Avísenme cuando se presente un nuevo incidente de la MSHA en Mine No 4.
A ROOF FALL 16'3100'X5' IN THE BELT ENTRY OCCURRED SOME TIME BETWEEN 5-23-87 AND 5-25-87. THIS AREA HAS HAD A HISTORY OF BAD ROOF. THE ROOF WAS RE BOLTED AND CRIBS WERE BUILT TO SUPPORT THE TO P INBY AND OUTB2 FOR 70 FT.
RESIN GLUE USED3TO BOLT THE ROOFIN THIS MINE WAS NOT ALLOWED TO SET PROPERLY IN THAT IT WAS LEFT OUTSIDE OVER NIGHT AN EXPOSED TO LOW TEMPERTURE,THEN WAS INSIDE THE MINE AND WAS USED IMMEDIATE LY NOT ALLOWING3RESIN TO WARM TO MINE TEMPERATURE.
THE AREA TO BE 4INED WAS PROJECTED TO CLOSE TO A HOLLOW THE AREA WAS WET AND FRAGILE TOP WAS ENCOUNTERED IN THIS AREA THE HEADING WAS DROPPED AND WILL BE PICKED UP LATER WHEN BETTER CONDITIO NS ARE ENCOUNTE9ED
MUD SEAM ABOVE 9OOF BOLT WAS ENCOUTERED IN OFFSET FAN ENTRY.AREA CRIBBED OFF AND A FENCE WAS ERECTED TO KEEP WORKERS OUT OF AREA.