Drilling & Blasting Optimal Parameters and the Results in the Dismemberment of Limestone in Volljak

Abstract

Considering discontents expressed by the companies who exploit limestone in some quarries in Volljak, aiming for better possible fragmentation of limestone, and having less output of large pieces and remain with as regular possible flooring. We have taken the intention to perform a test blasting in the said zone, with optimal parameters of drilling and blasting. We have included drilling & blasting parameters in the paperwork based on the calculation, based on experience and based on the results obtained in this area. After performing the massive blast, we obtained results that their demands can be achievable, because the outcome pieces from this blasting were minimal, not exceeding 3% of the blasted volume. After the loading and transportation of the blasting material, we can see that the remained floor has a very good flattened surface. In order to achieve these results, we have implemented connection of the field with detonating fuse, with millisecond deceleration between rows, and initiating the field with nonel connector and dynoline. With this initiating system we have obtained deceleration between rows with immediate initiation of one drilling row, thus we acquired a consumption of explosive material with optimal value for this area. This confirms that the mentioned demands are more of commercial nature, with intention of reducing the cost of drilling and blasting.