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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: New Challenges In Rock Mechanics And Rock Engineering, Eurock 2024 Título del capítulo: Estimating static elastic properties of a volcanic sequence in the Valley of Queretaro (VQ)
A series of laboratory tests have been performed to assess the effects of progressive deformation on the elasticity and compressive strength of the VQ rock sequence. Specimens of basalts and pyroclastic rocks were obtained from twelve boreholes drilled with depths between 40 and 160 m. UCS tests were performed on a highly stiff and fatigue-rated load frame model MTS 815. Specimens were subjected to increasing-amplitude cyclic loading experiments. Changes in the elastic properties were observed in both sedimentary and volcanic rock types as the rock approached the rupture. A significant difference in strength was obtained, with UCS values ranging between 13.5 and 23.97 GPa for the basalt, and between 0.96 and 1.27 GPa for the pyroclastic sequence. Our results suggest that the differences in stress failure may explain the debilitating nature of the contacts between basalts and pyroclastic rocks that might explain ground ruptures.
