Numerical simulation on pillar failure patterns

T. H. Ma, F. T. Suorineni, C. A. Tang, L. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Mine pillars are in-situ rock left after mining to ensure mine safety. The determination of pillar sizes dictates the cost of mining and mine safety. In this study, the rock fracturing progress analysis program, RFPA, was adopted to simulate pillars of various sizes to understand their failure mechanisms and patterns. The simulation results indicate that with increasing pillar size, the failure mode changes from tensile splitting to shear failure of the pillar with failure initiating from the pillar boundaries. Failure first occurs on the pillar surface and gradually develops toward the core of the pillar. Finally, shear failure occurs in the pillar. With increasing dip angle of the pillar, stress concentration first appears at the four corners, leading to micro-cracking. As the stress in the pillar continuously increases, micro-cracks gradually coalesce. Subsequently, spalling occurs and failure ensures at the pillar core.

Original languageEnglish
Title of host publicationISRM International Symposium - EUROCK 2016
PublisherInternational Society for Rock Mechanics
Number of pages5
ISBN (Electronic)9781138032651
Publication statusPublished - Jan 1 2016
Externally publishedYes
EventISRM International Symposium - EUROCK 2016 - Urgup, Turkey
Duration: Aug 29 2016Aug 31 2016

Publication series

NameISRM International Symposium - EUROCK 2016


ConferenceISRM International Symposium - EUROCK 2016

ASJC Scopus subject areas

  • Geochemistry and Petrology

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