Bagazeev V. K., Valiev N. G., Startsev V. A. – The Ural State Mining University, Ekaterinburg, the Russian Federation. Е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

The article describes the investigation directed to determine strength characteristics of loamy rock of placer gold field
“Kliuchi”. In the course of work with the use of the common method of ultimate shear strength, bond index and internal
friction index have been determined. With the calculation method, tensile strength in uniaxial compression has been
determined. Simultaneously, the calculation of fineness ratio and plasticity index were carried out, the indices of which
were used to determine bond and internal friction index with “Dal’NIIS” method. At the same time, with the account of
thorough preparation of models, experiments over the determination of tensile strength of loamy rock in uniaxial
compression have been carried out. Comparative analysis of the enumerated methods over the determination of strength
characteristics has shown insignificant divergence in the acquired data.

Key words: physical and mechanical properties; tensile strength in uniaxial compression; ultimate shear strength; loamy rock; stability.

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