Results 31 to 40 of about 515,328 (302)

Effects of Initial Shear Stress and Vibration Frequency on the Dynamic Pore-Water Pressure of Saturated Sands

open access: yesAdvances in Civil Engineering, 2018
The cyclic triaxial system is used to investigate the effects of confining pressure, initial shear stress, vibration frequency, and dynamic stress on the pore-water pressure characteristics of saturated sand in the Wenchuan area.
Jian Zhang, Jiuting Cao, Sijie Huang
doaj   +1 more source

A semi-empirical model to predict excess pore pressure generation in partially saturated sand [PDF]

open access: yesE3S Web of Conferences, 2020
Past studies revealed that excess pore pressure generation due to cyclic loading is highly governed by induced strains, volumetric deformation potential of soil, number of cycles, and bulk stiffness of pore fluid.
Sayedmasoud Mousavi, Ghayoomi Majid
doaj   +1 more source

Pore-scale dynamics and the multiphase Darcy law

open access: yes, 2020
Synchrotron x-ray microtomography combined with sensitive pressure differential measurements were used to study flow during steady-state injection of equal volume fractions of two immiscible fluids of similar viscosity through a 57-mm-long porous ...
Bijeljic, B, Blunt, MJ, Gao, Y, Lin, Q
core   +1 more source

A Fluid-Solid Coupling Mathematical Model of Methane Driven by Water in Porous Coal

open access: yesGeofluids, 2018
The existence of the water-driven-methane effect in gassy coal has been verified by field tests and laboratory experiments. However, a water-driven-methane mathematical model that considers methane adsorption and desorption has not yet been established ...
Bingxiang Huang, Weiyong Lu
doaj   +1 more source

Numerical analysis on mechanical difference of sandstone under in-situ stress, pore pressure preserved environment at depth

open access: yesInternational Journal of Mining Science and Technology, 2023
Deep in-situ rock mechanics considers the influence of the in-situ environment on mechanical properties, differentiating it from traditional rock mechanics.
Hongwei Zhou   +7 more
doaj   +1 more source

Study on the Variation Rule and Characteristics of Pore Water Pressure in the Failure Process of Saturated Rock

open access: yesShock and Vibration, 2021
With the development of tunnels and other engineering constructions into the deep strata, rock masses are more prone to dynamic damage such as rock bursts under in situ conditions and excavation disturbances.
Yuezheng Zhang
doaj   +1 more source

The effect of undrained heating on a fluid-saturated hardened cement paste [PDF]

open access: yes, 2008
The effect of undrained heating on volume change and induced pore pressure increase is an important point to properly understand the behaviour and evaluate the integrity of an oil well cement sheath submitted to rapid temperature changes.
Ghabezloo, Siavash   +2 more
core   +5 more sources

Experimental study on effect of pore pressure and temperature on nitrogen flow in coal rock

open access: yesMeikuang Anquan, 2021
In order to investigate the influence of pore pressure and temperature on the permeability of coal rocks, based on the constant effective stress, the experiment of coal rock permeability at different pore pressures and temperatures are carried out with ...
YAO Guanlin, TANG Mingyun, ZHENG Pengxian, DUAN Sanzhuang, ZHANG Hailu
doaj   +1 more source

Two hard spheres in a pore: Exact Statistical Mechanics for different shaped cavities [PDF]

open access: yes, 2010
The Partition function of two Hard Spheres in a Hard Wall Pore is studied appealing to a graph representation. The exact evaluation of the canonical partition function, and the one-body distribution function, in three different shaped pores are achieved.
Abramowitz M.   +7 more
core   +3 more sources

Mechanism of pore pressure time lag for saturated clays

open access: yesYantu gongcheng xuebao
Time lag of pore pressure often occurs during oedometer consolidation of saturated clays. After applying loading, the pore pressure measured at the base of specimens increases up to the maximum and then decreases with the increase in consolidation time ...
OU Yanyuxin 1, MOU Cong 1, WENG Jiaxing 2, HONG Zhenshun 1
doaj   +1 more source

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