METHOD FOR EXTRACTING A BED OF SHALE Russian patent published in 2006 - IPC E21C41/16 

FIELD: mining industry, possible use for underground extraction of mineral resources, for example, shale from Baltic shale basin.

SUBSTANCE: method includes driving ventilation, intake and lateral galleries for contouring panels, extraction of which is performed by driving long chambers while leaving inter-chamber ribbon blocks. Contouring and chamber mines are extracted selectively with extraction of shale by cuts and cutting of rock blocks of given dimensions and shape. after driving of first chamber simultaneously with extraction of second chamber inter-chamber ribbon block is formed from rock layer left in it during selective extraction of shale with addition of cut rock blocks from first chamber, then column-shaped blocks are stacked in first chamber using cut rock blocks of this chamber and contouring mines. Then process of extraction of next chambers in contoured panel, generation of inter-chamber of column-shaped blocks is repeated.

EFFECT: decreased shale losses during absence of movements and deformations of undermined rock massif, earth surface.

3 dwg