Перегляд Періодичні видання НТУ "Дніпровська політехніка" по назві
Зараз показуються 440-459 з 3493
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The impact of vibration mechanism’ installation place on the process of retrieving stuck drill pipe
(National Mining University, 2016-09-30)Purpose. The present paper studies the dependence of the dynamic oscillatory movements in the area of drill string sticking on the parameters of vibrating mechanism and place of its installation in the heavy weight drill ... -
The influence of reactive power compensation methods on the burning characteristics of shunted electric arc in an ore reduction furnace
(2024)Scientific novelty: Determined that with a fixed value of the power factor and the value of conductivity bc, it is very difficult to achieve ideal current resonance, and when bc = −⌂bl+bl+⌂blс the burning mode of the ... -
The influence of rigidity of the collapsed roof rocks in the mined-out space on the state of the preparatory mine workings
(National Mining University, 2019-06-30)Purpose. The substantiation of accounting the deformation-strength characteristics of the collapsed rocks and the rocks consolidating near the reusable preparatory mine working of the mined-out space to optimize the loading ... -
The investigation of heavy metal ion content in rock and coal production
(2013)Приведено олгляд методів визначення вмісту важких металів у вугіллі та продуктах вуглевидобутку. Виявлена доцільність використання НВЧ-поля та зниження температури озолення проб для підвищення точності визначення та зниження ... -
The octahedral concept and cubic triaxiality in assessment of secondary stress state
(National Mining University, 2020-03-30)Purpose. The opportunities offered by rock mechanics as a science are not fully and efficiently applied in the design and assessment of underground constructions performed in salt massifs, especially in the efficient design ... -
The procedure for determining pressure losses in washing fluid flow in hydraulic system of the core barrel
(National Mining University, 2017-03-30)Purpose. Development of calculation procedure and analysis of pressure losses in the flow of washing fluid circulating through a hydraulic system of the core barrel. Methods. Theoretical analysis based on the methods of ... -
The rate of deformation development in the rock massif on the basis of surveying monitoring on the earth surface
(National Mining University, 2017-03-30)Purpose. Basing on the instrumental surveying measurement, to determine the rate of tensile strain displacements in the rock mass, and to use the obtained data for controlling rock pressure and ensuring job safety. Methods. ... -
The results of magnetic separation use in ore processing of metalliferous raw basalt of Volyn region
(2016-09-30)Purpose. To determine the effectiveness of the electric field use in ore processing for extraction of native copper concentrate from raw basalt, to identify the most technologically advanced grain-size classes of the feed ... -
The role of limestone and dolomite tailings’ particle size in retention of heavy metals from liquid waste
(National Mining University, 2018-06-30)Purpose. The study aims at investigating the role of particle size of mineral tailings derived from limestone, limestone marble, dolomite and dolomitic marble in heavy metal adsorption, in both batch and fixed bed conditions, ... -
The role of means of individual protection for respiratory organs in prophilaxis of the coal-dust etiology
(2013)Розкрито питання пов’язані зі зниженням захворювань пилової етіології. Проведена оцінка захисної ефективності засобів індивідуального захисту органів дихання по вугільному пилу. Розраховано ризик захворювань пневмоконіозом ... -
The theory of flotation. Determination of sufficient time for flotation process, features
(Видавництво НГУ, 2019)Представлена концепція визначення достатнього часу процесу флотації у водному середовищі. -
The ways to enhance durability and bearing capacity of the open gear drum mills
(Dnipro University of Technology, 2021-09-30)Purpose is substantiating ways to enhance durability and bearing capacity of open gears of ore-pulverizing drum mills as well as efficiency of engineering solutions concerning the increase in their unit power at the expense ... -
Theoretical and geotechnological fundamentals for the development of natural and man-made resources of coal deposits
(National Mining University, 2016-12-30)Purpose. Theoretical and technological substantiation of parameters and schemes related to formation and use of natural and man-made volumetric and thermal resources of abandoned coal deposits using complex of geo-modules ... -
Theoretical background of rock failure at hydraulic seam fracture and aftereffect analysis
(National Mining University, 2018-09-30)Purpose. Theoretical substantiation of the methodological foundations of possible effects and aftereffects identification of the hydraulic seam fracture (HSF) technology. Methods. The research structure and procedure ... -
Theoretical basis for the formation of damaging factors during the coal aerosol explosion
(Dnipro University of Technology, 2021-12-30)Purpose. Assessing the process of damaging factors formation during the coal aerosol explosion in mine workings on the basis of theoretical research of the explosion of coal dust deposits in order to substantiate promising ... -
Theoretical foundations of point cloud coordinate system transformation
(2023)Purpose. To provide theoretical foundations and develop mathematical models for the efficient transformation of coordinate systems for point clouds in geophysical research; the scientific analysis is aimed at developing ... -
Thermal coal drying with the high volatile matter output
(2013)Наведено аналіз сучасних технологій сушіння вугілля з високим вмістом летких. Промислове застосування набули парові сушарки з киплячим шаром продуктивністю 55 т/год, в яких теплоносієм є інертний азот, а необхідне тепло ... -
Thermodynamic and geomechanical processes research in the development of gas hydrate deposits in the conditions of the Black Sea
(National Mining University, 2018-06-30)Purpose. Research of thermodynamic and geomechanical processes occurring in a gas hydrate body under the influence of an activating agent (sea water from surface layers) in the conditions of the Black Sea by mathematical ... -
Three-dimensional electromagnetic field model of an auger electromechanical converter with an external solid rotor
(National Mining University, 2019-12-30)Purpose. Creating a three-dimensional mathematical model of the electromagnetic field of an auger electromechanical converter with the external solid rotor, taking into account the geometry peculiarities and the finite ... -
Topical problems concerning both methods and economy to develop mineral deposits
(National Mining University, 2018-12-30)Purpose. Development of mining enterprises adaptation to changes in conjuncture of a product market relying upon its competitiveness while reducing expenditures connected with mineral stock extraction at the expense of ...