Results 141 to 150 of about 877,348 (312)
Deep Underground Science and Engineering, EarlyView.This graphical abstract presents a hierarchical adaptive strategy for selecting rheological models in intelligent backfill pipeline transportation. Temperature, fly ash content, and water‐cement ratio jointly influence slurry rheological nonlinearity, which is quantified using the Model Fidelity Gain (ΔR2).
Defeng Wang +3 more
wiley +1 more source
Stope leaching reduces surface environmental impacts from underground mining [PDF]
"Conventional underground mining practices include excavating the ore and transporting the ore to the surface for processing. Underground mining systems handle tons of solid material to produce kilograms, and sometimes only grams, of final product ...
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Environmental Policy and Governance, EarlyView.ABSTRACT Global leadership in phasing out fossil fuels is an important new frontier in climate governance, yet remains undertheorised within existing scholarly accounts of climate leadership. In this paper, we argue that ‘phaseout leadership’—climate leadership centred on curtailing fossil fuel supply—is a distinct kind of leadership that dominant ...
Freddie Daley +2 more
wiley +1 more source
NIOSH Research for Monitoring and Controlling Methane at U.S. Underground Coal Mining Operations [PDF]
NIOSH research has focused on the monitoring and the control of methane levels in active mine workings. Response times for instrumentation using catalytic heat-of-combustion sensor technology were evaluated.
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Energy Science &Engineering, EarlyView.This study on close coal seams shows that multi‐seam mining increases the height of the fractured zone from approximately 26 m (single upper‐seam mining) to about 49 m. When the lower seam is mined after the extraction of the upper seam, the heights of both the caved zone and the fractured zone increase by approximately two times.
Xiaoyu Wu +4 more
wiley +1 more source
Energy Science &Engineering, EarlyView.Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley +1 more source
Overview Of Ground Control Research For Underground Coal Mines In The United States [PDF]
Underground coal mining continues to evolve in the U.S., and more reserves are being mined under deeper cover, with worse roof, or with interactions from previous workings.
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High Precision Prediction Model of Wind Speed for Underground Mine Tunnel by Using ASTF Net
Energy Science &Engineering, EarlyView.This paper proposes an Adaptive Spectral‐Temporal Fusion Net (ASTF‐Net), which features a novel decomposition‐ensemble framework with adaptive feature fusion. This design deliberately balances spectral and temporal features and effectively boosts prediction accuracy in complex ventilation environments. ABSTRACT An Adaptive Spectral‐Temporal Fusion Net (
Ruo‐Qi Li +4 more
wiley +1 more source
, 1976 The review focuses on changes that have taken place in various phases of underground mining in 1975, specifically in drilling, blasting, impact braking and scaling, moving materials underground, stoping methods, ground control, hydraulic backfilling ...
Bullock, Richard Lee
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Feminist Anthropology, EarlyView.Abstract When I was 12, my family told me a story about their community falling apart and coming together, a time when someone tried putting a nuclear facility in their (our?) hometown. Since we moved when I was too young to remember, the story had little significance until I embarked on a “hometown” ethnographic journey for my dissertation.
Chandler L. Classen
wiley +1 more source