Abstract
The work analyzes current technologies of ore mining applying self-propelled equipment in underground conditions; studies practices of using the equipment in general and for broken ore transportation only; considers performance of mining enterprises in similar mining-geological and miningtechnical conditions; analyzes and generalizes causes of high ore loss and dilution rates in underground mining in Kryvyi Rih iron ore basin, thus revealing a problem of providing high efficiency and increased ore extraction with minimal quality deterioration. Marketable ore production is affected by decreased quality and high broken ore losses. Incomplete balance ore extraction when breaking and drawing ore from the stope results in deterioration of mining indices. Ore dilution with waste rocks leads to decreased ore content in the mined mass as compared with that in the ore massif. The research enables development and substantiation of the rational technology of ore drawing and transportation as well as designing a new structure of the loading face to ensure increase of the drawn ore quality indices.
Highlights
In Kryvyi Rih iron ore basin, iron ores have been mined for over 150 years [1,2,6,7]
Marketable ore production is affected by decreased quality and high broken ore losses
At first, mining operations were performed in open pits and later – in underground mines
Summary
In Kryvyi Rih iron ore basin, iron ores have been mined for over 150 years [1,2,6,7]. At first, mining operations were performed in open pits and later – in underground mines. First underground mines were only several dozens of meters deep. Main equipment applied was a pickaxe for breaking and horses for ore transportation. Underground mines are more technologically developed, efficient and secure. Namely principal and auxiliary processes, has become the main trend of their development [6,37,38,39]
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