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The seismic hazard in Polish copper mines has remained continuously at a high level, generating a relatively large number of accidents and negatively affecting the continuity of the exploitation process. To minimize the threat, a number of preventive actions are taken to reduce the ability of the rock mass to accumulate stresses, which should ultimately result in a reduction in the number and energy of seismic phenomena. Unfortunately, as previous experience shows, the effectiveness of preventive measures is sever...

Among different types of hazards associated with underground mining in Polish copper mines, one of the most dangerous is rock burst hazard. Having in mind that the depth of exploitation is getting deeper, this problem will likely get worse in the near future. This kind of hazard is connected inherently with seismic events. Controlled group blasting within a potentially unstable roof stratum is considered as an active method of rock burst prevention. A number of recorded seismic events can be clearly and directly e...