SUSPENDED WELL STEM Russian patent published in 2020 - IPC F42D1/08 F42D1/18 

FIELD: soil or rock drilling; mining.

SUBSTANCE: invention relates to mining, namely to drilling and blasting operations in rocks, and can be used in various industries, which use blasting operations in rock massifs, in particular, in open mining of minerals. Suspension well stem includes supporting structure exceeding diameter of wellhead, and suspended part fixed by flexible link on support structure. Suspended part is made in the form of composite cylinder composed of two halves interconnected by temporary connection with skewed ends towards each other. Each end of each half is straight, and the other end is bevelled. Time link is made in the form of a pin installed in the hole passing through both halves of the composite cylinder along its vertical axis with the possibility of free movement of the pin along the vertical axis of the hole.

EFFECT: technical result is intensification of rock crushing process, reduced specific consumption of explosive, higher quality of crushing rock mass, simplified design, increased efficiency and reduced prime cost of blasting operations.

1 cl, 4 dwg