- 41. The influence of the moisture on the physical and mechanical properties of the sandstone (Separate Unit “Kapitalna” coal mine”, Donbas)
- (Contens №2 2020)
- ... Originality. The empirical dependences of mechanical properties from gravimetric moisture capacity of the sandstone sample were determined on the basis of the experiments in the laboratory. The regression power function was obtained for stress limit and modulus of elasticity, and for the coefficient of lateral deformation it was logarithmic. The coefficient of lateral deformation at the time of the destruction of some wet samples exceeded theoretically acceptable value of 0.5. ...
- Created on 10 May 2020
- 42. Contens 01 2020
- (Content №1 2020)
- ... V. А. Mashchenko, О. Ye. Khomenko, V. P. Kvasnikov.Thermodynamic aspect of rock destruction 25 Solid State Physics, Mineral ...
- Created on 11 March 2020
- 43. Mathematical model of oscillations of a drill tool with a drill bit of cutting-scraping type
- (Content №1 2020)
- ... mode parameters will allow evaluating the level of wear of the rock destruction tool, as well as to predict the durability of the drill string elements. References. 1. Kapitaniak, M., Hamaneh ...
- Created on 10 March 2020
- 44. Thermodynamic aspect of rock destruction
- (Content №1 2020)
- ... waves. The possibility of estimating the degree of slow dynamic destruction by the Debye temperature is revealed. The mechanism of dissipation of internal energy on structural defects of the system, with ...
- Created on 10 March 2020
- 45. Results of testing and modelling the “drilling rig with hydraulic vibrator ‒ rock” system
- (Content №1 2020)
- ... tool with frequencies of 1‒20 kHz and values of vibration accelerations from 500 to 3200 g. At repeated impact of power impulses of the rock-breaking tool, the destruction of rock becomes fatigue. ...
- Created on 10 March 2020
- 46. Patterns of beryllium distribution in rocks of Central Kazakhstan
- (Contens №6 2019)
- ... SiO2 and K2O have higher average contents of Be compared to chemogenic ones. This indicates that the terrigenous rocks of the studied region are products of mechanical destruction of previously formed ...
- Created on 23 December 2019
- 47. Territorial planning of Lviv-Volyn coalfield: history and prospects
- (Economy and Management)
- ... destruction of landscapes in the Sokal district. Constructive geography and geoecology. Science Notes, (1), 200-207. 8. Pinder, V. F., & Popovych, V. V. (2017). Reclamation of waste heaps ...
- Created on 26 October 2019
- 48. Mathematical modeling in the calculation of reinforcing elements
- (Geotechnical and mining mechanical engineering, machine building)
- ... the hard stamp and an elastic plate interaction with cylindrical anisotropy. Simulation of contact interaction tasks in order to determine the processes of wear, strength, destruction and structures durability. ...
- Created on 26 October 2019
- 49. Approximate analytical model of rock thermal cyclical disintegration under convective cooling
- (Geotechnical and Mining Mechanical Engineering, Machine Building)
- ... of destruction time lag for various rocks are presented. It is shown that the efficiency of thermal cyclic decomposition depends on the type of rock. Originality. A new approximate analytical approach ...
- Created on 19 August 2019
- 50. Improving reliability of drill pipe by strengthening of thread connections of its elements
- (Geotechnical and Mining Mechanical Engineering, Machine Building)
- ... drill pipes, according to the authors, will decrease the number of cases of destruction of pipe constituents, which will contribute to decreasing repair and servicing time for drilling equipment, and will ...
- Created on 19 August 2019