Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Assessment of Charge Initiation Techniques Effect on Blast Fragmentation and Environmental Safety: An Application of WipFrag Software

Version 1 : Received: 8 June 2023 / Approved: 8 June 2023 / Online: 8 June 2023 (09:44:49 CEST)

A peer-reviewed article of this Preprint also exists.

Taiwo, B.O.; Fissha, Y.; Palangio, T.; Palangio, A.; Ikeda, H.; Cheepurupalli, N.R.; Khan, N.M.; Akinlabi, A.A.; Famobuwa, O.V.; Faluyi, J.O.; Kawamura, Y. Assessment of Charge Initiation Techniques Effect on Blast Fragmentation and Environmental Safety: An Application of WipFrag Software. Mining 2023, 3, 532-551. Taiwo, B.O.; Fissha, Y.; Palangio, T.; Palangio, A.; Ikeda, H.; Cheepurupalli, N.R.; Khan, N.M.; Akinlabi, A.A.; Famobuwa, O.V.; Faluyi, J.O.; Kawamura, Y. Assessment of Charge Initiation Techniques Effect on Blast Fragmentation and Environmental Safety: An Application of WipFrag Software. Mining 2023, 3, 532-551.

Abstract

Blast charge initiation procedures have a significant impact on both mining safety and production rates. In this study, the inventory benefit of an electric initiation system was investigated to assess its influence on both fragmentation and blast-induced damages. The Wipfrag software's was used to examine the size distribution and productivity of 12 small-scale blasts initiated by both non-electric and electric detonators. All blast rounds was initiated with plain type of electric and NONEL detonators. The average burden, spacing, stemming length, and charge weight were, respectively, 0.85 m, 1.10 m, 0.66m, and 1.1kg. The results showed that the mesh through which 80% of the blast fragments will pass for the electric blast is smaller than the mesh through which the material products from the NONEL blast will pass. The results also demonstrate that the generated blast-induced ground vibration (PPV) from all blast rounds for electric blast varies from 0.4–1.2 mm/s and 80–105dB, while that for non-electric blast ranges from 0.05–0.2mm/s and 72–95dB. As a result, the electric blast initiation technique was found to produce good fragmentation, with a higher percentage of optimum fragment sizes on spec than non-electrically initiated blasts.

Keywords

marble; small-scale mining; blast impact; fragments size characterization; WipFrag,

Subject

Engineering, Mining and Mineral Processing

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