Results 111 to 120 of about 16,961 (284)
Fractural structure of thick hard roof stratum using long beam theory and numerical modeling
, 2017 The thick hard rock (THR) roof of the long-wall mining face is prone to the large-sized cantilever roof, and its sudden fracture will cause serious rock dynamic disasters, such as coal and gas outburst and rockburst. In this study, based on the long beam
Zhao, Tong +9 more
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Loss, persistence and reversal of phenotypic traits
Biological Reviews, EarlyView.ABSTRACT The irreversibility of complex trait loss has long been a tenet of evolutionary biology. However, this idea is increasingly at odds with the numerous documented exceptions across the Tree of Life. We synthesise this growing body of evidence across a diverse array of taxa and traits, exploring the evolutionary conditions that enable ...
Giobbe Forni +4 more
wiley +1 more source
, 2018 In mining excavation, the retained entry with stiff coal pillar is situated in the strong mine ground pressure. Influenced by mining abutment stress and dynamic stress (the vibration signal) induced from the hard roof activation, the retained entry may ...
Hua Nan +5 more
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Business Strategy and the Environment, EarlyView.ABSTRACT The present study applied the diffusion of innovation theory to investigate the rate of diffusion of renewable energy sources used by Europe's top professional football stadiums and the relationship with carbon neutrality. A discrete diffusion model estimated the diffusion of renewable energy to saturation, and a multivariate logistic ...
Chad S. Seifried +2 more
wiley +1 more source
International Journal of Mining Science and TechnologyGround hydraulic fracturing plays a crucial role in controlling the far-field hard roof, making it imperative to identify the most suitable target stratum for effective control.
Binwei Xia +4 more
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Influences on Pressure Releasing by Blasting Breaking Hard Roof [PDF]
Proceedings of the 8th Russian-Chinese Symposium "Coal in the 21st Century: Mining, Processing, Safety", 2016 Hu Shanchao +5 more
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Mechanism and prevention practice of rock burst in thick and hard roof
Meikuang Anquan, 2023 Based on the characteristics of thick hard roof and hard coal seam of rock burst mine in Ordos area, the occurrence process of rock burst under the condition of wide coal pillar mining was analyzed. It is revealed that the rock burst in this region is caused by the dynamic system instability in the high stress region of coal body, vibration, stress ...
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During fully mechanized caving mining of thick coal seams, a large amount of strain energy accumulates in the roof, especially when the roof is thick and hard, making it difficult for the roof to collapse naturally.
Jiting Liu +5 more
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Fueling Tomorrow: Scenario Planning for the Future of Gas Stations
Business Strategy and the Environment, EarlyView.ABSTRACT Transport electrification is reshaping the service infrastructures that mediate everyday mobility, yet most electrification scenario studies remain macrolevel and offer limited insight into how incumbent forecourt (gas‐station) networks can adapt under deep uncertainty.
Joao Gabriel Rosa +2 more
wiley +1 more source
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesPillarless mining plays a pivotal role in safeguarding and rehabilitating the ecological and geological aspects of mining environments. To improve the safety of hard roof cutting during pillarless mining operations, we have introduced a novel approach ...
Yong Li +4 more
doaj +1 more source