EE WAS WALKING IN XCUT L1-L2 WHILE OPERATING CONTINUOUS MINER BY RADIO REMOTE IN THE E-18 (022-0) SECTION. EE TRIPPED ON A EXTENDABLE LINE CANVAS FRAME AND FELL ONTO HIS LEFT KNEE. EE WAS WEAR ING KNEE PADS. EE RETURNED REGULAR DUTY WITHOUT MEDICAL TREATMENT FROM 02/08/00 THRU 02/18/00.