- 1. Koktaszhal ore field (Central Kazakhstan) research results
- (Contens №3 2020)
- ... Findings. The materials and their analysis obtained as a result of research significantly expand the idea of the ore field under study. The main ore-forming minerals are chalcopyrite and bornite, in much smaller amounts chalcosine, pyrite, and molybdenite are present in the ores. The main oxidized copper minerals in decreasing order are malachite, chrysocolla, chalcanthite, azurite. Thanks to detailed geological, mineralogical, petrographic, and laboratory studies, promising copper-porphyry ore occurrences have been identified. The aureole patterns are spatially combined and drawn up with the mapping of mineral concentrations on them, which are recommended to be studied in more detail. ...
- Created on 02 July 2020
- 2. Evaluation of blast wave parameters within the near-explosion zone in the process of rock breaking with borehole charges
- (Contens №2 2020)
- ... Originality. Methodology to evaluate blast-wave parameters within the zone near the borehole or blasthole charge explosion is proposed. Physical mechanism for rock breaking to ultradisperse particles is proposed. It has been specified that thermoelastic stresses may be one of the possible causes, if not the main one, of the rock breaking within the near-explosion zone. A mechanism stipulated by the transition of microstructure of the rock crystalline components to the instable state is considered as the alternative (or additional) factor. The cause is in the oversaturation of the rock microstructure with the linear and point defects. Exceeded value of critical concentration of those defects results in the excessive reserves of internal energy with the following spontaneous breaking of chemical bonds. Impact adiabats of coking coals of three grades as well as isentrope and impact adiabat of the detonation products of emulsion explosive ЕРА Р-3 are constructed. In terms of the “pressure – mass velocity of particles” coordinates, curves of adiabats of the bituminous coals differ by not more than 4 %. ...
- Created on 10 May 2020
- 3. Synthesizing models of nonlinear dynamic objects in concentration on the basis of Volterra-Laguerre structures
- (Contens №2 2020)
- ... Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (2): 30-36 https://doi.org/10.33271/nvngu/2020-2/030 повний текст / full article Abstract: Purpose. Enhancing energy efficiency and quality of automated control of the technological concentration line, increasing extraction of the useful component into concentrate while processing iron-bearing ores of various mineralogical and technological types through developing principles and approaches to distributed optimal control over interrelated processes in concentration production on the basis of the dynamic space-time model. ...
- Created on 10 May 2020
- 4. Contens 02 2020
- (Contens №2 2020)
- ... models of nonlinear dynamic objects in concentration on the basis of Volterra-Laguerre structures 30 L.I.Solonenko, O.Р.Bilyi, S.I.Repiakh, ...
- Created on 10 May 2020
- 5. Harmonization of results of modeling production systems of Ukraine’s regions
- (Content №1 2020)
- ... At the level of individual production systems, structural transformation aims to increase the efficiency of concentration of resources in subdivisions with higher returns. A prerequisite for the formation ...
- Created on 10 March 2020
- 6. Calculation of the volume of air for ventilation of mining workings when operating self-propelled diesel equipment
- (Contens №6 2019)
- ... (neutralization) of exhaust gases from automotive diesel emissions from engines which meet the environmental standard Tier III, field measurements on the magnitude of the carbon monoxide concentration ...
- Created on 23 December 2019
- 7. Leveling of pressure flow of radial ventilator in mine ventilation system
- (Contens №6 2019)
- ... 11.Kapalo, P., Vilčeková, S., Domnita, F., Bacotiu, C., & Voznyak, O. (2017). Determining the Ventilation Rate inside an Apartment House on the Basis of Measured Carbon Dioxide Concentrations ...
- Created on 23 December 2019
- 8. Physical and chemical transformations in gas coal samples influenced by the weak magnetic field
- (Contens №6 2019)
- ... Purpose. To study changes in the gas coal sample microstructure, the trends of changing iron concentration and thermal effects of chemical reactions stimulated by the pulsating magnetic field ...
- Created on 23 December 2019
- 9. The energy technological background of involving salty coals into energy balance of Ukraine. 2. Natural minerals as catalysts of thermochemical conversion of salty coals in various conditions
- (Contens №6 2019)
- ... as a separate fuel, while reducing the concentration of harmful impurities (by water extraction), and as a component of blended fuels to increase the reactivity of composite fuel raw materials. References. ...
- Created on 23 December 2019
- 10. Influence of chemical reagent complex on intensification of uranium well extraction
- (Contens №6 2019)
- ... Fe2+) concentration in the productive solution were determined in the case when they were affected by chemical multifunctional reagents. Originality. The method for intensification of uranium ...
- Created on 23 December 2019
- 11. Substantiating parameters of zeolite-smectite puff-stone washout and migration within an extraction chamber
- (Contens №6 2019)
- ... 21. Vasylchuk, O. (2018). Modeling the formation of high metal concentration zones in man-made deposits. Mining of Mineral Deposits, 12(2), 76-84. https://doi.org/10.15407/mining12.02.076. 22. ...
- Created on 23 December 2019
- 12. Patterns of beryllium distribution in rocks of Central Kazakhstan
- (Contens №6 2019)
- ... News of the Nat. Ac. of Sc. of the Rep. of Kazakh, (3), 81-116. 3. Glukhan, I. V., & Serykh, V. I. (2002). Average concentrations of elements in metamorphic rocks on Central Kazakhstan. Geokhimiya ...
- Created on 23 December 2019
- 13. Development of the Ukrainian coal basins as a socio-economic system
- (Economy and Management)
- ... Geological, geochemical and isotopic models of methane concentration in the Ukrainian coal basins. Scientific proceedings Faculty of Mechanical Engineering, (1-2), 90-101. 16. Kulish, V. (2015). Brown ...
- Created on 26 October 2019
- 14. Determination of stress in composite plates with cracks on the basis of the method of integral equations and solutions by Green
- (Geotechnical and mining mechanical engineering, machine building)
- ... Real Singular and Strongly Singular Integrals. Applied Mathematical Sciences, 10(3), 119-126. 5. Savruk, M. P., & Kazberuk, A. (2016). Stress Concentration at Notches. Springer. 6. ...
- Created on 26 October 2019
- 15. The main geological-industrial types of gold deposits in East Kazakhstan
- (Geology)
- ... geological-estimating and to operational exploration. Nowadays, up-to-date technologies of concentration, and development methods enable to refer these deposits to the objects of primary commercial exploitation. ...
- Created on 26 October 2019
- 16. Forecasting the aerogas state of mine atmosphere with application of artificial neural networks
- (Information technologies, systems analysis and administration)
- ... of a method for forecasting a highly dynamic process of changing the concentration of explosive gases in a mine using artificial neural networks that allow considering external factors. Nowadays, increase ...
- Created on 26 December 2018
- 17. Evaluating the risks of occupational respiratory diseases of coal mine workers
- (Environmental safety, labour protection)
- ... concentration being more than 20 mg/m3, dust respirators make it possible to provide only moderate degree of occupational disease risk. In this context, there is an excess in under-mask dust concentration ...
- Created on 26 December 2018
- 18. Non-kimberlitic sources of diamonds and prospects of their discovery in the ukrainian shield
- (Geology)
- ... Fluid-explosive formations also contain abnormal concentrations of noble metals. Practical value. The results of the research allow us to forecast the possible discovery of non-traditional diamond-prospective ...
- Created on 26 December 2018
- 19. Contents 05 2018
- (Contents №5 2018)
- ... O.O.Redko, V.P.Babak, V.S.Eremenko, V.M.Mokiychuk.Method of indirect measurement of oxygen concentration in the air 105 V.M.Shmandіy, O.V.Kharlamova, ...
- Created on 08 November 2018
- 20. Method of indirect measurement of oxygen concentration in the air
- (Environmental safety, labour protection)
- ... Kyiv, Ukraine Abstract: Purpose. Determination of a functional relationship between the oxygen concentration in the air and meteorological parameters (temperature, pressure, humidity) in ...
- Created on 29 October 2018