- 责任者：Cheng Qiangong (Department of Geological Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; China) ; Wang Yufeng
- 刊名：Journal of Mountain Science
- 出版年：2011
- 卷期：29(1)
- 关键词：滑坡 ; landslides
- 页码：p.70-80
- 图表：23 illus., 7 tables, 24 refs.
- 分类号：1702
- issnNo：ISSN1008-2786
- isbnNo：CN51-1516/P
Rock avalanches are commonly preceded by a strong blast of air. As a result of the huge volumes of material involved and long distances traveled, the major threat of rock avalanche to lives, properties and environment comes from its preceding airblast being capable of exerting enormous impacts on objects in the runout path. In mechanism, the airblast was attributed to air pressure rise in front of a fast-moving avalanche, and its movement can be described by the model of viscous, incompressible, steady flow of aerodynamics theory. So three models of the slide bodies on slip surface with different shapes are established and the characteristics of flow field surrounding the bodies are simulated by the software for numerical hydrodynamics, Computational Fluid Dynamics. It is showed that the airblast is controlled remarkably by the shape of slide body, the larger obliquity of walls of leading edge and rear edge of slide body, the greater of the airblast pressure.