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 language | English |
|---|---|
| Article number | 6195482 |
| Journal | Shock and Vibration |
| Volume | 2016 |
| DOIs | |
| Publication status | Published - Jan 1 2016 |
| Externally published | Yes |
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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 journal › Article
}
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.
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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 -