Lumped mass modeling of overburden motion during explosive blasting
The in situ extraction of oil from most oil shale beds is highly dependent upon explosive fracturing and rubbling of rock in a controlled and predictable manner. Besides the rubbling requirement, it is also important that the surrounding rock remain competent to minimize fluid leakage during processing. For rubbling concepts in which the overburden is explosively lifted to provide the required void in an oil shale zone, an engineering lumped mass model has been devised to describe the motion of the overburden. The model simulates the overburden as an array of interacting lumped masses which are loaded from below with a time-dependent force to approximate the explosive load. Correlation with experimental data obtained from field blasting operations shows that this model will provide an adequate approximation of overburden behavior. The basic features of the model are described in the report along with the correlations with field data. Results from several parametric studies are also presented which were used to aid in blast design. This lumped mass model can be extended to include other parameters and has potential for the study of other related blasting situations.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6672431
- Report Number(s):
- SAND-80-2413
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
COMPUTER CODES
I CODES
EXPLOSIVE FRACTURING
OIL SHALES
OVERBURDEN
COMPUTERIZED SIMULATION
IN-SITU RETORTING
ROCK MECHANICS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMMINUTION
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FRACTURING
FUELS
IN-SITU PROCESSING
MATERIALS
MECHANICS
PROCESSING
RETORTING
SIMULATION
040401* - Oil Shales & Tar Sands- In Situ Methods
True & Modified
580300 - Mineralogy
Petrology
& Rock Mechanics- (-1989)