THE SERVICE HOIST CAGE WAS TRAVELLING EMPTY INTO THE MINE, WHEN SALT SCALE HIT THE OVERHEAD PROTECTION ABOVE THE MINE LANDING. IT BROKE A 2X6 BOARD WHICH FELL AND KNOCKED OPEN THE BOTTOM GAT E. THIS CAUSED THE CAGE TO SHUT DOWN AT 7:20 AM AND THE MINE WAS EVACUATED. THE CAGE WAS RESET, SHAFT INSPECTION AND HAND SCALING WAS COMPLETE BEFORE RETURN TO WORK UNDERGROUND 9:15 AM.