure of regional modeling,and bind other types of geological modeling of data sources. Fusion and merging the modeling-data, point-like data sources and linear data sources are formed, then build each successive establishment of the cell-surface model the geological strata from top to bottom by quick search the dotted line data sources of each stratum. In the process of the establishment of the geological surface model, geological constraint information professionals are allowed to use the interactive editing tools of three-dimensional geological modeling which provided by algorithms, and add or adjust the model parameters immediately, which in order to amend or smooth the geological surface model. When all cells of the geological surface model have been established, we merger the same kinds of geological formation properties of surfaces, cut off the intersection of geological surface model by using editing tools and geological strata intersecting surface processing tools to ensure that the geological surface space topological correctness. Finally, we build all the geological body of the entire modeling region automatically by algorithms which based on the laws of geological surface space topology, and assign to the geologic body formation associated attributes. The building of complex geological body block is reflected in these areas:the rapid introduction of modeling data sources, rapid integration of data sources, quick search fused modeling data sources based on conditions of formation properties and spatial and rapid construction based on the geological surface topology.With the update of modeling data source and new constraint modeling data source joined in, the model will be changed in the local, and need be reconstructed. This paper has reconstructed the geological body space conflict by providing three-dimensional geological model of the geological point of geological lines, geological surfaces and a variety of geological bodies editing tools, which providing a partial model of an interactive editing, and through geological bodies Boolean operations.Can the establishment of three-dimensional geological model be carried out quantitative analysis of models or not depends on accuracy of the modeling. This paper has discussed the causes of model errors form modeling data sources and modeling analysis of three-dimensional geological model of quality assessment methods, and discussed the technology of model error correction. Based on the high-precision three-dimensional geological model, paper model of quantitative analysis of research methods are represented, including:interactive and query tools of three-dimensional model, three-dimensional model cross-cutting with arbitrary mode, and Boolean operations between geological body, the algorithm of three-dimensional model of generate two-dimensional geologic maps, the method of model length, direction, area and volume calculations, structural model and attribute model of the integration of visualization and analysis methods, as well as the professional analysis method through the model mesh generation in combination with the specific geology.This paper in the full three-dimensional geologic simulation in the absorption and the research results home and abroad, based on the multi-constraint conditions around the rapid modeling and high-quality modeling as two basic points, elaborating the data model, analysis a series of technical problems faced in the process of modeling, verify the efficiency and accuracy of modeling algorithms by combining different parts of the geological characteristics of model. The research work is as follows:(1) Discuss the three-dimensional geological modeling technology research status from the expression of geological information from the three-dimensional, three-dimensional geological model construction and related software and applications research in the field, and fully comparison and analysis of the strengths and weaknesses of existing data model, proposed multi-constrained under the condition of geological data elements of the TIN network which based on geological model as three-dimensional model data, described right direction and handling of topology of the model, and identified the main research objective and contents of this paper.(2) Analysis the multi-source geo-data multi-constrained in their own characteristics and offered in a modeling area, a variety of data sources must be in the same parameter controlled by a standard formation. The method of guidance and detailed standardization of multi-source data and frame-based plug-in data extraction, data checking and consistency of treatment options,and raise more constraints to build a complex geological structure of the model which is depended on three-dimensional factor model, and provides a new way of thinking for multi-source data fusion of the practice of geology.(3) Propose a set of rapid modeling methods suitable for different geological characteristics and different regions of the multi-constraints of a complex geological structure, study how to minimize human interaction modeling, and how to improve the efficiency of modeling at the premise of ensuring model accuracy. Cross-section of grid data is the core data source of this algorithm, quickly and support the quantitative analysis is the two important characteristic. This paper focuses on with fracture under the complexity of the phenomenon of complex geological structures quickly build method and three-dimensional surface model reconstruction partially method based on multi-constrained data fusion.(4) Discuss the three-dimensional geological model of quality evaluation methods and theories with the analysis of three-dimensional geological model based on the sources of error. We analyze the causes of errors of the three-dimensional geological model, and put forward methods of error detection, and summed up the quality of the model evaluation theory, Discussed the model error correction methods from several aspects, such as the method of geological cross-section and the method of virtual-hole amendment act amended.(5) Study of quantitative analysis method of the geological structure based on the high-quality three-dimensional model. In this paper, we discussed the thesis of the cutting technology of the three-dimensional geological model, including the construction of an arbitrary cut surface, an arbitrary surface cutting of the geological model, Boolean operations between geological bodies and plans and profile generation based on three-dimensional model, and so on. Describes the calculation method of the three-dimensional geological model, include the calculation of space distance and direction, area measuring and calculation, volume calculation, production-like computing and inquiries. Discuss the amalgamation of the structure model and attribute model, and the visualization technology, and the modeling of structural properties and statistical analysis. Present the professional calculation method of three-dimensional model of the geological structure combination with geological expertise:first, the geological structure of the cell subdivision of three-dimensional model, and then a professional analysis, such as engineering stress analysis of geological, hydrological and geological groundwater flow analysis.To sum up, the main results and innovation of this paper are as follows:(1) The complex geological structure of the model is presented, which cross-profile data as the main geological data and covering the multi-source data.Analysis the elements of this data model and the spatial topological rules.(2) The method of rapid modeling of the complex geological structures by using the multi-constrained geological data is presented, which not only guarantee the accuracy of the model, but also to ensure the efficiency.(3) Study a variety of three-dimensional geological structure model of quantitative analysis methods, such as the model calculation, model cutting and model analysis combined the professional evaluation of three-dimensional geology.(4) Complex multi-constrained geological model building and quantitative analysis of prototype system are developed, the main goal of which is multi-constrained, fast and high-quality.In this study, we combined our modeling methods and techniques and practical application, got some certain findings and results, extensive the research methods simulation of three-dimensional geological, and also provide experience for the three-dimensional modeling system intelligently science research latterly.
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