Microtomographic studies of rock pore space as the basis for rock disintegration technology improvements

Вайсберг, Л. А.; Каменева, Е. Е.; Nikiforova, V.S.

doi:10.17580/or.2018.03.09

Cited by 4 publications

(2 citation statements)

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“…Одной из актуальных задач микромеханики материалов является определение связи эффективных упругих и прочностных свойств материалов с их внутренней структурой [1]. В частности, большой практический интерес представляет исследование влияния трещин и других неоднородностей на свойства горных пород [1][2][3]. Данные о количестве, форме и размерах неоднородностей могут быть получены, например, с использованием микротомографии [2,3].…”

Section: Introductionunclassified

“…В частности, большой практический интерес представляет исследование влияния трещин и других неоднородностей на свойства горных пород [1][2][3]. Данные о количестве, форме и размерах неоднородностей могут быть получены, например, с использованием микротомографии [2,3]. Для оценки влияния трещин на свойства материала может использоваться приближение невзаимодействия [1, 4 -6].…”

Section: Introductionunclassified

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Calculation of the normal and shear compliances of a three-dimensional crack taking into account the contact between the crack surfaces

Lapin

Kuzkin

2019

Lett. Mater.

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The calculation of the effective mechanical properties of materials with cracks is a long-standing problem in micromechanics. Usually each crack is modeled by a mathematical cut with traction free surfaces. In this case, the normal and shear compliances of the crack are approximately equal. Then the effective elastic properties of the material with randomly located and arbitrary oriented cracks are orthotropic. If the partial contact between the crack surfaces is taken into account, then the normal and shear compliances are generally different, and the effective properties are no longer orthotropic. This paper proposes a three-dimensional model for estimation of the effect of contacts on the normal and shear compliances of the crack. An infinite flat crack is considered. The surfaces of the crack are connected by a doubly periodic system of identical contacts. Each contact has the shape of a rectangular parallelepiped. The centers of the contacts form a square lattice. The influence of contact sizes and distance between contacts on the ratio of the normal and shear compliances of the crack is investigated. The compliances are calculated numerically using the finite element method. Calculations are carried out for a periodic cell containing a single contact. It is shown that in all considered cases, the normal compliance of the crack is less than shear compliance. The difference between the compliances increases with increasing contact height. A comparison with similar results obtained in a two-dimensional formulation is carried out. It is shown that in the twodimensional case the ratio of compliances is larger than in the three-dimensional case.

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Section: Introductionunclassified

Calculation of the normal and shear compliances of a three-dimensional crack taking into account the contact between the crack surfaces

Lapin

Kuzkin

2019

Lett. Mater.

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Estimation of Energy of Fracture Initiation in Brittle Materials with Cracks

Lapin

Muschak

Tsaplin

et al. 2019

Advanced Structured Materials

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Raw material base of Russia’s unconventional oil and gas reserves (hydrocarbons shale strata)

et al. 2022

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One of the most controversial and discussed issues related to the development of the hydrocarbon raw material base in recent years is the issue of exploring the possibilities of involvement in industrial development accumulations associated with high-carbon shale complexes that are widespread in Russia. Interest therein is supported by the system of benefits provided by the Government for low-permeability reservoirs and special preferential conditions for geological exploration provided to subsurface users in recent years. An important effect was also achieved by developing a methodology for reserves assessment and placing on the state balance a whole series of fields with oil deposits in the Domanik formation of the Volga-Ural oil and gas province (OGP). Simultaneously, the assessment of the potential of high-carbon formations in the Russian Federation mainly continues to be the subject of scientific research without an applied component, due to its inapplicability for selecting both the most significant areas for exploration and the possibilities of using it to justify investments. Here, the uncertainty is related to the estimation of possible production levels with an unclear correlation between development technologies, filtration and reservoir properties, and the potential of high-carbon strata. This study discusses two approaches that allow assessment of the potential of the main high-carbon strata distributed in Russia.

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Microtomographic studies of rock pore space as the basis for rock disintegration technology improvements

Cited by 4 publications

References 0 publications

Calculation of the normal and shear compliances of a three-dimensional crack taking into account the contact between the crack surfaces

Calculation of the normal and shear compliances of a three-dimensional crack taking into account the contact between the crack surfaces

Estimation of Energy of Fracture Initiation in Brittle Materials with Cracks

Raw material base of Russia’s unconventional oil and gas reserves (hydrocarbons shale strata)

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