Effects of Porosity of Dry and Saturated Sandstone on the Energy Dissipation of Stress Wave

Table 2

Statistics on porosity and energy.

	No.	Porosity (%)	Reflected wave energy ratio (Wr/Wi) (%)	Transmitted wave energy ratio (Wt/Wi) (%)	Energy dissipation ratio (Wd/Wi) (%)
Dry sandstone	70	4.59	60.54	18.22	21.24
	92	5.59	59.34	14.42	26.24
	86	6.13	49.04	19.63	31.33
	80	6.26	47.71	27.32	24.97
	24	6.67	72.17	9.21	18.63
	95	7.51	56.41	14.41	29.18
	67	8.36	64.75	11.64	23.61
	98	8.57	60.16	14.68	25.16
	94	9.30	58.27	13.65	28.08
Saturated sandstone	64	6.57	78.25	6.62	15.13
	61	7.72	76.03	8.87	15.10
	39	7.97	73.81	8.03	18.17
	53	8.18	62.43	21.16	16.41
	59	8.32	81.70	5.30	13.00
	60	8.49	74.01	10.31	15.69
	36	8.66	80.45	6.10	13.45
	55	8.90	77.07	8.22	14.72
	54	9.58	77.32	10.09	12.59