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Spiral drill-and-blast concept may speed up tunneling advance rate.
Peterson-CR; Fisk-AT; Brooks-RE
Min Eng 1977 Jun; 29(6):29-32
In continuing efforts of the Bureau of Mines and the Department of Transportation (DOT) to develop a continuous drill-and-blast excavation capability in mining and high-speed tunneling, DOT developed and tested a prototype machine, including the drilling, loading, blast initiation, and shielding components. Principal emphasis was on developing a remotely controlled automated system for loading and initiating explosive charges. Except for a problem stemming from the unexpected desensitization of the explosive substance used, which has since been overcome, all components functioned properly and survived the blasting.
Mining-industry; Explosive-devices; Explosives; Blasting-agents; Underground-mining; Mine-shafts
OP; Journal Article
Issue of Publication
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division