Study on Effect of Blast Vibration on Size of Fragmentation at Limestone Quarry

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  • SHIMADA Hideki
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
  • MATSUI Kikuo
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
  • ICHINOSE Masatomo
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
  • SASAOKA Takashi
    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
  • KUBOTA Shiro
    Research Center for Explosion Safety, National Institute of Advanced Industrial Science and Technology
  • M.SIMANGUNSONG Ganda
    Research Center for Explosion Safety, National Institute of Advanced Industrial Science and Technology
  • OGATA Yuji
    Research Center for Explosion Safety, National Institute of Advanced Industrial Science and Technology

Bibliographic Information

Other Title
  • 露天資源開発の現状と新たな展開を支える技術　　石灰石鉱山における発破振動および起砕物の粒度に関する二，三の考察
  • 石灰石鉱山における発破振動および起砕物の粒度に関する二,三の考察
  • セッカイセキ コウザン ニ オケル ハッパ シンドウ オヨビ キサイブツ ノ リュウド ニ カンスル 2 3 ノ コウサツ

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Abstract

The research was mainly performed to check whether or not the blast burden influence vibration magnitude. This is associated with the necessity to reconsider blasting design in order to reduce vibration to the acceptable levels. Blast vibration monitoring of three scenarios of burden were managed in limestone quarry. The vibration monitoring results are found in good agreement with what had been found by other researchers in terms of duration, amplitude, and frequency. Vibration waveforms typically last for 50 to 100 milliseconds. The peak amplitudes decrease according to additional distance. Frequencies decrease with increasing distance. The weight scaling law between the PPV and scaled distance revealed three relationships for three different scenarios of burden, which obviously indicate that blast burden influences vibration magnitude. The highest vibration magnitudes are produced by the biggest blast burden. Otherwise the lowest levels of vibration magnitude are produced by the smallest blast burden. Parallel with the main idea, which were mainly performed to check the influence of the blast burden to vibration magnitude, investigation was extended to measure fragmentation of the blasted rocks. Fragmentation measurement was achieved using the analysis of scaled photograph taken form a muckpile. Using software known as Split Engineering, the blasted rocks resulted from three scenarios of blast burden were simply calculated and presented in size distribution curve. The average fragment size increases exponentially with increasing blast burden.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 122 (12), 573-581, 2006

    The Mining and Materials Processing Institute of Japan

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