METHOD OF ROOF CONTROL IN FLAT POTASSIUM SEAMS Russian patent published in 1997 - IPC

Abstract RU 2074960 C1

FIELD: mining industry. SUBSTANCE: development and drawing work is performed. Stoping breasts are packed in blocks which alternate with blocks of stoping breasts without packing. Minimal value of width of blocks with packed breasts is taken depending on final setting due to destruction of interbreast pillars and final setting due to filling of domes with roof rock. Stoping breasts without packing are left beyond limits of inner boundary of edge portion of displacement front which would create at packing of all stoping breasts. EFFECT: high efficiency. 1 cl, 4 dwg

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RU 2 074 960 C1

Authors

Papulov L.M.

Artemov V.G.

Chelpanova E.V.

Dates

1997-03-10—Published

1994-07-27—Filed