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 journalArticle

6 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

Fingerprint

failure modes
pillar
Failure modes
numerical analysis
Numerical analysis
shear
damage
shear stress
Shear stress
stress concentration
roofs
microcracks
Computer simulation
acoustic emission
Microcracks
charts
Acoustic emissions
dip
Roofs
intersections

ASJC Scopus subject areas

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

Cite this

Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading. / Ma, Tianhui; Wang, Long; Suorineni, Fidelis Tawiah; Tang, Chunan.

In: Shock and Vibration, Vol. 2016, 6195482, 01.01.2016.

Research output: Contribution to journalArticle

@article{abf91761c9804bc1aa8c9d2960e8eefa,
title = "Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading",
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.",
author = "Tianhui Ma and Long Wang and Suorineni, {Fidelis Tawiah} and Chunan Tang",
year = "2016",
month = "1",
day = "1",
doi = "10.1155/2016/6195482",
language = "English",
volume = "2016",
journal = "Shock and Vibration",
issn = "1070-9622",
publisher = "IOS Press",

}

TY - JOUR

T1 - Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading

AU - Ma, Tianhui

AU - Wang, Long

AU - Suorineni, Fidelis Tawiah

AU - Tang, Chunan

PY - 2016/1/1

Y1 - 2016/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84973120853&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84973120853&partnerID=8YFLogxK

U2 - 10.1155/2016/6195482

DO - 10.1155/2016/6195482

M3 - Article

VL - 2016

JO - Shock and Vibration

JF - Shock and Vibration

SN - 1070-9622

M1 - 6195482

ER -