Summary of present knowledge on the representative sampling of ore in the mining industry

摘要

The paper discusses some theoretical aspects of Gy's sampling theory and provides reasons as to why it has found limited use in the mining industry, particularly for ores with low concentrations of values such as gold. These types of ores are referred to as low-grade ores in the paper. It is shown that the misuse of the a priori iberation factor proposed by Gy is the main reason for the implementation limitation of Gy's model for low-grade ores. In addition, results of a case study done at the Gencor Geostatistics Department based on the new implementation of Gy's theory are provided.