Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading

Tianhui Ma, Long Wang, Fidelis Tawiah Suorineni, Chunan Tang

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Severe damage occurs frequently in mine pillars subjected to shear stresses. The empirical design charts or formulas for mine pillars are not applicable to orebodies under shear. In this paper, the failure process of pillars under shear stresses was investigated by numerical simulations using the rock failure process analysis (RFPA) 2D software. The numerical simulation results indicate that the strength of mine pillars and the corresponding failure mode vary with different width-to-height ratios and dip angles. With increasing dip angle, stress concentration first occurs at the intersection between the pillar and the roof, leading to formation of microcracks. Damage gradually develops from the surface to the core of the pillar. The damage process is tracked with acoustic emission monitoring. The study in this paper can provide an effective means for understanding the failure mechanism, planning, and design of mine pillars.

Original languageEnglish
Article number6195482
JournalShock and Vibration
Volume2016
DOIs
Publication statusPublished - Jan 1 2016
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials
  • Mechanical Engineering

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