scholarly journals Investigation of rock fragmentation during rockfalls and rock avalanches via 3‐D discrete element analyses

2017 ◽  
Vol 122 (3) ◽  
pp. 678-695 ◽  
Author(s):  
Tao Zhao ◽  
Giovanni Battista Crosta ◽  
Stefano Utili ◽  
Fabio Vittorio De Blasio
Keyword(s):  
Discrete Element ◽  
Rock Fragmentation ◽  
Rock Avalanches

A fragmentation-spreading model for long-runout rock avalanches

1999 ◽  
Vol 36 (6) ◽  
pp. 1096-1110 ◽  
Author(s):  
T R Davies ◽  
M J McSaveney ◽  
K A Hodgson
Keyword(s):  
Rock Mass ◽  
High Velocity ◽  
Rock Fragmentation ◽  
Front Part ◽  
Long Runout ◽  
Spreading Model ◽  
Rock Avalanches ◽  
Rear Part ◽  
Dispersive Stress

Based on the observation that deposits of large rock avalanches consist predominantly of intensely fragmented rock debris, it is proposed that the processes of rock fragmentation are significant causes of the peculiar distribution of mass in these deposits, and of the correspondingly long runout. Rock fragmentation produces high-velocity fragments moving in all directions, resulting in an isotropic dispersive stress within the translating rock mass. A longitudinal dispersive force consequently acts in the direction of reducing mass depth and tends to cause the rear part of the avalanche to decelerate and halt and the front part to accelerate. The result is greater longitudinal spreading of the travelling mass compared with nonfragmenting granular avalanches. The longer runout results from this additional fragmentation-induced spreading.

Challenges of a coupled combined finite-discrete element approach to explosive induced rock fragmentation

Fragblast ◽  
1999 ◽  
Vol 3 (3) ◽  
pp. 237-250 ◽  
Author(s):  
A. Munjiza ◽  
J. P. Latham ◽  
K. R. F. Andrews
Keyword(s):  
Discrete Element ◽  
Rock Fragmentation ◽  
Element Approach

scholarly journals Analysis of impact-induced rock fragmentation using a discrete element approach

2017 ◽  
Vol 98 ◽  
pp. 33-38 ◽  
Author(s):  
Wei-Gang Shen ◽  
Tao Zhao ◽  
Giovanni Battista Crosta ◽  
Feng Dai
Keyword(s):  
Discrete Element ◽  
Rock Fragmentation ◽  
Element Approach
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