The invention relates to a roadway-hole transient electromagnetic device and a measuring method. The roadway-hole transient electromagnetic device comprises a transmitting device and a receiving device, wherein the transmitting device and the receiving device are connected with a host, a drilled hole and a roadway serve as a whole, when measurement is carried out, the transmitting device and the receiving device are arranged in the roadway and the drilled hole respectively, the host controls the transmitting device and the receiving device to be in
time synchronization, and measurement is carried out on an abnormal body through a transient electromagnetic method. When measurement is carried out through the roadway-hole transient electromagnetic device, the roadway-hole transient electromagnetic device is closer to the abnormal body, influence caused by an artificial conductor on the roadway-hole transient electromagnetic device is low, and the
signal to
noise ratio is high; due to the fact that a transmitting coil is arranged in the roadway, compared with the narrow space of the drilled hole, the parameters such as the number of turns of the transmitting coil and the side length of the transmitting coil can be increased, the transmission
magnetic moment can be increased, and the coefficient of mutual induction is almost zero; influence of the
volume effect of roadway transient electromagnetic non-contact detection is effectively reduced; due to the fact that the design that a receiving coil with a plurality of components is adopted, the combination forms of the receiving coil can be multiple, and when the PCB receiving coil form is adopted, the effective receiving area can be effectively increased, the
radius of detection can be increased, information of geologic bodies, within a certain range, around the drilled hole can be effectively obtained, and precision of judgment of the abnormal body is improved.