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GEOLOGICAL AND MINING RISKS ASSESSMENT ON EXAMPLE OF UKRAINIAN BIF DEPOSITS
Abstract
Comparison of mining risks component was carried out on example of Ukrainian BIF deposits. The study object was one of deposits within Kryvyi Rih region which is exploited for iron concentrate and pellets production. We analyzed main geological, mining and business risks in international and national practices of risk assessment. It was defined that main components of international risk assessment of iron ore deposits is a risk associated with productivity, price and currency factors. For domestic deposits positive factors for risk assessment are significant degree of geological study, but we have a negative impact of regulatory and market factors. It was defined that specific components of geological risks for BIF deposits is unjustification of reserves? quality and quantity. Statistical analysis of quality and quantity parameters was done for Fe common grade, Fe grade associated with magnetite, thickness of ore bodies, processing indicators (Fe grade in concentrate, Fe extracting level, output of iron concentrate and pellets). It was defined that largest values of variation and associated risks are characteristic of Fe grade associated with magnetite and thickness of ore bodies with variation coefficient 0.26 and more 0.8 respectively. Processing indicators (especially Fe grade in concentrate, Fe extracting level) are relatively stable. The most sensitive indicator to changes in ore grade is output of iron concentrate and pellets.
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