EE AND A CO-WORKER WERE LOADING 1,000 FT OF 48"" CONVEYOR BELT ONTO A SUPPLY CAR ON THE MINE BENCH USING A IT-28 LOADER AND A WIRE ROPE. A LAP OF BELT HAD FALLEN OFF OF THE STACK. AS EE ATTEMPT ED TO PUT THE BELT BACK ON THE CAR HE FELT PAIN IN HIS LOWER ABDOMEN.