Installation induced stresses for grouted roof bolts
1976; Elsevier BV; Volume: 13; Issue: 1 Linguagem: Inglês
10.1016/0148-9062(76)90223-0
ISSN1879-2073
Autores Tópico(s)Rock Mechanics and Modeling
ResumoThe 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 3nto the rock within a distance of 12 hole diameters from the point of bolt load application.
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