Dynamic analysis of airflow oscillations in inclined parallel roadways of coal mine ventilation systems
Physics of Fluids,
Год журнала:
2025,
Номер
37(3)
Опубликована: Март 1, 2025
In
coal
mining,
mine
ventilation
systems
are
susceptible
to
interference
from
high-concentration
gas,
which
may
induce
airflow
oscillations.
Investigating
these
mechanisms
is
critical
for
ensuring
safety.
Given
the
limited
research
on
oscillations
in
open-loop
systems,
this
study
comprehensively
examined
oscillation
behavior
such
systems.
We
established
control
equations
branch
developed
and
validated
a
numerical
analysis
method,
derived
patterns
during
downward
parallel
inclined
roadways,
analyzed
effects
of
initial
velocity
through
parametric
studies.
Additionally,
oscillatory
conditions
were
simulated.
The
results
indicated
that
increasing
reduced
frequency
duration.
At
velocities
0.35and
0.5
m/s,
reversal
occurred
branch;
at
0.65
observed,
while
no
significant
detected
approximately
1
m/s.
contrast,
roadway
inclination
angle
amplified
magnitude
extended
When
reached
30°,
both
branches
exhibited
multiple
fluctuations,
with
amplitudes
significantly
larger
than
those
observed
15°
20°.
These
findings
provide
insights
preventing
controlling
underground
oscillations,
ultimately
enhancing
Язык: Английский
A New Proportional-Integral-Derivative Automatic Control Method Complemented by Computational Fluid Dynamics for Gas Concentration in the Tunneling Face
Arabian Journal for Science and Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 18, 2025
Язык: Английский
Theoretical research and control measures of gas accumulation based on airflow oscillation model in the upper ventilation of parallel roadway
Journal of Wind Engineering and Industrial Aerodynamics,
Год журнала:
2025,
Номер
263, С. 106132 - 106132
Опубликована: Июнь 2, 2025
Язык: Английский
Resilience analysis of mine ventilation cyber-physical fusion system
The Journal of Supercomputing,
Год журнала:
2024,
Номер
81(1)
Опубликована: Окт. 22, 2024
Язык: Английский
Experimental and numerical analysis of high-pressure gas-driven rock particle impact and fragmentation rock technology
Physics of Fluids,
Год журнала:
2024,
Номер
36(12)
Опубликована: Дек. 1, 2024
Aiming
at
the
problems
of
fast
tool
wear
and
low
tunneling
efficiency
in
hard
rock
process,
a
granite
particle
impact
breaking
technology
is
proposed
to
mass
face
advance
reduce
wear.
By
simulating
process
breaking,
feasibility
verified.
The
velocity
new
surface
area
were
obtained
by
high-speed
camera
three-dimensional
scanner
test.
influence
factors
gas
pressure
quality
analyzed.
It
concluded
that
increasing
can
effectively
increase
failure
improve
effect.
Improving
particles
does
not
continuously
kinetic
energy.
When
product
energy
reaches
critical
value,
continuing
will
damage
effect
granite.
impacting
shows
linear
relationship
with
area.
Язык: Английский