A Method for Estimating the Surface Roughness of Rock Discontinuities

Table 4

variation rate for in different directions.

Direction (°)	δ (%)
0	14.80
15	14.11
30	11.38
45	10.94
60	11.28
75	12.44
90	12.74
105	13.58
120	15.76
135	17.38
150	19.24
165	22.28
180	17.17
195	17.68
210	20.21
225	19.76
240	18.08
255	15.25
270	15.11
285	14.87
300	12.81
315	12.86
330	12.38
345	12.39