Versatile rock-melting system for the formation of small-diameter horizontal glass-lined holes

Technical Report · Mon Oct 01 04:00:00 EDT 1973

DOI:https://doi.org/10.2172/4389629· OSTI ID:4389629

Sims, D L

Rock-melting penetrators with diameters ranging from 50 mm (2 in.) to 76 mm (3 in.) have reached a stage of development at the Los Alamos Scientific Laboratory (LASL) which suggests that these devices are ready for practical application. Prototype refractory metal penetrators have formed glass-cased vertical holes of 26 m (82 ft) in a single run, and horizontal holes with diameters up to 127 mm (5 in.) are expected in the near future. These small horizontal holes can be used for underground utility conduits; for high-explo sive shot emplacement; and as drainage holes to stabilize road cuts or embankments. Design concepts and preliminary specifications are described for a Subterrene system that forms small-diameter horizontal holes in rock by melting and simultaneously lines the hole with glassy rock melt. Most components of the system are commercially available. Deviation sensors and alignment-control units can be added to ensure that the holes are straight. The design and operation of this Subterrene system are described and proposed development approaches for the hole-forming assembly are discussed. (auth)

• Research Organization: Los Alamos Scientific Lab., N.Mex. (USA)
• DOE Contract Number: W-7405-ENG-36
• NSA Number: NSA-29-007441
• OSTI ID: 4389629
• Report Number(s): LA--5422-MS
• Country of Publication: United States
• Language: English

Related Subjects

*ROCK DRILLING-- SUBTERRENE PENETRATORS
*SUBTERRENE PENETRATORS-- DESIGN
BOREHOLES
N42000* --Engineering
OPERATION
PERFORMANCE