Rock Disintegration by Pulsed Liquid Jets

reportActive / Technical Report | Accession Number: AD0737621 | Open PDF

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.

Author(s):
Cooley, William C. ; Brockert, Paul E.
Author Organization(s):
TERRASPACE INC BETHESDA MD
Descriptive Note:
Annual rept. Jan 1971-Jan 1972
Supplementary Note:
See also Semiannual rept. dated Jul 1971, AD0728040.
Pagination:
0043

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-4032
Contract/Grant Number(s):
H0210012, ARPA ORDER-1579
Project Number(s):
ARPA-1F10
Monitor Series:
DARPA
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_1.2.7_Experimentation; JCA_5.3_Planning; JCA_5_Command and Control; JCA_6_Net Centric
Modernization Areas:
Directed Energy
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*LIQUID JETS, *ROCK, COMPRESSIVE PROPERTIES, FRACTURE(MECHANICS), GRANITE, LIGHT GAS GUNS, LIMESTONE, NOZZLES, SANDSTONE
Field(s)/Group(s):
Mining Engineering, Test Facilities, Equipment and Methods
Keyword(s):
AIR GUNS, *ROCK DISINTEGRATION, TUNNELING
Report Date:
1971 Jan 01