Results 61 to 70 of about 146,439 (338)

Assessment of Design Procedures for Vertical Borehole Heat Exchangers [PDF]

open access: yes, 2015
The use of ground source energy systems is a well-established method to provide low cost heating to buildings, diversify the energy mix and help meeting increasingly stricter sustainability targets.
Keirstead, J, Sailer, E, Taborda, DMG
core  

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

open access: yesDeep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza   +3 more
wiley   +1 more source

Borehole MET-1/04 near Metlika, between the External and Internal Dinarides (SE Slovenia)

open access: yesGeologija, 2005
In the year 2004, a deep borehole MET/04 east of Metlika in Bela Krajina was drilled. It reached the depth of 841 meters. The aim of drilling was to catch thermal water that would be used for touristical purposes.
Marijan Poljak   +4 more
doaj  

Active-distributed temperature sensing to continuously quantify vertical flow in boreholes [PDF]

open access: yes, 2014
We show how a distributed borehole flowmeter can be created from armored Fiber Optic cables with the Active-Distributed Temperature Sensing (A-DTS) method.
Banks   +29 more
core   +5 more sources

A review on rockburst prediction and prevention to shape an ontology‐based framework for better decision‐making for underground excavations

open access: yesDeep Underground Science and Engineering, EarlyView.
A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan   +6 more
wiley   +1 more source

Recovery of Stress During the Interseismic Period Around the Seismogenic Fault of the 1995 Mw 6.9 Kobe Earthquake, Japan

open access: yesGeophysical Research Letters, 2018
We analyzed the current stress state on the Nojima Fault, the source of the 1995 Mw 6.9 Kobe (Japan) earthquake, using breakouts in a borehole through the fault to a depth of ~1,000 m in 2017. The main fault was found at a depth of 529.3 m, with a damage
Takafumi Nishiwaki   +2 more
doaj   +1 more source

System for detecting substructure microfractures and method therefore [PDF]

open access: yes, 1979
Bursts of signals at different frequencies are induced into substructure, adjacent to a borehole. The return signals from each burst of signals are normalized to compensate for the attenuation, experienced by more distant return signals.
Narasimhan, K. Y., Parthasarathy, S. P.
core   +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

The analysis used designs anchoring unit and designs of seals of packers used in the hydraulic fracturing

open access: yesНаука. Инновации. Технологии, 2022
The purpose of the packers is determined by the specific technological tasks. The design of the packer and the principle of bringing it into action shall provide protection from premature wear during the tripping process.
Viktor Alekseevich Mashkov   +4 more
doaj  

Temperature distributions in pavement and bridge slabs heated by using vertical ground-source heat pump systems - doi: 10.4025/actascitechnol.v35i4.15712

open access: yesActa Scientiarum: Technology, 2013
Temperature distribution which occurs in pavement and bridge slabs heated for de-icing and snow melting during cold periods is determined by using vertical ground-source heat pump (GSHP) systems with U-tube ground heat exchanger (GHE).
Asım Balbay, Mehmet Esen
doaj   +1 more source

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