Results 41 to 50 of about 6,407 (264)

Review and prospects of shear test of bolted rock joints

open access: yesDeep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren   +4 more
wiley   +1 more source

Ornamental sandstones used in Ciudad Rodrigo, Salamanca: petrographic and chemical characterization of the quarry materials

open access: yesMateriales de Construccion, 2002
Petrographic and chemical study of the Ciudad Rodrigo (province of Salamanca, Spain) sandstones reveals the existence of several types of stone (Red, Brown, Striped, Nodular and White). To some extent all of them have been used in the construction of the
M. J. Varas, E. Molina, M. A. Vicente
doaj   +1 more source

Shear behavior of bolt–grout interfaces under constant normal stiffness: Influence of grout strength and thickness

open access: yesDeep Underground Science and Engineering, EarlyView.
The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang   +5 more
wiley   +1 more source

An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain

open access: yesMateriales de Construccion, 2002
The conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable.
F. García-Garmilla   +6 more
doaj   +1 more source

Generalized Matsuoka–Nakai criterion considering hydrostatic pressure dependence in the brittle–ductile region

open access: yesDeep Underground Science and Engineering, EarlyView.
Three sets of strength data were selected, including hydrostatic pressure independent within the brittle region (HPI‐B), hydrostatic pressure dependent within the brittle region (HPD‐B), and hydrostatic pressure dependent within the brittle–ductile region (HPD‐BD). For HPI type, the failure envelope within the deviatoric plane remains constant.
Jiacun Liu   +3 more
wiley   +1 more source

The Central Western Caucasus at the Jurassic–Cretaceous Transition: A Synthesis with a Case Study

open access: yesJournal of Marine Science and Engineering
The Caucasian Sea was among the vast tropical water masses that existed on Earth in the Mesozoic. The knowledge of Kimmeridgian–Hauterivian deposits from the central Western Caucasus can facilitate the understanding of the Caucasian paleogeography at the
Dmitry A. Ruban   +3 more
doaj   +1 more source

The role of polar organic components in dynamic crude oil adsorption on sandstones and carbonates

open access: yesCT&F Ciencia, Tecnología & Futuro, 2020
An appropriated wettability characterization is crucial for the successful implementation of waterflooding operations. Understanding how crude oil adsorption takes place on different mineral surfaces and how these processes impact reservoir wettability ...
Iván Darío Piñerez Torrijos   +3 more
doaj   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

open access: yesDeep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski   +4 more
wiley   +1 more source

Volume Density and Longitudinal Wave Velocity Changes of the Ciezkowice and Krosno Flysch Sandstones under High Pressure and Temperature in the Triaxial Test Condition / Zmiany Gestosci Objetosciowej I Predkosci Fali Podłuznej Skał Fliszowych: Piaskowców Ciezkowickich I Krosnienskich Pod Wpływem Wysokiego Cisnienia I Temperatury W Warunkach Trójosiowego Sciskania

open access: yesArchives of Civil Engineering, 2011
Gestosc objetosciowa skał oraz predkosc fal sprezystych sa stosowane do identyfikacji własciwosci i litologii skał na duzych, niedostepnych dla bezposrednich obserwacji głebokosciach.
Pinińska J., Dziedzic A.
doaj   +1 more source

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