- 1. Shallow tunnel face stability analysis using finite elements
- (Content №1 2021)
- ... face failure or excessive deformations with numerical methods resulting in more precise findings than analytical methods. Originality. The originality of this work is the use of both 2D and 3D modelling, ...
- Created on 05 March 2021
- 2. A deformation mode in a cold rolling condition to provide the necessary texture of the Ti-3Al-2.5V alloy
- (Content №1 2021)
- ... 2021, (1): 078 - 083 https://doi.org/10.33271/nvngu/2021-1/078 Abstract: Purpose. Providing deformation conditions in order to obtain the required texture of pipes made of Ti-3Al-2.5V alloy based on the ...
- Created on 05 March 2021
- 3. Mathematical modeling of the surface roughness of the grinding wheel during straightening
- (Content №1 2021)
- ... less elastic deformations in the wheel straightening tool system, which increases the accuracy of the geometric shape of the grinding wheel working surface. Findings. The research results make it possible ...
- Created on 05 March 2021
- 4. The method for determining the parameters of the diagrams of a truncated-wedge destruction of cylindrical samples of rocks
- (Content №1 2021)
- ... method for calculating the parameters of complete diagrams longitudinal tension deformation for the truncated-wedge shape of destruction of cylindrical rock samples to control the stress-strain state ...
- Created on 05 March 2021
- 5. Improvement of sub-level caving mining methods during high-grade iron ore mining
- (Content №1 2021)
- ... Analytical modeling of the backfill massif deformations around the chamber with mining depth increase. New Developments in Mining Engineering 2015, 265-269. https://doi.org/10.1201/b19901-47. 18.Khomenko, ...
- Created on 05 March 2021
- 6. Determining conditions of using draglines in single-tier internal dump formation
- (Content №6 2020)
- ... Buzylo, V., Pavlychenko, A., Borysovska, O., & Saveliev,D. (2019). Investigation of processes of rocks deformation and the earths surface subsidence during underground coal mining. E3S Web of Conferences, ...
- Created on 22 December 2020
- 7. Influence of particle geometry on the efficiency of operation of quasistatic and inertial disintegrators
- (Content №6 2020)
- ... 027 https://doi.org/10.33271/nvngu/2020-6/021 Abstract: Purpose. Research on interrelation of the efficiency of non-isometric particle destruction due to flexural deformation with the parameters of operational ...
- Created on 22 December 2020
- 8. Assessment of geotechnical properties of Draa El Mizane highway tunnel (Algeria)
- (Content №6 2020)
- ... Practical value. The values obtained by numerical modeling can give us a final decision for the support system chosen: values in terms of deformations in order of 1.5 cm at the top, 7.5 and 13.5 cm for ...
- Created on 22 December 2020
- 9. Justification of rational parameters for manufacturing pump housings made of fibroconcrete
- (Contens №5 2020)
- ... 2. Borisyuk, A. P., & Zyatyuk, Y. Y. (2016). Investigation of the deformation characteristics of steel fiber reinforced concrete. Bulletin of the Belarusian-Russian University, 3(52), 1-9. 3. ...
- Created on 30 October 2020
- 10. Maximum surface settlement induced by shallow tunneling in layered ground
- (Contens №5 2020)
- ... 4. Maji, V. B., & Adugna, A. (2016). Numerical modelling of tunnelling induced ground deformation and its control. International Journal of Mining and Geo-Engineering, 50(2), 183-188. https://dx.doi.org/10.22059/ijmge.2016.59827. ...
- Created on 30 October 2020
- 11. Testing of the complex for gravitational washing of sand
- (Contens №5 2020)
- ... of Mining Science and Practice. https://doi.org/10.1051/e3sconf/201910900056. 8. Nadutyi, V., Tytov, O., & Cheberiachko, I. (2018). Hereditary model of loose mined rock layer deformation in disintegrators. ...
- Created on 30 October 2020
- 12. Peculiarities of mining the protecting pillar in the laminal massif of soft rocks
- (Contens №5 2020)
- ... massif and rheological processes of creep deformations and stress relaxation of the rock massif. Numerical modelling and analysis of the stress-strain state of the massif are conducted. Conclusions are ...
- Created on 30 October 2020
- 13. Impact of water saturation effect on sedimentary rocks strength properties
- (Contens №4 2020)
- ... on water saturation, at which deformation processes are initiated: for light yellow loess loams – C = 17 kPa and j 14°; for yellow-brown dense loams – C = 29 kPa and j = 17°. Practical value. Correction ...
- Created on 30 August 2020
- 14. Study on the effect of plasticizers and thermoplastics on the strength and toughness of epoxy resins
- (Contens №4 2020)
- ... of macromolecules and make them more active. As a result, toughness increases; in certain cases, so does resistance due to directed re-orientation of macromolecules under deformation. The change in mechanical ...
- Created on 30 August 2020
- 15. Influence of mechanical and thermal treatments on microstructural transformations in cast irons and properties of synthesized diamond crystals
- (Contens №4 2020)
- ... temperature and deformation fields that ensure transformation of polymorphic graphite to diamond with emerging gradient stress fields at the stages of forging, exposure to shock waves and thermal cycling. ...
- Created on 30 August 2020
- 16. Evaluation of stability of sides of quarries and dumps on the basis of a risk-oriented approach
- (Contens №4 2020)
- ... for designing/redesigning deep open pits exemplified with the Kovdor deposit of magnetite and apatite ores. Bulletin of the Kola Science Center, 2, 19-29. 7. Instructions for monitoring the deformation ...
- Created on 30 August 2020
- 17. Development of an effective method for zoning the earth’s surface in heterogeneity of the rock mass
- (Contens №4 2020)
- ... geoenergy of the rock mass, determined by the difference between the sum of potential gravitational energies and elastic deformations of the rock mass in the initial and current states. Methodology. ...
- Created on 30 August 2020
- 18. The use of deforming broaching for enhancing the efficiency of cutter chisels
- (Contens №2 2020)
- ... Originality. It was determined that the range of angles of inclination of generatrix of the working cone of the deforming element and the roll-treading lip of the insert, which are necessary for efficient machining and pressing in crowns of cutters, is 4–16°. It was proven that the “solid alloy-steel” press couplings for cutter chisels will have the maximum bearing capacity at total tension a/d0 ≤ 3 %. It was found that it is necessary to foresee the following distribution of tensions: to perform 2 % of deformation by preliminary deforming broaching, and 1 % ‒ by pressing in an insert ...
- Created on 10 May 2020
- 19. Development and research of thеrmоplаstiс methods for hardening details
- (Contens №2 2020)
- ... Methodology. Experimental studies on the influence of the temperature factor on the hardening process were carried out at a specialized facility developed at the Department of Engineering and Woodworking Technology of CNUT (Chernihiv National University of Technology). The three-roller pneumatic device was mounted on a support of the lathe-screw machine model 1K62. Workpieces were mounted on a special mandrel in a three-jaw chuck. The spindle speed was set using an electronic tachometer; the pressure on the rollers was recorded by a pressure gauge. Before the rolling, the workpiece was kept in a laboratory electric furnace, the preheat temperature was recorded by a logometer. Since the surface quality of surface plastic deformation (SPD) treatment with heating depends on a large number of factors, a central second-order rotatable composite layout was used to obtain the multifactor model. On the basis of a priori information and the results of the previous experiments, the feed (S, mm/rev), pressure (P, H) and preheat temperature (T, °C) were taken as factors determining the process. The surface layer hardness was taken as the initial parameter. ...
- Created on 10 May 2020
- 20. The influence of the moisture on the physical and mechanical properties of the sandstone (Separate Unit “Kapitalna” coal mine”, Donbas)
- (Contens №2 2020)
- ... Methodology. Laboratory studies of a coefficient of moisture capacity of the rock, determination of strain characteristics and strength, identification of the modulus of deformation and Poisson’s ratio, statistical data processing based on correlation-regression analysis. ...
- Created on 10 May 2020