期刊
INTERNATIONAL JOURNAL OF GEOMECHANICS
卷 16, 期 6, 页码 -出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0000649
关键词
Particle flow modeling; Rock mass; Nonpersistent joints; Joint geometry; Joint gap
资金
- State Key Laboratory for Geo-mechanics and Deep Underground Engineering, China University of Mining Technology [SKLGDUEK1416]
- National Natural Science Foundation of China [11102224, 51374198]
- Centers for Disease Control and Prevention, Atlanta, Georgia [200-2011-39886]
- Chinese Scholarship Council
- National Basic Research 973 Program of China [2013CB036003]
- Program for New Century Excellent Talents in University, China [NCET-12-0961]
In this study, numerical simulation of rock blocks with nonpersistent open joints under uniaxial compression was undertaken using the particle flow modeling method. First, the micromechanical parameter values of intact material were calibrated through a trial-and-error process using macromechanical laboratory test results. Then, a back-analysis procedure was used to calibrate the joint gap and joint micromechanical parameter values using laboratory test results conducted on jointed rock blocks. Afterward, the effects of joint dip angle, joint persistency, and joint gap on the mechanical behavior of block models having nonpersistent open joints was investigated using the calibrated micromechanical parameter values. The joint dip angle and joint persistency were found to play significant roles in the failure mode, strength, and stress-strain relationship of jointed blocks. The joint gap played a significant to negligible role in the mechanical behavior of jointed block models gradually when the joint dip angle was increased from 0 to 90 degrees. The contact and interaction of joint surfaces were found to have a significant influence on the mechanical behavior of jointed blocks. (C) 2016 American Society of Civil Engineers.
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