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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 ...
Nonlinear criteria and the influence of the average principal stress on rocks destruction
(National Mining University, 2018-12-30)
Purpose. Consider possible series methods of Mohr-Coulomb nonlinear criterion that takes into account stresses in the plane of fracture. Investigate the influence of the average principal stress on rocks destruction when ...
Review of man-made mineral formations accumulation and prospects of their developing in mining industrial regions in Ukraine
(National Mining University, 2019-03-30)
Purpose. Analysis of the man-made mineral formations of ore mining and smelting, fuel and energy complexes development accumulation, location and prospects amount in the Dnipropetrovsk region.
Methods. Comprehensive ...
Analysis of the efficiency of geomechanical model of mine working based on computational and field studies
(National Mining University, 2018-12-30)
Purpose is to substantiate the efficiency of geomechanical model of the mine working on the basis of qualitative and quantitative parameters of stress and strain state of the mine working and to compare the results of ...
Modelling of deep wells thermal modes
(National Mining University, 2019-03-30)
Purpose. Investigation of various heat-exchange conditions influence of the tower liquid on the deep wells thermal conditions.
Methods. Methods of heat-exchange processes mathematical modeling are used. On the basis of ...
Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming
(National Mining University, 2018-09-30)
Purpose. Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming for determination of transient temperature distribution along the borehole surface and the average coefficient ...
Simulation of sample testing under compression with the help of finite-element model of rocks being broken
(National Mining University, 2018-09-30)
Purpose of the paper is to develop mathematical model describing nature of argillous and salt samples under compression and to make available microdefects using finite-element method.
Methods. To simulate behaviour of ...
Ways to improve safety of a pumping-circulatory system of a drilling rig
(National Mining University, 2018-09-30)
Purpose. To modernize a pumping-circulatory system of a drilling rig in order to improve the environmental safety data, reliability, and convenience during oil well construction.
Methods. Methods of system analysis of the ...
Prospective tendencies of coal mining risk management
(National Mining University, 2019-03-30)
Purpose. The main purpose is to identify underground coal mining risks as well as approaches for their reasonable and efficient management taking into consideration internal production reserves in order to improve technological ...
Selection of accessing and development schemes for extracting reserves of ore body 2 in Irtysh deposit
(National Mining University, 2018-12-30)
Purpose. Justification and selection of a rational scheme for accessing the second ore body of the Irtysh deposit based on a technical and economic comparison of its adopted competitive options.
Methods. The main mining, ...