Associate Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Title of Paper:Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading
Hits:
Date of Publication:2016-01-01
Journal:SHOCK AND VIBRATION
Included Journals:SCIE、EI、Scopus
Volume:2016
ISSN No.:1070-9622
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.
Open time:..
The Last Update Time: ..