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Fundamental and applied issues of mining

2019 year, number 2

METHOD FOR DETERMINING ROCK TENSILE STRENGTH AND FRACTURE RESISTANCE USING THE RESULTS OF TESTING DISC-SHAPED HOLLOW SAMPLES

V. P. Efimov
Chinakal Institute of Mining, Siberian Branch Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Растяжение, "бразильский метод", разрушение, прочность, трещиностойкость, интегральный критерий прочности, Tension, "Brazilian method", failure, strength, fracture resistance, integral strength criterion

Abstract

A method for determining the strength characteristics of rocks under tensile conditions has been tested. It is based on testing samples with axial holes of different diameters loaded diametrically. The test results of rock samples and simulating media in the form of hollow cores broken diametrically are presented. The test results were processed using gradient and integral strength criteria. The values of fracture resistance and tensile strength obtained on the basis of this approach are compared with those measured in a standard way.