Research Article
The Influence Mechanism of the Master Weak Interlayer on Bench Blasting Effect and Its Evaluation Method
Table 9
Evaluation calculation of the master weak interlayer.
| | Rock stratum number | Longitudinal wave velocity, Ci (m/s) | Density, ρi (kg/m3) | Wave impedance, Ri (kg/m2·s) | Thickness, Di (m) | Wave impedance, Zi (thickness) | Ration ranking, | Master weak interlayer evaluation |
| | ① | 2660 | 2480 | 6596800 | 5 | — | — | | | ② | 1322 | 1350 | 1784700 | 1.5 | 1189800 | 1 | Master weak interlayer | | ③ | 2668 | 2372 | 6328496 | 1.5 | 4218997 | 4 | | | ④ | 1360 | 1530 | 2080800 | 0.5 | 4161600 | 2 | A secondary master weak interlayer | | ⑤ | 2663 | 2377 | 6329951 | 1.5 | 4219967 | 3 | |
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