DC-induced acoustic emission in saturated sand models of sedimentary rock

Sobotka, Jerzy

doi:10.2478/s11600-009-0046-1

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…In the last few years, a number of laboratory experiments have been performed to investigate the EMR generated on compression and fracture of rock samples (Lacidogna et al 2011, Koktavy 2009, Sobolev et al 2010, Kobayashi et al 2014. The reverse seismoelectric effect, i.e., generation of elastic vibrations by a rock in an AC electric field, is also essential to the understanding of the EMR physics (Ponomarev et al 2002, Sobotka 2004, 2009a. The investigations were aimed both at verifying some EMR generation models (Frid et al 2003, Koktavy et al 2004, Koktavy 2009 and at finding relationships between the rock properties and the associated electromagnetic phenomena (Sobolev et al 2010, Wan et al 2008, Kobayashi et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Radiation Generated by Acoustic Excitation of Rock Samples

et al. 2016

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The paper presents an experiment on acoustic excitation of electromagnetic radiation (EMR) signals in skarn, sandstone, and magnetite ore samples. For the skarn and sandstone samples, the EMR signal amplitude was observed to decrease with increasing ultimate strength. Supposedly, this effect can be explained by assuming that EMR is generated when an acoustic wave propagates through an electrical double layer. The presence of piezoelectric inclusions (e.g., quartz) in the magnetite ore enhances the analog EMR signal and its spectral components.

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