Publicado

2018-04-01

Módulo de corte de relaves mineros a partir de ensayos de columna resonante

Shear modulus of mining tailings from resonant column tests

Palabras clave:

frecuencia de resonancia, módulo de corte, presión efectiva de consolidación, deformación angular (es)
resonant frequency, shear modulus, effective consolidation pressure, angular deformation (en)

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En este artículo se presentan los resultados de setenta y dos ensayos de columna resonante desarrollados en dos tipos de materiales provenientes de los depósitos de estériles de las minas de Riotinto (Huelva-España). La metodología de ensayo incorporó diferentes condiciones de presión efectiva de consolidación y nivel de excitación torsional. El equipo utilizado para la ejecución de las pruebas fue una columna resonante de base fija y extremo superior libre. Las presiones efectivas de consolidación se establecieron dentro de un rango variable entre 50 - 300 kPa y las excitaciones torsionales fueron iguales a 0.025, 0.05, 0.1, 0.2, 0.4 y 0.8 V. Se encontró que dichas combinaciones de ensayo conducen a deformaciones angulares que varían entre 0.003% y 0.148%. Los resultados indican que es posible establecer funciones empíricas sencillas del módulo de rigidez como una función de la deformación angular y de la presión efectiva de consolidación.
This article presents the results of seventy-two resonant column tests performed in two types of materials from the waste deposits of the Riotinto mines (Huelva – Spain). Methodology test included different conditions of effective consolidation pressure and torsional excitation level. The equipment used was a fixed-free resonant-column system. The effective consolidation pressures were established within a range between 50 - 300 kPa and the torsional excitations were equal to 0.025, 0.05, 0.1, 0.2, 0.4 and 0.8 V. It was found that such test combinations lead to angular deformations between 0.003% and 0.148%. The results indicate that it is possible to establish simple empirical functions of the stiffness module as a function of the angular deformation and the effective consolidation pressure.

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