Перегляд Mining of Mineral Deposits по назві
Зараз показуються 334-353 з 354
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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 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 ... -
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 ... -
Towards safer mining: the role of modelling software to find missing persons after a mine collapse
(National Mining University, 2018-06-30)Purpose. The purpose of the study is to apply science and technology to determine the most likely location of a container in which three miners were trapped after the Lily mine disaster. Following the collapse of the Crown ... -
Transportation of concentration and leaching tailings in underground mining of metal deposits
(National Mining University, 2019-06-30)Purpose. The article aims to substantiate efficient parameters of resource-saving technological processes ensuring optimal environmental and economic indices of concrete mixtures transportation under the force mode and ... -
Typomorphic characteristics of apatite morphology of carbonate-bearing variations of complex ores in the context of Kovdor deposit
(National Mining University, 2019-09-30)Purpose. A comprehensive analysis of apatite morphology in carbonate-bearing variations of complex ores in the context of Kovdor deposit as an important typomorphic characteristic of a mineral being of high genetic and ... -
Underground mining method assessment using decision-making techniques in a fuzzy environment: case study, Trepça mine, Kosovo
(National Mining University, 2020-09-30)Purpose. The purpose of this paper is to reevaluate the currently used underground mining method with the intention to verify if cut-and-fill stoping method is appropriate for deep future excavation mining levels > 800 m ... -
Underground monitoring as the best way of roadways support design validation in a long time period
(National Mining University, 2020-09-30)Purpose. The aim of this paper is to show the importance of geotechnical monitoring in assessing stability of an underground excavation. Every mining excavation is designed on the basis of limited geotechnical data and ... -
Use of alternative energy sources to improve the efficiency of natural gas hydrate technology for gas offshore deposits transportation
(National Mining University, 2018-06-30)Purpose. Justification of the principal schemes acceptable for the existing level of technology, methods of extraction and transportation of offshore natural gas deposits. Increase in their efficiency by maximum reduction ... -
Use of the energy of parametric oscillations to improve drilling indices
(National Mining University, 2018-09-30)Purpose. Increase of the efficiency of using energy of parametric oscillations within the assembly of drilling string bottom by means of solving nonlinear-parametric equations of a “bit – drive motor – drilled-out rock” ... -
Use of the TOPSIS technique to choose the best supplier of quarry natural aggregate
(National Mining University, 2020-03-30)Purpose. All over the world, natural substance – the most consumed after water – is the aggregate. The aim of this paper is to select the best supplier of Quarry Natural Aggregate (QNA). Methods. Selection of the best ... -
Use of thermal and magnetic devices for prevention of asphaltene, resin, and wax deposits on oil equipment surfaces
(National Mining University, 2019-06-30)Purpose. To substantiate the advantages of using a multi-level externally insulated complex of magneto-thermal dewaxing which is located in the oil well and improves production of the formation fluid with high content of ... -
Variations of physico-mechanical, mineralogical and geochemical properties of marble under the influence of weathering
(National Mining University, 2019-03-30)Purpose. To investigate the physico-mechanical, mineralogical and geochemical properties variations of Igbeti marble, south-western Nigeria under the influence of weathering. Methods. About twenty representative samples ...