METHOD OF LAYER MINING OF THICK FLAT COAL BED Russian patent published in 2013 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: method of layer mining of thick flat coal beds includes separation of a bed into layers, separation of layers into mineral columns, mining of layers with long working faces in descending order, leaving a layer-to-layer pack, with arrangement of developing ventilation and travelling roadways of the upper layer, leaving column-to-column pillars. Preparation of the mined layer of the extracted bed is carried out in pair mines, namely, with an area ventilation mine and an unloading mine near the ventilation one, an area conveyor mine and an unloading mine near the conveyor one, and unloading mines are tunnelled without supporting, outstripping the area mines, at the same time the distance between pair mines and the value of bottomholes outstripping of the unloading mines above bottomholes of area mines is determined according to formulas.

EFFECT: increased stability and manufacturability of mines arrangement in a mined layer, reduced losses of minerals when mining lower layers.

2 dwg