DEVICE FOR FORMING DIRECTIONAL CRACKS Russian patent published in 2007 - IPC E21C37/12 

FIELD: mining industry, possible use for creating cracks to extract valuable crystalline resources and natural stone, removing blockages and structures, splitting of lumps.

SUBSTANCE: device includes cylindrical body with axial aperture and plunger inserted into aforementioned aperture. Cylindrical body is made in form of a barrel, and plunger is mounted with possible longitudinal movement up to a stop against barrel bottom. Circular shelf is made on the end of plunger. A ring is pinned onto plunger, ring having internal diameter less than diameter of circular shelf, and is held on open end of barrel. Load is held on the end of plunger free of barrel, for example, metallic cylinder with handles. A spring is pinned onto plunger between load and ring.

EFFECT: increased efficiency of device operation due to increased impact load without additional equipment, expanded area of possible use due to possible creation of directional crack without well drilling.

3 cl, 2 dwg