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V. A. Korshunov
V. A. Korshunov
Saint Petersburg State Mining Institute (Technical University)
Saint Petersburg State Mining Institute (Technical University)
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Articles

Geomechanics
  • Date submitted
    2016-12-05
  • Date published
    2011-02-01

A new technique for the determination of ultimate strength in extention of rocks

A new technique has been developed for the determination of ultimate strength in uniaxial extension by testing results of samples of arbitrary shape. This technique consists in the sample failure with spherical indentors and measuring of sizes of rupture surfaces and zones of failured rocks at contacts with indentors for the subsequent estimation of ultimate stress state. The revised formulas were obtained for calculation of ultimate strength in uniaxial extension with using the method of sample failure with spherical indentors, essentially improving the accuracy of the technique.

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V. A. Korshunov, Yu. M. Kartashov (2011) A new technique for the determination of ultimate strength in extention of rocks. Journal of Mining Institute. Vol 190. p. 202.
Mining
  • Date submitted
    2019-05-07
  • Date published
    2019-10-27

Estimation of Rock Mass Strength in Open-Pit Mining

The paper presents results of an experimental study on strength characteristics of the rock mass as applied to   the assessment of open-pit slope stability. Formulas have been obtained that describe a correlation between ultimate and residual strength of rock samples and residual shear strength along the weakening surface. A new method has been developed to calculate residual interface strength of the rock mass basing on data from the examination of small-scale monolith samples with opposing spherical indentors. A method has been proposed to estimate strength characteristics (structural weakening coefficients and internal friction angles) of the fractured near-slope rock mass. The method relies on test data from shattering small-scale monolith samples with spherical indentors, taking into ac- count contact conditions along the weakening surface, and can be applied in the field conditions. It is acceptable to use irregular-shaped samples in thetests.

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A. A. Pavlovich, V. A. Korshunov, A. A. Bazhukov, N. Ya. Melnikov (2019) Estimation of Rock Mass Strength in Open-Pit Mining. Journal of Mining Institute. Vol 239. p. 502. DOI: 10.31897/pmi.2019.5.502