TRUCK DUMPED IN PRIMARY PLANT, RETURNING TO PIT TO BE LOADED. TRAVELED TO RIGHT SIDE OF HAUL ROAD ABOUT 1/2 WAY DOWN. WENT 75 YARDS TO BOTTOM OF GRADE. JUMPED A STONE PILE AT INTERSECTION TO R IGHT SIDE TURNED INTO BERM. CAB LAYED AT 45 DEGREE ANGLE ON LEFT SIDE OF CAB. MINER HAD LACERATIONS ON SCALP FROM HITTING CAB INTERIOR & COMPLAINED THAT BOTH SHOULDERS HURT. PARAMEDICS SAID H