Results 121 to 130 of about 56,113 (309)

Modes of occurrence and origin of tungsten in the M3 coal seam of Neogene from the Puyang Coal Mine

open access: yesMeitan xuebao
Critical minerals in coal deposits have attracted much attention in recent years because of their potential economic significance. However, these critical minerals are becoming scarce and expensive as their resources in conventional ores are exhausted ...
Xingxing GUO   +4 more
doaj   +1 more source

Membrane tectonics [PDF]

open access: yesGeophysical Journal International, 1974
openaire   +1 more source

Tectonics

open access: yes
Tectonics is a series of geospatial investigations designed to augment existing middle school Earth science curriculum. Students use Web GIS to investigate important tectonics concepts.
Alec Bodzin
core  

Seismo-tectonics in Fennoscandia

open access: yes, 1980
Recent studies of seismic risk in Sweden indicate that there are connections between the epi-centres of earthquakes and the tectonics. On the basis of the existing data of seismicity and tectonics, eleven seismo-tectonic zones are suggested for ...
Stephansson, Ove, Carlsson, Hans,
core  

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

open access: yesDeep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia   +4 more
wiley   +1 more source

Probabilistic prediction of rate‐dependent rock strength using natural gradient boosting and Gaussian process regression

open access: yesDeep Underground Science and Engineering, EarlyView.
Probabilistic natural gradient boosting and Gaussian process regression models accurately predict rate‐dependent rock strength across lithologies. Static strength and strain rate dominate, while geometric factors have minimal influence, enabling interpretable and uncertainty‐aware predictions for dynamic geomechanical applications. Abstract The dynamic
Hadi Fathipour‐Azar
wiley   +1 more source

Tectonics of Long-span Structures

open access: yes, 2022
This seminar is about the tectonics of long-span structures. It covers tension and compression structures which have special forms, as well as triangulated structural systems.This seminar is about the tectonics of long-span structures.
Hurol, Yonca
core  

Rock mechanical properties under reconstructed deep in situ thermo–hydro–mechanical conditions: Implications for CO₂‐related injection scenarios

open access: yesDeep Underground Science and Engineering, EarlyView.
The graphical abstract illustrates a reconstructed in situ thermo‐hydro‐mechanical (THM) framework in which porosity serves as the central variable linking stress, pore pressure, and temperature to evolving mechanical properties of rocks. Under burial conditions, in situ stress, pore pressure, and temperature jointly govern volumetric strain and ...
Mingyuan Lu   +5 more
wiley   +1 more source

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