EMPLOYEE WAS WORKING WITH ANOTHER PERSON PLASTERING A RETURN STOPPING ON THE 20 WEST CONINUOUS MINER SECTION. THE MUD FOR PLASTERING WAS IN A FIVE GALLON CAN WITH THE LID CUT OFF. AS HE STUCK HIS HAND INTO THE BUCKET, HE LACERATED HIS LEFT FOREARM ON THE SHARP EDGE OF THE CUT-OFF LID. THE LACERATION REQUIRED SIX SUTURES.