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.
University of Missouri, RollaRock Mechanics and Explosives Research Center
Rolla, MO USA 65409
Bureau of MinesC Street Between 18th and 19th Streets, NW
Washington, DC USA 20241
- Clark, G B
- Rollins, R R
- Publication Date: 1976-11
- Pagination: 121 p.
- 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;
- 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