The Research On The Computer-Aided System Of Mineral Reserve Visualized Computation In Three Dimensional Geosciences Space

It has a very important role to improve and perfect the level of geological resourcesexploring, and increase the intelligentized and automatized level of mineral reservecomputation. With the rapid development and maturity of computer graphics and databasetechnology , integrating three dimensional visualization technology with reservecomputation has become an significant research trend. This study is one part of national"863"project《the Advanced Technology of SpacialInformation acquiring and disposal》. Based on the task of "the system of three dimensionalintelligent analysis and visualization in geosciences space"(2002AA135160), this researchinvestigates the three dimensional data model and the method of modeling, and studies theapplication in reserve computation of special geostatistics. Through transiting the geologicaldata the system establishes 3-D model of drills, and constitutes 3-D model of geologicalbody. The model of reserve computation is built and the metal values of ores are obtained bydifferent methods. At last, a means of COM designing in the Computer-Aided System ofVisualized Computation of Mineral Reserve in Three Dimensional Geosciences Space is putforward by taking use of the thought of reusable component model. This dissertation summarizes the situation of visualized modeling both here and abroadgenerally, investigates the data model and data structure, and discusses all kinds ofmethods of modeling in 3-D space which is divided into four kinds: the way based on body,the way based on surface,the way of integrated model and the panweighted way. Thekey arithmetic of the Computer-Aided System of Visualized Computation of Mineral Reservein Three Dimensional Geosciences Space is investigated which the integrated model isadopted: the border of geo-body is described by vector, and the inner attributeis described by geostatistics, thereby, the geometrical attribute and topologicalrelation of the special object is characterized, and the reserve of geo-body can becomputed correctly.The requirement analysis and the general design of this system is clarified whichincludes the development environment,general structure and function design, and everypart of this systerm is integrated and realized. Based on the traditional work flow of thegeological minerals, a effective work flow is put forward in the Computer-Aided System ofVisualized Computation of Mineral Reserve in Three Dimensional Geosciences Space whichincludes five steps: 3-D drill modeling,section editing,3-D geo-body modeling,blockdividing and reserve computation.The reason geostatistics is superior to traditional statistics is that the former providesnecessary theories and methods to describe special continuity, which is more rational thanthe later. In this system, the design scheme and the implementation method of thegeostatistics arithmetic is put forward which includes the computation and fitting ofvariogam,all sorts of krige computation and conditional simulation.In the Computer-Aided System of Visualized Computation of Mineral Reserve in ThreeDimensional Geosciences Space, a method is provided which can deal with the spacial griddata and spacial vector data separately, the vector data is used to describe the border of thegeo-body, and the grid data is used to interpolate. By this means, the method of 3-Dvisualized modeling and geostatistics are combined tightly, the process of the reservecomputation becomes visualized, and the system of visualized reserve computation underintellectual property of our own is realized.The thought of reusable component model in software development is very important,this dissertation generalizes the sort of the component model, including REBOOT model,3C model,CORBA model,EJB model and COM model, and discusses the theory of COMin detail. Moreover, this study explores a road of component mining software throughanalyzing the technology of component in the software of visualized reserve computation,and the COM of the Computer-Aided System of Visualized Computation of Mineral Reservein Three Dimensional Geosciences Space are designed, the implement of interface is given.As is proved in Ashele copper mine number 1 body, the application of modeling in 3-Dspecial and reserve computation in the Computer-Aided System of Visualized Computationof Mineral Reserve is effective, not only modeling the copper mine body but alsocomputing the reserve correctly. Comparing Vulcan with this system, the result of reservecomputation is satisfied. Another side, this system is used to Xicha gold mine area to helpthe explorer to analyze the shape of the mine body, and compute the reserve for economicestimation.In this paper the system of visualized reserve computation with the method of ordinarykrige is developed under the development environment of VC++.net and by means of OpenGL graphic function. It is the system that including 3-D modeling,reserve computation,reserve analysis, and realizes man-machine conversation,translating,zooming,rotating,rendering,roving and so on. This system can compute the reserve of geo-body through manymethods such as methods of Inverse Distance ,Section,Neural Net and Krige, and help thegeological workers to master the grid distribution of the geo-body generally and correctly byputting different color into different grid, so the geological worker can control the situationof the spread of copper mine. Therefore, this system provides decisions to the estimationand design of the mine, and prospects the wide foreground of the visualized computationapplication in the mine.