Experimental Study on the Influence Mechanism of Injection Pressure on Water Seepage and Imbibition in Coal Pores
Опубликована: Янв. 1, 2025
Язык: Английский
Methane Adsorption Behaviors in Coal: New Insights into Functional Groups and Reaction Pathways
Energy & Fuels,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 19, 2025
Язык: Английский
Research on dust diffusion reduction-control technology of wind guide hood system based on an improved tunnel pressurized air system
The Science of The Total Environment,
Год журнала:
2025,
Номер
974, С. 178966 - 178966
Опубликована: Март 24, 2025
Язык: Английский
Anisotropic effective stress coefficient for permeability considering structural anisotropy of coal under true triaxial stress
Physics of Fluids,
Год журнала:
2025,
Номер
37(6)
Опубликована: Июнь 1, 2025
The
effective
stress
law
is
pivotal
in
examining
the
mechanical
behavior
and
seepage
variations
of
gas-bearing
coal,
as
well
addressing
fluid-solid
coupling
challenges
associated
with
deep
coal
rock
formations.
dynamic
evolution
coefficient
significantly
influences
deformation
characteristics
rock.
However,
traditional
triaxial
path
methodologies
fail
to
accurately
capture
actual
state
describe
anisotropic
variation
coefficient.
Consequently,
this
study
calculates
for
strain
(Biot's
coefficient)
under
hydrostatic
pressure
conditions
verifies
its
anisotropy
stemming
from
structural
coal.
Furthermore,
we
conducted
an
experimental
investigation
analyze
permeability
(κij)
various
combinations
true
pore
pressure,
considering
natural
structure
findings
revealed
that
κij
decreased
principal
increased.
As
rose,
fractures
were
compressed,
reducing
influence
on
subsequently
decreasing
κij;
increase
stress,
increased
fracture
areas,
heightened
sensitivity
bedding
cleat
planes
low
further
κij.
had
a
notable
impact
Higher
coefficients
observed
during
gas
flow
parallel
butt
cleat,
while
lower
values
noted
when
was
perpendicular
bedding,
aligning
variations.
Based
κij,
elastic
pores
stress-pore
coupling,
tortuosity
face,
cleats
fractures,
formulated
novel
model
characterized
by
stress.
This
effectively
correlated
results.
Язык: Английский
Microscopic investigation of gas flow characteristics in coal considering slippage effect
Physics of Fluids,
Год журнала:
2025,
Номер
37(6)
Опубликована: Июнь 1, 2025
Understanding
the
gas
flow
characteristics
within
coal
microscopic
pores
holds
crucial
importance
for
efficient
development
of
coalbed
methane.
However,
due
to
complexity
pore
structures
and
variability
pressures,
traditional
assumptions
fall
in
describing
slippage
effect
microscale
nanoscale
pores.
To
address
this
gap,
we
reconstructed
three-dimensional
architectures
from
computerized
tomography
images
established
numerical
models
under
slip
no-slip
regimes
incorporating
pressure-dependent
transport
mechanisms.
Systematic
comparisons
velocity
distributions
permeability
evolution
were
conducted
across
varying
pressure
conditions.
Additionally,
influence
microstructure
properties
on
migration
was
further
examined.
The
results
show
that:
(i)
relative
difference
between
gradually
decreases
as
increases.
two
at
channel
curve
is
obvious.
(ii)
values
regime
decrease
with
increase
pressure.
lower
pressure,
more
significant
effect.
(iii)
disparity
increasing
size
characterized
by
image
resolution.
apparent
exhibits
positive
correlations
porosity,
fractal
dimension,
average
coordination
number
while
demonstrating
a
negative
correlation
tortuosity.
Язык: Английский