Table 2 HB calculation parameters and corresponding equivalent MC calculation parameters.

From: Study on the differences between Hoek–Brown parameters and equivalent Mohr–Coulomb parameters in the calculation slope critical acceleration and permanent displacement

H(m)

HB parameter range

1# equivalent c(kPa)

1# equivalent φ(°)

2# equivalent c(kPa)

2# equivalent φ(°)

10

σci(10–30 MPa)

31.31–48.09

32.65–40.38

18.11–23.48

38.95–49.03

GSI(10–30)

18.24–44.9

25.19–38.30

11.66–24.89

29.43–45.74

mi(10–30)

31.34–46.38

32.65–42.49

18.11–22.47

38.95–50.07

D(0–1)

46.15–13.97

41.10–17.63

24.54–10.26

48.44–20.56

20

σci(10–30 MPa)

48.08–73.24

27.91–35.5

32.15–39.24

32.36–42.78

GSI(10–30)

28.24–68.04

21.3–33.19

21.11–42.52

23.86–38.98

mi(10–30)

48.04–72.86

27.91–37.56

32.15–41.55

32.36–43.67

D(0–1)

70.79–20.81

36.2–14.24

42.36–17.66

42.09–15.58

30

σci(10–30 MPa)

61.58–94.01

25.25–32.65

45.08–54.34

28.6–38.95

GSI(10–30)

36.37–86.88

19.19–30.25

29.8–58.98

20.85–34.93

mi(10–30)

61.58–94.65

25.25–34.68

45.08–59.45

28.6–39.8

D(0–1)

91.13–26.19

33.34–12.48

59.27–24.14

38.23–13.09