INSTALLATION INDUCED STRESSES FOR GROUTED ROOF BOLTS

The judicious use of roof bolts in stabilizing underground openings necessitates the ability to determine the state of stress in and around such bolts. A method of modeling A system of roof bolts is presented. This method is then applied in the determination of the state of stress due to bolt tightening. Two specific roof bolt configurations are considered: a fully grouted post-tensioned bolt and A post-tensioned bolt with grouted-end anchorage. The analysis showed that the grout annulus transferred nearly all of the bolt load into the rock within a distance of 12 hole diameters from the point of bolt load application. (A) /TRRL/

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,   England 
  • Authors:
    • Nitzsche, R N
    • Haas, C J
  • Publication Date: 1976-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00137491
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 6 1976 12:00AM