Nondestructive shotcrete thickness measurement in underground mines

M. Momayez, R. R. Hassani, P. Guevremont

Research output: Contribution to conferencePaperpeer-review


This paper presents recent in situ and laboratory tests performed on shotcrete liners and test samples. The tests were performed with a nondestructive microseismic method called Impact-Echo. Initial investigations at INCO Ltd's Stobie Mine in Sudbury, Ontario, Canada, confirmed the need for the development of a quick and efficient device capable of determining the thickness of the thin liners. The field study shows that the P-wave velocity in shotcrete is critical for the correct assessment of the liner thickness. Laboratory tests were performed on shotcrete samples at McGill University. The in situ.tests concentrate on the liner thickness measurements and the laboratory tests focus on the change in P-wave velocity and acoustic impedance over time.

Original languageEnglish (US)
Number of pages6
StatePublished - 1999
Event9th International Society for Rock Mechanics Congress, ISRM 1999 - Paris, France
Duration: Aug 25 1999Aug 28 1999


Conference9th International Society for Rock Mechanics Congress, ISRM 1999

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology


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