Acoustic emission in composites and applications for stress monitoring in rock masses

Nikolenko, P. V.; Шкуратник, В. Л.

doi:10.1134/s1062739114060118

Cited by 7 publications

(4 citation statements)

References 5 publications

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“…Seismic monitoring methods applying various measurement design, techniques and software to interpret their results were used to evaluate stability of the adjacent ground for open pit mines [8], physical and mechanical properties of soils [9], to determine ground failure and observe karst occurrence [10,11 ], to evaluate rock strength and determine anomalous tectonic zones [12][13][14], to clarify conditions of formation and gas content [15][16][17], to control stress-strain state of sand-clay soil and hard rocks [18,19].…”

Section: Introductionmentioning

confidence: 99%

Landslide hazard zones determination on open pit mine edge by circular seismic sounding method

et al. 2021

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Herein there is an algorithm and method of processing the experimental data obtained by a circular seismic sounding method that makes it possible to increase accuracy in determining an anisotropy coefficient of the ground mechanical properties. The coefficient value is mutually related to the deformation processes at the initial stages of landslide formation. There are results of data processing of the field seismic studies of the adjacent ground at the Angrenskiy coal mine that allow establishing boundaries for the potentially landslide-prone zones, as well as a numerical criterion to predict rock stability under the given conditions.

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Section: Introductionmentioning

confidence: 99%

Landslide hazard zones determination on open pit mine edge by circular seismic sounding method

et al. 2021

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“…The existence of the Kaiser effect was demonstrated through repetitive loading and unloading during three-point bending tests. Stavrakas et al 22 Nikolenko and Shkuratnik 23 analyzed AE signals of composite supporting materials, obtained insight into memory effects, and put forward future research hotspots regarding the surrounding rock.…”

Section: Introductionmentioning

confidence: 99%

Damage and fractal evolution trends of sandstones under constant-amplitude and tiered cyclic loading and unloading based on acoustic emission

Liang

Zhang

Xie

et al. 2019

International Journal of Distributed Sensor Networks

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It is of significance to study the damage and destruction of rock under cyclic loading in geotechnical engineering. We determined the trends in damage evolution of sandstone under constant-amplitude and tiered cyclic loading and unloading under uniaxial compression. The results of the study show that (1) the variation of acoustic-emission events was consistent with the stress curves and 89% of all acoustic-emission events occurred during the cycling stages. The observed Kaiser effect was more notable in tiered cycling. (2) The damage variable increased sharply in the cycling stages and its increment was 0.07 higher for tiered cycling than constant-amplitude cycling. Sandstone exhibited greater damage under tiered cyclic loading and unloading. (3) Equations for the evolution of the damage variable under the two cycle modes were obtained by fitting of experimental data. (4) The fractal dimensions of the constant-amplitude cycle were larger than those of the tiered cycle. The process of damage and destruction presents a trend of reducing fractal dimension. The damage accumulation of sandstone under tiered cycling was faster than under constant-amplitude cycling. These results provide references for damage and early warning of rock under both constant-amplitude and tiered cyclic loading and unloading.

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“…Lavrov [8] observed the Kaiser effect in a brittle limestone cyclically loaded with different loading rates and found that damage formed in rock at a high loading rate can hardly be revealed by reloading with slow rate, yet the damage formed during loading with slow rate can be successfully revealed by using fast reloading. Nikolenko and Shkuratnik [9] found that the load application angle has significant influence on the AE memory effect up to its complete vanishing. Fan et al [10] conducted the fatigue tests of salt rock with discontinuous cyclic loading path containing zero loading stress intervals (ZLIs) of different duration and found that AE evolution was very strongly dependent on the ZLI length and increased with its growth as does the residual nominal strain.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Cyclic Loading and Unloading Rates on Acoustic Emission Evolution and Felicity Effect of Instable Rock Mass

Zhang

Meng

Liu

et al. 2018

Advances in Materials Science and Engineering

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Uniaxial cyclic loading-unloading compression experiments with schemes of six loading rates and six unloading rates were carried out on the combined testing platform. Impact of loading and unloading rates on rock AE characteristics was revealed. Results show that increasing loading and unloading rates resulted in decreasing total AE rings in the entire rock deformation and failure process. Increasing loading rate decreased the AE rings at loading stages, and increasing unloading rate decreased the AE rings at unloading stages in the same cycle. Total AE counts had a negative linear relationship to the loading and unloading rates. The loading stage was the active period of the AE phenomena, and impacts of the loading rate on the AE characteristics were more apparent. Especially when the loading rate was greater than 2.0 kN/s, brittle failure of rock specimens became noticeable. After the cyclic load reached the uniaxial compressive strength of 1/3∼1/2 times, the rock Felicity effect became more obvious. With the increase of the loading rate, the Felicity ratio decreased in the elastic stage and increased a little in the plastic stage, whereas with the increase of the unloading rate, the Felicity ratio decreased gradually in the elastic stage and remained almost the same in the plastic stage.

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Acoustic emission in composites and applications for stress monitoring in rock masses

Cited by 7 publications

References 5 publications

Landslide hazard zones determination on open pit mine edge by circular seismic sounding method

Landslide hazard zones determination on open pit mine edge by circular seismic sounding method

Damage and fractal evolution trends of sandstones under constant-amplitude and tiered cyclic loading and unloading based on acoustic emission

Impacts of Cyclic Loading and Unloading Rates on Acoustic Emission Evolution and Felicity Effect of Instable Rock Mass

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