EE WAS ASSISTING WITH THE ADVANCEMENT OF A ROOF BOLTER CABLE ON A POWER MOVE. HE WAS WALKING IN THE #6 ENTRY OBSERVING THE BOLTER CABLE AS IT WAS PULLED WITH A SCOOP WHEN SUDDENLY HE STEPPED IN A HOLE FALLING ON HIS LT. SIDE. THE MINE FLOOR IS SOFT, WHICH CAUSES IT TO BE UNEVEN ONCEEQUIPMENT HAS TRAVELED OVER IT. HE SOUGHT MEDICAL ATTENTION ON 1/28/02, DIAGNOSED WITH CONTUSION