INJURED HAD DRILLED A DEVELOPMENT ROUND. HE AND A FELLOW WORKER HAD HAND SCALED THE HANGING AND SIDEWALLS AND WERE CLEANING MUCK FROM THE BOTTOMHOLES PRIOR TO THE LOADING PROCESS. A SMALL SHAR P-EDGED PIECE OF LOOSE FELL FROM THE HANGING STRIKING INJURED ON THE RIGHT FOREARM CAUSING TWO CUTS WHICH REQUIRED TEN STICHES TO CLOSE.