While working underground at Bailey Mine's Reclaim Belt, employee slipped in mud while removing top platens of a sectional vulcanizing press injuring EE's left shoulder, arm, and knee. REPORT WAS NOT SENT WITHIN 10 DAY TIME FRAME DUE TO WAITING ON CLARIFICATION FROM EMPLOYEE'S PHYSICIAN WHETHER INJURY WAS PRE-EXISTING PRIOR TO INCIDENT OR PRESENTED NEW INJURY.