Effects of Initial Porosity and Water Pressure on Seepage-Erosion Properties of Water Inrush in Completely Weathered Granite

Table 4

Porosity with time to each sample (partial results).

Number	Water pressure (MPa)	Initial porosity	Time (min)
			0	5	10	20	30	40	50	60	90	120
1	0.2	0.36	0.36	0.36	0.36	0.37	0.37	0.37
2	0.4		0.36	0.36	0.37	0.38	0.38	0.38	0.39	0.39
3	0.6		0.36	0.36	0.37	0.38	0.39	0.41	0.43	0.43	0.44
4	0.6	0.23	0.23	0.23	0.24	0.24	0.25	0.25	0.25	0.25	0.26	0.26
5		0.30	0.30	0.31	0.32	0.32	0.33	0.33	0.34	0.34	0.36	0.36
6		0.36	0.36	0.36	0.37	0.38	0.39	0.41	0.43	0.43	0.44