Evaluation Method of Water Hazard Control Effect of Coal Seam Floor in Deep Mining: Sequence Verification Evaluation

Table 3

Water pressure test data after grouting transformation of Xujiazhuang limestone aquifer.

No.	Hydraulic pressure (MPa)	Time (min)	Regime flow (L/min)	Drilling radius (m)	Test length (m)
D-1	6	30	39	0.075	25.69
D-2	6	30	28	0.075	35.4
D-3	7	30	35	0.075	36.98
D-4	7	30	52	0.075	38.54