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Зараз показуються 31-40 з 56
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 ...
Substantiation of the method for constructing the diagram of the horizontal belt conveyor tightness
(National Mining University, 2017-09-30)
Purpose. The method for constructing the diagram of the conveyor belt tightness, which satisfies the fundamental conditions of the mechanical system equilibrium and takes into account the influence of its centrifugal forces ...
Shielded development of bottom gas hydrates
(National Mining University, 2017-09-30)
Purpose. The research aims to show the system features of the existing development methods, which create significant risks of investment in the production of methane gas hydrates, as well as to disclose a new way and ...
Optimization of blasting works during the destruction of masses with complex structure
(National Mining University, 2017-09-30)
Purpose. To study the quality of crushing rocks with different strength properties, depending on parameters of the charges location and the blasting time.
Methods. Based on the destruction of laboratory samples, histograms ...
Research into the influence of technical factors on rocks deformation during reworking of ore deposits
(National Mining University, 2017-09-30)
Purpose. The aim of this work is to establish the relation of rocks deformation during reworking of ore deposits to mining and technical conditions and factors of mineral production based on the processing of surveying ...
Selection of environmentally safe open-pit technology for mining water-bearing deposits
(National Mining University, 2017-09-30)
Purpose. Substantiation of environmentally acceptable technologies for surface mining of water-bearing placer deposits, taking into account the parameters of mining systems elements and areas damaged during mining of mineral ...
Gravitational and tectonic stresses in the rock mass and their determination by measurements in separate points
(National Mining University, 2017-09-30)
Purpose. Stress state in rock mass is the most important factor affecting processes around mine working. The methods used for calculation of stresses based on hypotheses of elastic thrust, hydrostatic state or spherical ...
Modeling of the power section of downhole screw motors
(National Mining University, 2017-09-30)
Purpose. Downhole screw motors (DSMs) are commonly used for drilling wells of various applications. The problem is to ensure reliable operation of DSM, particularly its power section “rotor – stator”. To evaluate its ...
Coalbed methane: places of origin, perspectives of extraction, alternative methods of transportation with the use of gas hydrate and nanotechnologies
(National Mining University, 2017-09-30)
Purpose. To investigate the main basic physical and chemical properties of coalbed methane (CBM), conditions of its formation and places of occurrence. Special attention is paid to CBM utilization using alternative methods ...
Scale factors for conversion of forces on disc cutters for the main domestic and foreign methods
(National Mining University, 2017-09-30)
Purpose. Disc cutter is an important tool which is used in tunneling to destroy the rock during excavation as it directly influences rock-breaking efficiency, advance rate and economy of a project. Thus, it is of critical ...