Journal
COMPUTERS AND GEOTECHNICS
Volume 77, Issue -, Pages 56-67Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2016.04.004
Keywords
Defected rock strength; Specimen size; Unconfined Compressive Strength (UCS); Particle Flow Code (PFC); Grain-Based Model (GBM); Discrete Fracture Network (DFN)
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Centre for Excellence in Mining Innovation (CEMI) through the Smart Underground Monitoring and Integrated Technologies (SUMIT) program
- Itasca Consulting Group through its Itasca Education Partnership (IEP) program
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A grain-based distinct element model (GBM) is used to investigate the influence of specimen size on the strength of intact (not defected) and defected rocks. The defected specimens are simulated by integrating a previously calibrated GBM with Discrete Fracture Network models representing defect geometries. The results of scale effect analysis conducted on synthetic specimens show that the strength of intact specimens is independent of specimen size. However, depending on the orientation of defects relative to the loading direction, the strength of defected specimens may decrease, increase or fluctuate with increasing specimen size. (C) 2016 Elsevier Ltd. All rights reserved.
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