Study on Overlying Strata Movement and Stress Distribution of Coal Mining Face with Unequal Thickness Bedrock
Processes,
Год журнала:
2025,
Номер
13(3), С. 752 - 752
Опубликована: Март 5, 2025
The
variation
in
roof
structure
induced
by
changes
bedrock
thickness
exerts
a
direct
influence
on
the
stress
distribution
within
lower
strata,
consequently
governing
stability
of
roadway
surrounding
rock.
To
investigate
impact
variations
overburden
fracture
behavior
and
evolution
deep-buried
thick
loose
layers,
numerical
simulation
model
an
unequal-thickness
working
face
was
developed
using
discrete
element
software.
This
utilized
to
conduct
systematic
investigation
into
characteristics
overburden,
displacement
characteristics,
during
mining
process.
results
demonstrate
that
as
advances
progressively
increases,
several
significant
occur:
caving
interval
immediate
extends;
degree
fragmentation,
overall
separation,
subsidence
rock
layer
above
goaf
gradually
diminish;
peak
at
shifts
deeper
coal
wall;
zone
expands.
Through
establishment
mechanical
key
formula
for
derived,
elucidating
mechanics
with
varying
thicknesses.
A
combined
support
measure
tailored
thicknesses
has
been
developed.
Practical
applications
have
demonstrated
technology’s
effectiveness
maintaining
stability,
offering
valuable
guidance
safe
efficient
operations
under
comparable
geological
conditions.
Язык: Английский
Study on deformation and failure mechanism of semi-coal rock soft rock roadway and reinforcement support countermeasures of anchor cable with c-shaped tube
Engineering Failure Analysis,
Год журнала:
2025,
Номер
unknown, С. 109708 - 109708
Опубликована: Май 1, 2025
Язык: Английский
Stress Evolution and Rock Burst Prevention in Triangle Coal Pillars under the Influence of Penetrating Faults: A Case Study
Applied Sciences,
Год журнала:
2024,
Номер
14(19), С. 8585 - 8585
Опубликована: Сен. 24, 2024
The
occurrence
of
rock
bursts
due
to
penetrating
faults
are
frequent
in
China,
thereby
limiting
the
safe
production
coal
mines.
Based
on
engineering
background
a
501
working
face
TB
mine,
this
paper
investigates
stress
and
energy
evolution
during
excavation
multiple
faults.
Utilizing
both
theoretical
analysis
numerical
simulations,
study
reveals
burst
mechanism
within
triangular
pillar
influenced
by
pillar,
index
has
been
devised
categorize
danger
regions
levels
risks
associated
with
pillar.
Furthermore,
targeted
relief
measures
proposed
for
various
accumulation
areas
results
demonstrate
that:
(1)
superimposed
tectonic
resulting
from
T6
T5
exhibits
asymmetric
distribution
an
influence
range
about
90
m
reaching
peak
value
11.21
MPa
at
distance
13
fault
plane;
(2)
affected
barrier
effect
faults,
abutment
is
concentrated
magnitude
positively
negatively
correlated
plane
width
respectively;
(3)
exponential
increase
as
decreases
leads
high
concentration
static
stress,
which
induces
under
disturbance
dynamic
activation;
(4)
simulation
shows
that
when
150
away
fault,
accumulated
triangle
begins
rise,
50
consistent
analysis;
(5)
constructed
indicates
moderate
its
between
73
200
m,
0
m.
pattern
separate
should
be
implemented
ranges
respectively,
order
enhance
effectiveness
relief.
Blasting
roof
proposed,
these
subsequently
verified.
Язык: Английский
Numerical Simulation and Engineering Application of Synergistic Support Effect of Bolt–Mesh–Cable Support in Gob-Side Entry of Deep Soft Coal Seam
Applied Sciences,
Год журнала:
2024,
Номер
14(18), С. 8226 - 8226
Опубликована: Сен. 12, 2024
Aiming
at
solving
the
problem
of
support
failure
caused
by
a
large
deformation
roadway
surrounding
rock
in
deep
soft
coal
seam,
and
taking
control
11-2
seam
Zhujidong
Coal
Mine
as
research
background,
numerical
simulation
field
industrial
test
inspection
methods
were
used
to
study
effect
supporting
system
gob-side
entry
seam.
The
characteristics
various
systems
metal
mesh,
diamond
mesh
with
anchor
rod,
steel
ladder
beam,
M-shaped
belt,
14#b
channel
steel,
11#
I-steel
goaf
body
studied
under
vertical
load.
effective
compressive
stress
zone
generated
bolt
cable
different
row
spacings
lengths
was
analyzed,
law
variation
members
parameters
explored.
length
interrow
distance
compared,
respectively,
reasonable
selected.
Based
on
abovementioned
results
geological
conditions
1331
(1)
track
roadway,
scheme
designed,
carried
out.
show
that
is
within
anchorage
range
body,
active
function
components
has
been
fully
brought
into
play,
overall
good,
which
can
ensure
safety
stability
roadway.
maximum
displacement
roof
floor
86
mm,
solid
side
50
pillar
70
separation
layers
22
mm.
There
no
phenomenon
relation
cable,
provide
some
references
for
roadway-surrounding-rock
similar
seams.
Язык: Английский