oa GIS technology in the geological and technological modeling of iron ore deposits

Geological and technological mapping is one of the main areas of activity of the geological service of mining enterprises. It makes it possible to assess the reserves of technological types and varieties of ores, their spatial distribution within deposits, and to carry out rational, complex development and processing with a forecast of geological and technological properties. Technological mapping’s efficiency is provided with using of geological and technological models of the deposit. These models were developed in the process of structural and technological mapping of BIF deposits within the Kryvyi Rih region.

To link the structure between the ledges, one of several options is selected: matching using polynomials, polyharmonic functions, or cubic splines. The experience of BIF deposits mapping within the Kryvyi Rih region shows that the most preferable results are obtained using cubic splines.

For deposits with a complex structure, the combination is carried out taking into account the structure of the deposit (the presence of tilted folds, breaking faults). Better results are obtained using interpolation splines. Deposit’s models done with this method in the best way describe geological structures. In areas of deposits with highly developed multi-order folding or complicated by folds of drawing, good results are obtained by interpolation using polyharmonic functions. The creation of geological and technological maps and sections using polynomials gives acceptable results only in certain sections of deposits characterized by monoclinic or slightly folded beds of layers of ferruginous quartzites and schists, not complicated by large folds of fractures.