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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 ...

The crack propagation researches carried out on rock and rock mass are important in mining, petroleum and natural gas engineering studies. It is assumed that crack propagation is an important design parameter in underground and open-pit mining applications. It has positive effects in some mining activities such as drilling, blasting, excavating, block caving but also negative effects due to cracks formed around mine roadways, tunnels and in landslides. In this research, the marble and travertine were selected as n...

The uniaxial compressive strength (UCS) of rocks is an important parameter used in rock mechanics studies. The standard test procedures in order to determine UCS value has been developed by ISRM and ASTM. According to these standards, the tests should be carried out on core samples but they say that the tests should be also being carried out on cube samples. There are a lot of papers published about the size effect of intact core samples. According to the articles and standards, the length (l) - diameter (d) ratio...