Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling
AbstractThe stability of stopes and pillars is a critical concern in deep underground metal mining due to the potential for stress concentration and relaxation that can cause the dynamic failure of pillars. This study employs a finite element approach to investigate the behaviour of crown pillars to...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | Geomatics, Natural Hazards & Risk |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19475705.2023.2234072 |
| _version_ | 1797389234418483200 |
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| author | Vishal Babu Guggari Hemant Kumar Gnananandh Budi |
| author_facet | Vishal Babu Guggari Hemant Kumar Gnananandh Budi |
| author_sort | Vishal Babu Guggari |
| collection | DOAJ |
| description | AbstractThe stability of stopes and pillars is a critical concern in deep underground metal mining due to the potential for stress concentration and relaxation that can cause the dynamic failure of pillars. This study employs a finite element approach to investigate the behaviour of crown pillars to various stress and geo-mining parameters. The analysis includes examining stresses, deformations, and yielding zones around the crown pillars using variations in rock mass parameters. The study involves 240 non-linear numerical models with the Mohr–Coulomb elastoplastic failure criteria under plane strain conditions. The results indicate that increasing the crown pillar thickness from 5 to 8 m reduces maximum vertical deformation by 55.8% and the maximum extent of yielding zones from 2.2 to 0 m. The study suggests a 6 m crown pillar for depths up to 670.56 m and thicker pillars of 7 m or more for greater depths. |
| first_indexed | 2024-03-08T22:52:54Z |
| format | Article |
| id | doaj.art-cebb119baaa148d1a0c9a813a4b4a6ba |
| institution | Directory Open Access Journal |
| issn | 1947-5705 1947-5713 |
| language | English |
| last_indexed | 2024-03-08T22:52:54Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj.art-cebb119baaa148d1a0c9a813a4b4a6ba2023-12-16T08:49:46ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132023-12-0114110.1080/19475705.2023.2234072Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modellingVishal Babu Guggari0Hemant Kumar1Gnananandh Budi2Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, IndiaDepartment of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, IndiaDepartment of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, IndiaAbstractThe stability of stopes and pillars is a critical concern in deep underground metal mining due to the potential for stress concentration and relaxation that can cause the dynamic failure of pillars. This study employs a finite element approach to investigate the behaviour of crown pillars to various stress and geo-mining parameters. The analysis includes examining stresses, deformations, and yielding zones around the crown pillars using variations in rock mass parameters. The study involves 240 non-linear numerical models with the Mohr–Coulomb elastoplastic failure criteria under plane strain conditions. The results indicate that increasing the crown pillar thickness from 5 to 8 m reduces maximum vertical deformation by 55.8% and the maximum extent of yielding zones from 2.2 to 0 m. The study suggests a 6 m crown pillar for depths up to 670.56 m and thicker pillars of 7 m or more for greater depths.https://www.tandfonline.com/doi/10.1080/19475705.2023.2234072Numerical modellingcrown pillar stabilitysub-level open stopezone of stress relaxation |
| spellingShingle | Vishal Babu Guggari Hemant Kumar Gnananandh Budi Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling Geomatics, Natural Hazards & Risk Numerical modelling crown pillar stability sub-level open stope zone of stress relaxation |
| title | Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling |
| title_full | Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling |
| title_fullStr | Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling |
| title_full_unstemmed | Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling |
| title_short | Stability analysis of crown pillar under the zone of relaxation around sub-level open stopes using numerical modelling |
| title_sort | stability analysis of crown pillar under the zone of relaxation around sub level open stopes using numerical modelling |
| topic | Numerical modelling crown pillar stability sub-level open stope zone of stress relaxation |
| url | https://www.tandfonline.com/doi/10.1080/19475705.2023.2234072 |
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