The fractal dimension D and another associated fractal parameter A were calculated for different values of the input parameter of the roughness-length method to determine the fractional Brownian profiles. Suitable ranges for window length w were estimated to produce accurate D for the generated profiles. The use of at least seven w values between the estimated minimum and maximum suitable w values in estimating fractal parameters of a natural rock joint profile is recommended. Calculated cross-over lengths for the profiles investigated were found to be extremely small indicating that laser profilometers are required to make roughness measurements at interval lengths comparable to the cross-over lengths of the natural rock joint profiles.
|Original language||English (US)|
|Number of pages||14|
|Journal||International Journal of Rock Mechanics and Mining Sciences|
|State||Published - 1999|
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology