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An Investigation into the Effect of Rock Properties on Drill Bit Life

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Abstract

The present research investigates the effect of rock properties on drill bit life prediction. The fieldwork and laboratory work include recording bit life (m/bit), penetration rate (m3/min) and various rock properties testing from the overburden rock samples collected from different coal seams of a surface coal mine after blasting. Laboratory tests such as Cerchar abrasivity index (CAI), Cerchar hardness index (CHI), P and S- wave velocity, uniaxial compressive strength (UCS), point load strength index, drillability Sievers’ J value (Sj), brittleness index (S20), and drilling rate index (DRI) were carried on the collected rock specimens. Through the above laboratory tests, the physio-mechanical properties of the rock specimen were co-related with drill bit life. The major properties affecting the bit life were identified, and multiple variable linear regression modeling was performed based on the in situ rock properties and laboratory properties to predict the drill bit life.

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Acknowledgements

The authors would like to express our sincere appreciation to the Department of Mining Engineering of IIT (ISM) Dhanbad for their unwavering support and resources provided during this research.

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On behalf of the corresponding author, all the authors declare that this research was conducted without any external funding support.

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Authors and Affiliations

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

    Mayank Thakur, Bhanwar Singh Choudhary & Vikram Seervi

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  1. Mayank Thakur
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  2. Bhanwar Singh Choudhary
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  3. Vikram Seervi
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Contributions

All the authors contributed to the study conception and design, data collection and analysis were performed by MT. All authors read and approved the final manuscript.

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Correspondence to Vikram Seervi.

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Thakur, M., Choudhary, B.S. & Seervi, V. An Investigation into the Effect of Rock Properties on Drill Bit Life. J. Inst. Eng. India Ser. D (2023). https://doi.org/10.1007/s40033-023-00542-2

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