WHILE MANUALLY DECKING BLASTHOLES WITH A SHOVEL, THE EMPLOYEE STRAINED HIS LOWER BACK. THE MINE EQUIPMENT NORMALLY UTILIZED FOR DECKING/STEMMING BLASTHOLES WAS UNAVAILABLE FOR THIS SHIFT. TH E EMPLOYEE WAS INCOMPLIANCE WITH COMPANY AND MINE RULES AND REGULATIONS. THE ACCIDENT DID NOT INVOLVE MINE EQUIPMENT OR THE MINING SYSTEM. THE ACCIDENT DID NOT INVOLVE JOB SKILLS OR PROTECTI