Department of Labor
Mine Safety and Health Administration
Roof Fall On Scoop
An unplanned roof fall occurred on April
20, 2002, at a District 8 mine. The fall partially covered a
battery-operated scoop that was located just inby the feeder on
the No. 3 Section. The scoop operator and helper were rock
dusting this area when a slickensided horseback fell. Four-foot
and six-foot fully grouted roof bolts supported this area and the
roof strata separated above the anchorage zone of the bolts. The
fall measured 18-feet wide, 7-feet high and extended 60 feet in
length. Protected by the canopy, the operator climbed out of the
scoop deck. Neither miner was injured as a result of the roof
Roof falls such as this prove the importance of
substantially constructed canopies or cabs on diesel-powered and
electric face equipment. Canopies and cabs provide the necessary
protection for miners that operate this type of equipment.
- Examine the roof frequently and thoroughly.
- Watch for changing roof conditions and communicate these
conditions to others.
- Drill test holes at least one foot longer than primary
support to help identify problems in roof strata.
- Notify your foreman, danger out the area, and correct
conditions immediately when adverse roof conditions are
- Install additional support, shorten cut depth, and narrow
entry width where slips, cracks, or other adverse roof or rib
This information was provided by concerned
miners in an effort to eliminate accidents. Accident or "close
call" information within District 8 may be shared by contacting
the MSHA office at (812) 882-7617.