MINER COLLAPSED WHILE WALKING BETWEEN 2 PIECE OFHEAVY EQUIPMENT 911 WAS CALLED & CPR ADMIN. IMMEDIATELY EFFORTS OF ON SITE STAFF & EMERGENCY REPSONSES FAILED TO REVIVE. MINER WAS PRONOUNCED DE AD ON SITE. CORONER'S REPORT LISTS CAUSE OF DEATH AS: ACUTE MYOCARDIAL INFARCTION"" DUE TO ATHEROSCLEROTIC CORONARY ARTERY DISEAS