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Title: A practical tool for the preliminary estimation of stability of underground quarries excavated in jointed chalk layers of north france
Authors: Rafeh, Faten 
Mroueh, Hussein
Burlon, Sébastien
Affiliations: Department of Civil Engineering and Construction 
Keywords: Limestone
Numerical method
Safety factor
Subjects: Geotechnical engineering
Issue Date: 2018
Part of: Numerical methods in geotechnical engineering IX
Start page: 1329
End page: 1335
Conference: European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2018) (9th : 25-27 June 2018 : Portugal) 
The presence of huge surfaces in North France under-lied by unexploited quarries constitutes a risk of damage on both people and constructions. In this paper, a stability analysis of quarries, excavated in jointed chalk substratum of North France by the method of rooms and pillars, is presented. Using geometric data collected from site: width of the pillar W, height of the pillar H, span between pillars L, and the inclination of joints θ, a parametric numerical stability study is conducted. Factors of safety Fs (num) are numerically computed using a classical shear strength reduction technique. A correlated regression technique between Fs (num) at one hand and W, H, L, and θ at the other hand, is integrated for the development of extrapolated formulae factor of safety Fs (ex) . These proposed formulae designate a practical tool for the rapid preliminary estimation of the stability state of jointed chalk quarries having known only few geometric data. © 2018 Taylor & Francis Group, London, UK.
Type: Conference Paper
Appears in Collections:Department of Civil Engineering and Construction

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