INJURED WAS POSITIONED UNDER A ROOF BOLT AND BESIDE ANOTHER 40 TON SINGLE PROP. THE PROP HE WAS DROPPING WAS 9 FEET AWAY. HE WAS USING A ROPE TO PULL THE HANDLE WITH. WHEN HE RELEASED THE SING LE PROP THE BOLT HE WAS UNDER SHEARED 21 INCHES FROM THE HEAD AND STRUCK HIS LEFT SHOULDER.