UNDERGROUND MINERAL MINING METHOD Russian patent published in 2007 - IPC E21C41/16 

FIELD: mining, particularly methods of underground mineral mining.

SUBSTANCE: method involves performing second working in two stages. The first stage includes forming contouring artificial massif having constant width or width changing towards outer border thereof along ore body perimeter or along ore body zone to be prepared for further second working. The second stage involves dividing resources defined by contoured zone into excavation units by forming artificial dividing massifs. The third stage includes cutting excavation units with the use of technologies utilizing forced ore separation from massif or uncontrolled mineral caving. Cutting order provides straight line of second working movement in area under excavation, wherein the line is defined by diagonals of two or more simultaneously cut excavation units in plane view. In the case of mineral mining in zones characterized by instable ores and rock protective layer having predetermined shape is created at upper undercut level over each excavation unit. In the case of reservoir filled with pressure fluid presence in surrounding rock forming of contouring artificial massif is accompanied by creation of water-tight diaphragm extending from massif border into rock body.

EFFECT: creation of conditions favorable for high-performance mining system usage, as well as increased mining safety and efficiency.

6 cl, 8 dwg