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Ambiguities in estimating fractal dimensions of rock fracture surfaces.

Authors
Miller-SM; McWilliams-PC; Kerkering-JC
Source
Rock Mechanics: Contributions and Challenges: Proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado. Hustrulid WA, Johnson GA, eds., Brookfield, VT: A.A. Balkema, 1990 Jan; :471-478
Link
NIOSHTIC No.
10008203
Abstract
U.S. Bureau of Mines analyses of rock fracture roughness profiles from three different rock types have provided ambiguous results when fractal dimensions are estimated using self-affine fractal models. Variabilities in natural fracture surfaces cause estimated fractal dimensions to be significantly different even for adjacent, parallel profiles. Fractal dimensions calculated by any of four methods (divider, modified divider, box, and spectral methods) are sensitive to arbitrarily selected input parameters, and results from the four methods rarely agree with one another. Furthermore, visual assessments of profiles suggest that rock fracture roughness cannot be described consistently by fractal dimension alone.
Keywords
Rock-mechanics; Geology; Coal-mining; Underground-mining; Structural-analysis; Surface-mining; Surface-properties; Analytical-models; Ground-stability
Publication Date
19900101
Document Type
OP; Conference/Symposia Proceedings
Editors
Hustrulid-WA; Johnson-GA
Fiscal Year
1990
NTIS Accession No.
NTIS Price
ISBN No.
9789061911234
Identifying No.
OP-162-90
NIOSH Division
SRC
Source Name
Rock Mechanics: Contributions and Challenges: Proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado
State
WA; CO; ID
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