The penetration of the earth by melting (Subterrene technique) may facilitate the tunneling and excavating of rock or soil. The acceptance of such an innovation requires early and convincing practical field demonstrations. Such field tests have been performed to produce 2-in. (51-mm)- diam holes up to 82 ft (25m) deep in local volcanic tuff. Both vertical and horizontal holes have been made. Equipment is discussed and shown to be practical. The following is required to produce a 2-in.-diam hole: a refractory penetrator, a 10-kw electrical power source, a 15-hp coolant air compressor, and a low-load less than 3000 lb (13 KN) stem advancer and retriever. No rotating equipment is needed and no debris removal is required. The rock that is melted to accommodate passage of the penetrator is consolidated into a glass casing as penetration proceeds. Penetrator life is shown to be greater than 100 h. /AUTHOR/

  • Supplemental Notes:
    • Sponsored in part by the National Science Foundation and the U.S. Atomic Energy Commission.
  • Corporate Authors:

    Los Alamos National Laboratory

    P.O. Box 1663
    Los Alamos, NM  United States  87545
  • Authors:
    • Gido, R G
  • Publication Date: 1973-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 14 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00126355
  • Record Type: Publication
  • Report/Paper Numbers: LA-5213-MS
  • Contract Numbers: W-7405-ENG.36
  • Files: TRIS
  • Created Date: Apr 21 1976 12:00AM