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http://dx.doi.org/10.7474/TUS.2021.31.1.066

Effects of 3-D Fracture Tensor Parameters on Deformability of Fractured Rock Masses  

Ryu, Seongjin (Industry University Cooperation Foundation, Pukyong National University)
Um, Jeong-Gi (Dept. of Energy Resources Engineering, Pukyong National University)
Publication Information
Tunnel and Underground Space / v.31, no.1, 2021 , pp. 66-81 More about this Journal
Abstract
The effects of directional fracture tensor components and first invariant of fracture tensor on deformation moduli and shear moduli of fractured rock masses is analyzed based on regression analysis performed between 3-D fracture tensor parameters and deformability of DFN blocks. Using one or two deterministic joint sets, a total of 224 3-D discrete fracture network (DFN) cube blocks were generated with various configurations of deterministic density and probabilistic size distribution. The fracture tensor parameters were calculated for each generated DFN systems. Also, deformability moduli with respect to three perpendicular direction of the DFN cube blocks were estimated based on distinct element method. The larger the first invariant of fracture tensor, the smaller the values for the deformability moduli of the DFN blocks. These deformability properties present an asymptotic pattern above the certain threshold. It is found that power-law function describes the relationship between the directional deformability moduli and the corresponding fracture tensor components estimated in same direction.
Keywords
Fractured rock mass; Discrete fracture network; Fracture tensor; Deformability; Distinct element method;
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