METHOD FOR CONDUCTING OF DRILLING AND BLASTING OPERATIONS (MODIFICATIONS) Russian patent published in 2007 - IPC F42D3/04 F42D1/08 

FIELD: drilling and blasting operations in industry and construction, applicable at charging of deep-holes of any degree of water soaking by industrial explosives.

SUBSTANCE: the method consists in drilling of deep-holes, charging of them by cartridge charges, in which each cartridge 2 consists of several cylindrical elements 1, 11 of an explosive of one or different diameters produced of the same height from a single one-or multi-layer waterproof polymeric hose 2 by pinch 7 of it with the length of hose 8 between cylindrical elements 2 at least of one hose diameter with hermetically sealed ends assembled in a bundle in height, and placed in polymeric water-permeable shell 3, whose ends are assembled in "borlock" 4 and fastened. An the second modification cylindrical elements 1, 11 are made of hoses 2 of different diameters, cylindrical elements 1 of the larger diameter are made of a waterproof polymeric hose, and cylindrical elements 11 of the smaller diameter equal to the diameter of the inscribed circle formed by the cylindrical elements of the larger diameter are made of waterproof polymeric hose and located in the central duct between cylindrical elements duct between cylindrical elements 1 of the larger diameter, or in the central duct between cylindrical elements 1 of the larger diameter and in their periphery, or in the periphery of cylindrical elements 1 so that they come in contact in height with cylindrical elements 1 of the larger diameter.

EFFECT: provided charging of watersoaked deep-holes by cheap ammonia nitrate explosives with a density of less than 100 kg/cu.m.

7 cl, 2 ex, 18 dwg