EE WAS LIFTING A ROTATING BUSH DEVICE ONTO THE MOUNTING MECHANISM OF A TRACTOR. THE TRACTOR WAS USED TO BRUSH DIRT OFF A ROADWAY. AS HE LIFTED THE BRUSH HE FELT PAIN IN HIS LOWER BACK & RIGHT HIP. THERE WAS NO DAMAGE OR IMPAIRMENT TO THE MINING OPERATION OR EQUIPMENT. THE JOB DID NOT INVOLVE COMPLIANCE, JOB SKILLS, PROFICIENCY, TRAINING, ATTITUDE, PROTECTIVE ITEMS OR PROTECTIVE DEV