METHOD OF COMBINED DEVELOPMENT OF CONTIGUOUS FORMATION OF DIFFERENT THICKNESSES Russian patent published in 2014 - IPC E21C41/00 E21C41/20 

FIELD: mining.

SUBSTANCE: formations are excavated in inverse order in a panel with aligned arrangement of chambers and pillars. Meanwhile the thinner formation is excavated by chamber-and-pillar system with regular cutting of inter-chamber belt pillars by break-throughs towards the front of pillar mining, meanwhile a ventilation of a working zone and dust air removal is performed due to mine ventilating pressure drop through the last inter-chamber break-through, and the thicker formation is excavated by chambered system with lagging from the thinner formation.

EFFECT: improvement of performance of excavation of thinner formations due to increase of extraction of minerals from subsoil by regular cutting of interchamber pillars and ensuring of efficient ventilation and dust removal from a working zone of operators of winning machines and self-propelled transportation equipment into excavated space.

2 cl, 4 dwg