Application of Long-Distance Drilling and Blasting Technology to Prevent Rock Bursts in High-Level Roofs
Applied Sciences,
Год журнала:
2025,
Номер
15(4), С. 1821 - 1821
Опубликована: Фев. 11, 2025
In
view
of
the
high-level,
thick,
and
hard
roof
in
a
mine
Shaanxi,
it
is
difficult
for
existing
technology
to
solve
problem
frequent
rock
bursts,
which
are
caused
by
direct
weakening
whole
underground
layer.
this
paper,
preventing
bursts
using
long-distance
drilling
blasting
thick
high
field
proposed.
The
authors
used
theoretical
analyses,
numerical
simulations,
other
research
methods
analyze
mechanisms
pressure
relief
load
reduction
achieved
technology,
determined
its
layout
parameters
layers,
carried
out
engineering
practices
2412
working
faces
Shaanxi.
results
show
that
can
achieve
aim
unloading
drop
arranging
high-level
whole-layer
presplitting
above
face.
According
orthogonal
test
method,
when
under
condition
roof,
choice
layer
biggest
factor
affecting
change
overburden
subsidence.
Using
identification
basis
main
control
disaster
causing
overburden,
was
52~67
m
coal
seam
periodic
weighting
interval
face
development
radius
fractures
surrounding
rock,
blast
hole
spacing
be
30
m.
After
blasting,
frequency
energy
micro
seismic
events
were
reduced,
entry
deformation
reduced
compared
with
common
deep-hole
effect
better.
These
conclusions
provide
support
prevention
during
mining
production
similar
conditions
reducing
on
layers
unload
from
source.
Язык: Английский
Optimization Analysis of Advanced Support for Thick and Hard Roof
International Journal of Natural Resources and Environmental Studies,
Год журнала:
2025,
Номер
5(1), С. 73 - 80
Опубликована: Фев. 25, 2025
Based
on
the
geological
conditions
of
1033
working
face
in
Yuandian
No.1
Coal
Mine,
this
paper
studies
support
distance
and
strength
hydraulic
advanced
section
roadway
roof.
Through
numerical
simulation
analysis,
advance
range
is
5m,
10m,
15m,
20m
25m
four
kinds
plastic
zone
stress
cloud
diagram;
at
same
time,
in-depth
analysis
0.4
MPa,
0.8
1.2
MPa
1.6
these
five
different
strength.
above
research,
it
concluded
that
more
suitable
20
m,
~
MPa.
Язык: Английский
Post-Collapse Mine Rescue Using Ultra-Wide Band Radar: Electromagnetic-Wave Attenuation Mechanisms and Key Influencing Factors in Coal, Rock, and Stratified Composite Media
Process Safety and Environmental Protection,
Год журнала:
2025,
Номер
unknown, С. 107114 - 107114
Опубликована: Апрель 1, 2025
Язык: Английский
Study on Disaster Mechanism of Roadway Deformation and Roof Energy Accumulation in Advance Working Face
Geofluids,
Год журнала:
2025,
Номер
2025(1)
Опубликована: Янв. 1, 2025
It
is
one
of
the
important
disasters
faced
by
coal
mine
that
roof
energy
accumulation
leads
to
its
advance
failure
and
roadway
failure.
Identifying
position
can
predict
deformation,
so
as
take
preventive
measures.
Based
on
two
generalized
displacement
beams,
law
bending
moment
density
top
wall
under
different
loads,
thicknesses,
cantilever
lengths
investigated.
The
following
conclusions
are
drawn:
(1)
Under
load
conditions,
peak
both
appear
at
10
m
in
front
rapidly
decrease
0
after
reaching
no
longer
change.
value
increases
linearly
with
increase
load,
relation
M
=
−143.32
q
−
286.63.
changes
exponentially
U
e
200.46e
0.42
.
(2)
thickness
rock
layer
has
an
irregular
distribution
value.
When
12.5
15
m,
change
tends
be
consistent,
when
7.5
small
17.5
m.
less
than
smaller
is,
larger
more
advanced
is.
roof,
range
accumulation.
(3)
lengths,
length,
presents
a
linear
increase,
relationship
−158.22
L
+
137.4,
length.
With
exponentially,
3.5536
1.1067
,
lead
distance
increases.
(4)
stress
occurs
frequently
within
5–15
working
face,
which
well
confirms
correctness
theoretical
analysis.
Язык: Английский