Abstract: In the front of excavation face, there exist abnormal geological structures such as fault, karst cave, collapsed pillars and aquifer, which usually bring about hazards like "pervious to water" and "roof fall" etc. How to accurately and effectively detect the geological structure in the front of excavation face has became a problem urgently needed to solve during production in coal mine. TYR (D) Rayleigh wave detector was adopted in advanced detection in driving face 7603 of Wuyang mine. The collected data were processed and analyzed, the conclusion is basically consistent with the engineering verification, thus obtaining good application effect.