Abstract: The space distribution characteristics of iron ore resource buried at depth can be figured out by comparing, calculating and analysing a large amount of drilling exploration data and relative geological data.By gyro-positioning ultrasonic imaging well logging technique, we can scan the well wall in a given direction even under magnetic shielding or magnetic interference.Then, a continuous plane graph can be gained.According to the strong and weak characteristics of ultrasonic echo signals in the graph, we can visually read orebody information about occurrence of iron ore bed (spacial form of orebody), thickness and integrity, and hydrological factors about the development status of surrounding rock karst and fractures.Its application in guiding mine exploration and exploitation can reduce exploration workload, decrease exploration cost and improve work efficiency, and therefore, it is of certain popularization value.

Key words: Gyro-positioning, Ultrasonic imaging, Mining area exploration, Experimental research