Blasting induced rock motion modeling including gas pressure effects
- Sandia National Labs., Albuquerque, NM (USA)
- RE/SPEC, Inc., Albuquerque, NM (USA)
A method has been developed to simulate coupled gas flow and rock motion in a blasting situation. The method relies on gas flow calculations using a finite difference Flux-Corrected Transport (FCT) solver and sphere motion calculations using DMC (Distinct Motion Code). The coupling occurs when the porosity field used in the gas flow calculation is calculated using the current positions of the spheres and the flowing gas is used to calculate the loads on the spheres. The example calculation shows that the capability is in place and works reasonably well when compared with field experiments in terms of surface velocities, general rock motion and muck pile shape. Having this capability in place will allow explosive properties to be included in rock motion calculations. Rock motion simulations will be based on the actual physics that occurs in a blast instead of using force-time or velocity-time histories as has been done in the past. A capability that will be added in the near future will allow the viscosity terms to vary with pressure as actually occurs instead of remaining constant. Since very high pressures exist in the blastwell and in its' immediate vicinity this should have a significant effect on the gas flow. It will allow the calculations to be performed with a higher mean particle size which will reduce the heat transfer effects. 11 refs., 13 figs., 2 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5843456
- Report Number(s):
- SAND-91-0107C; CONF-9104227-2; ON: DE91012010
- Resource Relation:
- Conference: 24. oil shale symposium, Golden, CO (USA), 23-24 Apr 1991
- Country of Publication:
- United States
- Language:
- English
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Momentum transfer from flowing explosive gases to spherical particles during computer simulation of blasting-induced rock motion
Momentum transfer from flowing explosive gases to spherical particles during computer simulation of blasting-induced rock motion
Related Subjects
EXPLOSIVE FRACTURING
GAS FLOW
ROCK MECHANICS
ALGORITHMS
CALCULATION METHODS
COMPUTERIZED SIMULATION
FINITE DIFFERENCE METHOD
FLOW MODELS
FRAGMENTATION
PARTICLE SIZE
POROSITY
PRESSURE GRADIENTS
RESERVOIR PRESSURE
RESERVOIR ROCK
SHAPE
SIMULATION
VISCOSITY
COMMINUTION
FLUID FLOW
FRACTURING
ITERATIVE METHODS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MECHANICS
NUMERICAL SOLUTION
SIZE
422000* - Engineering- Mining & Underground Engineering- (1980-)