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Analyzing Contact Heterogeneity and Its Geological Implications in Granite Uniaxial Compression Tests
Rock fracturing involves the initiation and propagation of fissures, a process influenced by the inherent mineralogical properties. The contact heterogeneity among minerals, however, poses a significant question regarding its effects on the fracturing mechanics of rocks. In this study, the uniaxial compression test was conducted on granite specimens to derive insights for the development of a numerical model. Subsequent modifications in the microparameters of the calibrated model facilitated an analysis aimed at evaluating the influence of contact variability on two critical outcomes: peak strength and the total fractures. It is found that the normal-to-shear stiffness ratio, cohesion, and tensile strength are the primary factors affecting the peak strength and total fractures. A decrement in the normal-to-shear stiffness ratio was associated with a reduction in peak strength alongside an increase in fracture quantity. Conversely, a diminution in cohesion between different minerals was observed to markedly attenuate both the peak strength and the overall fracture count. Similarly, a reduction in tensile strength between differing minerals escalated the total fractures, albeit exerting a negligible effect on peak strength. This study offers the understanding of the interplay between mineral contact heterogeneity and the fracturing behavior of rocks, revealing critical micromechanical parameters that govern the structural integrity and failure patterns observed in geological materials.
Analyzing Contact Heterogeneity and Its Geological Implications in Granite Uniaxial Compression Tests
Rock fracturing involves the initiation and propagation of fissures, a process influenced by the inherent mineralogical properties. The contact heterogeneity among minerals, however, poses a significant question regarding its effects on the fracturing mechanics of rocks. In this study, the uniaxial compression test was conducted on granite specimens to derive insights for the development of a numerical model. Subsequent modifications in the microparameters of the calibrated model facilitated an analysis aimed at evaluating the influence of contact variability on two critical outcomes: peak strength and the total fractures. It is found that the normal-to-shear stiffness ratio, cohesion, and tensile strength are the primary factors affecting the peak strength and total fractures. A decrement in the normal-to-shear stiffness ratio was associated with a reduction in peak strength alongside an increase in fracture quantity. Conversely, a diminution in cohesion between different minerals was observed to markedly attenuate both the peak strength and the overall fracture count. Similarly, a reduction in tensile strength between differing minerals escalated the total fractures, albeit exerting a negligible effect on peak strength. This study offers the understanding of the interplay between mineral contact heterogeneity and the fracturing behavior of rocks, revealing critical micromechanical parameters that govern the structural integrity and failure patterns observed in geological materials.
Analyzing Contact Heterogeneity and Its Geological Implications in Granite Uniaxial Compression Tests
Springer Ser.Geomech.,Geoengineer.
Ismail, Mohamed Abdelkader (Herausgeber:in) / Wang, Leiming (Herausgeber:in) / Chen, Junhui (Autor:in) / Tang, Fei (Autor:in)
International Conference on Mineral Resources, Geotechnology and Geological Exploration ; 2024 ; Shijiazhuang, China
24.12.2024
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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