Results 41 to 50 of about 1,389,592 (239)
GeoScience Engineering, 2012 Příspěvek se v úvodu zabývá použitím magnetitu při rozdružování těžného uhlí na úpravně Dolu Karviná, závodu Lazy, dále vyhodnocením kvality magnetitu používaného na úpravně, ztrátami magnetitu ulpívajícího na produktech odcházejících z úpravny ...
Pavlík Radim, Řepka Vlastimil
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Mechanical Properties and Consolidation Performances of High-Polymer Material in Coal
Energies, 2020 Roof collapse and wall spalling in mines commonly occurred. Grouting in the rock mass of a collapsed zone is one of the most effective technologies for solving this problem.
Yulong Chen, Yingchun Li
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Записки Горного института, 2021 Spontaneous combustion of coal remains an important problem for coal mines, which can lead to an explosion of methane and coal dust. Accidents associated with spontaneous combustion of coal can cause significant economic losses to coal mining companies ...
Vladimir P. Zubov, Dmitrii D. Golubev
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Tendencies of Coal Industry Development in Ukraine [PDF]
, 2017 Ukraine is a country with vast coal reserves of all grades. The estimated coal reserves in Ukraine are around 4% of the world coal reserves. We have three coal basins located on the territory of Ukraine: Donetsk, Lviv-Volyn and Dniprovsky.
Bondarenko, V.I. +2 more
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Research into the process of preparation of Ukrainian coal by the oil aggregation method [PDF]
, 2009 We conducted a study into concentration of Donetsk coal with varying degrees of coalification – anthracite and grade G – by the method of oil aggregation. We determined the character of impact of the following factors on the results of oil aggregation of
Biletskyi, V. S. +8 more
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Test study on impact resistance of hydraulic support based on energy-absorbing material
Meikuang AnquanThe application of energy-absorbing material on the top beam of the hydraulic support can effectively improve its impact resistance under instantaneous dynamic loading.
Shiwei LI +5 more
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INFLUENCE OF TECHNOLOGICAL FACTORS ON COAL MICROHARDNESS
Известия Томского политехнического университета: Инжиниринг георесурсов, 2019 A natural feature in changing hardness and strength of coals, their solid products of thermal processing and briquettes based on them is of great theoretical importance, because these parameters can indirectly characterize the properties associated with ...
Svetlana N. Saltykova +1 more
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Development of coal-feeding systems at the Morgantown Energy Research Center [PDF]
, 1977 Systems for feeding crushed and pulverized coal into coal conversion reactor vessels are described. Pneumatic methods for feeding pulverized coal, slurry feeders, and coal pumps, methods for steam pickup, and a method for drying a water-coal slurry in a ...
Hobday, J. M.
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Underground Coal Gasification Efficiency in Areas of High Faulting Frequency [PDF]
, 2017 The purpose of this paper is substantiating of efficiency during application of borehole underground coal gasification technology based on target coal seam geology.
Lozynskyi, Vasyl
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Environmental and Climate Dilemma: Coal for Heating or Clean Air for Breathing: A Case of Prishtina
Environmental and Climate Technologies, 2019 Air pollution as a global issue is an essential health problem, faced by millions of people all over the world. It is a huge problem encountered by the citizens of the city of Prishtina, too.
Bajcinovci Bujar
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