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Stability of
structural elements of underground shelters for the collective rescue of
mine workers
O.P. Krukovskyi1, V.V. Krukovska1, Y.O. Vynohradov2*
1Institute of Geotechnical Mechanics named
of the M.S. Polyakov of the National Academy of
Sciences of Ukraine, Dnipro, Ukraine
2Branch for Physics of Mining Processes of
the M.S. Poliakov Institute of Geotechnical
Mechanics the National Academy Sciences of Ukraine, Dnipro, Ukraine
*Corresponding author: e-mаil:
my_pochta_1r@ukr.net
Physical and technical
problems of mining production, 2023, (25), 80-91.
https://doi.org/10.37101/ftpgv25.01.007
full text (pdf)
ABSTRACT
Purpose. Development of a method of studying
the stability of structural elements of an underground shelter for the
collective rescue of mine workers.
Methods. The problem of
time-dependent deformation of a coal-rock mass with a mine, a collective
rescue shelter and their supporting elements was solved
using the finite element method.
Findings. A method of studying the
stability of structural elements of an underground shelter of collective
rescue has been developed. It
consists in creating a computer model of a rock mass with a roadway, a collective
rescue shelter and their support; numerical calculation of the stress field
and zones of inelastic deformations in rocks and support; analysis of the
concrete elements stability according to the maximum stresses and the
nature of deformation; analysis of the stability of near-contour rocks,
which are also one of the structural elements of underground structures,
based on minimum stresses.
For example, a
numerical model was created to study the stability
of structural elements of the underground shelter for collective rescue and
the roadway, supported with rock bolts and frames. The calculation of the
stress field in the coal-rock mass and supporting elements was performed. It is shown that
under the given mining and geological conditions, the use of rock bolts
allows to preserve the roadway and the rescue shelter in a stable
condition; the concrete wall between the shelter and the roadway withstands
a high load and does not collapse.
Originality. For the first time, it was
proposed to analyse the stability of the
structural elements of an underground shelter for the collective rescue of mine workers in two steps: analysis of the concrete
elements stability according to the maximum stresses and the nature of the
deformation; analysis of the near-contour rocks stability according to
minimum stresses.
Practical implications. The application of the
proposed method will allow at the design stage to investigate and increase
the stability of structural elements of underground collective rescue
shelters, thanks to which the level of safety of mine
workers will improve.
Keywords: stability analysis, supporting elements,
underground shelter, research method, numerical simulation
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