Research Article
Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well
| Diameter of the bar (mm) | Length of the input bar (mm) | Length of the output bar (mm) | Elastic modulus (GPa) | Longitudinal wave velocity | Poisson ratio | Pressure (MPa) | Density (kg·m−3) |
| 75 | 2000 | 2000 | 250 | 5400 | 0.285 | 0∼10 | 7810 |
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