METHOD OF ICE COVER DESTRUCTION AND DEVICE FOR ICE COVER DESTRUCTION

摘要

FIELD: blasting operations.;SUBSTANCE: explosive charges are placed under the ice and undermined in sequence with the time interval equal to the time of passage of flexural-gravitation wave from the place of undermining the previous to the place of undermining the subsequent charges. Above the ice cover the explosive charges are placed and undermined simultaneously with undermining the charges placed under the ice cover. At that, before the placement of the explosive charges the speed and direction of wind, undercurrents and drifts of ice fields is measured, the thickness of ice is determined. The explosive charges are placed with the formation of the direction of propagation of the blast wave in the opposite directions from the location of marine object of economic activity. The watercraft influencing the ice cover is equipped with a source of gas and a system of its supply with a collector and comprises a cable-rope, the other end of which is connected through the electromagnetic breaker with the ballast. The charges are placed in watertight casings made in the form of a ball. The cable-rope is connected to the balls by the fuse lighter. The charges are made in the form of the volume-detonating mixture.;EFFECT: increase in reliability of protection of marine objects of economic activity.;2 cl, 2 dwg