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The PANDA technology applied to design and operation of tailings dams

PANDA technology is currently being used to regulate compaction and provide in-depth quality control for tailings deposits in Chile. This is owing principally to its rapid, non-destructive, portable, easy-to-use and environmentally sustainable testing which is based on normalized methods and able to produce immediate results.

In the last few years research has been undertaken with this technology in order to define Chilean tailings deposits from a geotechnical perspective and also consider the deposit’s spatial and temporal variability. To support this line of research, precedents, parameters and empirical correlations are presented here in order to determine compaction states and resistant properties which define the geotechnical behavior of tailings dams and thickened tailings deposits in Chile.

The information presented consists of the first band of a wide range of PANDA tests carried out on Chilean tailings deposits by the ‘Grupo Geotecnia de la Pontificia Universidad Católica de Valparaíso’ in conjunction with the company ‘Geotecnia Ambiental Ltda.’ This information has been correlated with geotechnical parameters via empirical and semi-empirical methods and statistics, establishing in the process correlations to estimate resistant parameters and states, like index density (ID), angle of friction (Φ) and undrained shear strength (Su).