Computer cast blast modelling
- ICI Explosives Canada, North York, Ontario (Canada)
- ICI Explosives USA, Dallas, TX (United States)
- Sandia National Labs., Albuquerque, NM (United States)
Cast blasting can be designed to utilize explosive energy effectively and economically for coal mining operations to remove overburden material. This paper compares two blast models known as DMC (Distinct Motion Code) and SABREX (Scientific Approach to Breaking Rock with Explosives). DMC applies discrete spherical elements interacted with the flow of explosive gases and the explicit time integration to track particle motion resulting from a blast. The input to this model includes multi-layer rock properties, and both loading geometry and explosives equation-of-state parameters. It enables the user to have a wide range of control over drill pattern and explosive loading design parameters. SABREX assumes that heave process is controlled by the explosive gases which determines the velocity and time of initial movement of blocks within the burden, and then tracks the motion of the blocks until they come to a rest. In order to reduce computing time, the in-flight collisions of blocks are not considered and the motion of the first row is made to limit the motion of subsequent rows. Although modelling a blast is a complex task, the advance in computer technology has increased the computing power of small work stations as well as PC (personal computers) to permit a much shorter turn-around time for complex computations. The DMC can perform a blast simulation in 0.5 hours on the SUN SPARC station 10-41 while the new SABREX 3.5 produces results of a cast blast in ten seconds on a 486-PC. Predicted percentage of cast and face velocities from both computer codes compare well with the measured results from a full scale cast blast.
- OSTI ID:
- 398334
- Report Number(s):
- CONF-9401127-; TRN: IM9649%%542
- Resource Relation:
- Conference: 10. annual symposium on explosives and blasting research, Austin, TX (United States), 30 Jan 1994 - 30 Jan 1996; Other Information: PBD: 1994; Related Information: Is Part Of Proceedings of the tenth annual symposium on explosives and blasting research; PB: 313 p.
- Country of Publication:
- United States
- Language:
- English
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