Results 111 to 120 of about 877,348 (312)
, 2022 Donor: Colorado Mining Association.A view showing a miner standing next to a mule that is harnessed to an ore cart, underground; Caption reads: "695.
Morris, Richard Bennett
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Deep Underground Science and Engineering, EarlyView.This research study employs analysis system (ANSYS) fluid–structure interaction simulations to investigate the generation and attenuation of vibration signals resulting from freezing pipe fractures in artificial ground freezing projects. By evaluating key variables—including frozen soil elastic modulus, brine inlet pressure, and external pipe pressure ...
Yi Cao, Yansen Wang, En Chen, Meng Zhao
wiley +1 more source
Spruce Mine, covering for later underground mining at the pit
, 2022 Date scanned: 2002-6-21.O-117; Poles and wire fence laid as "covering" for later underground mining. Spruce Mine, Oliver Iron Mining Company, Eveleth, Minnesota (Virginia-Eveleth District) - M. S. Petersen - July 1945.Held in the Russell L.
Petersen, Max S.
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Deep Underground Science and Engineering, EarlyView.Probabilistic natural gradient boosting and Gaussian process regression models accurately predict rate‐dependent rock strength across lithologies. Static strength and strain rate dominate, while geometric factors have minimal influence, enabling interpretable and uncertainty‐aware predictions for dynamic geomechanical applications. Abstract The dynamic
Hadi Fathipour‐Azar
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Miners underground, Kimberly mine
, 2022 Donor: Colorado Mining Association.Two mine wearing hardhats with lamps lean against an ore cart underground at the Kimberly mine.Caption reads: "Kimberly mine.
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Deep Underground Science and Engineering, EarlyView.The graphical abstract illustrates a reconstructed in situ thermo‐hydro‐mechanical (THM) framework in which porosity serves as the central variable linking stress, pore pressure, and temperature to evolving mechanical properties of rocks. Under burial conditions, in situ stress, pore pressure, and temperature jointly govern volumetric strain and ...
Mingyuan Lu +5 more
wiley +1 more source
Advances in Civil Engineering, 2018 The soil-rock mixture (S-RM) is widely applied in the geotechnical engineering due to its better mechanical properties. The shear strength, an essential aspect of S-RM which governs the stability and the deformation, is rather necessary to be revealed ...
Minghui Ren +4 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.This research proposes an interpretable hybrid stacking ensemble framework, optimized by the Sparrow Search Algorithm, to enhance hard rock pillar stability prediction. By integrating six machine learning models—k‐nearest neighbors, support vector machines, random forests, Gradient Boosting Decision Tree, eXtreme Gradient Boosting, and Light Gradient ...
Ning Wang +3 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.This study reveals the failure evolution characteristics of deep cross‐fault roadway surrounding rock under excavation support and periodic weighting. Periodic weighting readily induces fault activation, with the spatial distribution of failed rock masses being controlled by the fault strike and dip.
Tiezhu Li +4 more
wiley +1 more source
Miners underground, Los Ochos mine
, 2022 Donor: Colorado Mining Association.Five men standing at a stope, with equipment scattered around, underground at the Los Ochos uranium mine.Caption reads: "Los Ochos Mine, Gunnison Mng Co., 1959.
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