FIELD: mining.
SUBSTANCE: claimed process comprises drilling the vertical main working pit from the surface behind the zone of bearing strata shift and the blind main pit to exposure of the deep beds with transfer of ore lifted via underlying blind pit into accumulation bin and skips of overlying working pit. The blind pit of the second turn of exposure is communicated with the surface by the well drilled to the haulage level. Lifting machine rope is passed through the well to secure the lifting vessel thereat displacing at elevation marks of the second ox the next of deposit exposure stages while the well diameter is taken to make at least 10 diameters of the lifting machine rope.
EFFECT: reduced terms of capital works, higher safety of exposure.
1 dwg
