Results 131 to 140 of about 298,446 (259)

Optimization of cut‐hole layout under high in situ stress based on numerical simulation and field tests

Deep Underground Science and Engineering, EarlyView.
This study investigates the blast‐induced rock damage patterns under different cut‐hole layouts and ground stress conditions through numerical simulations and field tests. The findings in this study provide valuable insights for similar underground engineering applications.
Junjie Zhao, Diyuan Li, P. G. Ranjith, Xinxin Lü, Yanliang Li, Xiaoli Su   +5 more
wiley   +1 more source

Modeling and forecast of gas hydrate distribution in the Black Sea: main principles and approaches

Frontiers in Earth Science
Gas hydrates are prevalent in marine sediments in regions characterized by certain bathymetry, geomorphology, lithology, and physics (i.e., low temperature and high pressure conditions).
Volodymyr Iemelianov, Olena Ivanik, Olena Ivanik, Tamara Kukovska, Natalia Fedoronchuk, Natalia Fedoronchuk, Ihor Shuraiev, Eduard Petrushenko, Kateryna Hadiatska   +8 more
doaj   +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

Possible way of effective enrichment of the mixed ores [PDF]

, 2013
Викладено результати експериментальних досліджень, що дозволили розробити та рекомендувати до впровадження нові технічні рішення комплексної переробки змішаних (напівокислених) залізних руд з використанням екологічно безпечної технології магнітної ...
Bulah, A.V., Bulah, O.A., Shvets, M.V., Булах, А.В., Булах, О.А., Швец, М.В.   +5 more
core  

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Biomass‐derived hydrochars as eco‐friendly adsorbents for wastewater treatment applications

Environmental Progress &Sustainable Energy, EarlyView.
Abstract Emerging organic pollutants (EOPs), such as diethyl phthalate (DEP), bisphenol A (BPA), and methylene blue (MB), are only partially removed in conventional wastewater treatment plants. This study assesses hydrochars produced by hydrothermal carbonization (HTC) of spruce bark (SB), vine shoots (VSs), and wheat straw (WSs) for removing three ...
Emanuel Gheorghita Armanu, Sara Ribeirinho‐Soares, Christian Eberlein, Hermann J. Heipieper, Irina Volf, Olga C. Nunes, Olívia Salomé G. P. Soares   +6 more
wiley   +1 more source

The Geologic Features of the Occurrence of Copper in North America [PDF]

, 1933
Copper is of such widespread natural occurrence in North America and there are so few metal-mining districts that have not contributed to its production that it is obviously necessary in any brief general treatment of the geology of the copper deposits ...
Ransome, F. L.
core  

Ictal semiology in precuneus seizures: A systematic review

Epileptic Disorders, EarlyView.
Abstract Objective To evaluate the ictal semiology in seizures originating in the precuneus and to help guide seizure interpretation within the framework of presurgical evaluation. Methods This systematic review followed a Preferred Reporting Items for Systematic Reviews and Meta‐Analyses (PRISMA) and a Quality Assessment tool for Diagnostic Accuracy ...
Erika Ignatius, Liisa Metsähonkala, Henna Jonsson, Leena Lauronen, Päivi Nevalainen, Jukka Vanhanen, Juha Wilenius, Georg Zimmermann, Maria Peltola   +8 more
wiley   +1 more source

ON THE PROBLEM OF STUDYING PLACER MANIFESTATIONS WITH SMALL AND THIN GOLD IN THE NORTHERN BLACK SEA COAST OF UKRAINE

Геологія і корисні копалини Світового океану, 2019
The article is devoted to the urgent problem of studying objects with small and thin gold (STG) in loose deposits. In the literature, based on previously obtained data on the presence in the Cenozoic sedimentary sediments of southern Ukraine of samples ...
E.A. Sarvirov
doaj   +1 more source

Mechanisms of SCN2A loss of function do not predict presence or phenotype of epilepsy

Epilepsia, EarlyView.
Abstract Objective SCN2A loss‐of‐function (LoF) variants are associated with epilepsy (onset age ≥ 3 months), intellectual disability (ID), and autism spectrum disorder (ASD). Despite numerous identified variants and the description of phenotypic subgroups, relationships between Nav1.2 channel dysfunction and clinical phenotypes remain unclear.
Marsha Tan, Beatrice Southby Goad, Meagan Allen, Jill Rodda, Kay L. Richards, Simone L. Ardern‐Holmes, Daniel Bamborschke, Daniel Fritzen, Inna Hughes, Kate Riney, Ana Roche Martinez, Angelo Russo, Adriane Sinclair, Stefano Sartori, Marina Trivisano, Angela De Dominicis, Nicola Specchio, Rikke S. Møller, Ingrid E. Scheffer, Walid Fazeli, Markus Wolff, Steven Petrou, Katherine B. Howell, Géza Berecki   +23 more
wiley   +1 more source