Deep copper ore mines in Poland have been struggling with seismic hazard since almost fifty years ago when the first rock burst occurred. Increasing exploitation depth and mined-out space make the mining conditions constrained and severe causing the seismic activity to grow substantially. Consequently, rock burst preventive activities have to be incorporated into mining technology to provide work safety. To date, the group winning blasting has posed the most commonly used preventive measure, so its efficiency in seismic energy reduction is of significant importance for the rock burst hazard mitigation. The more energy blasting works provoke to release the safer the work environment gets. The article aimed to assess the efficiency of such an energy reduction, which was approached in two ways. Firstly, the drop of energy and in turn its reduction efficiency was assessed simply using a percentage of provoked tremors’ energy and number. Next, the analysis employed passive seismic tomography results to find if provoked tremors took place in high-velocity zones. The analysis made it possible to verify the assumption that the more provoked energy occurs in such zones the more successful preventive blasting is.

自将近五十年前第一次岩石破裂发生以来，波兰的深铜矿山一直在遭受地震灾害的困扰。开采深度和开采空间的增加使开采条件受到限制和严峻，导致地震活动大幅增长。因此，必须将预防岩爆的活动纳入采矿技术中以提供工作安全。迄今为止，小组爆破已经提出了最常用的预防措施，因此其降低地震能量的效率对于缓解岩爆危险具有重要意义。进行更多的能量喷射工作可以释放出更安全的工作环境。该文章旨在评估这种节能的效率，有两种方法。首先，仅使用引起的震颤的能量和次数的百分比来评估能量的下降以及反过来降低能量的效率。接下来，该分析采用被动地震层析成像结果，以找出在高速区域是否发生了引发的震颤。通过该分析，可以验证这样的假设：在这样的区域中，激发的能量越多，预防性爆破就越成功。