Abbreviations
- A 0 :
-
Normalized area corresponding to apparent dip angle \(\theta_{\hbox{max} }^{*} = 0\)
- a :
-
Coefficient
- b :
-
Coefficient
- C :
-
Roughness parameter characterizing distribution of apparent dip angles over joint surface
- c t :
-
Apparent cohesion (MPa)
- d n :
-
Dilatancy angle (°)
- f():
-
General function
- JCS:
-
Joint wall compressive strength (MPa)
- JRC:
-
Joint roughness coefficient
- i :
-
Positive integer, i = 1, 2,…, N
- l :
-
Sampling interval (mm)
- m :
-
Sampling effect coefficient
- R :
-
Rebound of the Schmidt hammer on unweathered joint surface
- r :
-
Rebound of the Schmidt hammer on weathered joint surface
- s n :
-
Sheared component (°)
- \(\theta_{\hbox{max} }^{*}\) :
-
Maximum apparent dip angle along the shear direction (°)
- β :
-
Angle between schistosity plane and plane normal to the joint (°)
- φ a :
-
Additional strength component (°)
- φ b :
-
Basic friction angle (°)
- φ p :
-
Peak friction angle (°)
- φ r :
-
Residual friction angle (°)
- φ t :
-
Tangent angle (°)
- τ p :
-
Peak shear strength of rough rock joint (MPa)
- τ p_cal :
-
Calculated peak shear strength by criterion (MPa)
- τ p_mea :
-
Measured peak shear strength (MPa)
- e ave :
-
Average error of estimation
- σ c :
-
Uniaxial compressive strength (MPa)
- σ n :
-
Normal stress (MPa)
- σ t :
-
Tensile strength (MPa)
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Acknowledgments
The first author acknowledges the support from the Natural Science Foundation of China under Projects 41402247 and 51504166. The first and second authors acknowledge the support from the Natural Science Foundation of China under Project 51479191 and the National Basic Research Program of China (973 Program) under Project 2014CB046904. The third author acknowledges the support from the Seed Funding Programme for Basic Research for New Staff at the University of Hong Kong.
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Tang, Z.C., Jiao, Y.Y., Wong, L.N.Y. et al. Choosing Appropriate Parameters for Developing Empirical Shear Strength Criterion of Rock Joint: Review and New Insights. Rock Mech Rock Eng 49, 4479–4490 (2016). https://doi.org/10.1007/s00603-016-1014-0
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DOI: https://doi.org/10.1007/s00603-016-1014-0