Alteration of the permeability tensor around a grouped explosion

Conclusions The results derived in the paper indicate that the permeability of the medium deteriorates along a straight line connecting the chamber centers. At the same time, the components k_r and k_ω of the permeability tensor increase. This gives a new confirmation to the conclusion made earlier that infiltration flows between spherical cavities will be practically absent along the shortest distance, and that the hydrodynamic connection between the cavities will occur through areas marked by circled minuses in Fig. 4. Our calculations thus indicate that the distribution of permeability factor near the destruction zone of confined explosions is a rather complex function of three-dimensional coordinates, described qualitatively in Fig. 4 (the increase and decrease areas). This distribution of is bound to affect the pattern of infiltrational interaction of the destruction zones and should be taken into consideration when planning a cluster blast. Institute of Engineering Physics, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 43–50, September–October, 1985.