JRMGE / Vol 14 / Issue 5
Evaluation of the energy efficiency of rotary percussive drilling using dimensionless energy index
V.N. Oparin, V.N. Karpov, V.V. Timonin, A.I. Konurin
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Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi Prospect 54, Novosibirsk, 630091, Russia
2022, 14(5): 1486-1500. doi:10.1016/j.jrmge.2021.12.021
Received: 2021-07-05 / Revised: 2021-08-31 / Accepted: 2021-12-02 / Available online: 2022-02-02
2022, 14(5): 1486-1500.
doi:10.1016/j.jrmge.2021.12.021
Received: 2021-07-05
Revised: 2021-08-31
Accepted: 2021-12-02
Available online: 2022-02-02
This paper sets forth a geomechanics framework for assessing the energy efficiency of rotary percussive drilling using the energy criterion, which has been proposed by Victor Oparin for volumetric destruction of high-stress rocks having nonuniform physico-mechanical properties. We review the long-term research and development in the specified area of science and technology, including research and development projects implemented at the Institute of Mining, Siberian Branch of the Russian Academy of Sciences. A new modified expression of Oparin's dimensionless energy criterion of volumetric rock destruction k is introduced. The range of in situ values is determined for the energy criterion of volumetric rock destruction at the optimized energy efficiency of rotary percussive drilling. The temporo-spatial intervals of geotechnical monitoring are found to control pneumatic drilling energy efficiency at subsoil use objects in Russia. The integrated experimental, theoretical and geotechnical approach to the comprehensive investigation of real-time processes of rock fracture in rotary percussive drilling using the energy concept possesses the necessary geomechanical performance-and-technology potential to create the next level geotechnical monitoring of drilling systems for various purposes, including determination of physico-mechanical properties and the stress-strain analysis of rock mass in full-scale drilling.
Keywords: Rotary percussive drilling, Geotechnical monitoring, Drilling machine, Energy criterion, Energy efficiency
Article Data
Author(s) Information
Prof. Victor N. Oparin
Oparin@misd.nsc.ru
Viktor N. Oparin obtained his university degree in Novosibirsk State University, Russia, in 1974, and his Candidate of Science and Doctor of Science degrees in Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, in 1978 and 1987, respectively. He was affiliated with Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, as scientific staff from 1978 to 1985, as Head of the Laboratory of Mining Geophysics from 1985 to 2012, as Deputy Director from 1998 to 2003, as Director from 2003 to 2013, and as Head of the Department of Experimental Geomechanics since 2014. He founded the Department of Geomechanics at the Faculty of Geology and Geophysics of Novosibirsk State University and created the Mining Scientific and Educational Center with the participation of nine largest Universities in Siberia, Russia. His research interests include development of theoretical foundations for geomechanical interpretation of geophysical data, creation of complexes of measuring instruments for diagnostics of the stress-strain state of rock masses and control of geomechanical processes, and nonlinear geomechanics and mining geophysics. He has been participated in a large number of international and Russian national projects.