Research Article
Calculation of Elastic Modulus for Fractured Rock Mass Using Dimensional Analysis Coupled with Numerical Simulation
Table 2
The physical and mechanical parameters of Zhengxing Iron Mine.
| | Physical quantities | Initial value | Final value |
| | Parallel fractures of aperture B (m) | 1 × 10−4∼5 × 10−3 | 1 × 10−5∼1 × 10−1 | | Depth of the goaf H (m) | 120∼320 | 1 × 102∼1 × 103 | | Span of the goaf l (m) | — | 3.0∼160.0 | | Exposed area of the goaf A (m2) | 2.4 × 103∼1 × 104 | 2.4 × 103∼1 × 104 | | Height of the goaf h (m) | 10.0∼50.0 | 10.0∼50.0 | | Parallel fractures of spacing S (m) | 0.05∼10.0 | 1.0 | | Elastic modulus of the rock E (GPa) | 50.0 | 50.0 | | Width of the goaf (m) | 20.0 | 20.0 | | Bulk weight of rock mass γ (kN/m3) | 27.0 | 27.0 | | Gravitational acceleration (m/s2) | 9.8 | 9.8 | | Poisson's ratio υ | 0.25 | 0.25 | | Kinematic viscosity of water (20°C) μk (m2/s) | 1.01 × 10−6 | 1.01 × 10−6 | | Elastic modulus reduction ratio Rm | — | 0.8 |
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