TY - JOUR
T1 - Brief communication
T2 - The influence of mica-rich rocks on the shear strength of ice-filled discontinuities
AU - Mamot, Philipp
AU - Weber, Samuel
AU - Lanz, Maximilian
AU - Krautblatter, Michael
N1 - Publisher Copyright:
© 2020 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.
PY - 2020/6/10
Y1 - 2020/6/10
N2 - 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 rock types, we conducted laboratory tests with mica schist and 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 at temperatures from - 10 to -0:5 °C and normal stress of 100 to 400kPa, we show that even for controversial rocks the failure criterion stays unaltered, suggesting that the failure criterion is transferable to mostly all rock types.
AB - 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 rock types, we conducted laboratory tests with mica schist and 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 at temperatures from - 10 to -0:5 °C and normal stress of 100 to 400kPa, we show that even for controversial rocks the failure criterion stays unaltered, suggesting that the failure criterion is transferable to mostly all rock types.
UR - http://www.scopus.com/inward/record.url?scp=85087983528&partnerID=8YFLogxK
U2 - 10.5194/tc-14-1849-2020
DO - 10.5194/tc-14-1849-2020
M3 - Article
AN - SCOPUS:85087983528
SN - 1994-0416
VL - 14
SP - 1849
EP - 1855
JO - Cryosphere
JF - Cryosphere
IS - 6
ER -