FALL OF ROOF OR BACK at KenAmerican Resources Inc
A roof fall occurred in the 1 Main South, #6 entry, in the pillar line between crosscuts #6 and #7. The fall measured approx. 40' X 18' X 6'. The area was supported with 6' tension rebar bolts. An undetected slip was determined to be the cause of the fall.
U.S. Mine Safety and Health Administration