EE & CO-WORKER WERE BUILDING A PERMANENT STOPPING. TO HELP WEDGE THE STOPPING, EE WAS SPLITTING A GLUT (LARGE WEDGE) WITH AN AXE. TWO CINDER BLOCKS WERE PLACED ON THE MINE FLOOR A FEW INCHES A PART. THE GLUT WAS PLACED ACROSS THE OPENING. WHEN THE GLUT WAS STRUCK BY THE AXE A PIECE OF THE GLUT FLEW UP & STRUCK EE'S FOREHEAD.