Ring-shear test data of quartz sand used for analogue experiments in the laboratory of the Institute of Geophysics of the Czech Academy of Science, Prague

This dataset provides friction data from ring-shear tests (RST) for a quartz sand used in analogue experiments at the Institute of Geophysics of the Czech Academy of Science (IGCAS) (Kratinová et al., 2006; Zavada et al., 2009; Lehmann et al., 2017; Krýza et al., 2019). It is characterized by means of internal friction coefficients µ and cohesion C. According to our analysis the materials show a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak friction coefficients µP of the tested material is ~0.75, dynamic friction coeffi-cients µD is ~0.60 and reactivation friction coefficients µR is ~0.64. Cohesions of the material range between 90 and 130 Pa. The material shows a minor rate-weakening of <1% per ten-fold change in shear velocity v.

本数据集提供捷克科学院地球物理研究所（Institute of Geophysics of the Czech Academy of Science, IGCAS）用于相似模拟实验的石英砂的环剪试验（ring-shear tests, RST）摩擦数据（Kratinová等，2006；Zavada等，2009；Lehmann等，2017；Krýza等，2019）。该数据集通过内摩擦系数μ与黏聚力C对材料特性进行表征。经分析，受试材料表现出莫尔-库仑（Mohr-Coulomb）破坏特性，其破坏包络线呈线性分布。受试材料的峰值摩擦系数μ_P约为0.75，动摩擦系数μ_D约为0.60，再活化摩擦系数μ_R约为0.64。该材料的黏聚力取值范围为90 Pa至130 Pa。此外，该材料表现出微弱的速率弱化效应：剪切速度v每变化10倍，摩擦系数的衰减幅度小于1%。