FALL OF ROOF OR BACK at Armstrong Coal Company, Inc.
A roof fall occurred in the 2nd East Panel in the #1 entry in the intersection of spad number 8+00 measuring approximately 20ft. long x 17ft. wide x 8ft. high. This area was supported with 4ft. fully grouted roof bolts and 8ft. cable bolts.
U.S. Mine Safety and Health Administration