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, 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.
ROCK ENGINEERING IN DIFFICULT CONDITIONS
PAPER 3999
Coli N.; Berry P.; Boldini D.; Bruno R.
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/76049
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact