Abstract: Some phenomena that induced by hidden gob area was seriously menace for safety mining，which were about collapse，mine seismic, hazardous gas pour out，water disaster，fire disaster and so on，old mine mining data deletion was the most influence factor for gob management.Then gob area position，distribution scope and water could be explored high effectively and accurately with gob synthesize exploration technique，then shallow hidden gob area of one coal mine in Yulin city was explored by gob synthesize exploration technique，favourable results were obtained，it references for similar situation.