SUSPENDED BOREHOLE STEM Russian patent published in 2022 - IPC F42D1/08 F42D1/18 F42D3/04 

FIELD: mining.

SUBSTANCE: invention relates to mining, to the field of drilling and blasting operations in rocks and can be used in various industries using blasting operations in rock massifs, in particular, in development of minerals by open method. Suspended well stemming comprises support structure larger than diameter of wellhead, and suspended part fixed by flexible link on support structure. Suspended part is made in the form of an inclined solid cylinder, the height of which is 15–35 % greater than the well diameter, and its side surfaces are skewed parallel to each other so that the diagonally opposite halves on the upper and lower ends of the cylinder are rounded in accordance with the well walls. In the upper part of the inclined solid cylinder, a corrugated elastic material is fixed with a permanent flexible link, the length of which is more than the height of the solid cylinder.

EFFECT: increased efficiency of well stemming.

1 cl, 3 dwg