Abstract: In order to determine the characteristics of an abnormal area of three dimensional seismic reflection wave in Huainan Coal Field, fine interpretation was carried out to frame the space form, a ground borehole was drilled to detect rock mass composition, underground detection was used to ensure the mining safety. Karst collapse column comprehensive exploration technique was formed by these methods. Core analysis, expect formation comparative analysis, coal seam depth interpolation calculation and stratum evolution were applied to determine the characteristics. Study results show that the No. 3 column has characteristics including relatively normal stratum sequence, relatively complete rock mass, high degree of consolidation, no large disorderly rock mass or cavity.