Results 91 to 100 of about 5,939 (298)

Elevated temperature effects on swelling pressure of compacted bentonite

Deep Underground Science and Engineering, EarlyView.
We present a set of new experimental investigations on the effects of elevated temperature on the swelling pressure development of compacted bentonite. This research was motivated by an emerging interest in using bentonite as a plug material in oil and gas well abandonment.
Linhua He, Majid Sedighi, Mojgan Hadi Mosleh, Andrey Jivkov, Jiangfeng Liu   +4 more
wiley   +1 more source

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

Deep 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, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

Fatores Hidrogeológicos no Estudo da Intrusão Salina em Aqüíferos Costeiros da Região Litorânea do Município de Maricá - RJ. [PDF]

Anuário do Instituto de Geociências, 2007
The oceanic area of Maricá, in the east coast of the Rio de Janeiro State, relies on groundwater as its mainsource of fresh water supply along with the use of water tank trucks. With the increasing demand of water resources,water supply and contamination
Ghislaine M. de Almeida, Gerson Cardoso da Silva Junior   +1 more
doaj  

Nonsilting transport characteristics of coal slurry in a deep underground fluidization conveying pipeline under the action of a guide vane swirler

Deep Underground Science and Engineering, EarlyView.
Aiming at the scientific frontiers of in situ fluidized mining of deep resources, a deep coal fluidized pipeline lifting system based on hydraulic conveying has been proposed. To solve the issue of particle sedimentation of large particles in horizontal connection sections, a solution involving the installation of guide vane‐type swirlers in the ...
Jiusheng Bao, Shaodi Zhao, Yan Yin, Zhongbin Wang, Shuai Liu, Shirong Ge   +5 more
wiley   +1 more source

Analysing Activities in a Classroom - Remembrances of Professor John Aitchison in Hong Kong with Applications to a Service Provider

Austrian Journal of Statistics, 2018
Compositional data analysis formed a main focus of statistical activities at Hong Kong University when Professor John Aitchison was head of the Statistics department.
Shirley Yvonne Coleman
doaj   +1 more source

Investigation on hard‐rock breaking performance and auxiliary mechanism of picks assisted with both‐sided high‐pressure water jets

Deep Underground Science and Engineering, EarlyView.
This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu, Jiancheng Xiao, Hui Zhou, Xiao Ma, Congcong Hou, Jian Cui, Fujian Yang   +6 more
wiley   +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

Deep 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, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

Precision Recognition of Rock Thin Section Images With Multi‐Head Self‐Attention Convolutional Neural Networks

Journal of Geophysical Research: Machine Learning and Computation
Lithological thin‐section image classification is crucial in geology. Traditional manual methods rely on expert experience, being subjective and time‐consuming.
Pengfei Lv, Weiying Chen, Xinyu Zou
doaj   +1 more source

I.—Geological Survey of Canada. A. P. Low, Deputy Head and Director. Report on the Geology and Natural Resources of the Area included in the North-West Quarter-Sheet, No. 122, of the Ontario and Quebec Series, comprising Portions of the Counties of Pontiac, Carleton, and Renfrew. By R. W. Ells. [With a Palæontological Appendix, by H. M. Ami.] 8vo; pp. 71, with map. Ottawa: S. E. Dawson, 1907. [PDF]

, 1908
A. H. F.
openalex   +1 more source

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

Deep 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, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source