Results 71 to 80 of about 2,797,649 (297)

Tectonic, depth, and magnitude controls on global earthquake stress drop

open access: yesSolid Earth Sciences
Earthquake stress drop is a key parameter linking fault strength, rupture dynamics, and high-frequency ground motion, yet global observations exhibit variability spanning more than two orders of magnitude.
Antonino D'Alessandro
doaj   +1 more source

Tectonic denudation and topographic development in the Spanish Sierra Nevada [PDF]

open access: yes, 2007
The denudation history of the rapidly uplifting western part of the Spanish Sierra Nevada was assessed using apatite fission track (AFT) ages and 10Be analyses of bedrock and fluvial sediments.
J. F. Shroder   +11 more
core   +1 more source

Failure characteristics analysis of the inclined interlayer during water‐soluble cavity construction of underground salt caverns for large‐scale energy storage

open access: yesDeep Underground Science and Engineering, EarlyView.
In the process of water‐soluble cavern construction of salt cavern energy storage, since the interlayer does not dissolve in water easily, sudden collapse will cause engineering accidents such as bending and damage of the inner tube of the cavern.
Zenghui Zhao   +5 more
wiley   +1 more source

Tectonic Stress Field in Central Europe

open access: yesAnnals of Geophysics, 1967
Sclieidegger's s t a t i s t i c a l method for the tectonic interp r e t a t i o n of e a r t h q u a k e f a u l t plane solutions is applied t o r e c e n t l y published solutions of e a r t h q u a k e s which occurred in two areas of Central Europe.
SCHEIDEGGER A. E., RANALLI G.
openaire   +3 more sources

Correlation between tectonic stress regimes and methane seepage on the western Svalbard margin [PDF]

open access: yes, 2018
Methane seepage occurs across the western Svalbard margin at water depths ranging from  1000 m in regions just a few kilometres from the mid-ocean ridges in the Fram Strait. The mechanisms controlling seepage remain elusive.
A. Plaza-Faverola   +5 more
core   +2 more sources

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

open access: yesDeep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand   +5 more
wiley   +1 more source

The depth of pseudotachylyte formation from detailed thermochronology and constraints on coseismic stress drop variability [PDF]

open access: yes, 2012
Pseudotachylytes are accepted as recording paleo-seismicity in the rock record. However, the interpretation of the mechanics of faulting based on pseudotachylyte generation is often hindered because the depth at which they form is poorly constrained ...
Stuart, F. M.   +5 more
core   +3 more sources

Effect of Deviatoric Stress on Deformation Energy of Tectonic Coal: A Modified Energy Model Considering Nonlinearity

open access: yesEnergy Science & Engineering
The deformation energy stored in soil‐like tectonic coal plays a critical role in coal and gas outbursts. Unlike hard rocks, tectonic coal exhibits pronounced stress–strain nonlinearity, invalidating traditional elastic energy models.
Chenghao Wang   +4 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

open access: yesDeep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li   +7 more
wiley   +1 more source

Study on mechanical properties and fractal evolution law of containing tectonic coal combination

open access: yesMeikuang Anquan
To study the mechanical properties of tectonic coal combination specimens, based on the occurrence characteristics of coal seam in a high gas mine, this study carried out the mechanical properties test experiment of loading and fracture process of ...
Qiudong SHAO   +6 more
doaj   +1 more source

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