Geological interface three-dimensional morphological analysis method based on TIN (triangulated irregular network)

Abstract

The invention discloses a geological interface three-dimensional morphological analysis method based on TIN (triangulated irregular network), which comprises the following steps: based on the use of a three-dimensional TIN model to simulate the geological interface, using the principles of space geometry and computer graphics to calculate general geometrical morphology parameters (gradient, angle and the like) and distance fields of the geological interface; using space interpolation and trend residual analysis technology to extract the morphology trend and fluctuation of the geological interface in a grading way; and finally applying a geological interface three-dimensional morphological analysis result to the simulation of ore-controlled geological factor fields and the concealed ore body forecasting. The method can precisely and efficiently analyze and extract all morphology parameters of the geological interface and expresses ore-controlled geological factors quantificationally and has significance in concealed ore body three-dimensional quantitative forecasting.

Description

technical field [0001] The invention relates to a TIN-based three-dimensional shape analysis method of geological interface. TIN refers to Triangulated IrregularNetwork, irregular triangular network. Background technique [0002] Traditional GIS spatial analysis methods cannot effectively acquire and express ore-controlling geological factors. And combined with mathematical morphology, the 3D geological body morphological analysis method based on the 3D geological body grid model (Deng Hao's research on several technologies of 3D geological modeling and spatial analysis for hidden ore body prediction Changsha: Central South University 2008) (Mao Xiancheng, Tang Yanhua , Deng Hao’s 3D Morphological Analysis and Method of Geological Bodies, Journal of Central South University (Natural Science Edition), 2011), has the following disadvantages: the raster data model has a large amount of spatial data and low spatial accuracy, especially when expressing boundaries, it cannot accu...

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Problems solved by technology

[0002] Traditional GIS spatial analysis methods cannot effectively acquire and express ore-controlling geological factors

And combined with mathematical morphology, the 3D geological body morphological analysis method based on the 3D geological body grid model (Deng Hao's research on several technologies of 3D geological modeling and spatial analysis for hidden ore body prediction Changsha: Central South University 2008) (Mao Xiancheng, Tang Yanhua , Deng Hao’s 3D Morphological Analysis and Method of Geological Bodies, Journal of Central South University (Natural Science Edition), 2011), has the following disadvantages: the raster data model has a large amount of spatial data and low spatial accuracy, especially when expressing the boundary, it cannot accurately express the geological It is difficult to balance the generation speed, storage space and expression accuracy; the selection of the radius of the spherical structural element in mathematical morphology needs to be improved in terms of quantification; it is not suitable for trend analysis of thin-sheet geological bodies or geological bodies with narrow parts. When the radius of the structural element is large, the trend pattern will have a fracture error, because the narrow part of the geological body will be removed as a local undulation due to the filtering operation, resulting in a fracture

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