Mass explosive works in mining and construction are traditionally performed in the mode of short-delayed detonation. This regime during a group explosion creates a complex and relatively long-lasting system of postcritical dynamic stresses in the rock massif. Within the destroyed block, these dynamic phenomena create a complex interference pattern of direct incident and reflected waves. This initial phase of the explosive process is believed to be only preparatory. In the complex process of forming the mechanical effect of mass detonation of charges with millisecond delays, the wave phase passes into the phase of crack formation.
