SUSPENDED WELL STEMMING Russian patent published in 2019 - IPC F42D1/08 F42D1/20 

FIELD: mining.

SUBSTANCE: invention relates to mining, in terms of blasting operations at open pit mines and is intended for production of well stemming or creation of air gap for production of dispersion of explosive charge in cavity of well in various production and natural-climatic conditions. Suspension well stem is a container made from thermoplastic material, which consists of a housing made in the form of a hollow cylinder closed by a bottom, or in form of a hollow truncated cone on the side of a smaller base, closed by a bottom, and a cover made in the form of a hollow cylinder, closed bottom. On housing, below location of cover, there is an external projection in form of an ellipse, on a small axis of which there are slots for arranging a detonating cord or shock wave tube of a non-electric initiation system in an amount of not less than two, and on its large axis there are holes for attachment of rope in number of not less than two. One section of the rope is attached through the hole to the outer protrusion on the body and to the crossbeam located above the mouth of the well, and another section of the rope is attached through the other hole to the outer protrusion on the body and remains free. Free piece of rope is lowered into well or it is fixed to same crossbar. If necessary, the suspended well core is filled with water, loose or liquid inertizing composition.

EFFECT: invention allows more efficient use of energy of explosion products, simplification of production of well stemming and dispersal of well charge, reduction of harmful effect of dust-gas cloud on environment, improvement of quality and efficiency of blasting operations.

1 cl, 3 dwg