Genesis and evolution of discontinuities in geomaterials: Theory and a laboratory experiment

Усольцева, О. М.; Nazarova, Larisa; Цой, П. А.; Nazarov, L. A.; Семенов, В. С.

doi:10.1134/s1062739149010012

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…The maximum press force was set at a fixed cross-head rate of 1 mm/min. Microstrains on the work surface of the prismatic specimens were registered with the help of the automated digital speckle-photography analysis system ALMEC-tv [11].…”

Section: The Objective Of This Work Is To Define the Influence Of Thementioning

confidence: 99%

Evolution of Stress-Strain State in the Structural Heterogeneities Geomaterials under Uniaxial and Biaxial Loading

Oparin¹,

Усольцева²,

Цой³

et al. 2014

JAMP

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The aim of this study was to analyze distribution and development of stress-stress state in structured rock specimens subject to uniaxial and biaxial loading to failure using digital speckle correlation method. Within the experimental analysis of wave processes in the block-hierarchy structure of geomedia (uniaxial and biaxial compression and shearing of prismatic geomaterial specimens), the authors revealed the fact of initiation of low-frequency micro-deformation processes under slow (quasi-static) disturbances. The estimation of the deformation-wave behavior of geomaterials as the "summed" contributions made by elements of the scanned surfaces with different-oriented (in-phase and anti-phase) oscillations has been performed using the energy approach that is based on the scanning function R, analogous to the "center of mass" in the classical mechanics.

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Section: The Objective Of This Work Is To Define the Influence Of Thementioning

confidence: 99%

Evolution of Stress-Strain State in the Structural Heterogeneities Geomaterials under Uniaxial and Biaxial Loading

Oparin¹,

Усольцева²,

Цой³

et al. 2014

JAMP

Self Cite

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“…For both carbon storage and hydrocarbon resource extraction, porous reservoir rock sequences are overlain by sealing rocks, which are much less permeable than the adjacent stratigraphic layers, and which act as significant baffles to fluid exit or entry 59 – 63 . Sealing rocks, and the need to quantify their porosity, permeability, fracturing and faulting, are essential components of effective reservoir management and operation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of geomaterials using microwave sensing

Blanche,

Mitchell,

Shang

et al. 2024

Sci Rep

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Precise characterization of geomaterials improves subsurface energy extraction and storage. Understanding geomaterial property, and the complexities between petrophysics and geomechanics, plays a key role in maintaining energy security and the transition to a net zero global carbon economy. Multiple sectors demand accurate and rapid characterization of geomaterial conditions, requiring the extraction of core plugs in the field for full-field characterization and analysis in the laboratory. We present a novel technique for the non-invasive characterization of geomaterials by using Frequency Modulated Continuous Wave (FMCW) radar in the K-band, representing a new application of microwave radar. We collect data through the delivery of FMCW wave interactions with geomaterials under static and dynamic conditions and show that FMCW can detect fluid presence, differentiate fluid type, indicate the presence of metallic inclusions and detect imminent failure in loaded sandstones by up to 15 s, allowing for greater control in loading up to a failure event. Such precursors have the potential to significantly enhance our understanding of, and ability to model, geomaterial dynamics. This low-cost sensing method is easily deployable, provides quicker and more accessible data than many state-of-the-art systems, and new insights into geomaterial behavior under dynamic conditions.

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“…Modeling nucleation and expansion of movement along interfaces of structural blocks in rock masses can rest upon lab tests of transformations of deformation regimes and parameters of seismicacoustic emission in rock specimens subjected to deformation and failure [7][8][9]. Promising is also the research based on the modern numerical techniques [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission during different-type inter-block movements

Kocharyan

Остапчук

2015

J Min Sci

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The article reports the lab experimentation on seismic/acoustic emission during different-type inter-block movements of rock mass. The fact that co-seismic displacement under induced earthquakes occurs along the existing interfaces is the basis for relatively simple tests on a slip-model plant. Using different materials as fracture fillers allowed modeling entire range of probable deformation modes. The deformation modes are conditionally grouped as creep or steady-state slip, unsteady-state slip and regular discontinuous slip or stick-slip. The authors show that statistics of acoustic emission during slip is described using the Gutenberg-Richter law. The strongest "representative" events under shearing occur quasiregularly, with probability much higher than follows from G-R law. The functional relation is found between the acoustic emission energy and the shear velocity.

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Genesis and evolution of discontinuities in geomaterials: Theory and a laboratory experiment

Cited by 9 publications

References 2 publications

Evolution of Stress-Strain State in the Structural Heterogeneities Geomaterials under Uniaxial and Biaxial Loading

Evolution of Stress-Strain State in the Structural Heterogeneities Geomaterials under Uniaxial and Biaxial Loading

Dynamic analysis of geomaterials using microwave sensing

Acoustic emission during different-type inter-block movements

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