Seismic Effect Of Group Winning Blasting, Case Study From A Polish Copper Mine

Abstract

The group winning blasting is one of the most often applied method of high-energy tremors provoking in underground mines of the Lower Silesian Copper Basin. The simultaneous detonation of dozens mining faces are performed in order to release of elastic energy which is cumulated in surrounding rock mass. The accuracy of currently used non-electric initiation systems is insufficient to provide a controlled interference of seismic wave generated by blasting works. As a result, simultaneous detonation of higher number of mining faces does not always correlate with improvement of the effectiveness of rockburst prevention. In this paper, the records of seismic waves generated by blasting works in one of the mining panels from the Polish copper mine were analysed. The evaluation was performed by correlation of selected blasting parameters such as the number of fired mining faces and the total amount of detonated explosives with parameters of induced seismic wave