The paper deals with the arrangement of mining and environmental monitoring at open-pit mineral deposits using electromagnetic geophysical method. The characteristic of the method of natural electromagnetic radiation (NEMR) discrete registration for searching geodynamically active faults to increase the safety of mining operations at ore deposits is given by the example of the apatite-nepheline deposit of the Khibiny rock massif.The existence of the dependence of the anomalous values of EMF in the Earth's pulse electromagnetic field on the stress-strain state of the massif on the basis of electrophysical phenomena occurring in the rock is substantiated.The efficiency of the method for search and mapping of geodynamic active faults is proved. The use of this method will improve in the future the effectiveness of measures taken to predict and prevent dangerous geodynamic phenomena.