EXAMINING TAILGATE AREA OF LONGWALL FOR POTENTIAL PROJECT INVOLVING INJECTION OF POLYURETHANE INTO ROOF. BROW JUST ABOVE COAL SEAL BROKE LOOSE INTO FACE AREA, BOUNCED OFF SHEAR & CAME BACK TO WALKWAY BETWEEN SHIELDS AND SPILL BOARDS. THIS ROCK STRUCK LEFT FOOT CAUSING A CONTUSION AND A LACERATION WHICH REQUIRED 5 STITCHES.