Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models
Geotechnical rockmass characterization is a key task for design of underground and open pit excavations. Hydrothermal veins influence excavation performance by contributing to stress-driven rockmass failure. This study investigates the effects of vein orientation and thickness on stiffness and peak...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-11-01
|
| Series: | Geotechnics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-7094/3/4/67 |
| _version_ | 1797380919667982336 |
|---|---|
| author | Gisèle A. Rudderham Jennifer J. Day |
| author_facet | Gisèle A. Rudderham Jennifer J. Day |
| author_sort | Gisèle A. Rudderham |
| collection | DOAJ |
| description | Geotechnical rockmass characterization is a key task for design of underground and open pit excavations. Hydrothermal veins influence excavation performance by contributing to stress-driven rockmass failure. This study investigates the effects of vein orientation and thickness on stiffness and peak strength of laboratory scale specimens under uniaxial and triaxial compression using finite element numerical experiments of sulfide veined mafic igneous complex (CMET) rocks from El Teniente mine, Chile. The initial numerical models are calibrated to and validated against physical laboratory test data using a multi-step calibration procedure, first of the unveined Lac du Bonnet granite to define the model configuration, and second of unveined and veined CMET. Once calibrated, the numerical experiment involves varying the vein geometry in the veined CMET models by orientation (5 to 85°) and thickness (1, 4, 8 mm). This approach enables systematic investigation of any vein geometry without limitations of physical specimen availability or complexity of physical materials. This methodology greatly improves the value of physical laboratory test data with a limited scope of vein characteristics by using calibrated numerical models to investigate the effects of any other vein geometry. In this study, vein orientation and thickness were both found to have a significant impact on the specimen stiffness and peak strength. |
| first_indexed | 2024-03-08T20:43:55Z |
| format | Article |
| id | doaj.art-89d195d0badf453b8df36974736a9fb3 |
| institution | Directory Open Access Journal |
| issn | 2673-7094 |
| language | English |
| last_indexed | 2024-03-08T20:43:55Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geotechnics |
| spelling | doaj.art-89d195d0badf453b8df36974736a9fb32023-12-22T14:11:42ZengMDPI AGGeotechnics2673-70942023-11-01341219125010.3390/geotechnics3040067Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical ModelsGisèle A. Rudderham0Jennifer J. Day1Department of Geological Sciences and Geological Engineering, Queen’s University, Kingston, ON K7L 3N6, CanadaDepartment of Geological Sciences and Geological Engineering, Queen’s University, Kingston, ON K7L 3N6, CanadaGeotechnical rockmass characterization is a key task for design of underground and open pit excavations. Hydrothermal veins influence excavation performance by contributing to stress-driven rockmass failure. This study investigates the effects of vein orientation and thickness on stiffness and peak strength of laboratory scale specimens under uniaxial and triaxial compression using finite element numerical experiments of sulfide veined mafic igneous complex (CMET) rocks from El Teniente mine, Chile. The initial numerical models are calibrated to and validated against physical laboratory test data using a multi-step calibration procedure, first of the unveined Lac du Bonnet granite to define the model configuration, and second of unveined and veined CMET. Once calibrated, the numerical experiment involves varying the vein geometry in the veined CMET models by orientation (5 to 85°) and thickness (1, 4, 8 mm). This approach enables systematic investigation of any vein geometry without limitations of physical specimen availability or complexity of physical materials. This methodology greatly improves the value of physical laboratory test data with a limited scope of vein characteristics by using calibrated numerical models to investigate the effects of any other vein geometry. In this study, vein orientation and thickness were both found to have a significant impact on the specimen stiffness and peak strength.https://www.mdpi.com/2673-7094/3/4/67triaxial compressive stress experimentsfinite element methodgeomechanics numerical modellingnumerical calibrationmodel validationhydrothermal veined rocks |
| spellingShingle | Gisèle A. Rudderham Jennifer J. Day Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models Geotechnics triaxial compressive stress experiments finite element method geomechanics numerical modelling numerical calibration model validation hydrothermal veined rocks |
| title | Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models |
| title_full | Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models |
| title_fullStr | Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models |
| title_full_unstemmed | Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models |
| title_short | Veined Rock Performance under Uniaxial and Triaxial Compression Using Calibrated Finite Element Numerical Models |
| title_sort | veined rock performance under uniaxial and triaxial compression using calibrated finite element numerical models |
| topic | triaxial compressive stress experiments finite element method geomechanics numerical modelling numerical calibration model validation hydrothermal veined rocks |
| url | https://www.mdpi.com/2673-7094/3/4/67 |
| work_keys_str_mv | AT giselearudderham veinedrockperformanceunderuniaxialandtriaxialcompressionusingcalibratedfiniteelementnumericalmodels AT jenniferjday veinedrockperformanceunderuniaxialandtriaxialcompressionusingcalibratedfiniteelementnumericalmodels |