TY - JOUR
T1 - Anisotropic shear behavior of closely jointed rock masses
AU - Li, Bo
AU - Jiang, Yujing
AU - Mizokami, Tateru
AU - Ikusada, Kouji
AU - Mitani, Yasuhiro
N1 - Funding Information:
The authors would like to express their appreciation to Lanru Jing at Royal Institute of Technology, Stockholm, Sweden for his help. This study has been partially funded by Kyushu Electric Power Co., Japan and Grant-in-Aid for Young Scientists (B) (No. 24760690 ), Japan. This support is gratefully acknowledged.
PY - 2014/10
Y1 - 2014/10
N2 - In-situ shear tests on a closely jointed rock mass containing two sets of joints, one continuous and another staggered, were conducted. A series of laboratory shear tests with varying combinations of loading conditions and geometrical characteristics of rock joints were also carried out. A Discrete Element Method (DEM) was used to numerically simulate the in-situ and laboratory shear tests. The in-situ tests, laboratory tests and numerical modeling were aimed at evaluating the anisotropic shear behavior of closely jointed rock masses. Comparison between the test and simulation results of this study with the results of similar laboratory tests was completed. The simulation results agreed well with the laboratory test results and provided slightly higher shear stresses comparing to the results of in-situ shear tests. The test and simulation results showed that the jointed rock masses exhibited a strong anisotropic shear behavior, the significance of which depended on the orientation of the continuous joint set. Different failure mechanisms were confirmed in the tested and simulated rock mass models with different geometrical characteristics of rock joints, which resulted in the anisotropic shear behavior.
AB - In-situ shear tests on a closely jointed rock mass containing two sets of joints, one continuous and another staggered, were conducted. A series of laboratory shear tests with varying combinations of loading conditions and geometrical characteristics of rock joints were also carried out. A Discrete Element Method (DEM) was used to numerically simulate the in-situ and laboratory shear tests. The in-situ tests, laboratory tests and numerical modeling were aimed at evaluating the anisotropic shear behavior of closely jointed rock masses. Comparison between the test and simulation results of this study with the results of similar laboratory tests was completed. The simulation results agreed well with the laboratory test results and provided slightly higher shear stresses comparing to the results of in-situ shear tests. The test and simulation results showed that the jointed rock masses exhibited a strong anisotropic shear behavior, the significance of which depended on the orientation of the continuous joint set. Different failure mechanisms were confirmed in the tested and simulated rock mass models with different geometrical characteristics of rock joints, which resulted in the anisotropic shear behavior.
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U2 - 10.1016/j.ijrmms.2014.07.013
DO - 10.1016/j.ijrmms.2014.07.013
M3 - Article
AN - SCOPUS:84907351722
SN - 1365-1609
VL - 71
SP - 258
EP - 271
JO - International Journal of Rock Mechanics and Mining Sciences
JF - International Journal of Rock Mechanics and Mining Sciences
ER -