A Method for Estimating the Surface Roughness of Rock Discontinuities

Table 1

values for different values of D for typical profiles.

JRC	( mm)				( mm)
			Average				Average
0.4	0.4068	0.3771	0.3920		0.3195	0.3001	0.3098
2.8	0.4611	0.3855	0.4233		0.4414	0.3468	0.3941
5.8	0.5069	0.4406	0.4737		0.4474	0.3966	0.4220
6.7	0.6041	0.6253	0.6147		0.6035	0.6144	0.6089
9.5	0.7034	0.5507	0.6271		0.6641	0.5112	0.5877
10.8	0.6364	0.6797	0.6580		0.6195	0.6497	0.6346
12.8	0.8196	0.7106	0.7651		0.7629	0.6876	0.7253
14.5	0.7879	0.8039	0.7959		0.7614	0.7742	0.7678
16.7	1.0236	0.8319	0.9277		0.9640	0.7612	0.8626
18.7	1.0718	1.1521	1.1119		1.0596	1.1075	1.0836

and represent the values with respect to the shear directions along the positive and negative x-axis, respectively.