SHAFT SUPPORT Russian patent published in 2014 - IPC E21D5/11 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and may be used in construction of shafts in saliferous and saliniferous rocks. A shaft support comprises a bearing inner concrete shell and an outer compensating shell from a pliable foamed material. The compensating shell is formed from polystyrene foam boards and is arranged in a smooth layer around the concrete shell of the cylindrical part of the shaft. The distance between support crowns is defined depending on duration of adhesion of rock salt, inner and outer radii of borders of contact of the support crown with rock salt, an inner radius of the shaft, a safety factor, weight of the support crown, specific weight of concrete, thickness of the concrete shaft support. Support crowns from concrete are reinforced by tubing rings and are separated from the main part of the concrete support by deformation joints from wood, and the compensating shell from polystyrene foam boards is fixed to a rock massif by mounting anchors.

EFFECT: provision of emergency-free operation of a concrete part of a shaft support arranged in creeping saliferous rocks for the rated period of time, and also to increase efficiency of fixation of a shaft due to exclusion of fixation of shafts by an expensive cast iron tubing support.

4 cl, 2 dwg