Recent Advances in Studies of the Strength of Rocks Under True Triaxial Compression Conditions / Postępy W Badaniach Nad Wytrzymałością Skał W Warunkach Prawdziwego Trójosiowego Ściskania

Kwaśniewski, Marek

doi:10.2478/amsc-2013-0080

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Mogi Mogi, 2007;Kwaśniewski, 2013;Rahimi, 2014) performed true triaxial compression experiments on different rock types and interpreted the results.…”

Section: Mogi-coulomb (1971) and Later Extension By Al-ajmi-zimmerman...mentioning

confidence: 99%

Rock failure criteria and mechanisms of failure for excavation stability design: a chronological evolution

Gama¹,

K²

2021

JONAS

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Failure of rock, when it does occur, follows definite mechanical laws and that its probability, can, at least in some instances, be predicted sufficiently in advance of actual occurrence so as to prevent any great danger to the miner. The article chronologically describes rock failure criteria of some practical and most frequently featured strength criteria for predicting failure mechanism of rocks from rock sample or models (lab scale) to total structure or rock mass breakdown (field scale). A cross section range of criteria, from the typical and indispensable to state of the art ones, categorised under isotropic or anisotropic, stress, strain and energy related failure criteria that are predominantly derived on the basis of Coulomb, von Mises and Griffith theories of failure are reviewed. More attention and discussion has been given to most practical criteria like the Mohr-Coulomb and Hoek-Brown. Evolution of mechanisms of rock failure over time by various authors. The paper demonstrates progression of rock failure criteria, and that current theories hinge on classical ones.

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“…Mogi Mogi, 2007;Kwaśniewski, 2013;Rahimi, 2014) performed true triaxial compression experiments on different rock types and interpreted the results.…”

Section: Mogi-coulomb (1971) and Later Extension By Al-ajmi-zimmerman...mentioning

confidence: 99%

Rock failure criteria and mechanisms of failure for excavation stability design: a chronological evolution

Gama¹,

K²

2021

JONAS

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“…Previous scholars have studied the mechanical properties of coal and rock under true triaxial [14] and unloading conditions [15]. Palm studied the stress-strain relations for uniform monotonic deformation under triaxial loading [16].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Mechanical and Acoustic Emission Characteristics of Gassy Coal under Different Stress Paths

Liu

Li³

et al. 2022

IJERPH

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Coal mining leads to stress loading–unloading variation in front of the working face, which influences the occurrence of disasters. In order to study the influence mechanism of stress loading–unloading to the coal failure, a series of experiments of gas-bearing coal deformation and failure under triaxial stress were conducted and acoustic emission (AE) was monitored. In this study, the effect of gas pressure on the mechanical behavior of gas-bearing coal in conventional triaxial stress (CTS) experiments and fixed axial stress and unloading confining stress (FASUCS) experiments was analyzed, and the damage evolution rules of gas-bearing coal in the CTS experiments and FASUCS experiments were determined using AE. The results show that with the increasing of gas pressure, the peak strength and peak strain of gas-bearing coal in the CTS experiments and FASUCS experiments gradually decrease, and the peak of AE ring-down counts lags behind the peak strength. Compared with the CTS experiments, the strength of gas-bearing coal in the FASUCS experiments is lower and the precursor information appears later. The trends in calculated stress and damage coefficient D are consistent with the stress path during unloading, and both begin to rise sharply after the sample enters the plastic stage. Therefore, AE ring-down counts, damage coefficient D, and calculated stress can be used as precursor information for failure of coal and rock, which has great significance for the further study of coal-rock material and for early hazard warning.

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“…The influence of the Talbol power index on the compressive deformation and fractal characteristics of rock samples has also been examined (Yu et al, 2014(Yu et al, , 2016Arasan et al, 2011;Lima et al, 2016;. In addition, researchers have analyzed the influences of various factors, such as different Loading method, loading rate, and axial compression displacement, on the compressive deformation and fractal characteristics of rock samples (Cieslik et al, 2013;Kwasniewski et al, 2013;Singh et al, 2016). Moreover, different water immersion times have been demonstrated to greatly affect the physical and mechanical parameters of crushed rock (Baud et al, 2000;Chen et al, 2018;Xiong et al, 2011;Li et al, 2018;.…”

Section: Introductionmentioning

confidence: 99%

Archives of Mining Sciences

Sun,

Zhang,

Yan

et al. 2020

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COMPRESSIVE DEFORMATION CHARACTERISTICS OF CRUSHED SANDSTONE BASED ON MULTIPLE EXPERIMENTAL FACTORSIn this study, the compressive deformation of crushed sandstone was tested using a crushed rock deformation-seepage test system, and the effects of various factors, including crushed rock grade, grade combination, water saturation status, and stress loading method (i.e., continuous loading or cyclic loading and unloading), on the compressive deformation of crushed sandstone was analyzed from four perspectives including stress-strain, bulking coefficient, deformation mechanism and energy dissipation. The results indicate that the stress-strain relations of crushed sandstone are closely associated with all factors considered, and are well represented by exponential functions. The strain observed for a given applied stress increased with increasing crushed rock grade throughout the loading period. Crushed sandstone grades were combined according to a grading index (n), where the proportion of large-grade rocks in the sample increased with increasing n. The bearing capacity of a water-saturated crushed sandstone sample with n = 0.2 was less than that of an equivalent dry sample for a given applied stress. The stress-strain curve of a water-saturated crushed sandstone sample with n = 0.2 under cyclic loading and unloading was similar to that obtained under continuous loading. Observation and discovery, the deformation mechanism of crushed sandstone was mainly divided into four stages, including crushing, rupture, corner detachment and corner wear. And 20% of the work done by testing machine is used for friction between the crushed sandstone with the inner wall of the test chamber, and 80% is used for the closing of the void between the crushed sandstone, friction sliding, crushing damage.

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Recent Advances in Studies of the Strength of Rocks Under True Triaxial Compression Conditions / Postępy W Badaniach Nad Wytrzymałością Skał W Warunkach Prawdziwego Trójosiowego Ściskania

Cited by 7 publications

References 25 publications

Rock failure criteria and mechanisms of failure for excavation stability design: a chronological evolution

Rock failure criteria and mechanisms of failure for excavation stability design: a chronological evolution

Experimental Investigation on Mechanical and Acoustic Emission Characteristics of Gassy Coal under Different Stress Paths

Archives of Mining Sciences

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