SUSPENSION WELL STEMMING Russian patent published in 2014 - IPC F42D1/08 

FIELD: blasting operations.

SUBSTANCE: invention refers to mining, to drilling and blasting operations in mine rocks and can be used in different fields applying blasting operations in mine rock masses, and namely at open development of useful minerals. A suspension well stem is made from a piece of material that is bound with two ropes on the outer side; one end of the first rope is bound with a stiff knot, thus forming the first internal volume, inside which a support is arranged. A transverse support size is by 30-50% less than the well diameter. The other end of the first rope is passed inside through the centre of the material piece and attached to a crossbar at the well head. The second rope is bound with a free knot above the stiff knot, with possibility of its movement along the first rope, thus forming the second internal volume, the transverse diameter of which is by 15-20% larger than the well diameter and one third of which is filled with loose inert material; ends of the material piece are left free.

EFFECT: invention allows reducing specific explosive flow, improving crushing quality of mine rock due to long-term arrangement of detonation products in a charging cavity till complete destruction of mine rock, simplifying the structure and improving structure actuation reliability.

2 dwg