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Thermal Drilling of Blastholes.
Subsection 11 5 in SME Mining Engineering Handbook 1:11-56to11-60
This section on thermal drilling and chambering (jet piercing) of blastholes describes high-energy heating as a proven though relatively new method of preparing blastholes. Novel high-energy heat sources with the potential for drilling and disintegrating rocks are laser and infrared heaters, electron beams, plasma heaters, electrical heaters, and supersonic oxygen-fuel oil or compressed air-fuel oil burners. Supersonic "rocket" burners using oxygen and light petroleum-based fuel oil reactants have found wide acceptance for blasthole drilling, especially in some hard taconite formations.
Subsection 11.5 in SME Mining Engineering Handbook, Vol. 1, PP. 11- 56 to 11-60
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division