CMS applications in metal mines of China

Large numbers of cavities formed by underground mining endangers the mine´s safety seriously and generates much difficulty for the resource reclamation in domestic mines. Therefore, taking advanced Cavity Monitoring System (CMS) as basic mean, carrying out correlative technologies research and application to overcome these problems in the underground metal mines has become a significant task. The basic principle of CMS and the method of modeling cavities using monitoring data were introduced. The impacts to CMS probing result by temperature, humidity, target reflectivity and probing location etc were analyzed and some relevant resolved measures were brought forward. The research and application of CMS in China mine is introduced, which include cavity dynamic measure, stope collapse area dynamic monitoring, calculation of roof exposed area, cavity security management, mining index visible calculation, blast design of pillars with complicated irregular boundaries, as well as for the stope stability numerical simulation analysis based on the monitoring cavities and so on. All these techniques have been applied successfully in China mines.