Large-Deformation Failure Mechanism of Coal-Feeder Chamber and Construction of Wall-Mounted Coal Bunker in Underground Coal Mine with Soft, Swelling Floor Rocks

Table 4

Six different reinforcement schemes and their control effect (unit: mm).

Scheme (no.)	Bolt (diameter × length)	Anchor cable (diameter × length)	Cable interval (spacing × row spacing)	Maximum displacement in coal seam segment
1	Φ20 × 2400	Φ17.8 × 5000	800 × 800	73
2	Φ20 × 2400	Φ17.8 × 5000	1600 × 800	89
3	Φ20 × 3000	Φ17.8 × 6200	800 × 800	36
4	Φ20 × 3000	Φ17.8 × 6200	1600 × 800	47
5	Φ20 × 3600	Φ17.8 × 7300	1600 × 800	32
6	Φ20 × 3600	Φ17.8 × 7300	1600 × 1600	61