ABSTRACT
The calculations of bench blasting technical parameters for the each cut in extracted magnesite block have been done by normally usage formula and draw design of the drill and blast pattern. The well designed drill and blast technical parameters are basic requirement to achieve growing results by bench blasting process. First of all is concerned the very well values of fragmentation in primary rock breaking. The drilling and blasting operation but also the loading, hauling and transport mining
1 BLAST WORKS USING IN THE MAGNESITE MINE
In the Slovakia mining industry the raw magnesite extraction is very important since long years. On Slovakia territory there are about 10% of total world geological raw magnesite reserves with not only Slovak or EU but even with world wide importance. The magnesite extraction industry including mineral processing plant concentrates into the largest exploited deposit Jelšava (MikováDúbravský massive) with more than 75% verified magnesite reserves volume that has dominating position on the present mining industry. The important part of all mining production insures the SMZ, a. s. Jelšava (Slovak Magnesite Enterprise, Inc. Mining Company), that belong between to greatest main worldwide extractor (annually 1.2 million tons) and producers of various both ceramics and refractory products. Currently, it is on the fourth position with 7.4% share of world´s production of magnesite products.
