Research Article
Dissipation of Impact Stress Waves within the Artificial Blasting Damage Zone in the Surrounding Rocks of Deep Roadway
Table 1
The lithology and mechanical parameters of the roadway roof and floor.
| | Rock strata | Thickness
(m) | Density
(kg·m−3) | Shear modulus (GPa) | Bulk modulus (GPa) | Cohesion
(MPa) | Tensile strength (MPa) | Friction angle
(°) |
| | Fine sandstone | 19.0 | 2740 | 9.43 | 13.64 | 4 | 6 | 36 | | Coarse sandstone | 3.0 | 2520 | 5.41 | 6.65 | 3.33 | 5.4 | 38 | | Coal seam | 5.0 | 1340 | 1.52 | 4.22 | 2.4 | 1.0 | 18 | | Mudstone | 1.0 | 2100 | 25.8 | 11.43 | 13.4 | 5 | 7 | | Fine sandstone | 6.0 | 2740 | 9.43 | 13.64 | 4 | 6 | 36 |
|
|
