A numerical study of bench blast row delay timing and its influence on percent cast
Sandia National Laboratories and ICI Explosives USA have worked together since 1987 to develop computer modeling techniques for Rock Blasting. A result of this effort is the computer program DMC (Distinct Motion Code) which was developed for two-dimensional simulation of rock motion following a blast (Taylor and Preece, 1989 & 1992). This program has been used to study blasting-induced rock motion resulting from oil shale mining and has been coupled with a gas flow computation capability for better treatment of the explosive behavior. This past year it has been customized for simulations of bench blasting in coat mines and rock quarries (Preece and Knudsen, 1992b). The explicit descretized nature of DMC gives it an advantage over previous blast modeling programs because subtle differences, such as row delay timing, have an influence on the results. This paper will present a DMC study of the influence on percent cast of row delay timing in a typical coal mine bench blast.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10191088
- Report Number(s):
- SAND--92-2169C; CONF-930644--1; ON: DE93002282
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
012000
04 OIL SHALES AND TAR SANDS
040300
99 GENERAL AND MISCELLANEOUS
990200
BLAST EFFECTS
COAL
COMPUTERIZED SIMULATION
D CODES
DENSITY
DRILLING, FRACTURING, AND MINING
EXPLOSIVE FRACTURING
LAYERS
MATHEMATICS AND COMPUTERS
MINING
MOTION
NUMERICAL SOLUTION
OIL SHALES
POISSON RATIO
RESERVOIR ROCK
ROCK MECHANICS
THICKNESS
TWO-DIMENSIONAL CALCULATIONS
YOUNG MODULUS