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The threat of seismic activity is an inherent part of the operation in each of the three mines owned by KGHM Polish Copper JSC. It results from the high compressive strength of the rock, the high depth of retreat, and the significant tectonic of the deposit as well as human mining activity. There is no complete elimination of this threat, but adequate prevention is used to limit it. Impacts on this threat also include operational indicators such as advancement or progress and pace of mining work. The progress is d...