Results 71 to 80 of about 19,327 (253)
Deep Underground Science and Engineering, EarlyView.Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao +5 more
wiley +1 more source
CO-BEARING MINERALS IN ORES FROM THE MEDNORUDYANSKOE MALACHITE DEPOSIT (CENTRAL URALS) [PDF]
Минералогия, 2016 Cobaltite, Co-bearing pyrite, chalcopyrite and wad in ores from the Mednorudyanskoe deposit are characterized. Reserves of cobalt (about 3 000 t) were mainly concentrated in the Co-bearing hypogene minerals: pyrite and chalcopyrite with syngenetic ...
V.I. Popova, V.A. Kotlyarov, V.A. Popov
doaj
Deep Underground Science and Engineering, EarlyView.A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen +5 more
wiley +1 more source
TRACE ELEMENTS IN ZONAL OLIVINE OF BRONZE AGE METALLURGICAL SLAGS, SOUTH URALS [PDF]
Минералогия, 2018 Metallurgical artifacts including Cu-bearing slag fragments were found in the Bronze Age settlements of the South Urals. The slags from settlements of the Sintashta culture (Kamenny Ambar, Ustye and Sarym-Sakly) are mainly composed of olivine, magnetite ...
M.N. Ankushev +2 more
doaj
Deep Underground Science and Engineering, EarlyView.Our study reveals that caving‐enhanced geothermal systems (C‐EGS) with adequately fractured reservoirs achieve optimal heat extraction by minimizing preferential flow paths, while conventional fracturing (F‐EGS) and pipe‐based (P‐EGS) systems suffer accelerated thermal drawdown.
Fangchao Kang +4 more
wiley +1 more source
EXPERIMENTAL MELTING AND CRYSTALLIZATION OF ANDESITE OF BEZYMYANNY VOLCANO, KAMCHATKA [PDF]
Минералогия, 2017 Results of melting and crystallization of andesite from Bezymyanny volcano in Kamchatka at temperature of 1200–1300 °С and normal pressure are given. It is found that the structure of crystallization products of an andesite melt is distinct from natural ...
L.Y. Kabanova +2 more
doaj
CRYSTALLIZATION CONDITIONS OF OLIVINE IN DUNITES THE GULI MASSIF, SIBERIAN PLATFORM [PDF]
МинералогияCrystallization conditions of olivine in dunites of the Guli massif (Siberian Platform) are established using petrological, geochemical, mineralogical and thermobarogeochemical methods.
V.A. Simonov +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang +5 more
wiley +1 more source
SILVER MINERALS FROM QUARTZ VEINS OF THE KRASNOE DEPOSIT (BODAYBO ORE REGION) [PDF]
Минералогия, 2015 The paper characterizes silver tellurides, sulfotellurides and sulfosalts from the quartz-galena veins of the Krasnoe deposit (Bodaybo region), which is hosted by Upper Proterozoic carbonaceous clastic rocks.
E.E. Palenova +2 more
doaj
Carbonatite shows on the quartz deposits “Vein 175” (Ufalei block, the Southern Urals)
Литосфера, 2017 The subject of the study are manifestations of carbonatites in the quartz deposit “Vein № 175” - the largest deposit of granular quartz of Ufalei block in the Southern Urals.
Larisa Y. Kabanova +3 more
doaj +1 more source