Yann Gunzburger
University of Lorraine
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Featured researches published by Yann Gunzburger.
Archive | 2006
Véronique Merrien-Soukatchoff; Yann Gunzburger
We examine the choices model-users have to face when applying models to better understand slope failure and prefailure movements of large rock slopes and illustrate how modelling can help understand rock slope movements. At first, the questions that the models can help to answer are listed. The different types of models available to understand the hydromechanical behaviour of rock slope movements are then specified. Different types of models have been applied to the La Clapiere case. This movement is described and three different modelling analyses of this landslide are outlined. Each model allows an understanding of a part of the problem raised by rock slope movements, but none of them can actually represent totally the phenomena involved in the movement.
International Congress and Exhibition "Sustainable Civil Infrastructures: Innovative Infrastructure Geotechnology" | 2017
Samar S. Ahmed; Marwan AlHeib; Yann Gunzburger; Vincent Renaud
Due to longwall excavations, the upper strata disturb, the roof and the floor of the opening become in contact. This disturbed area is commonly known as the “goaf area”. The challenge of simulating numerically the goaf area is to identify its geometry and its equivalent mechanical properties. The main objective of this study is to improve the 3D numerical simulation of longwall mining and its accompanying goaf area, which will permit us to observe the stress changes due to longwall excavations. The Provence coal mine in the South of France has been chosen to be the case study of the current research, where the mined coal seam has 2.5 m thickness and the average depth of the mine is 1000 m. The longwall panels have a regular width of 200 m and various lengths from 400 up to 1400 m. A large-scale finite difference numerical model of the mine was constructed by using FLAC3D. The numerical modeling of the goaf area was performed in two steps. The first step was to identify the geometry of the goaf area above longwall panels. The second step was to calibrate its equivalent mechanical properties with the total convergence between the roof and the floor. The goaf geometry and the mechanical properties were then calibrated with the in-situ surface subsidence. The results show that applying a linearly varying elastic modulus within the goaf area is a very effective method to express its heterogeneity, which also gave rational surface subsidence values for panels width less than 1000 m. In addition, in terms of stress redistribution, the induced vertical stress increases progressively with panel width, and it becomes close to the initial values at the center of the goaf for panel width larger than 1000 m.
Revue Française de Génie Civil | 2004
Yann Gunzburger
ABSTRACT Rock slope movements can be considered, from a mechanical standpoint, as the consequence of predisposition, preparation and trigger factors. In the case study of the “Rochers de Valabres” slope (Southern French Alps), which experienced major rockfalls in 2000 and 2004, these factors are analysed by means of field observations, high-precision geodetic monitoring and acoustic emissions monitoring, as well as by numerical modelling. This paper places special emphasis on the role of both the fracture network and thermal effects.
International Journal of Rock Mechanics and Mining Sciences | 2005
Yann Gunzburger; Véronique Merrien-Soukatchoff; Yves Guglielmi
Comptes Rendus Geoscience | 2002
Yann Gunzburger; Bernard Laumonier
Earth Surface Processes and Landforms | 2011
Yann Gunzburger; Véronique Merrien-Soukatchoff
Tectonophysics | 2014
Yann Gunzburger; Vincent Magnenet
Natural Hazards and Earth System Sciences | 2014
A. Delonca; Yann Gunzburger; Thierry Verdel
Tectonophysics | 2010
Yann Gunzburger
The Extractive Industries and Society | 2017
Yann Gunzburger; Marie-France Agnoletti; Michel Deshaies; Samuel Ferey; Pascal Raggi