Muestreo de minerales: análisis de sensibilidad y factores de corrección para la ecuación de Pierre Gy

Pierre Gy's equation is widely used in ore sampling. This equation is based in four parameters: shape factor, size distribution factor, mineralogical factor and liberation factor. The usual practice is to consider fixed values for the shape and size distribution factors. This practice does not represent well several important ores. The mineralogical factor considers only one specie of interest and the gangue, leaving out other cases such as polymetalic ores where there are more than one specie of interest. A sensibility analysis to the Gy's equation factors was done and a procedure to determine specific values for them was developed and presented in this work. Mean ore characteristics, associated with an insecure use of the actual procedure, were determined. Finally, for a case study, the effects of using each alternative were evaluated.