Collapse of hardened block of cement
during operations to break it up
[Circumstances of the Incident]
On the day of the accident, the victim and
another worker had been trying to break
up a hardened block of cement inside
a cement-storage silo. As the surface of
the stored cement had become very hard,
workers were not able to ship cement
to the outside. The cylindrical block had
a diameter of 20 meters and a height of 24
meters. While workers have tried to break
it up, a large mass of cement, a
height of 7.5 meters, a width of 3.1 meters
and a length of 6.0 meters, suddenly collapsed.
The victim was buried under collapsing cement
and died of suffocation. Another worker
was also suffered a broken left ankle,
requiring an absence from work for 30 days.
The following can be considererd as the causes
of this accident.
1 A 7.5-meter-high section of the block
hardened cement suddenly fell from
slope of the block, as workers applied
hammers and poles to the base of the
to try to break it up.
2. No provisions were taken to use
belts or other safety measures to prevent
workers from being buried by cement
the block broke up.
[Type of business] Port cargo transportation [Type of accident] Collapse [Number of victims] One fatality and one injury requiring an
absence from work