PRINCIPLES OF QUALITY UNIFORMITY STABILIZATION OF MULTI-GRADE ORES IN THEIR OPEN-PIT MINING

https://doi.org/10.48498/minmag.2026.251.3.005

An analysis of industrial development experience in deposits with complex mineral compositions indicates that improving the efficiency of raw material resource utilization requires the advancement of mining technologies for complex-structure ores. This paper presents the results of experimental research on the quality averaging of ore types and grades during the open-pit mining of complex polymetallic deposits. The authors propose a comprehensive efficiency criterion based on the Hancock and Gaudin-Kelsall approaches, which accounts for the separation process during ore beneficiation. The application of this criterion enables the management of quality homogeneity for multi-grade ores when extracted separately or as a blend. Furthermore, dependencies have been established for metal recovery into concentrates during the flotation of refractory and mixed lead-zinc ore blends.

T. Kumykova, G. Nurshaiykova, *A. Akylbaeva, T. Malgazhdarov