Modeling different-shape wedge penetration in rock mass under axial and spiral shock loading

The article presents the mathematical modeling and physical simulation data on symmetrical and asymmetrical wedge penetration in rock mass under shock loading along the axial and spiral trajectories. The comparative analysis of von Mises stresses in rock mass in the finite element modeling shows that under the shock loading of wedges (especially, asymmetrical wedges) along the spiral trajectory, the values of the shear stresses in rock mass increase. Physical simulation on a dedicated test bench proved the increased efficiency of shearing with the asymmetrical wedge penetrated in rock mass under the shock loading along the spiral trajectory. The comparison of the numerical values of energy inputs for fracture showed that the energy input for fracture with the asymmetrical wedge penetrated under the shock loading along the spiral trajectory were 1.5 times lower than with the symmetrical wedge and 1.45 times less than in the axial loading of wedges. This offers grounds for engineering appropriate rotary–percussive mechanisms and drilling tools.

Keywords: mathematical modeling, physical simulation, symmetrical wedge, asymmetrical wedge, axial shock trajectory, spiral shock trajectory, rock mass, shear, energy input for fracture.
For citation:

Sysoev N. I., Grinko A. A., Grinko D. A. Modeling different-shape wedge penetration in rock mass under axial and spiral shock loading. MIAB. Mining Inf. Anal. Bull. 2021;(6):120-132. [In Russ]. DOI: 10.25018/0236_1493_2021_6_0_120.

Acknowledgements:

The study was supported by the Russian Foundation for Basic Research, Project No. 19-35-90079.

Issue number: 6
Year: 2021
Page number: 120-132
ISBN: 0236-1493
UDK: 622.23.05
DOI: 10.25018/0236_1493_2021_6_0_120
Article receipt date: 23.11.2020
Date of review receipt: 09.03.2021
Date of the editorial board′s decision on the article′s publishing: 10.05.2021
About authors:

N.I. Sysoev1, Dr. Sci. (Eng.), Professor, e-mail: sysoevngmo@gmail.com,
A.A. Grinko1, Graduate Student, e-mail: nextdingo@mail.ru,
D.A. Grinko1, Cand. Sci. (Eng.), Assistant Professor, e-mail: dingo17@mail.ru,
1 M.I. Platov South-Russian State Polytechnic University (NPI), 346428, Novocherkassk, Russia.

 

For contacts:

A.A. Grinko, e-mail: nextdingo@mail.ru.

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