Research Article
Evolution of Characteristics of the Zone of Rock Loosening with Cross-Sectional Area
Table 2
The range of the zone of rock loosening.
| | Cross-sectional area/m2 | Apex angle of roadway/m | Roadsides/m | Bottom angle of roadway/m |
| | 15 | 5.6 | 2.5 | 6.7 | | 20 | 6.3 | 3.0 | 6.8 | | 25 | 7.4 | 3.5 | 7.5 | | 30 | 7.8 | 4.0 | 7.5 |
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