Initiation of Acoustic Emission in Fluid-Saturated Sandstone Samplesстатья
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Дата последнего поиска статьи во внешних источниках: 3 октября 2016 г.
Аннотация:A rock behavior experiment with uniaxial compression revealed the effect of acoustic activity in
loaded fluid-saturated Berea sandstone samples in response to an electric current. It is established that it is
substantially intensified in periods of the current impact and decreases after its cut-off. The current impact
also results in a growth of radial deformation indicating an increase in the sample volume. The effect of
acoustic activation increases in response to increased heat emitted by the electric current during its flow
through the sample, which allows the discovered effect to be explained by initiation of its destruction due to
thermal expansion of the fluid in rock interstices and fissures.