Accession Number:

AD0751565

Title:

Design and Development of a Conical boring Device to Enlarge a Pilot Hole through Rock

Descriptive Note:

Semi-annual technical rept. 1 May-10 Sep 1972

Corporate Author:

FOSTER-MILLER INC WALTHAM MA

Personal Author(s):

Report Date:

1972-09-01

Pagination or Media Count:

90.0

Abstract:

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.

Subject Categories:

  • Mining Engineering
  • Civil Engineering
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE