THE INJURED WAS ENTERING THE MINE ON A 2 MAN DIESEL RIDE. AS HE TRAVELED DOWN THE SLOPE THE ENGINE DIED. AS HE RESTARTED THE ENGINE THE MANTRIP WAS PICKING UP SPEED. HE WAS PLANNING TO GEAR IT DOWN, BUT THE ENGINE DIED AGAIN. HE APPLIED THEBRAKES, BUT STATED THEY WOULD NOT HOLD. HE CONTINUED DOWN THE SLOPE AND STRUCK A PARKED LO-TRAC AT THE BOTTOM. WILL BE OFF 4-6 WKS. FRACUTRED RI