Validation of GPD to Model Rock Fragmentation by TBM Cutters
Publication: International Journal of Geomechanics
Volume 17, Issue 6
Abstract
In this paper, a novel meshless numerical method known as general particle dynamics (GPD) is developed to reveal the mechanism of the rock fragmentation using tunnel-boring machine (TBM) cutters. Rock fragmentation by one cutter and by two cutters is investigated using GPD. The numerical results obtained from GPD well agree with the previous experimental and numerical results. Moreover, the effects of arrays of flaws on rock fragmentation are also studied using GPD as well as stress fields and rock fragmentation efficiency. It is found from the numerical results that arrays of flaws significantly influence the drivage efficiency of rock fragmentation as well as the depth of chipping and the coalescence modes of flaws.
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Acknowledgments
This work was supported by Project 973 (Grant 2014CB046903), the National Natural Science Foundation of China (51325903 and 51279218), the Natural Science Foundation Project of CQ CSTC (CSTC, cstc2013kjrcljrccj0001, CSTC, and cstc2016jcyjys0005; CSTC, cstc2015jcyjys0002, CSTC, and cstc2015jcyjys0009), the research fund by the Doctoral Program of Higher Education of China (20130191110037), and the Graduate Scientific Research and Innovation Foundation of Chongqing, China (Grant CYB16012).
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 17 • Issue 6 • June 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Mar 3, 2016
Accepted: Sep 8, 2016
Published online: Oct 18, 2016
Discussion open until: Mar 18, 2017
Published in print: Jun 1, 2017
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