RU2455189C2 - Method to break ice cover - Google Patents

Abstract

FIELD: blasting.

SUBSTANCE: invention relates to breaking an ice cover with the help of an explosion. The method to break an ice cover is carried out by creating a gas cavity with high pressure under the lower ice edge. The cavity is created by firing at an ice cover from a weapon with the main hollow-charge shell with tandem arrangement of two composite hollow-charge shells capable of alternation ignition with a time interval. It is reasonable to install the weapon barrel at the angle providing for vertical fall of the shell on ice.

EFFECT: invention makes it possible to increase efficiency of ice cover damage, to ensure safety of blasting and to reduce costs for their realisation.

2 cl

Description

The invention relates to blasting operations to destroy the ice cover.

The prior art is known from a method of destroying an ice sheet by creating a gas cavity under ice using a gas generator. To increase the pressure in this cavity, an explosive charge is placed under the ice, which is then blown up (1. RF Patent No. 2193751 C2, 7 F42D 7/0, ЕOВВ 15/02 dated November 27, 2002 Bull No. 33).

The disadvantage of this method is the need to perform sapper work and install a gas generator under the ice.

The essence of the invention is to increase the efficiency of the destruction of the ice cover.

The technical result obtained by carrying out the invention is to simplify and reduce the cost of blasting technology.

The essential features characterizing the invention

Restrictive: creation of a high-pressure gas cavity under the lower ice edge.

Distinctive: the cavity is created by shelling the ice cover from the cannon with a main cumulative projectile with a tandem arrangement of two cumulative charge components capable of alternately igniting at a time interval, while the gun barrel is set at an angle that ensures vertical projectile incidence on ice.

The achievement of the required technical result is achieved due to the formation of a gas cavity with high pressure, not as a result of the operation of the gas generator and detonation of the explosive charge, but as a result of the explosion of the first cumulative projectile.

The method is as follows.

Cumulative shell by artillery shelling of the ice cover is delivered to the right place. When detonating an explosive, the first charge by a cumulative jet creates a through hole in the ice sheet. After a certain time interval, the second charge explodes, and the cumulative stream from it rushes into the hole created by the first charge (2. http://www.rbs.ru/vttv/99/firms/appiphys/r-opkums.htm). In this case, the power of the first charge should provide a cumulative and high explosive impact, and its caliber should be sufficient for punching a hole in the ice sheet, penetration of explosion products and a second charge through it. After the formation of a gas cavity under ice due to the products of the explosion from the first charge, the second charge explodes, which will lead to the creation of a shock wave under ice with high pressure (200-250 thousand atmospheres and a temperature of 6000-7000 ° C. 3. http: / /www.piritek.info/Weapons/boepripasu.htm, 4.http: //otvaga2004.narod.ru/publ_w5/012_myth.htm). As a result, an additional intense vaporization of an explosive nature will occur under the ice sheet, which will cause more effective destruction of ice compared to its analogue.

Claims (2)

1. A method of destroying an ice sheet by creating a high-pressure gas cavity under the lower edge of the ice, characterized in that the cavity is created by shelling the ice sheet from the gun with a main shaped-charge projectile with a tandem arrangement of two cumulative charge components capable of alternately igniting at an interval of time. 2. The method according to claim 1, characterized in that the gun’s barrel is installed at an angle that ensures the vertical drop of the projectile on ice.