SOME UNDERGROUND EXPLOSION RELATED ISSUES

V. A. Batalov, S. M. Bakhrakh, B. A. Klopov, N. P. Kovalyov, E. E. Meshkov, V. N. Mokhov, I. N. Pavlusha, A. V. Pevnitsky, V. A. Sarayev, V. P. Sevastyanov, V. I. Tarasov, Yu. V. Yanilkin, M. S. Samigulin
Vant. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1978. Вып.2. С. 30-36.

      In order to study and numerically simulate the mechanics of an underground explosion a continuum model is considered, taking into account compressibility, elastic/plastic properties, initial porosity, destruction, heat conductivity, and turbulent effects. Appropriate algorithms and programs are written to solve both 1-D and 2-D (axisymmetric) problems. General laws, defining a containment cavity formation including, in particular, the medium parameters impact on the cavity size are estimated. Burst product and ground motion due to the explosion with nonspherical initial geometry are studied.
      A comparison between 2-D calculation and the U.S. Marvel experiment is made. Some laboratory experiment and 2-D calculations results are given, which show a channel collapse effect occurring in the case of explosion with such initial geometry.