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Stemming material and Inter-row delay timing effect on blast results in limestone mines

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Abstract

Safe and efficient blasting is the prime objective of any blasting engineer. The safe and efficient is generally called when there are no fly rocks, less ground vibration and optimum fragmentation with loose muckpile. This study describes the use of stemming material and inter-row delay timing effect to improve the efficiency of the blast and its results. From the study, it was found that the use of aggregates or screened drill cuttings having a size of 3-7 mm helps in reducing the collar generated boulders as well as increasing the looseness of the muckpile. Change in delay timing between rows also determined that the mean fragment sizes are fair and uniform, muckpile parameters were improved when the delay between first and second row was 8-14 ms/m of burden and the delay gap between last two rows was 5 ms/m of the burden.

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Authors and Affiliations

  1. Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India

    Bhanwar Singh Choudhary, Anurag Agrawal & Rajesh Arora

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  1. Bhanwar Singh Choudhary
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  2. Anurag Agrawal
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  3. Rajesh Arora
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Correspondence to Anurag Agrawal.

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Choudhary, B.S., Agrawal, A. & Arora, R. Stemming material and Inter-row delay timing effect on blast results in limestone mines. Sādhanā 46, 23 (2021). https://doi.org/10.1007/s12046-020-01552-6

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  • DOI: https://doi.org/10.1007/s12046-020-01552-6

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