Nadezhda Stoycheva, Petar Shishkov
ABSTRACT. Studies of foreign experience in the extraction of magmatic rocks for decorative and cladding purposes show a continuing trend for the use of high–speed explosives in the primary separation of the rock block from the massif. The belief that this is the cheapest way for primary extraction against the background of the prices for cutting of hard and highly abrasive rocks with diamond–rope, chain– and disk–stone cutters, makes quarry owners to put up with the losses from unwanted cracking of high–quality material. The authors undertook a series of experiments on samples of magma rock with hardness f = 16 according to Protodyakonov. The advantages and disadvantages of an alternative non–explosive technology for stone splitting with bulk–expanding mixtures were analysed. The results were compared with those using detonating cord charges to detach rock blocks with the same characteristics.
Key words: non–explosive stone splitting, bulk–expanding mixtures, smooth blasting, ornamental stone extrac
Stoycheva, N., P. Shishkov
COMPARATIVE ANALYSIS OF THE TECHNIQUES FOR DETACHMENT OF NATURAL STONE BLOCKS FROM THE MASSIF WITH FLEXIBLE HIGH-EXPLOSIVE CHARGES AND BULK-EXPANDING CHEMICAL COMPOSITIONS
DOI: 10.5281/zenodo.5594833
DOI: https://doi.org/10.58903/b15171920
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