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Evolution of stress-strain state in structured rock specimens under uniaxial loading

  • Geomechanics
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Journal of Mining Science Aims and scope

Abstract

The comprehensive experimental studies into the change in the stress-strain state of rock specimens subjected to uniaxial loading until failure, using the automated digital speckle photography analysis shows that when the stress reaches 50% of the limit strength of the specimens, low-frequency micro-deformation processes begin in the specimens under slow (quasi-static) stiff loading. The amplitude of the deformation-wave processes depends on the level of the pre-set macro-loading. Wave packets are plotted for averaged microstrains obtained in sandstone and marble specimens under uniaxial compression. Fourier transforms are used to define the amplitude-frequency characteristics of four micro-deformation stages: elastic, nonlinearly elastic, post-peak and residual strength stages. Elastic oscillations with frequency 0.5–4 Hz appear at the pre-failure stage and continue at the post-peak loading stage.

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Authors and Affiliations

  1. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091, Russia

    V. N. Oparin, O. M. Usol’tseva, V. N. Semenov & P. A. Tsoi

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  1. V. N. Oparin
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  2. O. M. Usol’tseva
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  3. V. N. Semenov
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  4. P. A. Tsoi
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Original Russian Text © V.N. Oparin, O.M. Usol’tseva, V.N. Semenov, P.A. Tsoi, 2013, published in Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2013, No. 5, pp. 3–19.

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Oparin, V.N., Usol’tseva, O.M., Semenov, V.N. et al. Evolution of stress-strain state in structured rock specimens under uniaxial loading. J Min Sci 49, 677–690 (2013). https://doi.org/10.1134/S1062739149050018

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  • DOI: https://doi.org/10.1134/S1062739149050018

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