Correlation between the Joint Roughness Coefficient and Rock Joint Statistical Parameters at Different Sampling Intervals

Table 2

Fitting results of the six models.

Model	Δx (mm)	A	b	R
JRC = a + b	0.1	−21.78	64.47	0.980
	0.2	−19.91	62.42	0.981
	0.5	−17.53	59.85	0.986
	1	−15.10	57.74	0.984
JRC = a + b lg(Z2)	0.1	32.60	36.02	0.973
	0.2	32.00	33.63	0.974
	0.5	30.74	29.91	0.970
	1	29.72	26.42	0.963
JRC = a + b(Z2)	0.1	−6.11	64.31	0.962
	0.2	−5.27	64.29	0.964
	0.5	−4.43	64.31	0.974
	1	−3.51	68.17	0.975
JRC = a + b tan(Z2)	0.1	−5.31	59.36	0.964
	0.2	−5.31	59.36	0.961
	0.5	−5.31	59.36	0.971
	1	−3.16	65.09	0.974
JRC = a + b tan^−1(Z2)	0.1	24.66	−3.31	0.813
	0.2	23.55	−2.84	0.838
	0.5	21.11	−2.08	0.843
	1	19.11	−1.47	0.885
JRC = a + b(Z2)^c	0.1	1.85	116.42	0.862
	0.2	2.18	122.66	0.835
	0.5	2.35	134.41	0.844
	1	2.54	162.41	0.826