Improvement of Underground Leaching Technology while Ensuring Environmentally Safe Development of Ore Deposits


The restoration of consumption of goods and services leads to an aggravation of the problem of improving geotechnologies in the field of transition to sustainable mining. In addition, the primary mining of rich and disseminated ores, as well as the decrease in the profitability of mining enterprises in the increasingly difficult mining conditions for the development of reserves, do not allow using the advantages of the circular economy. In the context of the creation of new barriers to access to global markets, the low level of «greening» of production, as well as high levels of carbon footprint, can become a significant problem for the sale of domestic raw materials.

The purpose of the study was to substantiate promising areas for improving metal leaching technologies to ensure the sustainable development of ore deposits. As part of the first direction, the effect of the transition to rack and pinion drilling rigs to increase the operational efficiency of underground ore leaching was established. It was revealed that the drilling productivity, which determines the rate of reserves discovery, can be increased (under certain conditions) by 5 times. Moreover, this will allow the use of directional drilling for injection wells (for hydraulic fracturing and supply of leached solution) parallel to the ore body. Within the framework of the second direction, a mechanism for optimizing the topology of the technological network of production and injection wells in in-situ leaching is disclosed. At the same time, drilling volumes can be reduced by 2 times, with that, the development depth should not exceed 1000 m (based on the analytical studies). 

The practical significance of the totality of the results obtained consists in determining the technological parameters of an environmentally friendly in-situ leaching technology based on gas control points in combination with a suction method for supplying a leaching solution.

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DOI: 10.24000/0409-2961-2022-9-62-68
Year: 2022
Issue num: September
Keywords : desalination environmental safety mining ore deposits sustainable mining directional drilling rack and pinion machines
  • Dzhioeva A.K.
    Dzhioeva A.K.
    Cand. Sci. (Eng.), Assoc. Prof., North Caucasus Mining-and-Metallurgy Institute (State Technological University), Vladikavkaz, Russia