Numerical modelling of rock fall using extended DDA

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The reasonable design of protective structures to mitigate the hazards from rock fall depends on the knowledge of motion behaviors of falling stones, such as the falling paths, velocities, jump heights and distances. Numerical simulation is an effective way to gain such kind of knowledge. In this paper, the discontinuous deformation analysis (DDA) is applied to rock fall analysis. In order to obtain more reliable results, the following improvements and extensions are made on the original DDA. (1) Solve the problem of block expansions due to rigid body rotation error. (2) Add the function of modeling the drag resistance from air and plants so that the velocities of falling stones obtained by simulations are good enough in agreement with those by experiments in situ. (3) Add the capability to consider energy loss due to block collisions so that the jumping heights and distances obtained by simulations are good enough in agreement with those by experiments even for the slope with very soft layer on its surface. One of application examples is presented to show that the extended DDA is very effective and useful in rock fall analysis. Therefore, the presented method is expected to be put into wide use in slop stability analysis.

Original languageEnglish
Pages (from-to)926-931
Number of pages6
JournalYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
Volume22
Issue number6
Publication statusPublished - Jun 1 2003

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Rocks
rock
modeling
jumping
Drag
Energy dissipation
Hazards
simulation
Experiments
air
stability analysis
energy
Computer simulation
drag
Air
collision
experiment
analysis
rockfalls
hazard

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

Numerical modelling of rock fall using extended DDA. / Chen, Guangqi.

In: Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering, Vol. 22, No. 6, 01.06.2003, p. 926-931.

Research output: Contribution to journalArticle

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