The boltometer is an electronic instrument for non- destructive in situ testing and control of the quality of grouted rock bolts. On the basis of tests with prototype instruments on rock bolts with varying properties, a classification sytem for cement-grouted bolts has been proposed. Reports are given on tests made on 271 cement- grouted bolts and 21 resin-grouted bolts in order to verify the validity of the classification system. The tests on production bolts showed a fairly high percentage of low- quality rock bolts. Some of these bolts have been overcored or tested by hydraulic jacks. The boltometer opens up new vistas in the field of tunnel support by bolting. The number of the covering abstract of the congress is TRIS no. 385148. (TRRL)

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  • Supplemental Notes:
    • This paper was presented at the Fifth International Congress on Rock Mechanics, Melbourne, Australia, 1983, Volume 1, Theme A.
  • Corporate Authors:

    AA Balkema

    P.O. Box 1675
    Rotterdam,   Netherlands  BR-3000

    Australasian Institute of Mining and Metallurgy

    204 Lygon Street
    Carlton, Victoria  Australia  3053
  • Authors:
    • Bergman, SGA
    • Krauland, N
    • Martna, J
    • Paganus, T
  • Publication Date: 1983

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00385169
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 90 6191 237 7
  • Report/Paper Numbers: BOOK
  • Files: ITRD, TRIS, ATRI
  • Created Date: May 30 1984 12:00AM