S. K. Andilevko UDC 534.2 The theoretical foundations of the effect of superdeep penetration are considered, a concrete case of loading of an obstacle by a powder flux is calculated, and the calculation data are compared with the available results of a nature experiment. A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 2, pp. 12-18, March-April, 2003. Original article submitted October 21, 2002.