TWO EMPLOYEES WERE BUILDING CRIBS IN LONGWALL BLEEDER ENTRY. A SECTION OF 6"" PLASTIC DEWATER LINE INSTALLED IN THE ENTRY FELL & STRUCK THE RIGHTSIDE OF VICTIM'S HARD HAT & RIGHT SHOULDER. THE WATER LINE FAILED FROM THE INADVERTENT INTRODUCTION OF HIGH PRESSURE INTO THE LINE FROM THE LONGWALL WATER PUMPS. EE WAS DIAGNOSED WITH SOFT TISSUE INJURIES TO HIS SHOULDER & RELEASED.