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Blast Vibration Analysis from Signature Holes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering - Swedish Blasting Research Centre. (Mining and Geotechnical Engineering)ORCID iD: 0000-0001-8564-3694
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering - Swedish Blasting Research Centre.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering - Swedish Blasting Research Centre.
2022 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Blasting is a cost-effective process for the mining and construction industryfor production and development. However, blast vibration is an undesired side effect of the process. Itmight causesevere damagesto the surrounding buildings and infrastructures. Depending on the type of the blast, location and design of a blast, the magnitude of peak particle velocity (PPV) needs to be lower than threshold as stated by local regulations. This study investigated if there is a difference between confined and free face blasting. The experimental plan was composed of 10 decoupled confined holes and 13 decoupled free face holes. All the blastholes were charged withapproximately0.95kg (2.09 lb/stick) of dynamitestickexplosive (Minex eco Ø32 mm(1.26 in)) and blasted separately. The instrumentation was composedby four triaxial grouted geophones that were used to capture the emanating waves from the detonation of the blastholes. The waveforms were analyzed in a conventional way, i.e. calculation of PPV and frequencies. In addition to the PPV analysis, a continuous wavelet transform (CWT), the analytic Morlet wavelet, was also applied to analyze the waveformsin terms of frequency componentsfrom the detonation of the blastholes. The results of the analysis did not show any significant difference between the free face and confined blastholes. 

 

Place, publisher, year, edition, pages
2022.
National Category
Mineral and Mine Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-104195OAI: oai:DiVA.org:ltu-104195DiVA, id: diva2:1834813
Conference
48th Annual Conference on Explosives and Blasting Technique
Available from: 2024-02-05 Created: 2024-02-05 Last updated: 2024-02-05

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CiteExportLink to record
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