Research Article
Evaluation of Water Retention Capacity of Bulkheads in Underground Coal Mines
Table 3
Connectivity coefficients of water conducting pathway at the interface between bulkhead and surrounding rock of Panel No. 21102.
| | Connectivity coefficient of water conducting pathway m | Type of bulkhead | Length of main wall (m) | Length of reinforcement section on both sides (m) | LD/L | Pg/Pd | Stability time of pressure test |
| | 8–10 | Inverted pyramid | 24 | 40 | 1.19 | 1.12 (TR) | 24–72 | | 8–10 | Inverted pyramid | 24 | 40 | 1.19 | 1.25 (MR) | 24–72 |
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TR represents transport roadway and MR represents material roadway.
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