Study of a Continuous Drill and Blast Tunneling Concept
Final rept. 17 Aug 1972-6 Feb 1973
RAPIDEX INC BOXFORD MA
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A spiral drilling pattern is described which offers high efficiency drill and blast tunneling via frequent small blasts rather then the occasional large blasts of conventional practice. Preliminary design work is presented for a combined drilling, loading, shooting, and mucking machine which would stay at the tunnel face, providing continuous drill and blast progress. Advance rates in excess of 13 feet per hour in an 8 x 8 foot horseshoe tunnel are predicted using off-the-shelf except for automated explosive loading and initiation components.
- Mining Engineering