Two-dimensional non-linear dynamic response of a heap leach pad located in Peru

© 2016 Australian Geomechanics Society. In this research a dynamic characterization in function of mean stress of share wave velocities and his corresponding maximum shear modulus (Vs, Gmax) of ROM (run of mine) ore stacking were carried out based on MASW survey. In addition a triaxial compression tests (consolidated undrained, CU of 6″ diameter) have been carried out to determine the mechanical properties of the ROM ore stacking of sandstone crushed material. The study has focused on the understanding of the two-dimensional non-linear dynamic response of a heap leach pad located in a higher seismicity Andean region of Peru. This geostructure modeled in Finite Differences Method software (FLAC, Itasca) was subjected to an Operating Basis Earthquake (OBE) obtained from a spectral matching in the time domain (Abrahamson, 1993). A constitutive Mohr-Coulomb Model with stress-level dependent is used to simulate the stress-strain behavior of the ore material. The slope stability and the permanent deformations at the end of this excitation are evaluated. As well as, the development of the deformations during the earthquake are present here in.