Multi-face blasting is one of the most frequently used active rockburst prevention methods in the Polish copper mines. Simultaneous firing of a group of faces generates vibrations which, propagating in the form of para-seismic waves, affect the condition of the rock mass structure and allow to trigger high-energy tremors during the production process. However, the simultaneous firing of explosives in several mining faces may have the negative impact on the condition of the rockbolt support system in the roof strata and stability of the roof rocks located in the vicinity of the mining front. Therefore, this impact under the conditions of selected mining panels of the Lubin mine was examined by measuring the axial stresses in instrumented rockbolts. The statistical correlation between the measured axial stresses and the estimated para-seismic peak particle velocity has been analysed to determine the potential dependence between these quantities. The obtained results have shown that in the geologic and mining conditions of the analysed mining panels, simultaneous firing of explosives in a number of mining faces did not induce significant permanent changes in values of the measured axial stresses within the instrumented resin anchored rockbolts. In result, further development of multi-face blasting in terms of seismic wave amplification may be proceeded without risk of significant damaging of the immediate roof strata.

多面爆破是波兰铜矿最常用的主动岩爆预防方法之一。一组工作面同时点火会产生振动，这些振动以副地震波的形式传播，影响岩体结构的状况，并在生产过程中引发高能震动。然而，炸药在多个工作面同时点火可能会对顶板岩层中的锚杆支护系统的状况以及位于开采前沿附近的顶板岩石的稳定性产生负面影响。因此，通过测量仪器化锚杆的轴向应力，研究了 Lubin 矿选定采矿板条件下的这种影响。已分析测量的轴向应力和估计的平行地震峰值粒子速度之间的统计相关性，以确定这些量之间的潜在依赖性。获得的结果表明，在所分析的采矿板的地质和采矿条件下，在多个采矿工作面同时发射炸药不会引起测量的树脂锚固锚杆内轴向应力值的显着永久性变化。因此，可以在地震波放大方面进一步开发多面爆破，而不会有对直接屋顶地层造成重大破坏的风险。获得的结果表明，在所分析的采矿板的地质和采矿条件下，在多个采矿工作面同时发射炸药不会引起测量的树脂锚固锚杆内轴向应力值的显着永久性变化。因此，可以在地震波放大方面进一步开发多面爆破，而不会有对直接屋顶地层造成重大破坏的风险。获得的结果表明，在所分析的采矿板的地质和采矿条件下，在多个采矿工作面同时发射炸药不会引起测量的树脂锚固锚杆内轴向应力值的显着永久性变化。因此，可以在地震波放大方面进一步开发多面爆破，而不会有对直接顶板地层造成显着破坏的风险。