Research Article
The Mechanism and Application of Deep-Hole Precracking Blasting on Rockburst Prevention
Table 4
The physical and mechanics properties of rock layers in numerical simulation.
| | Rock layers | /m | /kg·m−3 | /MPa | /° | /GPa | /GPa | /MPa |
| | Roof sandstone | 40 | 2550 | 17 | 35 | 12 | 11 | 4.9 | | Roof mudstone | 20 | 2700 | 13.5 | 29.2 | 8.2 | 7.8 | 2.6 | | Coal seam | 10 | 1400 | 9 | 26.9 | 1.7 | 1.5 | 0.8 | | Backplane mudstone | 4 | 2500 | 13.8 | 29.5 | 12.8 | 10 | 4.6 | | Backplane sandstone | 26 | 2500 | 16.4 | 30.8 | 12.1 | 11.9 | 5.2 |
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