Resumen:
Proper design and safe execution of impermeable barriers in tailings dams ensure the
reliability of the use of various geosynthetics as reinforcement, containment and
waterproofing materials in mining. And of this technical solution, it is bound to guarantee the
maintenance of the parameters and properties inherent to each type of material used, which
give them the necessary qualities and performance, throughout the period required by the
geotechnical project. The Vanadium de Maracás S / A project is located in the municipality of
Maracás / BA and will be built in three stages, with a final capacity forecast of the nonmagnetic repository of the vanadium ore No. 4 (BNM-04) of 1,047,532.57m³ of non-magnetic
waste. In order to guarantee adequate sealing parameters in the bottom and slopes of this
basin, a four-layer waterproofing system of geosynthetics was used, consisting of a nonwoven geotextile, and a double layer of HDPE geomembrane separated by a geodrene system
( georrede in HDPE). The objective of this research is to evaluate the geotechnical behavior of
the BNM-04, through the analysis of the safety model adopted for leakage detection, physical
and mechanical properties of the different reinforcement materials used in laboratory
characterization tests and durability in the field, as well as the analysis of non-magnetic
vanadium tailings characteristics. In spite of the fact that the physical and mechanical
characterization of the different materials used in the work were carried out, we did not
predefine the comparative analysis with the technical datasheets of the manufacturers to
verify inconsistencies, but rather the understanding of the model as a safe and excellent
performance system. The durability tests were not evaluated in this study, due to the long
duration of the procedure. The non-magnetic vanadium reject was designated as a sandy silt
with traces of dark gray clay.
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