FABRICATION AND TESTING OF A WATER CANNON FOR ROCK TUNNELING EXPERIMENTS

A water cannon was fabricated and tested to evaluate its effectiveness in disintegrating rock for potential application in hard rock tunneling. Experiments were conducted in the laboratory and in field tests in a dolomitic limestone mine and in a granitic gneiss quarry. As jet stagnation pressures were increased in the range from below 100,000 to 650,000 psi (700 to 4500 Mn/sq m), the specific energy for disintegrating rock generally decreased, except for some evidence of a minimum specific energy for barre granite at a jet pressure near 400,000 psi (2800 Mn/sq m). The water cannon tests obtained specific energy values which are competitive with the best rolling cutter tunneling machines. Results to date indicate that practical application of water cannons has high potential in rock tunneling.

  • Corporate Authors:

    Terraspace, Incorporated

    304 North Stonestreet Avenue
    Rockville, MD  USA  20850

    Federal Railroad Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Cooley, W C
  • Publication Date: 1974-2

Media Info

  • Pagination: 92 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00303669
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FRA/ORD/D-74-38 Final Rpt., TR-406-1
  • Contract Numbers: DOT-FR-20042
  • Files: TRIS, USDOT
  • Created Date: Feb 11 1980 12:00AM