Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of 3D Stress State Using a Novel Integrated Diametrical Core Deformation and Ultrasonic Analysis
https://orcid.org/0000-0003-4993-1108
Abstract Sustainable underground mining operation at deep levels requires a clear understanding of in situ stress conditions to ensure safety of personnel and equipment for continuous exaction of natural resources. Obtaining representative three-dimensional (3D) stress data at depth remains a significant challenge due to the operational complexities, high costs and time demands. Despite various methods proposed, core-based in situ stress estimation stands out as a cost-effective and reliable approach. Yet, these techniques come with inherent complexities within the laboratory environment, introducing considerable uncertainties and subjectivity in reliable stress estimation. The diametrical core deformation analysis (DCDA) was introduced to address these challenges, providing improved measurement repeatability and mitigating uncertainties. However, DCDA is limited to two-dimensional (2D) stress state estimation, leaving the determination of the full 3D stress tensor as an unresolved challenge. Therefore, this study presents a novel integrated methodology that combines DCDA with ultrasonic mapping to determine the full 3D stress state from core samples including the azimuth and dip angle of stress components. Both techniques leverage the expansion of core samples under various directions following the release from in situ stress, with greater expansion expected along the axis with the highest principal stress. Stress magnitudes were then calculated using a new analytical technique and the robustness and reliability of the proposed methodology were validated through analysing eight core samples from two vertical boreholes in an Australian underground metalliferous mine. The results were compared with the on-site overcoring stress measurements, having core-based measurements providing reliable predictions of the three principal stresses’ magnitude, azimuth, and dip angle. The current study contributes to sustainable mining by providing a more accurate and less invasive technique for 3D in situ stress estimation. Such an advancement helps to reduce uncertainties in geotechnical assessments, enabling efficient and sustainable mine planning and operation.
Determination of 3D Stress State Using a Novel Integrated Diametrical Core Deformation and Ultrasonic Analysis
https://orcid.org/0000-0003-4993-1108
Abstract Sustainable underground mining operation at deep levels requires a clear understanding of in situ stress conditions to ensure safety of personnel and equipment for continuous exaction of natural resources. Obtaining representative three-dimensional (3D) stress data at depth remains a significant challenge due to the operational complexities, high costs and time demands. Despite various methods proposed, core-based in situ stress estimation stands out as a cost-effective and reliable approach. Yet, these techniques come with inherent complexities within the laboratory environment, introducing considerable uncertainties and subjectivity in reliable stress estimation. The diametrical core deformation analysis (DCDA) was introduced to address these challenges, providing improved measurement repeatability and mitigating uncertainties. However, DCDA is limited to two-dimensional (2D) stress state estimation, leaving the determination of the full 3D stress tensor as an unresolved challenge. Therefore, this study presents a novel integrated methodology that combines DCDA with ultrasonic mapping to determine the full 3D stress state from core samples including the azimuth and dip angle of stress components. Both techniques leverage the expansion of core samples under various directions following the release from in situ stress, with greater expansion expected along the axis with the highest principal stress. Stress magnitudes were then calculated using a new analytical technique and the robustness and reliability of the proposed methodology were validated through analysing eight core samples from two vertical boreholes in an Australian underground metalliferous mine. The results were compared with the on-site overcoring stress measurements, having core-based measurements providing reliable predictions of the three principal stresses’ magnitude, azimuth, and dip angle. The current study contributes to sustainable mining by providing a more accurate and less invasive technique for 3D in situ stress estimation. Such an advancement helps to reduce uncertainties in geotechnical assessments, enabling efficient and sustainable mine planning and operation.
Determination of 3D Stress State Using a Novel Integrated Diametrical Core Deformation and Ultrasonic Analysis
https://orcid.org/0000-0003-4993-1108
Abstract Sustainable underground mining operation at deep levels requires a clear understanding of in situ stress conditions to ensure safety of personnel and equipment for continuous exaction of natural resources. Obtaining representative three-dimensional (3D) stress data at depth remains a significant challenge due to the operational complexities, high costs and time demands. Despite various methods proposed, core-based in situ stress estimation stands out as a cost-effective and reliable approach. Yet, these techniques come with inherent complexities within the laboratory environment, introducing considerable uncertainties and subjectivity in reliable stress estimation. The diametrical core deformation analysis (DCDA) was introduced to address these challenges, providing improved measurement repeatability and mitigating uncertainties. However, DCDA is limited to two-dimensional (2D) stress state estimation, leaving the determination of the full 3D stress tensor as an unresolved challenge. Therefore, this study presents a novel integrated methodology that combines DCDA with ultrasonic mapping to determine the full 3D stress state from core samples including the azimuth and dip angle of stress components. Both techniques leverage the expansion of core samples under various directions following the release from in situ stress, with greater expansion expected along the axis with the highest principal stress. Stress magnitudes were then calculated using a new analytical technique and the robustness and reliability of the proposed methodology were validated through analysing eight core samples from two vertical boreholes in an Australian underground metalliferous mine. The results were compared with the on-site overcoring stress measurements, having core-based measurements providing reliable predictions of the three principal stresses’ magnitude, azimuth, and dip angle. The current study contributes to sustainable mining by providing a more accurate and less invasive technique for 3D in situ stress estimation. Such an advancement helps to reduce uncertainties in geotechnical assessments, enabling efficient and sustainable mine planning and operation.
Determination of 3D Stress State Using a Novel Integrated Diametrical Core Deformation and Ultrasonic Analysis
Rock Mech Rock Eng
Dargahizarandi, Atefeh (Autor:in) / Masoumi, Hossein (Autor:in) / Hashemi, Abolfazl (Autor:in) / Saha, Biswachetan (Autor:in) / Roshan, Hamid (Autor:in)
14.02.2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Analysis of orthotropic rock specimen under diametrical loadings
| British Library Conference Proceedings | 2008