Femtosecond laser processing for blast-hole analysis: laser removal of slurry and e9ect on rocks

作     者：Brand, Julia Maximova, Ksenia Madden, Steve Rode, Andrei V. Mihankhah, Ehsan Zigman, John Hill, Andrew J. Rapp, Ludovic 

作者机构：Laser Physics Centre Department of Quantum Science and Technology Research School of Physics Australian National University CanberraACT2600 Australia Australian Centre for Robotics Faculty of Engineering University of Sydney NSW2006 Australia 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Fourier transform infrared spectroscopy 

摘      要：This study investigates the possibility of using a femtosecond pulse laser to remove iron ore slurry used to stabilise blast-hole structures by mining industries, intending to preserve the wall s stability and the chemical and compositional properties of the underlying rock. In situ minerals are often coated in other material deposits, such as dust or slurry in blast holes. To analyse the rock materials beneath, its surface must be exposed by removal of the surface layer. The ablation depth per pulse and ablation e?iciency of the slurry were determined using femtosecond laser pulses. Then, the ablation of rocks of economic interest in Australia, including banded iron, limonite, goethite, shale, and hematite, was studied to establish their ablation thresholds and rates. Any damage induced by the laser was investigated by optical microscopy, optical profilometry, colourimetry, VIS/NIR spectroscopy and Fourier Transform Infrared spectroscopy (FTIR). © 2024, CC BY.