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<p>The economic efficiency of limestone quarries is significantly influenced by the properties and arrangement of the holes and the efficiency of drilling, blasting, loading, hauling, and crushing processes. Key drilling parameters, including hole diameter, depth, spacing, burden, and specific charge, are crucial for determining drilling costs and blasting outcomes. Material from an optimally drilled and blasted hole requires less energy for crushing, reducing wear and tear on machinery and overall energy consumption. This study examines cost fluctuations using field data from a limestone quarry in Bucak District of Burdur Province. During the field tests, a total of 24 shots were performed using various parameters. Among them, 12 shots involved 565 blasting holes with a diameter of 89&#xa0;mm, covering a total length of 6215&#xa0;m, while the remaining 12 shots used 549 blasting holes with a diameter of 102&#xa0;mm, with a total length of 6039&#xa0;m. Based on the data obtained, a more cost-effective drill hole pattern was identified as the one with a hole diameter of 89&#xa0;mm, a burden of 2.5&#xa0;m, and a spacing of 3.5&#xa0;m between the holes. Furthermore, it was observed that increasing the burden and the spacing between the holes led to higher costs for crushing, loading, and hauling, whereas the expenses associated with drilling and blasting showed a reduction. Results indicate that the proposed hole pattern reduced operational expenses by as much as 8.5% compared to the present hole pattern.</p>

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Evaluation of the Operational Costs Depending on the Drill Hole Patterns in a Limestone Quarry: A Case Study

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Muhammed Aydin,
  • Nazmi Sengun

摘要

The economic efficiency of limestone quarries is significantly influenced by the properties and arrangement of the holes and the efficiency of drilling, blasting, loading, hauling, and crushing processes. Key drilling parameters, including hole diameter, depth, spacing, burden, and specific charge, are crucial for determining drilling costs and blasting outcomes. Material from an optimally drilled and blasted hole requires less energy for crushing, reducing wear and tear on machinery and overall energy consumption. This study examines cost fluctuations using field data from a limestone quarry in Bucak District of Burdur Province. During the field tests, a total of 24 shots were performed using various parameters. Among them, 12 shots involved 565 blasting holes with a diameter of 89 mm, covering a total length of 6215 m, while the remaining 12 shots used 549 blasting holes with a diameter of 102 mm, with a total length of 6039 m. Based on the data obtained, a more cost-effective drill hole pattern was identified as the one with a hole diameter of 89 mm, a burden of 2.5 m, and a spacing of 3.5 m between the holes. Furthermore, it was observed that increasing the burden and the spacing between the holes led to higher costs for crushing, loading, and hauling, whereas the expenses associated with drilling and blasting showed a reduction. Results indicate that the proposed hole pattern reduced operational expenses by as much as 8.5% compared to the present hole pattern.