Research Article
Research on Key Technologies of Floor Heave Control in Soft Rock Roadway
Table 3
Support parameters of TCRWW.
| | Location | Support members | Support parameters | | Spacing between rows (mm × mm) | Type (mm × mm) | Minimum pretightening force (kN) | Material |
| | Roof | Anchor bolt | 900 × 900 | φ20 × 2200 | 70 | Right-handed rebar without longitudinal bars | | Anchor cable | 1800 × 1800 | φ15.24 × 7000 | 160 | High-strength pretightening low-slack steel strand |
| | Rib | Anchor bolt | 900 × 900 | φ16 × 2000 | 50 | Right-handed rebar without longitudinal bars | | Anchor cable | 1600 × 1600 | φ15.24 × 3000 | 100 | High-strength pretightening low-slack steel strand |
| | Floor | Anchor cable | 1600 × 2000 | φ15.24 × 6000 | 100 | High-strength pretightening low-slack steel strand | | Antifloor arch structure | Quicklime bottom paving + prestressed anchor cable + concrete arc beam + metal mesh + C20 high-strength concrete filling | | | |
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