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PARAMETERS OF DRILLING-AND-BLASTING OPERATIONS
FOR MINE WORKINGS CONSTRUCTION
M.M. Kononenko1*,
O.Ye. Khomenko1, Ye.O. Korobka2
1Dnipro University of Technology, Dnipro, Ukraine
2PJSC “Zaporizskyi Iron-Ore Plant”, Dniprorudne, Ukraine
*Corresponding
author: e-mail: kmn211179@gmail.com
Physical and
technical problems of mining production, 2021, (23), 54-71.
https://doi.org/10.37101/ftpgp23.01.004
full
text (pdf)
ABSTRACT
Purpose. Development
of a method for calculating the parameters of blasting works for mining,
considering the physical and mechanical properties of rocks, energy
characteristics of explosives (explosives), crack-mass of the massif and the action
of rock pressure.
Methods. The
paper uses a comprehensive methodological approach, which includes the development of methods for determining the parameters of the blasting works, considering the physical and mechanical properties of rocks and energy
characteristics of explosives, fracture of the array
and the action of rock
pressure.
Findings. A new
method of calculating the rational parameters of the blasting
works during the preparatory workings was developed, which laid down the
principle of placing groups of holes on
the areas they occupy in the bottom
of the workings and the location of holes on
the jack contours.
Originality. The
parameters of the location of boreholes in the bottom
of the mine are realized
according to the degree of change of
the line of least resistance
depending on the diameter of the borehole,
physical and mechanical properties of the rock
mass, energy characteristics of explosives and rock pressure.
Practical implications. The
use of a new method of calculating the rational parameters of the blasting works for workings
allows to save resources when performing tunneling work up to 18%.
Keywords: blast-hole, explosive,
drilling and blasting works, intensive crushing zone, line of least strength
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