Identification of Hydraulic Connection Points between Different Confined Aquifers in the Liyazhuang Coal Mine

Table 1

Variation in the water level of Ordovician limestone before water inrush as a function of distance.

Name	Hole number	Aquifer	Distance from water inrush point (m)	Water level value before water inrush(m)
Fengfeng Formation	LK2	O2f	3727	495.84
	LK4	O2f	2921	484.89
	LK5	O2f	1874	492.62
	LK6	O2f	3564	495.67
	LK7	O2f	5090	513.75
	LK8	O2f	2916	484.37
	LK11	O2f	2047	493.71
	LK12	O2f	3281	481.93
Majiagou Formation	LK10	O2s	899	516.20
	SL-2	O2s	6391	510.94
	SL-4	O2s	6908	514.83