AN INVESTIGATION REVEALED THAT THE EE WAS LEANING OVER A LONG-AIRDOX 488 SCOOP GETTING A BAG OF ROCK DUST WHEN A PIECE OF ROOF ROCK FELL FROM BETWEEN THE ROOF BOLTS STRIKING HIM ON THE HEAD & BACK. THE PIECE OF ROCK TOOK EE TO THE MINE FLOOR. ROCK WAS APPROX., 110 INCHES LONG BY 22"" WIDEBY 8""THICK. THE AREA WHERE THE EE WAS WORKING WAS 109 INCHES IN HEIGHT. ROCK WAS SLICK SIDED FOR