Stupnik, M. I. та Kalinichenko, V. О. та Pysmennyi, S. V. та Kalinichenko, O. V. та Fedko, M. B. (2023) DEVELOPMENT STRATEGY FOR UNDERGROUND MINING OF RICH IRON ORES CONSIDERING LAND ALIENATION BY KRYVBAS UNDERGROUND MINES. UNIVERSITAS Publishing. с. 423-452.

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English abstract

According to preliminary estimates, by 2050, about 70% of mining enterprises in Kryvyi Rih iron ore basin will have exhausted their balance reserves of naturally rich iron ore or reached the maximum economically feasible depth of mining at current production volumes and with the current level of mechanization. Mining enterprises can prolong their performance by mining naturally lean iron ores (mag- netite quartzites) which amount to over 5.0 B t. Mining magnetite quartzites by systems with bulk caving of ore and overlying rocks requires abandoning a signifi- cant amount of iron ore reserves (over 60%) in protective pollars, or expanding mining and land allotments. Land has to be alloted towards residential and industrial sites of Kryvyi Rih. Land allotment expansion results in increased costs for compen- sating losses to enterprise owners and for land reclamation. Thus, it is advisable to mine magnetite quartzites applying systems that leave the daylight surface undis- turbed, improve the quality of the extracted mineral, increase extraction indicators and reduce disturbed land areas. The research findings can be used in underground mining of naturally lean iron ores at all mines of Kryvyi Rih iron ore basin when working out reserves to a depth of 500 m.

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