Results 21 to 30 of about 862 (178)

La transition énergétique offre-t-elle de nouvelles potentialités aux bassins d’exploitation du charbon et du lignite en Allemagne ?

Bulletin de l’Association de Géographes Français, 2016
Most coal and lignite basins in Germany have seen in recent decades a severe decline in their production. Only a few mines are still active, while most of the formerly exploited surfaces are under rehabilitation.
Michel Deshaies
doaj   +1 more source

Neighbourhood Change, Deprivation, Peripherality, and Ageing in the Yorkshire Coalfield

Social Inclusion
Low‐income neighbourhoods in contemporary England continue to be buffeted by roiling economic inequalities and social policy absences. Long‐term residents have a unique perspective on this socio‐spatial stress.
Andrew Wallace
doaj   +1 more source

Heat Recovery Potential and Hydrochemistry of Mine Water Discharges From Scotland’s Coalfields

Earth Science, Systems and Society, 2022
Prospective and operational mine water geothermal projects worldwide have faced challenges created by mine water chemistry (e.g., iron scaling, corrosion) and high expenditure costs (e.g., drilling or pumping costs) among others.
David B. Walls, David Banks, Tatyana Peshkur, Adrian J. Boyce, Neil M. Burnside   +4 more
doaj   +1 more source

Optimum mine dump design in Wardha Valley coalfields using finite difference numerical methods [PDF]

Analytical and Numerical Methods in Mining Engineering
The Wardha Valley coalfields are experiencing an acute shortage of dumping space for ongoing open-pit projects. This creates barriers to expanding the life of the projects and to developing the coal in greater depth.
Radhakanta Koner
doaj   +1 more source

Indian Coal Mines in Hundred Years Old Fiction and Now: A Geographical Analysis

Space and Culture, India, 2023
This study attempts to construe the first-ever coalmine-oriented Bengali fiction from a social, historical, and geographic perspective. Sailjananda Mukhopadhyay wrote Koylakuthi (the coal miners’ office) in 1922, representing Bengal’s coal mines.
Payel Ghosh
doaj   +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

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Dynamic geo‐hydrogeological monitoring‐driven situational awareness for real‐time floor water inrush risk prediction in deep mining

Deep Underground Science and Engineering, EarlyView.
The fused data extracted from the distributed monitoring system as the data basis, combined with dynamic geological data, are imported into a deep learning model. As the geological conditions of mining and excavation change, the risk of water inrush at the working face is retrieved in real time.
Yongjie Li, Huiyong Yin, Fangying Dong, Tao Wu, Chao Zhang   +4 more
wiley   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

Coal bursts that occur during development: A rock mechanics enigma

International Journal of Mining Science and Technology, 2018
Coal bursts are typically associated with highly stressed coal. Most bursts occur during retreat mining (longwall mining or pillar recovery) in highly stressed locations like the tailgate corner of the longwall panel.
Christopher Mark
doaj   +1 more source