Construction And Regeneration Of Three-dimensional Geological Model Baseon Swarm Intelligence Algorithm

As research of three-dimensional geological model, it becomes one of the most important aspects of development in earth sciences. Three-dimensional geological model has become the basis of spatial analysis of geological, geological phenomena explained, evaluation of mineral resources and underground space utilization. However, due to the complexity of the geological data and geological structure, the three-dimensional geological model constructed becomes very difficult. Although the three-dimensional geological model theory research and software development make some achievements, it also has problems as follows:(1) The construction of three-dimensional geological model is largely dependent on the professional knowledge of the geological workers, and the result of the model construction is not accurate enough;(2) The modeling process of three-dimensional geological model is very tedious and the efficiency of model construction is low;(3) Updating difficulty in three-dimensional geological model and the new exploration data can't be updated.Based on the extensive literature reading, this thesis analyzes the research focus and difficulty of three-dimensional geological model technology related fields. Under the premise questions above, some further research of three-dimensional geological constructed has been finished, such as:(1) Some studies have been done in the interpolation algorithm of three-dimensional geological model constructed. Under the premise of the algorithm by means of swarm intelligence, this thesis proposes an optimization algorithm(ABC-Kriging), to optimize the parameters of variogram in Kriging, and utilizes borehole data to finish a contrast experiment. The results show that: Kriging algorithm can be optimized by artificial bee colony compared with ordinary Kriging algorithm and PSO-Kriging algorithm, the errors were reduced by 35.7% and 26.6%. Besides, this algorithm overcomes the traditional method parameters set subjectivity and makes geological model construction with higher precision.(2) The traditional 3D geological model is divided into many complicated steps and model construction is very complicated. Based on the basic theory of three-dimensional geological modeling, this thesis makes some study in the construction of irregular triangular mesh and multi-DEM method. By using the experimental data, the model has been realized under the envelope surface of the cured method, which can improve the forming process and improve the efficiency of the model construction.(3) In the actual geological situation, with advance of geological work, the topography will change in region. Therefore, this thesis analyzes the method of dynamic updating of 3D Geological model and realized the local updating method based on the extended boundary in theoretical. Finally, this thesis uses script driven update method to update model. Through this method and tradition manual model updating method is compared and analyzed, the result show that, under the same premise of the data processing time, the update method based on script driven is reduced by 54% compared with the traditional manual method. It also verified the feasibility and effectiveness of this method, in further, it provides the basis for the construction of three-dimensional geological model system.(3) Based on the above problems, this thesis uses ArcGIS Engine 10.0 to develop a three-dimensional geological model system. This system can realize the updating, modeling and visualization. In addition, this thesis introduces the development way in key technologies, system design and other aspects.