Radiographic study of the initial stage of development of an underground explosion in sandy soil

Development of the cavity when a spherical charge is detonated in a solid medium

“…The time for breakout of the gases was much greater, and consequently the boundary conditions had no appreciable influence on the final dimensions o f the cavity. For comparison we note that the final cavtry radius in sodium chloride, 1.6SRch, found in [3], shows satisfactory agreement with our present value. The c o mparison was made on the basis that the strength characteristics of NaC1 are similar ro those of Plexiglas.…”

“…The aims of this work were m develop a method of experlmenml Investigaffon, further study of the physical essence of the phenomena occurring near r_he explosion, and in particular determination of the changes in the position of the inmrior walls of the cavit 7 and their maximum radial deviation from ~elr initial position.Demnatlon of spherical charges and the consequent formation and development of a cavity in media possessing mechanical strength were first studied in/he USSR by the x-ray method [2,3].This merlin d of recording rapid processes, especially those near an explosive charge, is in our o pinion the most promising one, and the experimental data accumulamd by ntis means are very useful Method of Investiyarlon. The kinemaffc paramemrs of the development of a cavity around a charge chamber in dynamic condilJons were registered by means of x-rays.…”