EE WAS OPERATING A SCOOP, CLEANING THE #5 ENTRY.HE DID NOT SEE A JOINT OF 4""PVC PIPE THAT HE PICKED UP IN THE SCOOP BUCKET. THE PIPE WAS CAUGHT BETWEEN THE RIB AND THE SCOOP BUCKET. WHEN HE MOVED FORWARD THE PIPE DISLODGED AND WENT INTO THE OPERATORS COMPARTMENT & STRUCK HIM IN THE RTFOREHEAD & EYE AREA. EE SUSTAINED A FRACTURE TO THE ORBIT OF HIS RIGHT EYE.