Calculational Support for the 'No Excuses' KLOTZ Club Test at Linchburg Mine

High resolution calculations have been performed to simulate the detonation and subsequent blast propagation of 37.3 kilograms/(cubic meter) (TNT equivalent) of Comp B in an underground complex of chambers and tunnels like that of the Linchburg Mine near Magdalena, New Mexico. Tests were performed in this complex by the U.S. Army Water-ways Experiment Station (WES) in support of a joint US/ROK program and also for the KLOTZ Club. The calculations were performed with S-Cubed's second-order, general-purpose Eulerian hydrocode, SHARC. Because of the importance of replicating a complex facility with high fidelity so that accurate predictions of blast waveforms can be made, not only within the detonation chamber and in nearby access tunnels, but in other chambers and at the remote mine portal, the calculation was undertaken in several stages. The first stage was a two-dimensional representation, in Cartesian coordinates, of the explosive detonation and surrounding chamber. For propagation throughout the complex, a two-dimensional Cartesian "plan view" representation was used. Finally, a two-dimensional cylindrical simulation was used to propagate the blast signal to the mine portal. Careful representation of grid-scale roughness elements of the mine walls were incorporated into the calculation. The calculations are described, and results, in the form of station plots of measurable hydrodynamic parameters, are shown. The test was performed on 26 May, 1994. Limited, penitentiary comparisons between calculated and experimental results are made.
See also ADM000767. Presented at the Department of Defense Explosives Safety Seminar (26th) held in Miami, Florida on 16-18 August 1994. Published in the Proceedings of the Department of Defense Explosives Safety Seminar (26th), 1994.