Strength of composite flysch samples under uniaxial compression

Berisavljević, Zoran; Berisavljević, Dušan; Rakić, Dragoslav; Hadži-Niković, Gordana; Radić, Zoran

doi:10.1007/s10064-017-1009-4

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…Berisavljević et al [24] carried out a series of uniaxial compression tests on the combination specimens of sandstone and siltstone. The experimental results show that the inhomogeneity of sample strength seriously affects the accuracy of the experiment.…”

Section: Test Schemementioning

confidence: 99%

An Experimental Investigation on Mechanical Properties and Failure Characteristics of Layered Rock Mass

et al. 2023

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Layered rock mass is a common rock mass structure with diverse forms and complex mechanical properties. Three types of composite layered rock mass prepared using sandstone and shale can be divided into sandwiched type, interbedded type and superimposed type. The total height of the combined rock mass is 50 mm, which is a cylinder composed of sandstone and shale with a diameter of 25 mm and different thickness. Uniaxial compression tests on sandstone, shale and combined rock mass were performed. The results show that, with the increase in the content of soft components, the compressive strength and elastic modulus of the combined rock mass tend to decrease. The mechanical properties of the superimposed rock mass will be between the two components and close to the soft component in numerical value. The mechanical properties of sandwiched rock mass are obviously affected by the properties of the sandwiched rock. When the content of the components is consistent, interbedded rock mass often shows higher strength and elastic modulus. Compared with other rock mass, interbedded rock mass has more stable mechanical properties. The stress–strain curve can be divided into the compaction stage, elastic stage, plastic development stage and post-fracture stage. The composition content of the rock mass plays a decisive role in the compaction stage. The failure modes are mainly shear failure and tensile failure. With the increase in soft rock content, the failure degree of soft rock is gradually weakened, and the failure modes show a trend from tensile failure to shear failure. The experimental results provide theorical guidance for underground engineering construction.

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Section: Test Schemementioning

confidence: 99%

An Experimental Investigation on Mechanical Properties and Failure Characteristics of Layered Rock Mass

et al. 2023

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“…Tziallas [ 30 ] proposed a methodology to predict the strength of serial sandstone and siltstone specimens based on the laboratory results. Berisavljević et al [ 31 ] inspected the influence of lithological heterogeneity on serial sandstone-siltstone specimens’ strength. Furthermore, Lu et al [ 32 ], Huang et al [ 33 ], and Liu et al [ 34 ] investigated the mechanical behavior and failure mode of serial coal-rock specimens by a group of uniaxial compression tests.…”

Section: Introductionmentioning

confidence: 99%

Fracturing Behaviors and Mechanism of Serial Coal Pillar Specimens with Different Strength

et al. 2023

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The fracturing behaviors of serial coal pillars is significant for understanding their failure mechanism. To reveal this, the bearing stress, acoustic emission, electrical resistivity, local strain, force chain distribution, and cracks evolution of serial coal pillars under uniaxial compression were evaluated by experiment and numerical simulation. The results show that four bearing stages are observed during the fracturing process (i.e., nonlinear growth, linear growth, yielding growth, and weakening stages). The acoustic emission features, electrical resistivity responses, strain develops, force chain distributions, cracks evolutions, and local displacement are highly consistent to illustrate the fracturing behaviors. System fracturing of serial coal pillar specimens is appeared along with the collapse of lower uniaxial compressive strength coal pillar specimen. The limit bearing capacity of serial coal pillar specimens is almost equal to the strength of lower uniaxial compressive strength coal pillar specimen. The unbalanced deformation characteristics of serial coal pillar specimens are presented due to the strength differences. The evolution of the key deformation element is the rooted reason for the overall fracturing mechanism of serial coal pillar specimens. For serial coal pillar specimens with different strengths, the critical condition of system fracturing is that the sum of secant modulus of upper and bottom coal pillars is zero, which is expected to predict the system fracturing of serial pillars in the underground coal mining.

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An Anisotropic Failure Criterion for Jointed Rocks Under Triaxial Stress Conditions

Qin,

Li,

et al. 2024

Rock Mech Rock Eng

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Strength of composite flysch samples under uniaxial compression

Cited by 9 publications

References 8 publications

An Experimental Investigation on Mechanical Properties and Failure Characteristics of Layered Rock Mass

An Experimental Investigation on Mechanical Properties and Failure Characteristics of Layered Rock Mass

Fracturing Behaviors and Mechanism of Serial Coal Pillar Specimens with Different Strength

An Anisotropic Failure Criterion for Jointed Rocks Under Triaxial Stress Conditions

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