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Characteristics of discontinuities and their influence on the mechanical behaviour of the rock mass

Caractéristiques des discontinuités d'un massif rocheux et leur influence sur le comportement mécanique

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Summary

Rock mass classification and the rock stability with respect to tunnels and underground openings depends usually not only on the petrology of the rock but also on the rock discontinuity analysis. The article deals with the different types of microstructure of discontinuity fillings. The microstructure of quartz and calcite of hydrothermal origin and tectonic clays as well as the slickensides in them were verified by means of SEM and by X-ray analysis. The examples of the influence of different discontinuity fillings on the stability of galleries in granitoides, gneisses and Lower Carboniferous sediments are also presented.

Résumé

Le classement des massifs rocheux et leur stabilité lors du percement de tunnels ou de travaux souterrains dépendent non seulement de la lithologie des roches mais aussi des discontinuités dans les massifs. L'article traite des différentes microstructures observées dans les rempli de fractures ou fissures. La microstructure du quartz et de la calcite d'origine hydrothermale, les argiles d'origine tectonique ainsi que les matériaux des miroirs de faille sont étudiés au moyen du microscope électronique à balayage et de l'analyse des Rayons X. L'article présente également des exemples de l'influence des différents types de remplissages sur la stabilité de galeries percées dans des granitoïdes, des gneiss et des sédiments du Carbonifère inférieur.

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References

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Authors and Affiliations

  1. Department of Geotechnics, Brno Technical University, Brno, Czechoslovakia

    Šamalíková Milena

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  1. Šamalíková Milena
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Milena, Š. Characteristics of discontinuities and their influence on the mechanical behaviour of the rock mass. Bulletin of the International Association of Engineering Geology 31, 111–121 (1985). https://doi.org/10.1007/BF02594754

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  • DOI: https://doi.org/10.1007/BF02594754

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