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<p>In the surface mining of iron ore at the Styrian Erzberg, drilling and blasting represent the standard process for rock excavation. Although the process objective is to optimise the blasting results (grain size distribution of the debris and stability of the quarry face), minimising process-related emissions must also be considered a&#xa0;key goal of blasting planning.</p><p>In addition to noise and dust, blast vibrations are a&#xa0;key component of these emissions. In production blasting, successful minimisation of blast vibrations can be achieved primarily by reducing the charge quantity used per firing time stage as this, along with the distance to the blast site and geological conditions, directly influences the level of blast vibrations at a&#xa0;specific location.</p><p>In this study, the influence of reduced charge quantities per firing time stage, achieved through the use of split charging columns, on the level of blast vibrations was investigated during production blasting at the Styrian Erzberg in the summer of 2024.</p><p>In 36&#xa0;measured blasts, an average reduction of blast vibrations of 20.8% was observed at a&#xa0;distance of approximately 700 m compared to comparable blasts with a&#xa0;continuous charging column.</p>

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Produktionssprengungen mit geteilter Ladesäule als Ansatz zur Minimierung von Bodenerschütterungen am Steirischen Erzberg

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Florian Fluch,
  • Christian Heiss,
  • Peter Schimek

摘要

In the surface mining of iron ore at the Styrian Erzberg, drilling and blasting represent the standard process for rock excavation. Although the process objective is to optimise the blasting results (grain size distribution of the debris and stability of the quarry face), minimising process-related emissions must also be considered a key goal of blasting planning.

In addition to noise and dust, blast vibrations are a key component of these emissions. In production blasting, successful minimisation of blast vibrations can be achieved primarily by reducing the charge quantity used per firing time stage as this, along with the distance to the blast site and geological conditions, directly influences the level of blast vibrations at a specific location.

In this study, the influence of reduced charge quantities per firing time stage, achieved through the use of split charging columns, on the level of blast vibrations was investigated during production blasting at the Styrian Erzberg in the summer of 2024.

In 36 measured blasts, an average reduction of blast vibrations of 20.8% was observed at a distance of approximately 700 m compared to comparable blasts with a continuous charging column.