Efectos de la petrografía en las propiedades geomecánicas de rocas volcánicas en el Ecuador

Abstract

Abstract: Variations in the mechanical properties of rocks are associated with changes in their physical properties. The mineralogy, fracturing, degree of porosity, texture and mineral structure are some of the physical properties of the rocks that can considerably alter the mechanical properties. This research aims to determine the degree of influence of petrography on the geomechanical properties for different volcanic rocks in Ecuador. The petrographic analysis of thin sections, geochemical and quantitative analysis of the minerals present in the rock by means of fluorescence and X-ray diffraction, stress and deformation of the rock specimens with the application of uniaxial compression tests and the speed of propagation of sonic waves were tools used in this work. The study was able to establish 6 lithotypes for the volcanic rocks studied, which were RMPF, DMPF, AMPF, AMPM, BAMPM and BMPM. The results obtained show that density, sclerometer strength and uniaxial compressive strength are parameters that are directly related to geochemistry, phenocryst content and mineral percentages contained in each lithotype. Not in this way, where the speed that seems to be much more related to properties such as porosity and humidity.