LIMIT ANALYSIS OF QUASI-STATIC PYRAMIDAL INDENTATION OF ROCK

An approximate analysis of pyramidal indentation into a rock is presented in which the upper bound approach of limit analysis is utilized. The rock is assumed to obey the Mohr-Coulomb yield condition with a small cension cut-off. Two kinematically admissible mechanisms of possible deformation processes, based upon the non-associated flow rule, are adopted for predictions of geometrical variations. The phenomena experimentally observed inrocks, such as dilatancy and deterioration of strength while undergoing deformation, are accounted for approximately in the analysis. The kinematical approach of limit analysis to the problem of block-splitting under pyrimidal indentation is also presented in the paper. A number of possible failure modes are examined and those which give the least upper splitting force are shown in detail. Although the particular solutions presented have limited engineering capacity, the method proposed in the paper may find application in solving many rock engineering problems related to drilling, tunnelling, excavating, etc. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01489062
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Michalowski, R L
• Publication Date: 1985-2

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 31-38
• Serial:
  • Intl J of Rock Mech & Mining Sci & Geomechanic Abs
  • Volume: 22
  • Issue Number: 1
  • Publisher: Pergamon Press, Incorporated
  • ISSN: 0148-9062

Subject/Index Terms

• TRT Terms: Deformation; Drilling; Excavation and tunneling; Excavations; Failure; Mathematical analysis; Rocks; Size; Tunnels; Ultimate load design
• Uncontrolled Terms: Depressions (Indentations)
• ITRD Terms: 6471: Analysis (math); 5595: Deformation; 9014: Dimension; 3871: Drilling; 5520: Failure; 4154: Rock; 3374: Tunnel
• Subject Areas: Bridges and other structures; Geotechnology; Highways;

Filing Info

• Accession Number: 00395520
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Oct 31 1985 12:00AM