Responses of acoustic emission in geomaterials to the action of electric pulses under various values of the compressive load

Zakupin, A.S.; Avagimov, A. A.; Богомолов, Л. М.

doi:10.1134/s1069351306100077

Cited by 13 publications

(17 citation statements)

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“…in the experiments, the value of applied electric energy was comparable to the value of released acoustic energy. Similar results were obtained on rock examples with different piezoelectric properties (Bogomolov et al, 2004;Zacupin et al, 2006). Thus, in the series of laboratory experiments, an effect of increase of acoustic emission stimulated by outer electromagnetic fields was revealed.…”

Section: Main Results and Discussionsupporting

confidence: 74%

“…Assuming that energy fall occurs according to the law of 1/r 2 , we may evaluate its value at the examples (Sobolev and Ponomarev, 2003;Sobolev et al, 2000;Bogomolov et al, 2004;Zacupin et al, 2006) and in natural conditions (Tarasov, 1997;Tarasov et al, 1999;Tarasov and Tarasova, 2004). In previous papers (Sobolev and Ponomarev, 2003;Sobolev et al, 2000), the results of experiments carried out on artificial rock samples are presented.…”

Section: Main Results and Discussionmentioning

confidence: 99%

“…Moreover, the cloud cover on that day was not continuous but there were big cumulus clouds. Electro-impulse effect on acoustic emission activity was earlier studied on geomaterial examples (Sobolev and Ponomarev, 2003;Sobolev et al, 2000;Bogomolov et al, 2004;Zacupin et al, 2006), and on rocks under the effect of impulses emitted by magnetohydrodynamic (MHD) generator (Tarasov, 1997;Tarasov et al, 1999;Tarasov and Tarasova, 2004). In the present study, the increase of emission level in the range of 6.5-11 kHz in sedimentary rocks under the influence of a lightning discharge was registered for the first time.…”

Section: Introductionmentioning

confidence: 99%

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Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

Смирнов

Marapulets

2012

Solid Earth

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Section: Main Results and Discussionsupporting

confidence: 74%

Section: Main Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

Смирнов

Marapulets

2012

Solid Earth

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“…Эксперимент в ИМСС УрО РАН на установке с расширенными диагностическими возможностями (по сравне-нию с ранее проведенными экспериментами, которые описаны в ряде работ [Zakupin et al, 2006a[Zakupin et al, , 2006bBogomolov et al, 2004]) способен дать новую информацию о свойствах акустоэмиссионных и деформационных откликов нагру-женных породных образцов на внешнее электроимпульсное воздействие.…”

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“…the number of AE events per second, and analyses of signals' energy and AE sources' locations, i.e. defects.The experiment was conducted at ICMM with the use of the set of equipment with advanced diagnostic capabilities (as compared to earlier experiments described in [Zakupin et al, 2006a[Zakupin et al, , 2006b Bogomolov et al, 2004]). It can provide new information on properties of acoustic emission and deformation responses of loaded rock specimens to external electric pulses.…”

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confidence: 99%

Laboratory observation of slow movements in rocks

Зуев

Баранникова

Жигалкин

et al. 2012

J Appl Mech Tech Phy

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Results of uniaxial compression tests of rock samples in electromagnetic fields are presented. The experiments were performed in the Laboratory of Basic Physics of Strength, Institute of Continuous Media Mechanics, Ural Branch of RAS (ICMM). Deformation of samples was studied, and acoustic emission (AE) signals were recorded. During the tests, loads varied by stages. Specimens of granite from the Kainda deposit in Kyrgyzstan (similar to samples tested at the Research Station of RAS, hereafter RS RAS) were subject to electric pulses at specified levels of compression load. The electric pulses supply was galvanic; two graphite electrodes were fixed at opposite sides of each specimen. The multichannel Amsy-5 Vallen System was used to record AE signals in the six-channel mode, which provided for determination of spatial locations of AE sources. Strain of the specimens was studied with application of original methods of strain computation based on analyses of optical images of deformed specimen surfaces in LaVISION Strain Master System. Acoustic emission experiment data were interpreted on the basis of analyses of the AE activity in time, i.e. the number of AE events per second, and analyses of signals' energy and AE sources' locations, i.e. defects.The experiment was conducted at ICMM with the use of the set of equipment with advanced diagnostic capabilities (as compared to earlier experiments described in [Zakupin et al., 2006a[Zakupin et al., , 2006b Bogomolov et al., 2004]). It can provide new information on properties of acoustic emission and deformation responses of loaded rock specimens to external electric pulses.The research task also included verification of reproducibility of the effect (AE activity) when fracturing rates responded to electrical pulses, which was revealed earlier in studies conducted at RS RAS. In terms of the principle of randomization, such verification is methodologically significant as new effects, i.e. physical laws, can be considered fully indubitable if they prove stable when some parameters of the experiment are changed. Parameters may be arbitrarily modified within a small range, and randomization is thus another common statistical significance criterion for sample sets obtained at the same conditions. At ICMM, the experiments were conducted in compliance with the principle of randomization [Bogomolov et al., 2011]. In this respect, the material of specimens, loading conditions and characteristics of the electrical pulses source were similar to those in the experiments at RS RAS.As evidenced by the experiments, during electromagnetic field stimulation, the AE activity is manyfold higher than the background activity before the impact. This supports the research results reviewed in [Bogomolov et al., 2011] concerning the AE activity increment of 20 % due to electric pulses in the field twice less strong than that in our experiments at ICMM.The AE energy distribution analysis shows that cumulative distributions of the number of AE signals vs energy (i.e. the number of AE si...

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Failure precursor of surrounding rock mass around cross tunnel in high-steep rock slope

Tang

et al. 2013

J. Cent. South Univ.

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Responses of acoustic emission in geomaterials to the action of electric pulses under various values of the compressive load

Cited by 13 publications

References 0 publications

Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

Laboratory observation of slow movements in rocks

Failure precursor of surrounding rock mass around cross tunnel in high-steep rock slope

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