Instrumentation techniques for monitoring shock and detonation waves
CORRTEX (Continuous Reflectometry for Radius Versus Time Experiments), SLIFER (Shorted Location Indication by Frequency of Electrical Resonance), and pin probes were used to monitor several conditions of blasting such as the detonation velocity of the explosive, the functioning of the stemming column confining the explosive, and rock mass motion. CORRTEX is a passive device that employs time-domain reflectometry to interrogate the two-way transit time of a coaxial cable. SLIFER is an active device that monitors the changing frequency resulting from a change in length of a coaxial cable forming an element of an oscillator circuit. Pin probes in this application consist of RG-174 coaxial cables, each with an open circuit, placed at several known locations within the material. Each cable is connected to a pulse-forming network and a voltage source. When the cables are shorted by the advancing wave, time-distance data are produced from which a velocity can be computed. This paper describes each technique, installation of the gauge, examples of the signals, and interpretation of the records. 11 refs., 11 figs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6410429
- Report Number(s):
- LA-UR-85-3521; CONF-8511106-2; ON: DE86002388
- Resource Relation:
- Journal Volume: 10; Journal Issue: 8; Conference: Society of Experimental Mechanics fall conference, Grenelefe, FL, USA, 17 Nov 1985; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
DETONATION WAVES
MEASURING INSTRUMENTS
SHOCK WAVES
COAXIAL CABLES
EXPLOSIVE FRACTURING
INSTALLATION
MONITORING
OIL SHALES
BITUMINOUS MATERIALS
CABLES
CARBONACEOUS MATERIALS
COMMINUTION
CONDUCTOR DEVICES
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FRACTURING
FUELS
MATERIALS
040300* - Oil Shales & Tar Sands- Drilling
Fracturing & Mining
440400 - Well Logging Instrumentation