Accession Number:

AD0737621

Title:

Rock Disintegration by Pulsed Liquid Jets

Descriptive Note:

Annual rept. Jan 1971-Jan 1972

Corporate Author:

TERRASPACE INC BETHESDA MD

Report Date:

1972-01-01

Pagination or Media Count:

43.0

Abstract:

Experiments are reported on the breakage of granite, limestone and sandstone by pulsed water jets using a Voitsekhovsky-type cumulation nozzle with jet velocities up to 1800 msec, a jet diameter of 0.716 cm, and piston impact energies up to 65,000 Joules. Data on the specific energy for single pulse spall craters in the face of 30 cm cubic rock samples is plotted against the specific pressure the ratio of jet stagnation pressure to rock compressive strength. The specific energy decreases rapidly as the jet stagnation pressure is increased from 1.43 to 3.95 times the compressive strength.

Subject Categories:

  • Mining Engineering
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE