Three-dimensional electromagnetic perspective exploration method for internal structure of underground coal mine working face

The invention discloses a three-dimensional electromagnetic perspective probing method for an internal structure of an underground coal mine working face, which comprises the following steps of: arranging drill holes into a broken line type, respectively arranging upper and lower rows of transmitting drill holes and receiving drill holes, and carrying out electromagnetic wave perspective probing according to a one-transmitting and multi-receiving mode to obtain perspective data; during three-dimensional observation data processing, a detected space is divided into grid units, electromagnetic wave rays penetrate through a plurality of grids from a transmitting point to a receiving point, and the length and the absorption attenuation coefficient of the rays in each grid are calculated; and based on the absorption attenuation coefficient, carrying out anomaly division by adopting a K-means clustering algorithm to realize three-dimensional exploration of the abnormal body in the working face. The abnormal body is