Experimental Study on Stress Wave Propagation Crossing the Jointed Specimen with Different JRCs

Table 3

The parameters of stress-closure curve fitting equations.

	S1	S2	S3	S4	S5	S6	S7	S8	S9	S10
kni (GPa/m)	89.832	99.377	104.49	114.30	121.72	122.04	127.62	138.39	140.71	148.54
	0.168	0.162	0.157	0.154	0.151	0.147	0.139	0.131	0.135	0.128
R^2	0.9987	0.9985	0.9983	0.9982	0.9981	0.9978	0.997	0.9965	0.9972	0.9964