THE USE OF INCLINED HEMISPHERE PROJECTION METHODS FOR THE DETERMINATION OF LINEMATIC FEASIBILITY, SLIDE DIRECTION AND VOLUME OF ROCK BLOCKS

The paper explains the use of inclined hemisphere projection methods which allow the assessment of kinematic feasibility, plane(s) of sliding, slide direction and maximum volume of polyhedral blocks defined by the mutual intersection of planar discontinuities and a rock excavation face of any orientation. The methods, which rely on the construction of an inclined hemisphere projection whose plane of projection coincides with the plane of the rock face, are introduced by means of examples that demonstrate the analysis of tetrahedral blocks at planar faces. Subsequent examples deal with pentahedral and polyhedral blocks at bi-planar and curved excavation faces. The methods described can be used prior to, or during, excavation to identify potentially unstable block geometries that merit detailed stability analysis. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,   England 
  • Authors:
    • PRIEST, S D
  • Publication Date: 1980-2

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Filing Info

  • Accession Number: 00312303
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Dec 30 1980 12:00AM