Перегляд Mining of Mineral Deposits за датою
Зараз показуються 101-120 з 354
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Research іnto the mechanіsm of aggregate-formіng objects contact wіth oіl aggregatіon of fіnely-dіspersed coal
(National Mining University, 2017-12-30)Purpose. To investigate separate phases inherent to the process of “reagent – coal grain” contact during oil aggregation of coal, in particular, to analyze the following phases of the contact process: “encounter of ... -
Selection of gathering autotransport for the systems of cyclical-and-continious technology
(National Mining University, 2017-12-30)Purpose. Usage of technological gathering auto transport of the rational unit capacity and maximum level of consumer properties. Methods. Optimization of gathering auto transport equipment parameters, as well as rational ... -
Nuclear-and-fuel power industry of Ukraine: production, science, education
(National Mining University, 2017-12-30)Purpose. To define relevant problems and propose ways for development of production, scientific and educational spheres associated with nuclear-and-fuel power industry of Ukraine. Methods. The current state of uranium and ... -
Physical and chemical conditions for the formation of mercuric gold within Au-Hg deposits (thermodynamic modeling)
(National Mining University, 2017-12-30)Purpose. To carry out computer thermodynamic modeling of gold and mercury behaviour in the context of their common occurrence and formation of mercuric gold in hydrothermal solutions Cl– – HCO3– – Na+ and Cl– – Na+ – Ca2+ ... -
Problems of research and mining of gas deposits on the Moon
(National Mining University, 2017-12-30)Purpose. The study of the main types of the most valuable lunar resources, such as water, hydrogen, oxygen and other gases in the lunar regolith, and the identification of the main methods and technical solutions for their ... -
Damage to flexible pipes of coiled tubing equipment due to corrosion and fatigue: methods and approaches for evaluation
(National Mining University, 2017-12-30)Purpose. To propose an engineering approach for evaluating surface corrosion fatigue of flexible pipes of coiled tubing equipment, on the basis of the generalized data about corrosion fatigue behaviour of structural steels ... -
Formation of integrated energy efficiency indicator for mining industry companies
(National Mining University, 2017-12-30)Purpose. Justification of the principles for assessing the competitive status of Ukrainian mining companies’ energy efficiency as a derivative of electricity consumption and qualitative estimation of the companies’ competitive ... -
Experimental determination of angle values of the rocks full displacement when undermining them by breakage headings
(National Mining University, 2017-12-30)Purpose. Experimental determination of angle changes of full displacement of rocks by removing the breakage face from the face entry in different mining and geological conditions. Methods. On the basis of experimental ... -
Evaluation of some renewable energy technologies
(National Mining University, 2017-12-30)Purpose. The study aims to outline and compare various renewable energy alternatives in view of the global warming crisis and depletion of fossil fuels which cause emissions of carbon dioxide. Carbon dioxide is a major ... -
Study of the process of coal transfer by means of auger effector within the aggregate of boiling bed
(National Mining University, 2017-12-30)Purpose. The development and analysis of operation of a boiling bed aggregate with auger effector to feed and transfer coal inside a working chamber in the process of its thermal destruction. Methods. Method of graph ... -
Friction of flexible friction effect and general law on friction in operation of transport machines with flexible tie body
(National Mining University, 2017-12-30)Purpose. The justification of the new equation of friction of flexible bodies, which confirm the concepts of friction of bodies during operation of transport machines with flexible tie body. Methods. A comparison of the ... -
Development of a model of contact shoe brake-drum interaction in the context of a mine hoisting machine
(National Mining University, 2017-12-30)Purpose. To develop models of contact brake shoe-drum interaction of a mine hoisting machine while braking, taking into account final bending stiffness of a beam and the effect of friction forces on the distribution of a ... -
Strength and strain quantities under brittle compression process of hard rocks
(National Mining University, 2018-03-30)Purpose. To examine the relationships between strength properties and strain quantities associated with the brittle compression process of hard brittle rocks. Methods. The data used in this paper were obtained from ... -
Intensification of technological processes in drilling and blasting operations during open-cut mining in Kyzylkum region
(National Mining University, 2018-03-30)Purpose. It is found that for long term standing, the pit bench profile is close to the boundary of the disturbed zone. Therefore, long stability of the bench can be estimated in respect to the size of the disturbed area ... -
Exploration and mining evaluation system and price prediction of uranium resources
(National Mining University, 2018-03-30)Purpose. The paper introduces the development of the Uranium Resources Technical and Economic Evaluation Expert System (URTEEES) from the viewpoint of requirement analysis, system design, functional structure and application ... -
Improving the efficiency of blasting operations in mines with the help of emulsion explosives
(National Mining University, 2018-03-30)Purpose. To improve the efficiency of blasting operations in mines taking into consideration the upgrading of equipment used to charge blastholes as well as application of high-productive mining equipment of new ... -
Selecting the method of gas hydrate deposits development in terms of the regularities of their formation
(National Mining University, 2018-03-30)Purpose. To establish and show regularities of gas hydrates fields distribution in the World Ocean for the development of flow diagrams of methane extraction depending on genetic structures and the composition of the host ... -
Development of a research methodology and analysis of the stress state of a parting under the joint and downward mining of coal seams
(National Mining University, 2018-03-30)Purpose. The investigation of the stress-strain state (SSS) of a parting under the joint and downward mining of coal seams. Methods. The studies have been carried out on the basis of a computational experiment by means ... -
Hydro and geomechanical stability assessment of the bund wall bottom slope of the Dniprovsk tailing dump
(National Mining University, 2018-03-30)Purpose. The objective is to assess the stability of bund wall components of a hydro-technical structure under the conditions of a tailing dump which hydrodynamic mode has been disrupted during operation. The specified ... -
Simulation of the support-enclosing rock mass interaction for deep mining
(National Mining University, 2018-03-30)Purpose. To develop analytical model for a support-enclosing rock interaction to determine parameters for operational stability of deep mine workings while decreasing metal consumption and increasing efficient use of ...