Scholarlink

<p>Effective stemming is essential in open pit bench blasting, as it directly influences explosive energy confinement, rock fragmentation, safety, an environmental impact. This study evaluated five stemming materials – drill cuttings, construction grade sand, and three coarse aggregates (5–18&#xa0;mm, 10–30&#xa0;mm, and 10–40&#xa0;mm) through twenty-five production blasts with consistent geometric and charge conditions. Fragmentation was quantitatively assessed using digital image analysis to determine the median fragment size, uniformity index, and oversize proportion, while field monitoring captured ground vibration, air-overpressure, fly-rock, and back-break. Two novel performance indices were introduced – the Stemming Material-Delay Performance Index (SMDPI), a physics-based metric integrating material properties, vibration attenuation, and delay timing effects; and the Blast Performance Index (BPI), a composite measure combining fragmentation, environmental, and safety indicators. Results demonstrated that 5–18&#xa0;mm aggregate consistently delivered superior outcomes, achieving the highest SMDPI and BPI scores, with optimized fragmentation, minimal oversize, and controlled fly-rock. Sand and drill cuttings offered moderate performance, while coarser aggregates exhibited significant deficiencies due to inadequate compaction and gas venting. Both indices provided practical, decision-support tools for stemming material selection, enabling improved blast efficiency and regulatory compliance. Future research would validate these metrics across diverse geological settings and explore integration with spectral vibration analysis and machine learning for enhanced blast optimization.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental Evaluation of Stemming Materials in Open Pit Bench Blasting using a Mechanistic Index Framework

  • 期刊论文

  • 发表日期：

    2026年7月11日

查看全文
  • Prasanna Kumar Panda,
  • Chandrakanta Behera,
  • Subhamoy Ghosh,
  • Manoj Kumar Mishra

摘要

Effective stemming is essential in open pit bench blasting, as it directly influences explosive energy confinement, rock fragmentation, safety, an environmental impact. This study evaluated five stemming materials – drill cuttings, construction grade sand, and three coarse aggregates (5–18 mm, 10–30 mm, and 10–40 mm) through twenty-five production blasts with consistent geometric and charge conditions. Fragmentation was quantitatively assessed using digital image analysis to determine the median fragment size, uniformity index, and oversize proportion, while field monitoring captured ground vibration, air-overpressure, fly-rock, and back-break. Two novel performance indices were introduced – the Stemming Material-Delay Performance Index (SMDPI), a physics-based metric integrating material properties, vibration attenuation, and delay timing effects; and the Blast Performance Index (BPI), a composite measure combining fragmentation, environmental, and safety indicators. Results demonstrated that 5–18 mm aggregate consistently delivered superior outcomes, achieving the highest SMDPI and BPI scores, with optimized fragmentation, minimal oversize, and controlled fly-rock. Sand and drill cuttings offered moderate performance, while coarser aggregates exhibited significant deficiencies due to inadequate compaction and gas venting. Both indices provided practical, decision-support tools for stemming material selection, enabling improved blast efficiency and regulatory compliance. Future research would validate these metrics across diverse geological settings and explore integration with spectral vibration analysis and machine learning for enhanced blast optimization.