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Compendious Index for Drillability: a rapid tool to assess drill penetration rate and bit life for rock engineering applications
https://orcid.org/0000-0001-6927-3195
https://orcid.org/0000-0002-1764-481X
Rock engineering for creating underground spaces involves drilling at various scales and the demand for the same is growing exponentially for meeting various engineering and societal needs. Rock drillability was comprehensively assessed for weak, abrasive, hard, and hard-abrasive rocks from Indo-Bhutan origins. An experimental methodology to measure the expected bit life along with penetration rate (PR) using a single test method was developed. Petrographic assessments, phase-wise drillability and bit wear (BW) parameters indicated that PR varied from 0.33 to 19.3 mm/min with about 90% PR reduction during the active drilling phase. Stress levels under the bit remained asymptotic below 40% of BW flat-width percentage. The mean penetration rate increased by 83% with increased thrust and drill productivity enhanced up to 1.6 times with the proposed Compendious Index for Drillability (CID). Field-scale studies indicated that the CID has better explained the variance in field PR and bit life up to 76.7% compared to popularly used DRI and CHI indices. Developed CPRI- and CID-based drillability characterization systems aided in estimating the field PR and bit life more accurately apart from their applicability vis-à-vis limitations in different geo-structural environments. Graphical Abstract
Compendious Index for Drillability: a rapid tool to assess drill penetration rate and bit life for rock engineering applications
https://orcid.org/0000-0001-6927-3195
https://orcid.org/0000-0002-1764-481X
Rock engineering for creating underground spaces involves drilling at various scales and the demand for the same is growing exponentially for meeting various engineering and societal needs. Rock drillability was comprehensively assessed for weak, abrasive, hard, and hard-abrasive rocks from Indo-Bhutan origins. An experimental methodology to measure the expected bit life along with penetration rate (PR) using a single test method was developed. Petrographic assessments, phase-wise drillability and bit wear (BW) parameters indicated that PR varied from 0.33 to 19.3 mm/min with about 90% PR reduction during the active drilling phase. Stress levels under the bit remained asymptotic below 40% of BW flat-width percentage. The mean penetration rate increased by 83% with increased thrust and drill productivity enhanced up to 1.6 times with the proposed Compendious Index for Drillability (CID). Field-scale studies indicated that the CID has better explained the variance in field PR and bit life up to 76.7% compared to popularly used DRI and CHI indices. Developed CPRI- and CID-based drillability characterization systems aided in estimating the field PR and bit life more accurately apart from their applicability vis-à-vis limitations in different geo-structural environments. Graphical Abstract
Compendious Index for Drillability: a rapid tool to assess drill penetration rate and bit life for rock engineering applications
https://orcid.org/0000-0001-6927-3195
https://orcid.org/0000-0002-1764-481X
Rock engineering for creating underground spaces involves drilling at various scales and the demand for the same is growing exponentially for meeting various engineering and societal needs. Rock drillability was comprehensively assessed for weak, abrasive, hard, and hard-abrasive rocks from Indo-Bhutan origins. An experimental methodology to measure the expected bit life along with penetration rate (PR) using a single test method was developed. Petrographic assessments, phase-wise drillability and bit wear (BW) parameters indicated that PR varied from 0.33 to 19.3 mm/min with about 90% PR reduction during the active drilling phase. Stress levels under the bit remained asymptotic below 40% of BW flat-width percentage. The mean penetration rate increased by 83% with increased thrust and drill productivity enhanced up to 1.6 times with the proposed Compendious Index for Drillability (CID). Field-scale studies indicated that the CID has better explained the variance in field PR and bit life up to 76.7% compared to popularly used DRI and CHI indices. Developed CPRI- and CID-based drillability characterization systems aided in estimating the field PR and bit life more accurately apart from their applicability vis-à-vis limitations in different geo-structural environments. Graphical Abstract
Compendious Index for Drillability: a rapid tool to assess drill penetration rate and bit life for rock engineering applications
Siva Prasad, B. N. V. (author) / Murthy, V. M. S. R. (author) / Naik, Sripad R. (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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