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http://dx.doi.org/10.9720/kseg.2017.4.463

Quantification of Heterogenous Background Fractures in Bedrocks of Gyeongju LILW Disposal Site  

Cho, Hyunjin (R&D Institute, Korea Radioactive Waste Agency)
Cheong, Jae-Yeol (R&D Institute, Korea Radioactive Waste Agency)
Lim, Doo-hyun (FracMan Technology Group, Golder Associates Inc.)
Hamm, Se-Yeong (Dept. of Geological Sciences, Pusan National University)
Publication Information
The Journal of Engineering Geology / v.27, no.4, 2017 , pp. 463-474 More about this Journal
Abstract
Heterogeneous background fractures of granite and sedimentary rocks in Gyeongju LILW (low-intermediate level radioactive waste) facility area have been characterized quantitatively by analyzing fracture parameters (orientation, intensity, and size). Surface geological survey, electrical resistivity survey, and acoustic televiewer log data were used to characterize the heterogeneity of background fractures. Bootstrap method was applied to represent spatial anisotropy of variably oriented background fractures in the study area. As a result, the fracture intensity was correlated to the inverse distance from the faults weighted by nearest fault size and the mean value of electrical resistivity and the average volumetric fracture intensity ($P_{32}$) was estimated as $3.1m^2/m^3$. Size (or equivalent radius) of the background fractures ranged from 1.5 m to 86 m and followed to power-law distribution based on the fractal property of fracture size, using fractures measured on underground silos and identified surface faults.
Keywords
Background fracture; fracture orientation; fracture intensity; fracture size; fractal;
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Times Cited By KSCI : 1  (Citation Analysis)
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