DRILLING FACILITY FOR SHAFT DEEPENING AND METHOD OF SHAFT DEEPENING Russian patent published in 2009 - IPC E21D1/03 

FIELD: mining.

SUBSTANCE: drilling facility for shaft deepening and removing material from shaft consists of at least two platforms, of retractable driven bodies operating between said platforms, which can move one relative to other, of releasable anchor devices interacting with walls of shaft to fix facility in stationary position, and of excavating equipment assembled at lower section of step. Also the said lower section of the step can be axially displaced by means of the driven bodies and by retraction/extension of excavating equipment, in such way facilitating equipment moving off from the bottom of the shaft and performing blasting without displacement of the upper platform. In addition, anchor devices contain pivotally secured and radial extended legs, while extended driven bodies contain a hydraulic operating mechanism.

EFFECT: increased reliability and efficiency of mining in general.

10 cl, 27 dwg