SALINA DEVELOPMENT METHOD Russian patent published in 2011 - IPC E21C41/20 

FIELD: mining.

SUBSTANCE: method involves execution of uncovering developments - capital transport and travelling slopes -to the lowest horizon; performance of ventilation and bottom gangways of the lower floor; performance of block transport and side slopes within each extraction section; penetration along the strike of chamber passways and development of deposits of the block and backfilling of chambers with washery refuse. Chamber backfilling is performed with delay from cleaning excavation by one or two chambers through the wells drilled from stowage slopes passed from ventilation gangway. Thickness of roof pillar is determined depending on thickness of load-carrying layer, bending strength of the rocks which are included in it, and width of chamber bay.

EFFECT: increasing salt extraction efficiency and safety; simplifying the technology providing ecological purity of environment.

2 dwg