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Suggested Methods for Rock Failure Criteria: General Introduction
(Springer Wien, 2012)
Evaluation Of Micro-Structural Damage Caused By Needle Penetration Testing
(Springer Heidelberg, 2012)
The needle penetrometer (NP) is a non-destructive, cheap and simple device which can be used indirectly to obtain the uniaxial compressive strength of extremely weak rocks. It requires little sample preparation and can be ...