Experiences from Fracture Toughness Testing of Rock According to the ISRMSuggested Methods

摘要

The report contains the results of fracture toughness testing of rock. The workhas been made in cooperation between SveDeFo, and the Tohoku University, Japan. Its purpose has been to define the limits of validity of the ISRM Suggested Methods (SM:s) for determining fracture toughness of rock. This was done by testing over 300 specimens of 19 different rocks and drawing conclusions as to the testing procedures, the accuracy of the methods and method compatibility. Finally, validity recommendations have been made.