MINING METHOD FOR STEEP ORE BODIES Russian patent published in 2008 - IPC E21C41/22 

FIELD: mining industry.

SUBSTANCE: said method implies development and temporary drifting, horizon reserves hole drilling down to pillar bottom, hole 13 charging and blasting, loading of dumped ore from the block through loading workings 5. After loading workings drifting, stables 2 are worked out in the block corners, cutting across thickness of the ore body, fanned ring is drilled in the ore body hanger in parallel to the ore body bed. Per single charged fan, which is central as regards to other fans, four empty fans are drilled, after charging and blowing dumped ore is loaded, and then canopy 12 is created in the ore body hanger by stowing the resulting space with consolidating stowing material. After consolidation, block reserves are processed under canopy 12 protection, thickness h of the canopy being determined according to formula: h = L²ρ_"P"/2000σ_"R")sinα, where L - block slip, m; ρ_"P" - canopy material density, kg/m³; σ_"R"- canopy material tensile strength, MPa; α - ore body slope angle, degrees.

EFFECT: said invention provides for less labour intensity and improved output of stoping.

5 dwg