Analysis of structure and elastic properties of geomaterials using contact broadband ultrasonic structural spectroscopy

Vinnikov, V. A.; Cherepetskaya, Elena B.; Захаров, В. Н.; Malinnikova, O. N.

doi:10.17580/gzh.2017.04.05

Cited by 2 publications

(3 citation statements)

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“…One of the actively developed methods of non-destructive diagnostics of materials is laser-ultrasound structuroscopy, whose effectiveness for assessing the damage of various types of rocks has been demonstrated in numerous studies [11,12]. Therefore, to comply with the previously put forward requirements for conducting the described experiments, before carrying out thermomechanical tests, the specified non-destructive diagnostics of argillite samples was carried out using the "GEOSKAN -02M" device [11,12]. Based on the results of ultrasonic measurements, argillite samples were selected whose acoustic wave propagation velocities belonged to the same range.…”

Section: Research Objectsmentioning

confidence: 99%

Experimental studies of the deformation characteristics of mudstones under high temperature exposure

Blokhin,

Zakorshmennyi,

Minaev

et al. 2024

J. Phys.: Conf. Ser.

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The article presents the results of laboratory thermomechanical tests of argillite samples. It has been confirmed that the deformation-strength properties of the studied type of geomaterials undergo significant changes under high-temperature influences. Features of changes in the values of deformations of argillite samples at various stages of heating were revealed. It is shown that the research results can be used in modeling thermomechanical processes occurring during underground gasification of coal in a reaction channel, to predict the development of deformation of the host rocks of an underground gas generator.

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Section: Research Objectsmentioning

confidence: 99%

Experimental studies of the deformation characteristics of mudstones under high temperature exposure

Blokhin,

Zakorshmennyi,

Minaev

et al. 2024

J. Phys.: Conf. Ser.

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“…Поскольку известняк относится к горным породам, обладающим высокой степенью неоднородности, для получения качественных и обоснованных результатов при выполнении описываемых исследований была создана выборка образцов с близкими значениями физико-механических параметров и схожими структурными особенностями. Для этого был проведен комплекс предварительных испытаний, включающий как стандартные методы определения физико-механических свойств горных пород, так и методы, основанные на интроскопических способах исследования, например растровую электронную микроскопию и лазерную ультразвуковую диагностику [4,14,24].…”

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“…На втором этапе уже из этой серии необходимо было отобрать образцы с примерно одинаковыми значениями пористости. Оценка пористости осуществлялась с использованием лазерной ультразвуковой структуроскопии [4,14,23 По приведенным данным, можно рассчитать локальную пористость образцов [13]:…”

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Experimental study of thermomechanical effects in water-saturated limestones during their deformation

Blokhin¹,

Ivanov²,

Dudchenko³

2021

PMI

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Stability control of elements of stone constructions of various structures is a prerequisite for their safe operation. The use of modern methods of non-destructive diagnostics of the stress-strain state of such constructions is an effective, and in many cases the only way to control it. Studies of thermal radiation accompanying the processes of solid bodies deformation allowed to justify and develop a method that allows to obtain non-contact information about changes in the stress-strain state in various types of geomaterials, including limestones. However, studies of the water saturation influence of rocks on the thermal radiation parameters recorded in this way are currently superficial. Taking into account the water saturation degree of rocks is necessary when monitoring the mechanical condition of stone structures that are in direct contact with water. The main purpose of this work is to study the dependences of changes in the intensity of thermal radiation from the surface of limestone samples with different humidity under conditions of uniaxial compression. The obtained results showed the expected significant decrease in the mechanical properties (uniaxial compressive strength and elastic modulus) of water-saturated samples in comparison with dry ones. At the same time, a significant increase in the intensity of thermal radiation of limestone samples subjected to compression with an increase in their water saturation was recorded, which makes it necessary to take into account the revealed regularity when identifying changes in the stress state of stone structures established according to non-contact IR diagnostics in real conditions.

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Analysis of structure and elastic properties of geomaterials using contact broadband ultrasonic structural spectroscopy

Cited by 2 publications

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Experimental studies of the deformation characteristics of mudstones under high temperature exposure

Experimental studies of the deformation characteristics of mudstones under high temperature exposure

Experimental study of thermomechanical effects in water-saturated limestones during their deformation

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