Results 71 to 80 of about 121,815 (293)

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  

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

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+3 more sources

Features of the application of a polymer casing in the constructon of production wells in underground leaching of uranium

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
A borehole underground leaching enterprise in the Khiagda ore body leads to the uranium mining at a depth of 90 - 300 m below the permafrost distribution zone.
A. G. Ivanov   +4 more
doaj   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

open access: yesDeep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang   +5 more
wiley   +1 more source

Spatial distribution of snow cover and temperature in the upper layer of a polythermal glacier

open access: yesЛëд и снег, 2017
The thermal regime of the upper layers of any glacier largely determines the thermal structure of its entire thickness. Its formation is influenced by both, external and internal factors and the most important one among them is the snow cover.
T. V. Vshivtseva, R. A. Chernov
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

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

open access: yesDeep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei   +4 more
wiley   +1 more source

Baseline Scotland : groundwater chemistry of the Carboniferous sedimentary aquifers of the Midland Valley [PDF]

open access: yes, 2011
This report describes the baseline groundwater chemistry of the sedimentary aquifers of Carboniferous age in the Midland Valley of Scotland. Groundwater is an important resource in the Midland Valley, largely for agriculture, but also for industry ...
Darling, W.G.   +4 more
core  

An investigation of the basement complex aquifer system in Lofa county, Liberia, for the purpose of siting boreholes [PDF]

open access: yes, 2014
Liberia is recovering from a 14 year civil war and only 51% of the rural population has access to safe drinking water. Little hydrogeological knowledge survives in Liberia, increasing the difficulty in successfully siting new boreholes.
Elster, D.   +3 more
core   +1 more source

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