Research Article
Study on Dynamic Evolution of Roof Crack and Support Timing of Secondary Tunneling for Large Section Open-Off Cut in Deep Mines
Table 3
Comparison of theoretical and simulated values of elastic modulus, compressive strength, and tensile strength of rock mass.
| | Rock strata | E (GPa) | Error (100%) | UCS (MPa) | Error (100%) | BTS (MPa) | Error (100%) | | Target | Calibrated | Target | Calibrated | Target | Calibrated |
| | Sandy mudstone | 3.42 | 3.54 | 3.51 | 8.12 | 8.30 | 2.22 | 0.81 | 0.83 | 2.47 | | Fine sandstone | 5.40 | 5.15 | −4.63 | 10.41 | 10.85 | 4.23 | 1.05 | 0.98 | −6.67 | | Coal | 0.79 | 0.76 | −3.78 | 3.36 | 3.23 | 3.87 | 0.34 | 0.36 | 5.88 |
|
|
