Effect of cumulation on detonation velocity of low sensitivity explosives

• Autorzy: Mollova Zdravka

Identyfikatory

DOI

10.37190/msc233011

• Języki publikacji: EN

Abstrakty

EN

In an effort to improve the parameters of the blasting works carried out with low-sensitivity explosives, bearing in mind the studies of the cumulation phenomenon and the modern knowledge of the concentration of energy in a certain direction or place, studies of the detonation speed at different diameters of the charge of the coarse explosives were carried out – Anfo type with intermediate detonator 900 g cast booster with and without cumulative funnel (CF). Tests carried out in landfills and industrial conditions have shown that the type of intermediate detonator significantly affects the detonation speed, and therefore also affects the other explosive characteristics of the explosives. The highest detonation velocity was achieved when the explosives were initiated with cast boosters with cumulative funnels. Tests have shown that when initiating coarse explosives with boosters with CF, stable detonation of the charges is obtained with optimal fragmentation of the material, and the mass of the used explosives is reduced by 14%. Their use in carrying out blasting works with low-sensitivity explosives of the emulsion and coarse-disperse type leads to an increase in the blasting efficiency, achieving better crushing of the rocks and reducing the costs of additional crushing of the non-gauge.

Słowa kluczowe

EN

velocity of detonation; booster; conical shaped charge; explosives

• Wydawca: Wydział Geoinżynierii, Górnictwa i Geologii, Instytut Górnictwa Politechniki Wrocławskiej
• Czasopismo: Mining Science
• Rocznik: 2023
• Tom: Vol. 30
• Strony: 171--181
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Mollova Zdravka

• University of Mining and Geology “St. Ivan Rilski”, Department of Underground Construction, 1000, Sofia, Bulgaria

Bibliografia

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• MITKOV V., 2007, Production of explosives for civil purposes, 387 pp.
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• MITKOV V., 2007, The state of production of waterfilled slurry explosives in the Republic of Bulgaria. Conference proceedings from the International conference of Blasting techniques, Stara Lesna, Slovak Republic, 57–65.
• MITKOV V., 2014, Influence of the type of donor charge on the detonation velocity of granulites, Mining Informational and Analytical Bulletin – Scientific and Technical Journal, No. 9, 305–309.
• MITKOV V., BELIN V., SHISHKOV P., 2022, Insensitive and high-powered explosive material development to manufacture cumulative charge cutters, MIAB. Mining Inf. Anal., 6, Bull., 2022, ISBN: 0236-1493.
• ORLENKO L.P., 2002, Physics of explosion, Fismatlit, Moscow, 656 pp.
• STOILOVA S., MITKOV V., BELIN V.A, 2014, Comparison of the performance of a TNT charge detonated in open conditions and blast hole with stemming conditions, Annual of the University of Mining and Geology “St. Ivan Rilski”, 111–114.
• ZAID I.O., HAWKYARD J.B., JONSON W., 1971, Experiments in plate cutting by shaped high explosive charges, J. Mech. Eng. Sci., Vol. 13, No. 1.