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Keywords: rebound index
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Proceedings Papers

Paper presented at the ISRM International Symposium, October 23–24, 1973
Paper Number: ISRM-IS-1973-007
... is approximate to rock temperature and infrared method is of limited application. The experimental relations have been given of rebound index and rebound energy absorption index - when testing with rebound hammer - to the thickness of loosened rock. The results of tests of roof loosenings by infrared thermometer...

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