UNINTENTIONAL ROOF FALL. FALL MEASURED 20' LONG X 18' WIDE X 40' HIGH. AREA MINED 2/22/06. NO INJURIES OR PROPERTY DAMAGE. ROOF PREVIOUSLY SUPPORTED WITH 6' TORQUE TENSION AND 6' DOUBLE LOCK BOLTS. ONLY ENTRANCE WAS DANGERED OFF AND BROW SUPPORTED WITH 3 CRIBS. FALL MOST LIKELY WILL NOT BE SUPPORTED OR CLEANED.
Employee was in a seated position operating a radio remote controlled continuous miner when a small piece of rock fell from the roof & rib and struck him on the back of his shoulder.
Employee was roof bolting #5 Entry. He was on the ""off side"" of the roof bolter in a squat position with the left knee on the mine floor and the right leg posed in a 90"" position. While beginning to drill the first hole a piece of rock being drilled fell from the roof, broke against the canopy, and struck the right knee.
INJURED WAS STRAIGHTENING A BENT ROOF BOLT WHEN THE ROOF BOLT SPUN AROUND STRIKING HIM ON LEFT WRIST CAUSING A FRACTURE.
ROOF FALL FROM LAST OPEN XCUT BETWEEN #5 & #6 TO LAST XCUT BETWEEN #8 TO #9 FALL 240' LONG, 8' HIGH.