Influencia de las propiedades petrográficas en la geomecánica de las rocas volcánicas, zona norte de Ecuador.

Abstract

The purpose of this study is to establish the degree of influence of petrographic properties on the geomechanics of volcanic rocks taken in the northern part of Ecuador, Papallacta, geologically located on the eastern flank of the Cordillera Real, for which field work was carried out. Followed by a macroscopic characterization (type of rock, degree of weathering and fracturing), collection of samples of at least 20 cm x 20 cm with the following characteristics: rock free of weathering, unfractured rocks and with low or no porosity for the preparation of thin sheets where the microscopic analysis was carried out (classification of the rock based on ternary diagrams, microtexture, texture, size, shape of the minerals, porosity and degree of weathering), finally carried out the analysis of stress and deformation tests using uniaxial compression.

By determining this influence, a mechanical behavior model could be established, resulting in the petrographic properties and classifying the rock according to 8 types of volcanic rocks according to their APMP, AMMM, YYMM, LMPF, AMPS, BXMC, AMPF and AMMB. The results obtained show that the resistance to simple compression and the resistance by Schmidt hammer are directly related to the content of phenocrysts, texture and porosity of each lithotype.