RSM-Based Model to Estimate the V-Cut Drill and Blast Pattern Specific Charge in Rock Tunneling
Publication: International Journal of Geomechanics
Volume 21, Issue 11
Abstract
Drilling and blasting (D&B) technology is an appropriate method for rock excavation in underground mining and civil engineering projects. Specific charge as the amount of explosives used per cubic meters of extracted rock is the most important role in D&B operations. Therefore, different models have been proposed for the estimation of specific charge. The aim of this research is to develop a second-order quadratic model using response surface methodology (RSM) to estimate the specific charge in rock tunneling (V-cut D&B pattern). For this purpose, 31 data series related to geomechanic and D&B are used for modeling. In the suggested model, rock quality designation (RQD), P-wave velocity (Km/s), tunnel cross section area (m2), blast hole coupling ratio, and D&B pattern spacing/burden ratio are used as effective factors on specific charge as model response. The proposed RSM-based quadratic model consists of one quadratic, five linear, and five interaction terms. The statistical details of this model, conventional related graphs, and RSM specific analysis have satisfied the recommended model. For the specific charge, the spacing/burden ratio is more effective than the other factors and interactions.
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Acknowledgments
The authors are thankful to Dr. A. K. Chakraborty for making the data available for this research.
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Published In
International Journal of Geomechanics
Volume 21 • Issue 11 • November 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Nov 9, 2020
Accepted: Jun 26, 2021
Published online: Sep 13, 2021
Published in print: Nov 1, 2021
Discussion open until: Feb 13, 2022
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