Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading
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 ro...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2016/6195482 |
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| _version_ | 1850169633538048000 |
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| author | Tianhui Ma Long Wang Fidelis Tawiah Suorineni Chunan Tang |
| author_facet | Tianhui Ma Long Wang Fidelis Tawiah Suorineni Chunan Tang |
| author_sort | Tianhui Ma |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-a160cea6fb6147bfb4861e1990a883cd |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-a160cea6fb6147bfb4861e1990a883cd2025-08-20T02:20:41ZengWileyShock and Vibration1070-96221875-92032016-01-01201610.1155/2016/61954826195482Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear LoadingTianhui Ma0Long Wang1Fidelis Tawiah Suorineni2Chunan Tang3State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaSchool of Mining Engineering, Faculty of Engineering, UNSW Australia, Sydney, NSW 2051, AustraliaState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaSevere 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.http://dx.doi.org/10.1155/2016/6195482 |
| spellingShingle | Tianhui Ma Long Wang Fidelis Tawiah Suorineni Chunan Tang Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading Shock and Vibration |
| title | Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading |
| title_full | Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading |
| title_fullStr | Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading |
| title_full_unstemmed | Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading |
| title_short | Numerical Analysis on Failure Modes and Mechanisms of Mine Pillars under Shear Loading |
| title_sort | numerical analysis on failure modes and mechanisms of mine pillars under shear loading |
| url | http://dx.doi.org/10.1155/2016/6195482 |
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