Criteria for defining the required duration of a creep test

Tomanović, Zvonko; Miladinović, Borko; Zivaljevic, Slobodan

doi:10.1139/cgj-2014-0097

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…They require a long time with a special apparatus and a constant climate (controlled pressure, temperature and humidity). Research procedures are available in [ 49 ]. As a different approach, forced testing after destruction on the direct surface of slip is possible in a modified rotary shear apparatus [ 50 ].…”

Section: Modeling Methodology For Time-dependent Processmentioning

confidence: 99%

Evaluation of Anthropogenic Substrate Variability Based on Non-Destructive Testing of Ground Anchors

et al. 2021

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The purpose of this paper is to describe the variability of soil rheological properties based on research carried out using load tests of ground anchors under complex geotechnical conditions. The heterogeneity of soil should always be considered when designing geotechnical constructions. In the present case, the earthwork created at the Warsaw Slope revealed an embankment of anthropogenic origin, located in a geologically and geomorphologically complex area of the Vistula valley slope. Excavation protection was anchored mainly in soils of anthropogenic origin. When the acceptance tests of the ground anchor were completed, the subsoil randomness was confirmed using nondirect, geostatistical methods. A standard solid rheological model with nonlinear fitting to the data was used. This model was established to describe the creeping activity of the ground anchor more accurately. The characteristics of man-made embankments were described using the parameters obtained with the rheological model of the subsoil.

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Section: Modeling Methodology For Time-dependent Processmentioning

confidence: 99%

Evaluation of Anthropogenic Substrate Variability Based on Non-Destructive Testing of Ground Anchors

et al. 2021

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“…Heiland et al [11,12] studied the relationship between rock porosity, permeability, and effective stress of different rock types and different pore types. Li et al [13][14][15][16] revealed the relationship between the permeability coefficient and stress of fractured rock mass.…”

Section: Introductionmentioning

confidence: 99%

Discussion on Advanced Seepage Reduction Characteristics of Working Face under Seepage‐Damage Coupling

Feng

Zhang

Yang

et al. 2021

Shock and Vibration

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The water burst of roof on working face has been one of the significant geotechnical engineering problems that needs to be urgently resolved. The coupling effects of seepage and damage on the amount and intensity of water inrush from the roof are critically important. In this paper, the seepage-damage coupling mathematical model of the aquifer in the working face is studied, and the seepage-damage coupling mechanics model at different stages of the aquifer is established. Under the coupling of permeability and damage, the water-soil characteristics of the aquifer in the 101163 working face of Mindong were numerically simulated by establishing the constitutive relation between vertical stress and permeability coefficient. The numerical results show that the stress concentration factor of the mining stress field gradually increases with the coal seam mining. The water-flowing fractured zone of the overburden is close to the communication of the quaternary aquifer. When the coal seam is excavated 250–300 m. Three free surfaces appear in the groundwater pressure field, and a large falling funnel is formed to establish a deep flow S-well well flow model. The research on the mining stress field and seepage field is carried out in combination with the Jakob formula. It is found that two sectors with reduced permeability of the fan surface are formed in front of the work. The variation law of the apocalyptic permeability infiltration under different mining distances, different coal seam thicknesses, different water pressures, and different roof management modes is studied systematically. The research indicates that the seepage flow under the condition of seepage infiltration of the lower aquifer should be between 50% and 100% of the traditional calculation method. The research results can help to deepen the understanding of the process of water inrush under the coupling of stress and seepage.

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“…Experimental studies are often performed using creep tests on various rock types and under various conditions, such as different confining pressures and temperatures [12]. Creep tests can be conducted in either single-stage or multi-stage manners [13][14][15]. Since single-stage loading is time-consuming, multi-stage loading has been increasingly employed to obtain the complete creep characteristics of rock, including deceleration creep, constant velocity creep and accelerated creep [16].…”

Section: Introductionmentioning

confidence: 99%

“…In this study, the creep behaviors of AS were investigated both experimentally and numerically. Multi-stage creep tests were conducted on AS samples under different confining pressures(3,6,9,12,15, and 18 MPa). The creep characteristics of AS were analyzed.…”

mentioning

confidence: 99%

Creep Behaviours of Argillaceous Sandstone: An Experimental and Modelling Study

Cai

Zhou

et al. 2020

Applied Sciences

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Understanding the creep behaviours of rocks is essential for the long-term stability of underground excavations in mining engineering. Creep behaviours are more important when the mining depth is greater, which leads to the emergence of weak rock masses and high in situ stresses. In this study, the creep behaviours of argillaceous sandstone (AS) were systematically investigated. For the experimental investigation, creep tests were conducted on AS with different confining pressures (3, 6, 9, 12, 15, and 18 MPa) using an MTS815.02 rock mechanics test system. The mechanical characteristics of AS were analysed. For the numerical study, a nonlinear creep model of AS under equal and different confining pressures was established based on rock creep theory and plastic theory. The results showed that confining pressure could effectively improve the creep failure strength of AS, accelerating its creep deformation rate and process and reducing the final expansion volume. The nonlinear creep model was embedded in the FLAC3D software, and the experimental and numerical results agreed well. The experimental investigation and proposed creep model can provide important guidance in underground mines for safe long-term stability of underground excavations.

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Criteria for defining the required duration of a creep test

Cited by 6 publications

References 5 publications

Evaluation of Anthropogenic Substrate Variability Based on Non-Destructive Testing of Ground Anchors

Evaluation of Anthropogenic Substrate Variability Based on Non-Destructive Testing of Ground Anchors

Discussion on Advanced Seepage Reduction Characteristics of Working Face under Seepage‐Damage Coupling

Creep Behaviours of Argillaceous Sandstone: An Experimental and Modelling Study

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