Reliability of the Planned Consumer Quality of Ores Based on the Estimated Accuracy of Their Average Grade

Abstract

The relevance of the study stems primarily from the fact that it is the first time that the reliability of the planned quality of ores has been established by creating a methodological and applied framework for the prospective development of the presented method. The purpose of the study is to provide a validated guideline approach and applied mechanism for eliminating errors made when estimating the planned quality of ore products. The methods used include the analytical, functional, statistical, and other approaches. The method is based on the concept of qualimetrically averaged aggregate and frequency averaged grade totals, zonally based on distribution and homogeneity, using the qualimetric geoindicator property of modal ore quality characterisation. The study highlights the features of the method and analyses the errors that occur in its applications, considering the impact on the prospective use of the method. Based on the results of grade averaging, qualimetric maps are compiled showing the geological zones of high-grade, good-grade, average, and contour ores, stabilised at the level of natural minimum limits. The minimum limits for the deviation of the initial mining contents entering the processing plant from the planned contents have been experimentally proven to be feasible. The practical value consists of the application of the revealed results, solutions to errors in method development, reliability of this approach, which would help create geological and geometrical bases for the modernisation of processes of exploration, evaluation, preparation of reserves, reducing expenses for technical homogenisation, eliminating metal losses in mining wastes and tailings.