Experimental - Numerical study of the influence of radial air gapes in explosive charges on fragmentation in the working of rock

Shipovskii, I. E.; Trofimov, V. A.; Efremovtsev, N. N.

doi:10.1063/5.0163104

Cited by 1 publication

(4 citation statements)

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“…As the experience of calculations has shown, the method of smoothed particles is the most suitable for solving problems of mesomechanics, in which the processes of explosive destruction on the scale of the structure of the geomedium are considered [3][4][5][6][7][8][9][10][11]. The absence of a computational grid makes it possible to naturally calculate arbitrary rotational and shear displacements of the material, the decay of simply connected and the merging of multiply connected computational domains.…”

Section: Description Of the Simulationmentioning

confidence: 99%

“…Solution of the axisymmetric problem of the impact of an explosion of charges with air gaps [4] made it possible, in particular, to establish the effect of the gap between TNT explosive charges and the charging cavity on the yield of fractions less than 1 mm, as well as to reveal the nature of the change in the fine fraction yield with a change in the gap between the charge and the wall of the charging chamber and when replacing individual high-energy explosives with mixed compositions containing ammonium nitrate.…”

Section: Description Of the Simulationmentioning

confidence: 99%

“…An assessment was made of the influence of air gaps and well diameters on the uniformity of rock mass crushing [4,5].…”

Section: Description Of the Simulationmentioning

confidence: 99%

“…The research methodology is based on the combined use of computer modeling and experiments on compositional simulation models for calibrating numerical calculations. Simulation compositional models contain color-coded zones of explosion action at three levels by distance from the center of the charge and include inclusions of rock samples and crystalline raw materials [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Simulation of the Failure Localization for Rock Massive Under Rock Pressure Conditions During Explosive Mining with Charges of Industrial Explosives

Efremovtsev,

Shipovskii

2023

Rev. Adv. Mater. Technol.

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The complication of geomechanical conditions with an increase in the depth of field development requires improved calculations of drilling and blasting parameters based on studies of the patterns of changes in the stress-strain state and fragmentation of the blasted massif with an increase in rock pressure in various directions. This paper presents the results of studies of a section of a rock mass with a bare surface under conditions of flat deformation by the smoothed-particle hydrodynamics (SPH) method when blasting blasthole charges of sparing and crushing action. Regularities of change in time and space of the destruction zones of the massif and stresses with the formation of cracks as a result of the impact of an explosion in the presence of external pressure and in its absence are established. The results of calculations of the influence of physical and mechanical properties on the trigger effect of the destruction of the blasted rock are presented. To obtain preliminary estimates of the growth and branching of crack-like defects in real rocks under plane deformation conditions, numerical experiments were carried out. Diffraction patterns of fracture development on cracks filled with sand are obtained.

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