Improvement of sub-level caving mining methods during high-grade iron ore mining

Purpose. To improve of the sub-level caving mining methods during deposits high-grade iron ores by applying a rational mode and intensifying ore drawing. Methodology. It included an analysis scientific literature, design documentation practice iron-ores in complex geomechanical conditions deep horizons mines, to establish formation fundamentally new foundations scientific-and-design solutions for extraction minerals; numerical (application special computer software package PFC 3D) physical (based on application volumetric models equivalent materials) modeling drawing, aimed at identifying regularities recovery process depending mining-geological deposits, also physical- and-mechanical properties loosened mass. Findings. Regularities changes qualitative quantitative percentages intensity drawing physical-and-mechanical have been established using simulation. The obtained made it possible substantiate parameters structural elements technological scheme delivery ore. A linear-alternating condition was developed, which will ensure increase pure up 10% and, as result, 4.6% 5.2% indicators percentages, well 1.5% absolute quality mined Originality. Power-law dependencies change angle tapping ultimate strength uniaxial compression volume figure, when is applied, height collapsed layer compression. Practical value. has implementation makes eliminate human factor while observing planograms.