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Scientific, Technological and Production Journal
ISSN 2079–3332 (print)
ISSN 3034-6835 (online)
founded in 2001

Increasing of a blasted block width in the open pit final-wall zone by using relief pauses with keeping safety vibration

Original articles: 2026 No 5

Increasing of a blasted block width in the open pit final-wall zone by using relief pauses with keeping safety vibration

DOI: 10.56195/20793332-2026-26-5-118-124

Read in pdf I.O. Kovalchuk, А.А. Dobrynin, R.A. Rakhmanov
  1. Institute of comprehensive exploration of mineral resources Russian academy of sciences, Moscow, Russian Federation
p. 118-124
Abstract:
This paper presents the results of measurements of blast-induced ground vibration from a production blast in the finalwall zone of an open pit, including an analysis of the effect of the blasted block width on the amplitude of peak particle velocity in the rock mass. The paper also evaluates the loss of excavation productivity as a function of the width of blasted blocks and proposes measures that generally contribute to improving pit slope stability and increasing the productivity of loading and hauling equipment. The paper is based on a description of a blasting technique involving the use of relief pauses in combination with an electronic initiation system. A combined application of electronic and non-electric initiation systems is also considered. In addition, the paper emphasizes the importance of highly qualified technical support during the implementation of electronic initiation systems, taking into account the geological and structural conditions of the rock mass. Research results can be useful to prepare for excavation rock mass by drilling and blasting method in the conditions of deep open pits where issues of seismic safety are priority.
Keywords:
ground vibration, overbreak, peak particle velocity, geological and structural conditions, vibration sensors, in-hole geophone, regression analysis, excavation and loading equipment productivity, pit slope stability, electronic blasting system, relief pauses
For citation:
Kovalchuk I.O., Dobrynin А.А., Rakhmanov R.A. Increasing of a blasted block width in the open pit final-wall zone by using relief pauses with keeping safety vibration. Mine Surveying and Subsurface Use. 2026; 26 (5): 118-124. (In Russ.). https:// doi.org/10.56195/20793332-2026-26-5-118-124
Information about the authors:
  1. Ivan O. Kovalchuk – Postgraduate Student, Institute of Comprehensive Exploitation of Mineral Resources named after academician N.V. Melnikov Russian Academy of Sciences, Moscow, Russian Federation
  2. Alexander A. Dobrynin – Cand. Sci. (Eng.), Senior Researcher, Institute of Comprehensive Exploitation of Mineral Resources named after academician N.V. Melnikov Russian Academy of Sciences, Moscow, Russian Federation
  3. Ruslan A. Rakhmanov – Cand. Sci. (Eng.), Senior Researcher, Institute of Comprehensive Exploitation of Mineral Resources named after academician N.V. Melnikov Russian Academy of Sciences, Moscow, Russian Federation
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