A high mine slope in the disused Santa Barbara open pit mine (Tuscany, Italy) is cut in the Shale-Limestone Chaotic Complex (SLCC), which is a typical bimrock made up of a scaly-fabric clayey matrix including heterometric calcareous blocks. The slope shows evidence of instability phenomena: mainly rotational landslides and toppling countercracks. In order to characterize the mechanical behaviour of the SLCC bimrock, in situ large size non conventional shear tests were performed. The aim of in situ tests is to overcome the size limitation of laboratory specimens and namely to take into account the influence of calcareous blocks on the strength of the bimrock. Bimrock’s strength parameters under natural conditions can be evaluated by means of a limit-equilibrium analysis taking into account shear test data and the geometry of the sliding surface.

In situ large size non conventional shear tests for the mechanical characterization of a bimrock in The Santa Barbara open pit mine (Italy) / Coli, Niccolo'; Berry, Paolo; Boldini, Daniela; Bruno, Roberto. - -:(2009). (Intervento presentato al convegno 43rd US Rock Mechanics Symposium and 4nd US-Canada Rock Mechanics Symposium tenutosi a Asheville; United States).

In situ large size non conventional shear tests for the mechanical characterization of a bimrock in The Santa Barbara open pit mine (Italy)

BERRY, PAOLO;BOLDINI, DANIELA;BRUNO, ROBERTO
2009

Abstract

A high mine slope in the disused Santa Barbara open pit mine (Tuscany, Italy) is cut in the Shale-Limestone Chaotic Complex (SLCC), which is a typical bimrock made up of a scaly-fabric clayey matrix including heterometric calcareous blocks. The slope shows evidence of instability phenomena: mainly rotational landslides and toppling countercracks. In order to characterize the mechanical behaviour of the SLCC bimrock, in situ large size non conventional shear tests were performed. The aim of in situ tests is to overcome the size limitation of laboratory specimens and namely to take into account the influence of calcareous blocks on the strength of the bimrock. Bimrock’s strength parameters under natural conditions can be evaluated by means of a limit-equilibrium analysis taking into account shear test data and the geometry of the sliding surface.
2009
43rd US Rock Mechanics Symposium and 4nd US-Canada Rock Mechanics Symposium
bimrocks; Santa Barbara open-pit mine; shale-limostone chaotic complex; in situ shear tests; fractals
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
In situ large size non conventional shear tests for the mechanical characterization of a bimrock in The Santa Barbara open pit mine (Italy) / Coli, Niccolo'; Berry, Paolo; Boldini, Daniela; Bruno, Roberto. - -:(2009). (Intervento presentato al convegno 43rd US Rock Mechanics Symposium and 4nd US-Canada Rock Mechanics Symposium tenutosi a Asheville; United States).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1326935
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