Industrial laboratory Diagnostics of materials,
Год журнала:
2024,
Номер
90(12), С. 16 - 26
Опубликована: Дек. 23, 2024
The
organic
carbon
content
is
one
of
the
marker
indicators
for
wastes
mining,
processing
and
combustion
coal,
which
reflect
quality
drilling
blasting
operations
carried
out
at
deposit,
enrichment
safety
gold
slag
waste
fly
ash.
article
presents
results
studies
on
establishing
scope
application
evaluating
metrological
characteristics
a
developed
analytical
procedure
determination
in
samples
solid
mineral
fuel
using
gravimetric
method.
applicability
rock
containing
pyrites,
as
well
completeness
extraction
coal
different
degrees
metamorphism
(brown,
hard
anthracite)
were
tested
thermogravimetric
analysis
with
mass
spectroscopic
detection
(TGA/MS),
allows
conducting
qualitative
volatile
substances
(water,
oxides
sulfur
carbon)
released
from
analyzed
under
influence
high
temperature.
measurement
range
confirmed
by
studying
real
specially
prepared
based
sequential
ashing
samples.
absence
systematic
bias
according
to
was
established
analyzing
attested
samples,
standard
sample
composition
(mudstone)
GSO
7223–96
(containing
no
10877–2017
(with
specified
content)
addition
method
dilution
certified
assigned
registration
number
FR.1.31.2023.46507
Federal
Information
Fund
Ensuring
Uniformity
Measurements.
prospects
characterize
matrix
reference
materials
required
constructing
calibration
express
infrared
analyzers
are
considered.
Water,
Год журнала:
2025,
Номер
17(2), С. 263 - 263
Опубликована: Янв. 18, 2025
Underground
reservoir
technology
in
coal
mines
enables
the
effective
storage
and
utilization
of
water
resources
disturbed
by
mining
activities.
Owing
to
effects
operations
extraction/injection
activities,
head
underground
reservoirs
fluctuates
dynamically.
The
total
bearing
capacity
a
pillar
dam
is
significantly
reduced
due
combined
overlying
rock
stress,
dynamic
static
pressures,
mining-induced
stresses,
which
are
critical
for
ensuring
safe
operation
reservoirs.
Based
on
correlation
between
different
heights
corresponding
pressures
dam,
custom-made
pressure
immersion
test
device
was
used
saturate
samples
under
various
conditions.
mechanical
deformation
failure
characteristics
fracture
propagation
patterns
conditions
were
studied
using
uniaxial
compression,
acoustic
emission
(AE),
three-dimensional
X-ray
microimaging.
results
indicated
that,
compared
with
dry
state,
peak
strain
water-immersed
increased
varying
degrees
increasing
pressure.
Additionally,
average
porosity
number
pores
diameters
range
0
150
μm
samples.
Under
influence
loading
water-saturated
damage
threshold
intensified
deformation,
failure,
within
samples,
mode
changed
from
tension
composite
tensile–shear
failure.
