About On the dynamic modulus of elasticity of some rocks
Abstract
In the calculation of pillars, the study of stresses in the massif around unsupported excavations and in other similar problems is important to establish the value of the modulus of elasticity of rocks. When testing concrete, along with the determination of the modulus of elasticity under static loading on conventional testing machines, acoustic methods - pulse and resonance, allowing determination of the dynamic modulus of elasticity - are now widely developed. The pulse method consists in measuring the velocity of acoustic signal propagation. It is possible to determine the modulus of elasticity both in the sample and in the massif. In the resonant method, the natural frequency of the bending vibrations of the specimen is usually measured ...
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References
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