EE WAS HELPING OTHERS LOAD 8"" X 8"" X 8' WOODEN POSTS FROM THE MINE FLOOR TO THE TOP OF A SCOOP CAR. AS HE WAS BENT OVER LIFTING A POST HE FELT A SUDDEN PAIN IN HIS LOWER BACK. THERE WAS NO IMP AIRMENT TO THE MINING OPERATION OR DAMAGE TO MINING EQUIPMENT. THE INJURY DID NOT INVOLVE ANY ASPECT OF COMPLIANCE, JOB SKILLS, MINER PROFICIENCY, TRAINING, ATTITUDE OR PPE. IMPROPER LIFTING