The effect of blasting using low-density emulsion explosives

Scientific paper - Original scientific paper

• Author: Vinko Škrlec
• Author: Mario Dobrilović
• Author: Barbara Štimac Tumara
• Author: Vječislav Bohanek
• Author's institution: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mining and Geotechnical Engineering)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering

Abstract (english)

Low-density emulsion explosives are essentially blends of an emulsion matrix and a certain amount of gaseous phase inclusions acting as hot spots. With the addition of expanded polystyrene for gaseous sensibilization, the resulting explosive blend was developed to reduce peak values and pressure impulse of gaseous detonation products on surrounding rock. This resulted in a decrease in rock stress and a decrease in cracking zone width outside of the minefield boundary. The use of low-density emulsion explosives correlates with the decrease in the seismic effect of blasting, more precisely, the decrease of induced rock oscillation velocities. The low-density emulsion explosive used in this work was validated based on laboratory and field experiments. The laboratory experiments measured dominantly detonation and safety characteristics, while field experiments characterized working capacity, i.e. single-shot blasting effect in an igneous diabase. The obtained measurements were compared against reference explosives (pentrite, emulsion explosive sensitized with glass microspheres, and ANFO explosive). Measured parameters were detonation velocity and oscillation velocity used to determine the seismic effect of blasting in the immediate borehole vicinity.

• Keywords (english): blasting; low-density explosive; work capacity; seismic effect
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Journal of Sustainable Mining
• Numbering: vol. 23, no. 1, pp. 10-19
• e-ISSN: 2300-3960
• DOI: https://doi.org/10.46873/2300-3960.1401
• URN:NBN: urn:nbn:hr:169:897827
• Publication: 2024-01-01
• Project: Number: IP-2019-04-1618; Title (croatian): Poboljšani model neidealne detonacije gospodarskih eksploziva; Title (english): An improved model of non-ideal detonation of commercial explosives; Acronym: NEIDEMO; Leader: Muhamed Sućeska; Jurisdiction: Croatia; Funding stream: IP
• Document URL: https://jsm.gig.eu/journal-of-sustainable-mining/vol23/iss1/2
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-01-25 15:26:53