Research on wave-field transformation and data processing of the mine transient electromagnetic method.

The detection accuracy of electrical interface by mine transient electromagnetic method (MTEM) affects the geological surveying results. Authors first discussed the theory of transient electromagnetic field transforming, proposed the algorithm of mine transient electromagnetic field transforming and calculated wave filed with actual surveying data, and then created the method of wave-field data processing and imaging, realized the transformation from mine transient electromagnetic section into pseudo-seismic section and accurate detection of the electrical interface. At last,the practicability and effective of the wave-field transforming and data processing were proved by the actual exploration on the water-containing of coal roof. The conclusion show that the wave-field transforming and pseudo-seismic imaging and data processing can extract the electrical interface information of MTEM and supplement the deficiencies of the MTEM on detecting accurately the electrical interface, highlight the weak anomalies and improve the resolution and increase exploration accuracy. [ABSTRACT FROM AUTHOR]