  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 explained by the blasting
works effects. With electronic detonators, it is possible to achieve a precise
delay time between the detonation of explosives in the individual blastholes
and mining faces. Within the framework of this paper, the analysis of
seismograms recorded during selected blasting works differing in applied
initiation systems, i.e. non-electric and electronic was carried out. It was
assumed that this approach may be treated as a new blasting method of rock
burst control in deep mines conditions or can be the basis for the modification
of the currently used method.
