SUSPENDED WELL STEM Russian patent published in 2012 - IPC F42D3/04 E21C37/00 

FIELD: mining.

SUBSTANCE: suspended well stem comprises flat elements and an elastic link. At the same time flat elements are made as two hingedly joined half-discs joined to each other, length of each equals 0.55-0.7 d_w, and width - 0.65-0.9 d_w. At one side each element is rounded, following the well circumference. A rope is fixed to the hinged joint, so that the hinged joint is arranged at the bottom.

EFFECT: higher operational reliability of the device, intensified process of rocks grinding, reduced specific consumption of explosive, higher quality of rock mass grinding, simplified and cheaper design.

3 dwg