Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Reexamination Certificate
2006-05-16
2006-05-16
Kwok, Helen (Department: 2856)
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
C073S594000, C073S582000
Reexamination Certificate
active
07043989
ABSTRACT:
The invention concerns a method of testing the installation quality of a grouted anchor system comprising at least one tendon anchored by grout in a hole in a surrounding mass. The system typically includes a group of roof bolts (10, 12) each having a tendon (10.1, 10.2) anchored in a rock mass (22) by grout (14, 16). The method includes the steps of applying an acoustic signal to the system, detecting the acoustic response(s) of the tendon(s) and assessing the installation quality of the tendon(s) from an analysis of such response(s). The invention also includes apparatus for use in the method.
REFERENCES:
patent: 5457994 (1995-10-01), Kwun et al.
patent: 5798981 (1998-08-01), Littlejohn et al.
patent: 5821430 (1998-10-01), Kwun et al.
patent: 6109109 (2000-08-01), Brown
patent: 6422079 (2002-07-01), Rodger et al.
patent: 2003-315214 (2003-11-01), None
James L. Withiam, et al., NCHRP (National Cooperative Highway Research Program), Report 477, entitled “Recommended Practice for Evaluation of Metal-Tensioned Systems In Geotechnical Applications”, 2002.
D'Appolonia, McMahon & Mann, NCHRP (National Cooperative Highway Research Program), Web Document 27 Entitled Evaluation of Metal-Tensioned Systems in Geotechnical Applications, Phase 1—Interim Report, Mar. 2001.
A.M. Kelly and A.J. Jager, SIMRAC (Safety in Mines Research Advisory Committee) Final Project Report Entitled “Critically Evaluate Techniques for the In Situ Testing of Steel Tendon Grouting Effectiveness as a Basis for Reducing Fall of Ground Injuries and Fatalities”, Oct. 1996.
Johann Haarhoff, Literature Review for In Situ Bolt Integrity Tester, which summarizes a review of the literature conducted by the inventors Haarhoff and Canbulat, no date.
Brink Van Zyl
Canbulat Ismet
Haarhoff Johann
CSIR
Frommer & Lawrence & Haug LLP
Kwok Helen
Santucci Ronald R.
LandOfFree
Method and apparatus for testing installation quality in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for testing installation quality in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for testing installation quality in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3539257