Determination of mining-induced stresses using diametral rock core deformations
Abstract Knowledge of ground stresses is crucial for ground control activities such as the design of underground openings, selection of support systems, and analysis for stability. However, it is a known fact that far field stresses experience changes in orientation and magnitude due to the presence...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | International Journal of Coal Science & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40789-022-00549-2 |
| _version_ | 1811335392414138368 |
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| author | Yizhuo Li Hani S. Mitri |
| author_facet | Yizhuo Li Hani S. Mitri |
| author_sort | Yizhuo Li |
| collection | DOAJ |
| description | Abstract Knowledge of ground stresses is crucial for ground control activities such as the design of underground openings, selection of support systems, and analysis for stability. However, it is a known fact that far field stresses experience changes in orientation and magnitude due to the presence of geological structures and due to the excavations created by mining activities. As a result, in-situ stresses around drifts, ramps, and stopes in underground mines are quite different from far field or pre-mining stresses. The purpose of this research is to develop a simple and practical methodology for determining in-situ stresses. Stress relief occurs once the rock core is drilled off. Such relief is a function of the surrounding stress field. This study uses exploration rock cores that are drilled off for the purpose of orebody definition in the underground mine. The method measures and analyzes the diametral core deformations in laboratory. Two case studies from operating underground mines are presented for demonstration. In these case studies, rock core deformations are measured with a customized test apparatus and rock samples were prepared and tested for Young’s modulus and Poisson’s ratio. The differential stress, namely the difference between the local principal stresses in the plane perpendicular to the core rock axis is calculated. It is shown that this methodology is useful for determining the brittle shear ratio in the rock mass, which is of primary interest to ground control studies. |
| first_indexed | 2024-04-13T17:23:24Z |
| format | Article |
| id | doaj.art-b681419646f3443595effeffcd559d1b |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-04-13T17:23:24Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-b681419646f3443595effeffcd559d1b2022-12-22T02:37:53ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232022-10-019111210.1007/s40789-022-00549-2Determination of mining-induced stresses using diametral rock core deformationsYizhuo Li0Hani S. Mitri1Department of Mining and Materials Engineering, McGill UniversityDepartment of Mining and Materials Engineering, McGill UniversityAbstract Knowledge of ground stresses is crucial for ground control activities such as the design of underground openings, selection of support systems, and analysis for stability. However, it is a known fact that far field stresses experience changes in orientation and magnitude due to the presence of geological structures and due to the excavations created by mining activities. As a result, in-situ stresses around drifts, ramps, and stopes in underground mines are quite different from far field or pre-mining stresses. The purpose of this research is to develop a simple and practical methodology for determining in-situ stresses. Stress relief occurs once the rock core is drilled off. Such relief is a function of the surrounding stress field. This study uses exploration rock cores that are drilled off for the purpose of orebody definition in the underground mine. The method measures and analyzes the diametral core deformations in laboratory. Two case studies from operating underground mines are presented for demonstration. In these case studies, rock core deformations are measured with a customized test apparatus and rock samples were prepared and tested for Young’s modulus and Poisson’s ratio. The differential stress, namely the difference between the local principal stresses in the plane perpendicular to the core rock axis is calculated. It is shown that this methodology is useful for determining the brittle shear ratio in the rock mass, which is of primary interest to ground control studies.https://doi.org/10.1007/s40789-022-00549-2In-situ stressesRock core diametral deformationStrain reliefCore-based stress measurementBrittle shear ratio |
| spellingShingle | Yizhuo Li Hani S. Mitri Determination of mining-induced stresses using diametral rock core deformations International Journal of Coal Science & Technology In-situ stresses Rock core diametral deformation Strain relief Core-based stress measurement Brittle shear ratio |
| title | Determination of mining-induced stresses using diametral rock core deformations |
| title_full | Determination of mining-induced stresses using diametral rock core deformations |
| title_fullStr | Determination of mining-induced stresses using diametral rock core deformations |
| title_full_unstemmed | Determination of mining-induced stresses using diametral rock core deformations |
| title_short | Determination of mining-induced stresses using diametral rock core deformations |
| title_sort | determination of mining induced stresses using diametral rock core deformations |
| topic | In-situ stresses Rock core diametral deformation Strain relief Core-based stress measurement Brittle shear ratio |
| url | https://doi.org/10.1007/s40789-022-00549-2 |
| work_keys_str_mv | AT yizhuoli determinationofmininginducedstressesusingdiametralrockcoredeformations AT hanismitri determinationofmininginducedstressesusingdiametralrockcoredeformations |