The exhausted Santa Barbara open pit mine (Tuscany, Italy) has some high slopes excavated in the Shale-Limestone Chaotic Complex Formation (SLCC). The slopes suffer large gravitational sliding movements. From a geotechnical point of view the SLCC can be classified as a typical block-in-matrix rock (bimrock), made up of a gray scaly-fabric clayey matrix including heterometric calcareous blocks. Since the geometrical dimensions of blocks influences the mechanical behaviour of a bimrock, an accurate study was carried out in order to determine these properties by means of indirect non-destructive characterisations: image analysis and geostatistical approach to the data. The volumetric ratio between blocks and the matrix is also investigating by means of in-situ large sized sieving tests.
Investigation of block geometrical properties of the Shale-Limestone Chaotic Complex bimrock of The Santa Barbara open pit mine (Italy) / Coli N.; Berry P.; Boldini D.; Bruno R.. - ELETTRONICO. - (2009), p. PAPER 3999. (Intervento presentato al convegno 3rd Canada-US Rock Mechanics Symposium & 20th Canadian Rock Mechanics Symposium tenutosi a Toronto, ON, Canada nel 9 - 15 May 2009).
Investigation of block geometrical properties of the Shale-Limestone Chaotic Complex bimrock of The Santa Barbara open pit mine (Italy)
COLI, NICCOLO';BERRY, PAOLO;BOLDINI, DANIELA;BRUNO, ROBERTO
2009
Abstract
The exhausted Santa Barbara open pit mine (Tuscany, Italy) has some high slopes excavated in the Shale-Limestone Chaotic Complex Formation (SLCC). The slopes suffer large gravitational sliding movements. From a geotechnical point of view the SLCC can be classified as a typical block-in-matrix rock (bimrock), made up of a gray scaly-fabric clayey matrix including heterometric calcareous blocks. Since the geometrical dimensions of blocks influences the mechanical behaviour of a bimrock, an accurate study was carried out in order to determine these properties by means of indirect non-destructive characterisations: image analysis and geostatistical approach to the data. The volumetric ratio between blocks and the matrix is also investigating by means of in-situ large sized sieving tests.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
