A ROCKFALL OCCURRED ON THE 1ST NORTH MAINS IN THE #6 ENTRY (BELT) BETWEEN SPAD 14+70 & 15+40. THE FALL WAS IN THE PILLAR LINE AND WAS APPROXIMATELY 18X60X11. THE ROCKFALL WAS FOUND AT 12:14 AM AND IMMEDIATELY CALLED IN ON THE MSHA HOTLINE. NO ONE WAS INJURED DUE TO THE ACCIDENT (ROCKFALL).