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Summary: 57ième CONGRÈS CANADIEN DE GÉOTECHNIQUE 57TH CANADIAN GEOTECHNICAL CONFERENCE
5ième CONGRÈS CONJOINT SCG/AIH-CNN 5TH JOINT CGS/IAH-CNC CONFERENCE
A 3D ANALYTICAL SOLUTION FOR EVALUATING EARTH PRESSURES
IN VERTICAL BACKFILLED STOPES
Li Li, École Polytechnique de Montréal
Michel Aubertin , École Polytechnique de Montréal
Tikou Belem, Université du Québec en Abitibi-Témiscamingue
Richard Simon, École Polytechnique de Montréal
Michael James, École Polytechnique de Montréal
Bruno Bussière, Université du Québec en Abitibi-Témiscamingue
ABSTRACT
Backfilling is being increasingly used in underground mines for ground control and wastes disposal. The behavior of
backfill is significantly influenced by its interaction with the surrounding rock mass and support structures such as
barricades. Previous work conducted on backfilled stopes, including some recent studies by the authors, indicates that
the theory of arching can be used to estimate the earth pressures in narrow, vertical backfilled openings. In this paper, a
new 3D analytical solution is proposed to evaluate the state of stress within a backfilled vertical stope. The solution is
validated using laboratory experimental results taken from the literature.
RÉSUMÉ
Le remblai est souvent utilisé dans les mines souterraines comme méthode de contrôle de terrain et pour disposer des
rejets miniers. Le comportement du remblai et son interaction avec le massif rocheux adjacent et avec les structures de
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