Evaluation of Rock Mechanical Parameters - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 601

Table 18.17 Chalk, limestone, Haifa (Israel)
Rock mass

Elastic constants Strength of intact rock Strength of discontinuities Permeability References

E = 3000 MPa
ν

σ cIR = 10 MPa φ B = 30°

c B = 0.1 MPa
φ J = 35°
c J = 1 MPa

— • Wittke et al. (2007)

= 0.25

Table 18.18 Clay slate (Hunsrückschiefer) near Rüdesheim (Germany)
Rock mass

Elastic constants Strength of intact rock Strength of discontinuities Permeability References

k = 10 -6 - 10 -4 m/s
(depending on depth)

E 1 = 8000 - 12,000 MPa
E 2 = 1500 - 2500 MPa
G 2 = 1000 - 1500 MPa
ν 1 = 0.2 - 0.3
ν 2 = 0.02 - 0.1

φ IR = 30 - 40°
c IR = 10 - 15 MPa

φ Sch = 25 - 35°
c ScH = 0.1 - 0.5 MPa
φ D1/D2 = 30°
c D1/D2 = 4 MPa

• Wittke & Schetelig (1978)

• Wittke (1990)