Methods of improving disintegration of rock mass and methods of improving technologies of conducting material ejecting explosions, including directional explosions, have been developed. The study of the mechanics of energy transfer from the explosive to the surrounding medium in the initial phase of reciprocal interaction of detonation products and explosion bore, conducted by high speed filming at 200 frames per second, allows the development of recommendations for explosion energy transfer to the surrounding medium, which, consequently, leads to improving explosion effectiveness. This is achieved by regulating time-wise characteristics of the explosion impulse, both by repeated stressing of exploding parts of rock mass in various points in horizontal and vertical planes, through explosions of charges at different times, and by using varied construction of explosive charges, which also increases ejecting charge performance. Furthermore, parameters of explosion impulse may be also regulated through the use of specially composed explosive charge mixtures of optimum characteristics, designed for specific technological tasks. Particular attention has been given to studying the construction of explosive charges with air bags, as ar bags, as a means of increasing ejecting charge performance in creating open excavations. Optimal volume values of air containers and the rate of relationship of the placement depth of cylindrical horizontal explosive charges to the parameters of explosion waves have been determined. Some schemes of conducting explosion works ensuring direction of material ejection with simultaneous decrease of use explosive use by 20 to 30 percent have been discussed.
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