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Modelling the effects of ground vibrations on the surface due to blasting in underground coal mines

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Abstract

Explosives are still the cheapest source of breaking rock in the mining or tunnelling operation and can be applied in varying geological conditions. It generates various troubles such as ground vibration, air overpressure, and fly rocks. It is well known that the maximum charge per delay (MCPD) has to be optimum for safe blasting and can be achieved through trial blasts, which is a complicated and costly process. Therefore, it is required to reduce the number of trial blasts. In this study, a total of 18 blasts were conducted in an underground coal mine and were simulated using similar ground conditions using Ansys software. The Peak particle velocity values obtained in the mines and through the models were compared. The error in PPV found between the actual and predicted by simulation is less than 15%. It can help us design the MCPD in rock excavation operations, visualise damages using simulation in Ansys software, and economical compared to field trials.

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Authors and Affiliations

  1. Department of Mining Engineering, IIT(ISM) Dhanbad, Dhanbad, 826004, Jharkhand, India

    Shankar Kumar, Bhanwar Singh Choudhary & Arvind Kumar Mishra

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  1. Shankar Kumar
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  2. Bhanwar Singh Choudhary
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  3. Arvind Kumar Mishra
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Correspondence to Shankar Kumar.

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Kumar, S., Choudhary, B.S. & Mishra, A.K. Modelling the effects of ground vibrations on the surface due to blasting in underground coal mines. Nat Hazards 110, 315–323 (2022). https://doi.org/10.1007/s11069-021-04948-7

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  • DOI: https://doi.org/10.1007/s11069-021-04948-7

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