In order to research geological structure prediction in driving working face, triangulation network interpolating method was used with many common interpolation algorithms to fit discontinuous coal seam (space) form under structure influence. On the basis of fitting seam floor shape, statistical analysis method in mathematical geology was applied to discover current abnormal measuring point in driving working face, together with taking drilling and geophysical prospecting results of distinguishing unusual existence authenticity as example. Meanwhile, mathematical model of recognizing various structures was established, expert discrimination empirical value was adopted according to structural feature and developing law analysis of existing area, coal field and well field, adjusting measures to local conditions to set parameters. The quantitative forecast of buried structures realized by anomaly detection and anomaly criteria provided reference to mining geologist with comprehensive assessment and forecasting about minor structure in mine.