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So far, the methods of three-dimensional geological modeling are basically modeled from the original information such as borehole, but in the actual mining process, the overburden will produce deformation. In order to simulate the impact of resource development on terrain better, this paper presents a three-dimensional geological data model based on key stratum theory. This paper uses the original information such as borehole to construct the 3D geological model based on GTP, and determines the position of the sagging zone with the key stratum theory. Then we use the mathematical model of stratum movement in the sagging zone. Finally it renders the three-dimensional visualization of the sagging zone geologic model. The model simulates the change of the terrain after mining, and provides theoretical and material basis for the geological workers to make rational exploration and development decisions.

An Improved Three-Dimensional Modeling Method of Overburden Sagging Zone Based on GTP Model