Design and Development of a Conical boring Device to Enlarge a Pilot Hole through Rock
Semi-annual technical rept. 1 May-10 Sep 1972
FOSTER-MILLER INC WALTHAM MA
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The report summarizes effort to design and develop a conical, self- advancing and self-rotating boring machine. The conical borer will use a proven and energy effective mechanical fragmentation system - roller cutters - and will operate as a reaming device to enlarge an existing 8 34 inch pilot hole to a final 38 inch bore.
- Mining Engineering
- Civil Engineering
- Machinery and Tools