- 41. Forecast of methane emission from the undermined coalrock massif
- (Contens №4 2020)
- ... Mineev, S. P., Kocherga, V. M., Korneev, Yu. A., Yanzhula, O. S., Gulay, O. O., & Samopalenko, P. M. (2018). Research of the methan content effecting on gas-draine efficiency in the stope when boreholes ...
- Created on 30 August 2020
- 42. 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
- 43. 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
- 44. Mathematical model of oscillations of a drill tool with a drill bit of cutting-scraping type
- (Content №1 2020)
- ... & Sudakov, A.K. (2018). Drilling fluid circulation rate infuence on the contact temperature during borehole drilling. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (1), 35-43. https://doi.org/10.29202/nvngu/2018-1/14. ...
- Created on 10 March 2020
- 45. Vibration platform for forming large-sized reinforced concrete products
- (Geotechnical and mining mechanical engineering, machine building)
- ... 5. Solovjov, V. V., & Roy, N. N. (2015). Investigation of strain-stress state round the borehole massif containing the plastic rocks. Metallurgical and mining industry, (8), 555-558. 6. Chen, ...
- Created on 26 October 2019
- 46. Deformation of the long casing string on centralizers in the process of its installation in a horizontal well
- (Geotechnical and mining mechanical engineering, machine building)
- ... to increase its reliability and durability is considered. References. 1. Rachkevich, R. V. (2014). In-Plane Bending of a Drill String During its Compression in a Horizontal Borehole. Strength ...
- Created on 26 October 2019
- 47. Approximate analytical model of rock thermal cyclical disintegration under convective cooling
- (Geotechnical and Mining Mechanical Engineering, Machine Building)
- ... during thermal reaming of the borehole. InE3S Web of Conferences, 60, 00024. DOI: 10.1051/e3sconf/20186000024. 9. Zhang, А., Zhao, О., Hu, В., Skoczylas, А., & Shao, J. (2018). Laboratory ...
- Created on 19 August 2019
- 48. Improving reliability of drill pipe by strengthening of thread connections of its elements
- (Geotechnical and Mining Mechanical Engineering, Machine Building)
- ... increase the borehole drilling rate. References. 1. Lototska, О.І. (2008). Improving working properties of parts of polygraphic machines. Technology and Technique of Typography (Tekhnolohiia ...
- Created on 19 August 2019
- 49. Geo-energetics of Ukrainian crystalline shield
- (Mining)
- ... of borehole. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 5(155), 29-35. 11. Khomenko, O., Kononenko, M., & Bilegsaikhan, J. (2018). Classification of Theories about Rock Pressure. ...
- Created on 13 June 2019
- 50. Dependence of the drilling speed on the frictional forces on the cutters of the rock-cutting tool
- (Mining)
- ... displacements of the indenter along the surface of the rock has been improved. It is detailed with reference to drilling of boreholes with crowns of cutting type taking into account the reduced actual ...
- Created on 08 March 2019