NDLI: A softening block approach to simulate excavation in jointed rocks

Content Provider	Springer Nature Link
Author	Jiang, Qinghui Zhou, Chuangbing Li, Dianqing Yeung, Man chu Ronald
Copyright Year	2012
Abstract	The instability of rock masses as a result of excavation is one of the most important rock mechanics problems. This paper proposes a new “softening block” approach for the simulation of stage-wise sequential excavations in jointed rock masses. The concept of a softening block is presented and the corresponding algorithm developed and implemented into the original Discontinuous Deformation Analysis program proposed by Shi. The proposed softening block approach obviates the need to remove the excavated blocks from the calculation model, which further simplifies the work of pre-processing for sequential excavation simulations. Finally, two numerical examples are presented to demonstrate the validity and capability of the proposed approach. The results indicate that it can be used to simulate the excavation in jointed rock mass efficiently and accurately.L’instabilité de masses rocheuses résultant de travaux d’excavation constitue l’un des plus importants problèmes de mécanique des roches. L’article propose une nouvelle approche de “bloc affaibli” pour la simulation de processus d’excavation progressive dans des masses rocheuses fissurées. Le concept du bloc affaibli est présenté, les algorithmes correspondants sont développés et implémentés dans le programme original d’analyse des déformations en milieu discontinu proposé par Shi. L’approche proposée évite d’avoir à enlever les blocs excavés du modèle de calcul, ce qui ensuite simplifie le travail de pré-traitement pour les simulations d’excavations successives. Finalement, deux exemples numériques sont présentés pour démontrer la validité et la capacité de l’approche proposée. Les résultats indiquent qu’elle peut être utilisée pour simuler l’excavation de masses rocheuses fissurées de manière efficace et précise.
Starting Page	747
Ending Page	759
Page Count	13
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	71
Issue Number	4
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-09-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Masses rocheuses fissurées Analyse de déformation en milieu discontinu Bloc affaibli Excavation Geotechnical Engineering & Applied Earth Sciences Geoengineering, Foundations, Hydraulics Nature Conservation Geoecology/Natural Processes
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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