RAPID EXCAVATION OF ROCK WITH SMALL CHARGES OF HIGH EXPLOSIVES

The purpose of this investigation was to determine the feasibility of designing and testing the elements of a small-charge blasting system that will eliminate, or reduce to acceptable levels, most of the undesirable features of current underground drill and blast systems, that is, (1) air blast, (2) ground vibrations, (3) flying fragments, (4) overbreak and fracture of surrounding rock, and (5) the cyclic nature of drill and blast operations. The experimentation was conducted in tunnels in granite, and the results indicated that the basic technical concepts of the project were achieved. The next step is to design, construct, and test a prototype machine.

• Corporate Authors:

  University of Missouri, Rolla

  Rock Mechanics and Explosives Research Center
  Rolla, MO  United States  65409

  Bureau of Mines

  C Street Between 18th and 19th Streets, NW
  Washington, DC  United States  20241
• Authors:
  • Clark, G B
  • Rollins, R R
• Publication Date: 1976-11

Media Info

• Pagination: 121 p.

Subject/Index Terms

• TRT Terms: Blast loads; Detonation; Earth movements (Geophysics); Excavation; Explosives; Mining; Presplitting (Blasting); Tunneling
• Uncontrolled Terms: Fragmentation
• Old TRIS Terms: Detonators; Earth movement; Excavation technology; Explosive charges; Underground mining
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00166259
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: BuMines-OFR-98-77 Final Rpt.
• Contract Numbers: H0252052
• Files: TRIS
• Created Date: Sep 20 1977 12:00AM