In order to solve the problems about automatic drawing of complicated geological faults, a series of approaches are proposed. Based on the practical geological exploration, original data are collected, analyzed, standardized and stored in computer. The modeling methods of single fault are discussed, including linear fault and irregular fault. Based on topological relations between faults and the degree of their importance, the faults are divided into several levels. According to the levels, the cutting relationships of strata and faults, faults and faults are determined. Then the shapes of multi-faults and strata can be drawn automatically. We have used measured data to verify these methods. The results show that they are effective and feasible. And they can provide sufficient raw data for three-dimensional modeling based on sections.
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