WE WERE RUNNING SOME WET MATERIAL THROUGH PLANT & FINES WERE STICKING IN CHUTE THAT FEEDS #64 BELT. EMPLOYEE CLIMBED UP ON TAIL PULLEY GUARD TO CLEAN CHUTE WITH SHOVEL AND SHOVEL GOT TANGLED UP IN BELT # 64. EMPLOYEE REACHED UP TO FREE SHOVEL AND GOT HAND IN RETURN ROLLER.