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A centrifuge experiment to derive insight on rock fragmentation within sturzstroms

Abstract:

This study presents boundary conditions and instrumentation for a centrifuge experiment to simulate fragmentation within a fast moving rock mass as part of a research effort to investigate the thermodynamics of sturzstroms. Sturzstroms are rock slides of very large volume and extreme run out, which display intensive fragmentation of blocks of rock due to inter-particle impacts within a collisional flow regime. The mechanical set up of this physical model delivers a guided experimental rock slide imposed by a dynamic acceleration field. Analogue rock material is stored in a hopper and released in-flight by a pneumatic trap door into an acceleration chute, and progressing to a run out chute. This reflects the prototype situation of a sturzstrom which includes a source, transit, and deposition zone. The instrumentation includes light barriers, a triaxial force sensor, frictional heat sensors, and high and low speed cameras with illumination provided by light emitting diodes.

Authors:

Imre, Bernd and Laue, Jan and Springman, Sarah M.

Index Terms:

SoilGroup; centrifuge; rock; sturzstrom; centrifuge modelling; Imre, Bernd; Laue, Jan; Springman, Sarah M.

Further Information:

Date published: 2010