Evaluation of Rock Mechanical Parameters - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 605

Table 18.24 Unleached Gypsum Keuper, Stuttgart (Germany)
Rock mass

Elastic constants and swel-
ling parameters

Strength and water uptake
parameters of intact rock

Strength of discontinuities Permeability References

k = 10 -10 - 10 -6 m/s E = 2000 - 6000 MPa

ν

σ cIR = 5 - 30 MPa
D W = 2 · 10 -12 m²/s
S W = 0.1 - 0.25

φ B = 30°
c B = 0 - 0.2 MPa
φ J = 35°
c J = 0.1 - 0.6 MPa

• Wahlen (2009)

= 0.25
K q = 0.1 - 0.2
σ q0 (

• Wahlen & Wittke (2009)

• Wittke & Wittke-Gatter-

mann (2010)

ω = 1) = 8 - 10 MPa

• WBI (2004)