Table 3 Comprehensive calculation parameter table for stability of coal pillar.
Coal | Mining depth (m) | Mining height (m) | Reserved width (m) | Mining width (m) | Safety factor | Width of coal pillar yield zone (m) | Ratio of width to height (%) | Core area ratio of coal pillar (%) | Recovery rate (%) |
|---|---|---|---|---|---|---|---|---|---|
5# | 440.00 | 8.00 | 75.00 | 55.00 | 1.85 | 7.54 | 9.38 | 79.90 | 42.30 |
