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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/tc-2020-18
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2020-18
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: brief communication 14 Feb 2020

Submitted as: brief communication | 14 Feb 2020

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This preprint is currently under review for the journal TC.

Brief communication: The influence of mica-rich rocks on the shearstrength of ice-filled discontinuities

Philipp Mamot, Samuel Weber, Maximilian Lanz, and Michael Krautblatter Philipp Mamot et al.
  • Chair of Landslide Research, Technical University of Munich, Munich, Germany

Abstract. A temperature- and stress-dependent failure criterion for ice-filled rock (limestone) joints was proposed in 2018 as an essential tool to assess and model the stability of degrading permafrost rock slopes. To test the applicability to other rocks, we now conducted experiments with mica schist/gneiss which provide the maximum expected deviation of lithological effects on the shear strength due to strong negative surface charges affecting the rock-ice interface. Retesting 120 samples from −10 to −0.5 °C and 100 to 400 kPa, we show that even for controversial rocks the failure criterion stays unaltered, suggesting that the failure criterion is transferable to mostly all rock types.

Philipp Mamot et al.

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Philipp Mamot et al.

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Latest update: 05 Apr 2020
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Short summary
A failure criterion for ice-filled rock joints is a prerequisite to accurately assess the stability of permafrost rock slopes. In 2018 a failure criterion was proposed which based on limestone. Now, we tested the transferability to other rocks using mica schist/gneiss which provide the maximum expected deviation of lithological effects on the shear strength. We show that even for controversial rocks the failure criterion stays unaltered, suggesting that it is applicable to mostly all rock types.
A failure criterion for ice-filled rock joints is a prerequisite to accurately assess the...
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