MOMENTUM TRANSFER AND FRICTION IN THE DEBRIS OF ROCK AVALANCHES

When a mass of loose, dry, purely frictional material slides down an incline after release at a given velocity, the runout (the distance the centre of gravity of the displaced mass moves from its initial position) depends on momentum transfer within the mass. This can be estimated from the profile of the debris accumulation, which also allows more accurate calculation of apparent angles of sliding friction in rockfall avalanches. The apparent extreme mobility of the Elm and Frank slides, typical rockfall avalanches, is explained by momentum transfer in a loose, dry, purely frictional material with an angle of friction of 30 deg.

• Corporate Authors:

  National Research Council of Canada

  Research Journals
  Ottawa, Ontario K1A 0R6,   Canada 
• Authors:
  • Van Gassen, W
  • CRUDEN, D M
• Publication Date: 1989-11

Media Info

• Features: Figures; References;
• Pagination: p. 623-628
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 26
  • Issue Number: 4
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Avalanches; Energy transfer; Friction; Momentum; Rockfalls; Sliding friction
• Uncontrolled Terms: Friction angle
• Old TRIS Terms: Momentum transfer; Runout distance
• Subject Areas: Energy; Geotechnology; Highways;

Filing Info

• Accession Number: 00491978
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 31 1990 12:00AM