Left slope wall | 1.75–2.0 | 1.75–2.0 |
1.5–1.75 |
1.75–2.0 |
Right slope wall | >2.5 | >2.5 |
>2.5 |
2.0–2.25 |
Mudstone | 2.31 | 1.54 | 1.87 | 30 | 1.34 | 2620 |
Claystone | 2.23 | 1.34 | 2.05 | 26 | 1.14 | 2600 |
Anthracite | 2.17 | 1.36 | 2.14 | 27 | 1.22 | 1500 |
Conglomerate | 4.76 | 3.57 | 3.23 | 28 | 2.27 | 2510 |
Sandstone | 3.91 | 2.46 | 3.56 | 28 | 1.96 | 2600 |
Value | 12–20 | 3.4–4.4 | 0 |
Peng and Chiang, 1984 [ |
(2–10) |
Bai et al., 1995 [ |
100 |
Mazurkiewicz et al., 1997 [ |
|
Heasley, 2004 [ |
(10–18) |
Biliński, 2005 (simplified) [ |
( |
Wang et al., 2017 [ |
(3–4) |