| The geological phenomenon is extremely complicated, the traditional plane graphs can't be very easy to express their space structure. With the deepening that the geologist studies to the structure characteristic of geological body and development of computer figure technology, every field becomes more and more urgent to the demand for carrying on three-dimensional modeling of the geological body structure. Space structure that the geological model of the three-dimension is used for describing the geological body is complicated, reflect the spatial relationship among the geological key elements, for the correct judgment, analyzing that offers the comprehensive geological information with visual three-dimension to the geological question of geological expert. The three-dimensional modeling of the geological body structure includes the contents of two respects mainly: First, analyses the geological law, structure and reflect the geological structure model of the characteristic within the body; Another on one hand the visual expression of the geological structure model, namely adopt the proper space data structure to describe the structure model. It is a foundation of geological modeling of the three-dimension to structure the geological structure model, its essence is to carry on systematic a analysis to the structure characteristic of geological body.The area loose medium structure is complicated, rock space distribution embodies uncertainty made up in sudden change and gradation zone, at the same time the situation of the different looks is very general; And the geologic prospect data are relatively rare, it is far unable to control all rock changes. Three ripe link the geological modeling method yet at present, mainly study and relatively lag behind to the structure model of the loose medium. This text attempts to proceed from structure network analysis of loose medium, propose analyzing the modeling method in level based on geological law, regard basin of Linfen as the instance, set up the geological model of loose medium three-dimension of basin. The research contents and step of the whole thesis are as follows:(1) Direct against the domestic and international research current situation about three-dimension geological modeling theory and technology at present, the forefathers explaining it study the direction laid particular emphasis on and existing problem, have proposed the thinking of research of this text.(2) Combine the general theoretical foundation of geological modeling of the three-dimension, has discussed the goal demand for three-dimensional modeling of loose medium of area used in the face of hydrogeology and difficult point, point out the solution is to carry on network analysis to the loose medium structure, has proposed analyzing the modeling method in level based on geological law, resolve geological interface, stratum entity into and deposit looks three geological model alone of level complicated area loose geological body, thus resolve the complicated problem to open, benefit to solve one by one.(3) Basin loose medium structure of Linfen of network analysis. Form the research that is evolved to set about from the basin, to the basis shape of the earth's surface, the stratum is distributed in the characteristic, area and deposited and is distributed and the rock changed the law three respects carried on network analysis to the basin loose medium structure of Linfen in every eras.(4) To Linfen basin loose medium structure characteristic, make divide into geological interface modeling, stratum modeling, deposit looks modeling scheme of modeling step by step of 3 steps. The looks modeling that among them deposit correctly, this text puts forward the method that the stratum entity's model level cuts into slices. Depositing on storey loosely generally relatively within the basin, in certain area is often the sediment of the same geological period, main side that deposit to level roughly, deposit phase can carry on the rock inserting value in the horizontal direction in a certain; The level cuts into slices and cuts the apt control which realize the precision of models of the thickness into slices through adjusting. Whether deposit the modeling step of phase. Carry on competence to cut to the stratum entity's model which includes the fault into slices first, get the horizontal stratum thin slices of the boundary line and fault line in geological epoch, then analyses to the contemporary sediment in every horizontal stratum thin slice the rock, finish the dividing area of rock.(5) Design the basic procedure of geological modeling of loose medium three-dimension of basin of Linfen: Basic space information is gathered and put in order; Entity's model is structured; The analysis, rock are filled with depositing. Carry on Linfen basin loose medium geological interface modeling sequentially, stratum entity modeling, deposit the modeling of phase. Among them the modeling of the geological interface structures the earth's surface and Q4, Q3, Q2, Q, N every stratum bottom interface three dimensional model through TIN model, adopting some TIN at the same time and encrypting the law will carry on modeling to the main fault plane of basin of Linfen; Carried on space set operation and got Q4, Q3, Q2, Q and N every eras stratum entity by each geological interface model; Deposit looks to be modeling relatively complicated, base area with shallow 20 interval, so as to dark 50 300 300 of form --Meter of precisions, receive 46 level cut into slices, then section the combine area deposit looks distribution map and hole rock datum go on rock nature fill altogether.(6) The geological model of loose medium three-dimension of basin of Linfen is realized. Make the stratum rock thin slice of high Cheng each above sea level up, get the visual model which includes stratum rock space distribution, this three-dimension with power of model shows and three-dimensional space information inquiry function dynamically. Modeling of sedimentary is rather complicated, but 46 horizontal slices has been obtained through section of the 3D strata model, with interval of 20m for embedded depth that are less than 300m and 50-100m for embedded depth that are above 300m.(7) Sum up the concrete conclusion of this research, put forward relevant suggestions on further research.
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