Articles scientifiques

A DFN–DEM Multi‑scale Modeling Approach for Simulating Tunnel Excavation Response in Jointed Rock Masses

AUTHORS: Xin Wang and Ming Cai

ABSTRACT: Based on the concept of the representative elementary volume (REV) and the synthetic rock mass (SRM) modeling technique, a DFN–DEM multi-scale modeling approach is proposed for modeling excavation responses in jointed rock masses. Discrete fracture networks (DFNs) are generated using MoFrac. For a given volume of jointed rock masses, multi-scale DFN models are constructed according to the hierarchical order of fracture size. Based on the DFN models of various scales, equivalent rock mass properties are obtained using 3DEC SRM models. A tunnel excavation simulation using data from the Äspö TAS08 tunnel is conducted to demonstrate the applicability of the proposed multi-scale modeling approach. The modeling results show that it is efficient to model the mechanical response of the rock mass using the proposed approach. The proposed approach has the advantages of both equivalent continuum and discontinuum methods, with a higher degree of accuracy compared with the pure continuum approach and a less computational effort compared with the pure discontinuum approach.

KEYWORDS: Multi-scale approach, Jointed rock mass, Discrete fracture network modeling, Synthetic rock mass, Representative elementary volume, Äspö TAS08 tunnel

CITATION: Wang, X., Cai, M. A DFN–DEM Multi-scale Modeling Approach for Simulating Tunnel Excavation Response in Jointed Rock Masses. Rock Mech Rock Eng 53, 1053–1077 (2020). https://doi.org/10.1007/s00603-019-01957-8

Proposed DFN–DEM multi-scale modeling procedure and related software tools.
Dernières Nouvelles
  • Itasca France has moved! Itasca France's office is now located at : 29 Avenue Joannes Masset 69009 Lyon -...
    En savoir plus
  • Nous avons déménagé! Nous sommes désormais basés dans le 9ème arrondissement de Lyon, dans le secteur de Gorge...
    En savoir plus
  • Les licences Web sont désormais disponibles! Les licences Web sont particulièrement adaptées pour les structures avec de nombreux utilisateurs localisés à...
    En savoir plus

Évènements à Venir
12 oct.
Focused Seismic and Liquefaction Training 2019
... En savoir plus
2 nov.
JNGG 2020 Lyon
The 10th National Days of Geotechnics and Engineering Geology are co-organized by the GeoMaS laboratory of INSA Lyon, ENTPE and Cerema ... En savoir plus
2 févr.
ANALYSES OF EMBANKMENT DAMS AND SLOPES USING FLAC
This hands-on, virtual training course is 16 hours total, spread over four days in a 1.5-week period, and covers the analysis of embank... En savoir plus