Evaluation of Water Retention Capacity of Bulkheads in Underground Coal Mines

Table 1

Design parameters of water retention bulkhead.

	Length of wall (m)				Design water pressure on walls (MPa)	Strength of concrete
	Total length	Main wall	Internal reinforcement section	External reinforcement section		Design standard	Construction standard
Transport roadway	64	24	30	10	8.32	C25	C28
Material roadway	64	24	30	10	8.00	C25	C28