Scheme | Top bolt | Side bolt | Top anchor rope |
Scheme 1 | 0 | 0 | 0 |
Scheme 2 | 6Φ20 × L2000 mm rebar bolt, row spacing 800 × 1000 mm | 3Φ20 × L2000 mm rebar bolt, row spacing 1200 × 1000 mm | 3Φ21.8 × L5300 mm anchor rope, row spacing 1600 × 1000 mm |
Scheme 3 | 6Φ20 × L2200 mm rebar bolt, row spacing 800 × 1000 mm | 3Φ20 × L2200 mm rebar bolt, row spacing 1200 × 1000 mm | 3Φ21.8 × L6300 mm anchor rope, row spacing 1600 × 1000 mm |
Scheme 4 | 6Φ20 × L2400 mm rebar bolt, row spacing 800 × 1000 mm | 3Φ20 × L2400 mm rebar bolt, row spacing 1200 × 1000 mm | 4Φ21.8 × L7300 mm anchor rope, row spacing 1200 × 1000 mm |