Memory effects in rock

Шкуратник, В. Л.; Лавров, А. В.

doi:10.1007/bf02046886

Cited by 11 publications

(3 citation statements)

References 5 publications

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“…The mechanism of this phenomenon known as the Kaiser effect, as well as of other memory effects is attributed to irreversible or partially reversible damage caused by loading. The effect takes place when the loading path in the current cycle intersects the damage surface created in the stress space during the previous loading history [67–69]. The damage surface is, for brittle solids, similar to what the yield surface is for ductile solids.…”

Section: Stress (Strain) Memory Effects In Rocksmentioning

confidence: 99%

Fracture‐induced Physical Phenomena and Memory Effects in Rocks: A Review

Lavrov

2005

Strain

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Losing stability, the earth split; Losing strength, the mountains sank. Tao De Ching Abstract: Fracture‐induced physical phenomena allow a real‐time monitoring of damage evolution in rocks induced by mechanical loading. Some of these phenomena, e.g. plastic deformation, changes in permeability and electric resistivity, provide an overall estimate of damage as a function of stress. Others, such as acoustic emission or electromagnetic emission, allow an exact location of cracks in space and time. Being nondestructive, monitoring techniques based on fracture‐induced physical phenomena, are a basis for prediction of earthquakes and rockbursts in underground mines. They are also crucial for a fundamental understanding of rock fracture mechanisms and for developing constitutive models of rock behaviour. Memory effects take place in rocks subjected to cyclic loading with the peak stress (strain) value increasing from cycle to cycle. The effects are represented by certain characteristic changes in rock properties and parameters that are observed when the stress (strain) reaches its previous peak value. Potential applications of memory effects range from stress measurement techniques to earthquake prediction to damage surface scanning. Essential experimental and theoretical results on fracture‐induced physical phenomena and memory effects in rocks are considered in the article. Possible applications as well as not‐yet‐clear points are discussed.

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Section: Stress (Strain) Memory Effects In Rocksmentioning

confidence: 99%

Fracture‐induced Physical Phenomena and Memory Effects in Rocks: A Review

Lavrov

2005

Strain

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“…The Kaiser effect method is based on the assumption that under repeated load, the rock will not generate new cracks or extend the pre-existing cracks when the stress is lower than the previous maximum stress. Therefore, the source of acoustic emission under compression is believed to be the crack generation/growth [3][4][5][6][7][8][9][10][11][12][13][14]. Hereafter we will refer to this mechanism as damage accumulation.…”

Section: Introductionmentioning

confidence: 99%

The rock stress memory unrecoverable by the Kaiser effect method

Hsieh

Dight

Dyskin

2015

International Journal of Rock Mechanics and Mining Sciences

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“…Одним из наиболее известных является эффект Кайзера [10,32], который заключается в невоссоздаваемости акустической эмиссии при циклическом нагружении для напряжений, меньших достигнутых ранее, и последующем резким возрастанием ее активности при превышении данного значения. Также различают ряд других эффектов: электромагнитный эмиссионный [16,27], деформационный, ультразвуковой, электрический, магнитный [25], термоэмиссионный и др. [19,31].…”

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Modeling the processes of deformation and destruction of the rock sample during its extraction from great depths

Grishchenko

Семенов

Melnikov

2021

PMI

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Article investigates the change in the geophysical properties of rocks in the process of extracting the rock sample from great depths. Evaluation of changes in effective elastic properties, porosity and permeability of rock samples during extraction was carried out by means of finite element modeling. Assessment of the critical dimensions and orientation of internal defects, leading to the destruction of the rock samples during extraction from great depths, has been made based on the methods of linear destruction mechanics. Approach that makes it possible to calculate the change in the mechanical properties, porosity and fracturing of reservoir rocks in the process of extracting the rock sample from depths to the surface is proposed. Use of refined data on the mechanical properties of recoverable rock samples makes it possible to increase the accuracy of digital geological models required for geological exploration, determination of reservoir properties and oil and gas saturation of a field, and development of oil and gas deposits. Application of such models is especially relevant at all stages of the fields development with hard-to-recover reserves.

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Memory effects in rock

Cited by 11 publications

References 5 publications

Fracture‐induced Physical Phenomena and Memory Effects in Rocks: A Review

Fracture‐induced Physical Phenomena and Memory Effects in Rocks: A Review

The rock stress memory unrecoverable by the Kaiser effect method

Modeling the processes of deformation and destruction of the rock sample during its extraction from great depths

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