A ROOF FALL OCCURRED ON UNIT 2 (004-0 MMU) IN THE #6 ENTRY AT THE 1035' STATION. HEIGHT 6.5', WIDTH 20' LENGTH 22'. WHILE OPERATING THE MINER AT THE FACE OF THE #6 ENTRY, THE MINER HAD CUT APP ROX 12 FEET WHEN A HORSEBACK PRESENT IN THE ROOFGAVE WAY CAUSING THE ROOF TO FALL FROM THE FACE OUT BY TO THE NEXT TO LAST ROW OF BOLTS. ROCK FELL ON THE MINER.