Lytvyniuk, S. (2024) OPTIMIZATION OF ORE DEPOSIT MINING SYSTEMS WHILE CHANGING CUT-OFF PARAMETERS FOR RESERVES ESTIMATION. UNIVERSITAS Publishing. с. 61-70.

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English abstract

The paper defines the basic cut-off parameters for the reserves calculation of ore deposits, which affect the ore body morphometry. The optimal choose of the cut-off parameters ensures the substantiation of effective opening and extraction systems. For deposits that have been exploited for a long period, the use of irrelevant cut-off parameters may lead to the need to partially change mining systems and reduce the efficiency of economic indicators. The study determined typical cut-off parameters for iron ore deposits. The example of an underground iron ore mining deposit was analyzed, where it was necessary to partially change the mining system due to the presence of small isolated ore deposits. As an alternative option, the cut-off parame- ters were reevaluated, additional parameters were implemented - minimum ore re- serves in isolated ore bodies and economical cut-off grade. The implementation of these parameters made it possible not to change the mining system and to improve the ore grade. The use of parameters of minimal isolated ore deposits also reduces loss and clogging of mineral compared to design solutions. According to forecast calculations, this option of mining development will provide greater indicators of economic efficiency.

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