Research Article
Numerical and Preliminary In Situ Investigation on Roadway Excavation Using Static Expansion Mechanical Fracturing
Table 2
Fracturing performance of single hole.
| | Scenario | Fracture penetrability | Fracture shape | Fragment area (m2) | Max. splitting force (MN) |
| | S1 (X = 0.25 m) | Yes | Triangle | 0.125 | 3.4 | | S2 (X = 0.5 m) | Yes | Triangle | 0.5 | 8.2 | | S3 (X = 1.0 m) | Yes | Trapezoid | 1.875 | 22 | | S4 (X = 1.5 m) | Yes | Square | 2.25 | 18 | | S5 (X = 2.0 m) | No | Rectangle | 2.47 | 32 |
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