Basic mechanical characteristics of some iron ores of Krivoy Rog and their enclosing quartzites

Abstract

This experimental work was undertaken to determine the basic mechanical characteristics of iron ores and the enclosing quartzites of the Leninskii (formerly Kolachevskii) mine in the Krivoy Rog region. The experiments made it possible to establish: 1) Independence of the forms of destruction of rock cubes solely from the nature of the linings. 2) Delay of compressive deformation at high loads. 3) Almost complete proportionality between elastic deformation and stresses for most samples at specific loads above 50-150 kg/cm and some violation of this rigor at lower loads, which is generally consistent with the above-mentioned conclusions of E. E. Woo. 4) Establish the constancy of Poisson's ratio with increasing load and determine its value for iron ore and quartzite using a special modification of the Martens mirror device. 5) Note the excess of the remaining transverse deformations over the elastic ones and the excess of the elastic ones over the remaining ones in the compression direction.