Geometry | Strength | Support | Method |
P. Tabular & Moderately Steep | L. | X. Unsupported | 1. Cut and Fill |
Q. Tabular & Flat | M. Moderate | Y. Artificially Supported | 2. Block Caving |
R. Massive and Steep | N. Weak | Z. -supported | 3. Room and Pillar |
Location | Distance from the blast face, D (m) | PPV (mm/s) |
A | 100 | 112.5 |
B | 300 | 20.3 |