Accession Number:

AD0765792

Title:

Quasi-Continuous Explosive Concepts for Hard Rock Excavation

Descriptive Note:

Final rept. Feb-Jun 1972

Corporate Author:

WHITTAKER CORP NORTH HOLLYWOOD CA SHOCK HYDRODYNAMICS DIV

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

59.0

Abstract:

The use of continuous or quasi-continuous systems for pulsed explosion rock excavation, can have major advantages over conventional methods. This report considers the feasibility and applicability of such an explosive system concept. The optimum properties of the explosive system, the effectiveness of the explosive rock interactions and the interactions between successive explosions were determined in tests on granite and concrete. A prototype multiple charge launcher was designed, built and tested to demonstrate the feasibility of a multiple feed system. The quasi-continuous explosive projectile launcher appears to be capable of unusually high drilling rates into hard rock. Recommendations are made for application of the launcher system to actual hard rock excavation conditions.

Subject Categories:

  • Civil Engineering
  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE