Results 151 to 160 of about 3,512 (307)

Effects of Water/CO2 on the Shear Mechanical Properties of Straight Jointed Sandstone

open access: yesTaiyuan Ligong Daxue xuebao
[Purposes] The injection of water and/or CO2 alters the shear characteristics of jointed rock, directly impacting the stability of the sequestered formation. Thus, the influence of water injection and CO2 injection on the shear characteristics of jointed
LI Guobin, SHEN Yongxing, FENG Zengchao
doaj   +1 more source

Practical equivalent continuum characterization of jointed rock masses

open access: yes, 2001
A simple practical method to characterize the strength and stiffness of jointed rock masses is presented in this paper. The empirical relations for the strength and stiffness of rock masses have been arrived based on the statistical analysis of a large ...
Sitharam, TG, Sridevi, J, Shimizu, N
core  

Rock Mechanics based on a anisotropic jointed rock model (AJRM)

open access: yes
This book focuses on the fundamentals of rock mechanics as a basis for the safe and economical design and construction of tunnels, dam foundations and slopes in jointed and anisotropic rock. It is divided into four main parts: - Fundamentals and models -
Wittke, Walter
core  

Influence of the continuously increasing normal stress to the failure in case of shearing test

open access: yes, 2002
In a conventional shearing test the normal force or the normal stiffness is kept constant during the experiment. Sliding under constant normal load occurs in slopes if the environment is not changing during the process. The goal of this paper is to
Ván, Péter, Vásárhelyi, Balázs
core  

NUMERICAL SIMULATION OF JOINTED ROCK MASS IN GEOMECHANICAL PROBLEMS [PDF]

open access: yes, 2018
Study the possibility of realistically numerical simulation of a jointed rock mass and estimate the design rock mass strength involving discontinuity surface conditions and various shapes and sizes of rock ...
SOSNA, Dmytro, BABETS, Dmytro
core  

Optimized Selenium‐Doped Nanocomposites for Enhanced Polymer Gel Performance in Permeability Reduction

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Excessive water production in mature oil fields necessitates robust shut‐off treatments, yet conventional polymer gels often fail under high‐temperature and high‐salinity conditions. This study aims to enhance gel thermal stability and mechanical strength by incorporating selenium‐doped Ag/AgO–ZnO nanocomposites synthesized via a novel green ...
Fadhil F. Sead   +8 more
wiley   +1 more source

Synergistic Physicochemical Inhibition of Reactive Shale Formations Using Hydrothermally Synthesized Hydroxyapatite Nickel Tungstate Nanocomposites in Water‐Based Drilling Fluids

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Wellbore instability driven by the volumetric expansion of reactive shale formations remains a primary operational challenge in modern drilling engineering, causing severe mechanical failures and substantial economic deficits. The objective of this study is to formulate and evaluate a novel dual‐action chemical additive capable of ...
Ghaleb Oriquat   +8 more
wiley   +1 more source

Revisiting paravertebral muscles in European rabbits (Oryctolagus cuniculus) and European brown hares (Lepus europaeus) (Leporidae; Lagomorpha)

open access: yesThe Anatomical Record, EarlyView.
Abstract Domesticated European rabbits (Oryctolagus cuniculus) have long been chosen as laboratory model organisms. Despite this, there has been no definitive study of the vertebral musculature of wild rabbits. Relevant descriptions of well‐studied veterinary model mammals (such as dogs) are generally applicable, but not appropriate for a species ...
Nuttakorn Taewcharoen   +3 more
wiley   +1 more source

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

open access: yesThe Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

A Study on Strength and Deformation Behaviour of Jointed Rock Mass [PDF]

open access: yes, 2011
Rock, like soil, is sufficiently distinct from other engineering materials that the process of design in rock is very complex. In rock structures, the applied loads are often less significant than the forces deriving from redistribution of initial ...
Sahoo, Smrutirekha
core  

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