This paper describes one of several research projects funded by the Advanced Research Projects Agency to extend the technology of rapid underground excavation. This study and field research effort are to investigate alternative means to determine rock and geological conditions in advance of a tunnel boring machine (TBM). Approximately 1 year of a planned 3-year program has resulted in the definition of three candidate drill systems. Hardware has been assembled to field test these candidates and testing has begun.

Media Info

  • Pagination: p. 65-87
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00040968
  • Record Type: Publication
  • Source Agency: Bureau of Mines
  • Files: TRIS
  • Created Date: Apr 2 1973 12:00AM