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Intensification of
the use of mine rocks in backfill mixtures: environmental and technological
implications
M.V. Petlovanyi1*
1Dnipro University
of Technology, Dnipro, Ukraine
*Corresponding
author: e-mail: petlyovany@ukr.net
Physical and
technical problems of mining production, 2020, (22), 103-117.
https://doi.org/10.37101/ftpgp22.01.008
full
text (pdf)
ABSTRACT
Purpose. Increase of amount
of mine rocks utilization in backfill mixtures on the
basis of improvement of their properties and component composition
with assessment of technological and environmental consequences.
Methods. An experimental
program a complex of laboratory studies of the properties of the backfill
mixes of the traditional composition and with the high content of mine
rocks under the influence of fine binder is developed. A detailed analysis
of the waste heap passport and an assessment of its impact on the environment
in the conditions of one of the leading mining enterprises for underground
mining of iron ores is given.
Findings. Properties of
backfill mixtures with the content of mine rocks in the combined inert
filler of 25-50% have been prepared and determined. The rational interval
for the addition of mine rocks to the inert filler is determined. There is
a correlation between the time of dismantling of
the waste heap from the amount of rock in the inert
filler of backfill mixture.
Originality. The power dependence
of the change of the strength of the backfill massif on the volume of mine
empty rocks in the composition of the combined inert filler of the backfill
mixture is established.
Practical
implications. Compositions of backfill mixtures with high content of mine empty
rocks have been developed.
Keywords: mine rock,
backfill mixture, grinding, binder and inert material, natural environment.
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