WHILE THE MINER WAS DRIVING A CAT 769C (DUMP TRUCK) LOADED WITH STONES UP A HILL THE TRUCK STARTED TO LOSE POWER AND HE STOPPED, THEN THE THE DRIVER TRIED AGAIN TO CONTINUE, BUT THE ENGINE OF THE TRUCK STALLED. HE TRIED TO BACK IT UP AGAINST THE EMBANKMENT AND WHILE DOING SO, HE TURNED OVER TO THE SIDE.