- 21. Geological and mining-engineering peculiarities of implementation of hydromechanical drilling principles
- (Content №1 2021)
- ... of wells by development and introduction of progressive methods and techniques. Methodology. Analysis of the peculiarities of the modernized hydromechanical drilling devices in terms of rock breaking is ...
- Created on 05 March 2021
- 22. Influence of particle geometry on the efficiency of operation of quasistatic and inertial disintegrators
- (Content №6 2020)
- ... in the length coefficient of ellipsoid-shaped particles from 1.5 to 4 units leads to the enhancement of breaking stresses from 1.7 to 12 times, compared to the case of smooth rolls. The analysis of the ...
- Created on 22 December 2020
- 23. Evaluation of stability of sides of quarries and dumps on the basis of a risk-oriented approach
- (Contens №4 2020)
- ... Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (3), 131-138. 13. Sobolev, V., Bilan, N., Dychkovskyi, R., Caseres Cabana, E., & Smolinski, A. (2020). Reasons for breaking of chemical ...
- Created on 30 August 2020
- 24. Predictability of a small-amplitude disturbance of coal seams in Western Donbas
- (Contens №4 2020)
- ... analysis. Findings. Such parameters of small-amplitude breakings as amplitudes, slope angles, and length of the disturbances have been geometrized within the fields of Stepova and Yuvileina mines ...
- Created on 30 August 2020
- 25. 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
- 26. Contens 02 2020
- (Contens №2 2020)
- ... А.V.Kurliak, О.O.Balakin.Evaluation of blast wave parameters within the near-explosion zone in the process of rock breaking with borehole charges 47 Geotechnical ...
- Created on 10 May 2020
- 27. Contens 01 2020
- (Content №1 2020)
- ... А. А. Yurchenko, I. O. Luts, V. V. Kovbasa.Mathematical model of heat processes in terms of gas-saturated rock breaking by means of shearers and tunneling machines 18 ...
- Created on 11 March 2020
- 28. Mathematical model of heat processes in terms of gas-saturated rock breaking by means of shearers and tunneling machines
- (Content №1 2020)
- ... heat processes while breaking gas-saturated rock mass using shearers and tunneling machines. Methodology. To achieve the objective, methods of physical and mathematical modeling have been applied ...
- Created on 10 March 2020
- 29. Results of testing and modelling the “drilling rig with hydraulic vibrator ‒ rock” system
- (Content №1 2020)
- ... it due to periodic growth, separation and collapsing of cavitational pockets, the pressure shock oscillations are realized in drilling mud. They are transformed into longitudinal vibrations of rock-breaking ...
- Created on 10 March 2020
- 30. Management of reproduction of current assets of machine-building enterprises of Ukraine
- (Economy and Management)
- ... methods: canonical and discriminatory analysis ‒ in developing a conceptual approach to managing the reproduction of current assets of a machine-building enterprise; grouping ‒ while breaking down the ...
- Created on 23 August 2019
- 31. Determination of drilling and blasting parameters considering the stress-strain state of rock ores
- (Mining)
- ... energy intensity factor for breaking ores onto the inclined exposure which considers the exposure dip while correcting drilling and blasting parameters. There are also offered calculated numerical limits ...
- Created on 08 March 2019
- 32. Investigation into crown stability at underground leaching of uranium ores
- (Mining)
- ... state of the rock massif on the technology of breaking uranium ores. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, pp. 11‒16. 6. NIGRI GUVZ KNU, 2012. Instructions for determining ...
- Created on 26 December 2018
- 33. Identification of material parameters for numerical simulation of the behavior of rocks under true triaxial conditions
- (Solid State Physics, Mineral Processing)
- ... [Accessed 24 October 2017]. 15. Sergienko, L. V., Gladkaya, E. V. and Molodetskyi, A. V., 2015. Analysis of coal breaking mechanism under the conditions modelling stress-and-strain state ...
- Created on 29 October 2018
- 34. Efficiency of preparation of mountain mass at careers of building materials
- (Geotechnical and mining mechanical engineering, machine building)
- ... Institute of Geotechnical Mechanics, NAS of Ukraine, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. Abstract: Purpose. To conduct an assessment of the effectiveness of rock breaking in a complex array ...
- Created on 27 August 2018
- 35. Expediency of application of the vertical concentrated charges to decrease losses of ore on a lying wall of deposits
- (Mining)
- ... The variant of caving system of ore and adjacent strata with downhole breaking of ore or combined by wells from drilling chambers and the vertical concentrated charges from a lying wall of a deposit is ...
- Created on 24 July 2017
- 36. Experimental study of the influence of crossing the disjunctive geological fault on thermal regime of underground gasifier
- (Mining)
- ... the impact of changes of the geological faults amplitude without breaking the continuity of coal seams and the temperature conditions of underground gasifier based on the experimental data during underground ...
- Created on 17 November 2016
- 37. Simulation modelling of stress field in the vicinity of the stope of orebody
- (Geotechnical and mining mechanical engineering, machine building)
- ... objects of undermined territories. Practical significance. When breaking rocks and minerals in the stope block of steeply dipping orebody, ef- ficiency of explosive charges increases, specific consumption ...
- Created on 04 August 2016
- 38. Analytical study of rock cutting mechatron vibration system by flat auger tools
- (Mining)
- ... – Красноярск: СФУ, 2012. – 300 с. 2. Borisov, K.I., 2012. The scientific method of evaluating the effectiveness of the dynamic processes of destruction of rocks during drilling modern tools of cutting-breaking ...
- Created on 04 August 2016
- 39. Study on thermal strength reduction of rock formation in the diamond core drilling process using pulse flushing mode
- (Mining)
- ... in the course of diamond core drilling using both the pulse and continuous flushing modes was carried out in the course of the research. Findings. The process of rock formation breaking in the course ...
- Created on 04 August 2016
- 40. Prospects for diamond content in Raygorodska strata of the Ukrainian shield
- (Geology)
- ... type of sedimentary and pyroclastic group of rock. Diamondiferous bedrock processed by breaking waves and its alluvial migration from the continental surface can be considered as a possible source of incoming ...
- Created on 02 April 2016