Forecast and precautions of rock strokes in underground pits

摘要

The system of regional and local forecast of stroke danger in underground pits of《Apatit》joint-stock company is described. Data about monitoring system for geological medium, created at apatite-nepheline pits in Khibiny an including several subsystems (stress and strain monitoring, seismic monitoring, control of massif seismicity, subsystem for registration of acoustic and electromagnetic emission) are presented. Wide material concerning complex of preventive technical and technological measures is given.