Simple physical model for the fragmentation of rock avalanches

被引：50

作者：

De Blasio, Fabio V. ^{[1
]}

Crosta, Giovanni B. ^{[1
]}

机构：

[1] Univ Milano Bicocca, Dipartimento Sci Geol & Geotecnol, I-20126 Milan, Italy

来源：

ACTA MECHANICA | 2014年 / 225卷 / 01期

关键词：

FRICTION; MOTION; MASS;

D O I：

10.1007/s00707-013-0942-y

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Rock avalanches are the largest granular flows on Earth. In contrast to artificial, small-scale granular avalanches, they exhibit a large degree of fragmentation with reduction of average grain volume by a factor of up to 10(15)-10(18). Even though fragmentation likely affects the whole dynamics of the rock avalanche, as yet the basic mechanics of the process is poorly known. In this work, a simple model is presented for the fragmentation of rock avalanches, assuming that most of the fragmentation occurs along force chains in the granular medium. The landslide motion is simulated along a curved bumpy profile path. The predicted grain spectra are found to agree reasonably with field data.

引用

页码：243 / 252

页数：10

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