Abstract
Relevance and Objectives. This article looks at the important problem of reinforcing the non-ferrous metallurgy mineral base, which was weakened in the post-reform period, through the introduction in the production process of primarily non-ferrous metal ores that cannot be processed using conventional technology. Methods Applied. The methods applied include an analysis of the possibility to make use of non-active resources in the underground mining of metal ores using a combination of processes, which also include some conventional techniques, such as retrospective understanding of advanced practices from the uranium industry and interpretation of the results obtained. Outcomes. The authors formulated the principles of combining mining techniques for mining natural and man-made non-ferrous metal ore deposits following an eco-economic criterion. The authors give some historical information and their analysis of the in-situ leaching practices applied to uranium and polymetallic ores with balance metal content. Information is given on ways to use combinations of mining and processing techniques based on the use of improved conventional processes together with state-of-the-art technologies, which include the following: control over discrete rocks within a massif by filling the underground voids with hardening stowing mixtures of differentiated hardness, in-situ and heap leaching of mined metals and leaching in disintegrators with mechanical and chemical activation of the hardening mixture components. The articles also describes the conditions which can ensure efficiency of the leaching process. Findings. Combined mining processes designed for substandard reserves open up new prospects for concentrators dealing with non-ferous metals. Combining conventional mining processes with innovative metal leaching techniques provides a potential for mining companies to improve their economies through reasonable metal recovery and the possibility to use hardening mixtures made with recoverable mine and concentrator tailings for backfilling.
Keywords
Structural mechanics, underground mining, rock, massif, geomechanics, metal, leaching
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