METHOD OF MINING THICK STEEP DEPOSITS OF UNSTABLE ORES Russian patent published in 2010 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: proposed method comprises dividing ore body into layers to be mined in descending order, making layers starting heading, extracting ore in pulls and flushing the pulls by hardening materials. In extracting the pull first layer, ore cross extension is developed, while lengthwise axes of pulls in the second and next layers are arranged at an angle to lengthwise axes of breakage pulls driven in above-located layers. Second and next layers are excavated under filling mass with permanent lag from filling mass boundary in above-located layer that is defined from claimed expression. In using the same starting preparatory workings, drifts or orts, in adjacent layers, angle between lengthwise axes of pulls is defined from the claimed expression. In using unlike starting preparatory workings, drifts or orts, in adjacent layers, angle between lengthwise axes of pulls is taken to equal 45-90°.

EFFECT: higher safety of mining, lower costs.

3 cl, 3 dwg