Scholarly record
DETERMINING THE RELATIONS BETWEEN MECHANICAL AND ELECTRICAL CHARACTERIZATION OF ROCKS
Abstract
Determination of mechanical parameters of rock materials and using them as an input data-base are important in rock engineering design studies. The standard test procedures to determine mechanical parameters of rocks have been developed and they have been applied for up to 40 years. But these tests require special samples and after preparation, the samples are tested by giving damage to them. The electrical conductivity method has been used to determine porosity, fault or discontinuity in rock mass without giving damage, especially in underground gas, water or petroleum storage excavations or excavations opened for waste dumping studies. In this study, an alternative nondestructive measuring technique developed in order to predict mechanical properties of rocks was presented. The electrical conductivity and mechanical properties of rock materials were analyzed in order to research whether there are relationships between mechanical and electrical behaviors. Tests samples were prepared taking cores from eight different rock blocks. The tests in laboratory were carried out in two different stages: the first was electrical conductivity and the second was mechanical tests. Electrical potential difference (EPD) values of 30 samples were measured. In addition, the uniaxial compressive strength, indirect tensile strength, uniaxial deformability, point load strength, Schmidt hammer, density and porosity tests on 30 samples were carried out in laboratory. As a result, strong relationships were found between electrical conductivity and mechanical properties.
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References18
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