LEVEL-WISE METHOD FOR PREPARING MINE BEDS, THIN AND ONES OF AVERAGE THICKNESS, WITH EXTRACTION OF FACES IN ASCENDING OR DESCENDING ORDER Russian patent published in 2007 - IPC E21C41/18 

FIELD: mining industry, possible use for preparing and extracting thin and averagely thick beds.

SUBSTANCE: method includes preparation of active and new levels, and preparation of long extracting columns between aforementioned levels, and processing of columns with faces on basis of given technological angles, mounted on basis of geological or technical factors. For mine beds with alternating location angles ranging from 0° to 35° mines are made adjacent to face with alternating angles of rise and dip, along curvilinear or in combination of curvilinear and rectilinear routes so that angle of their rise or dip would not exceed the given technological angle. Columns are extracted by faces at given technological angles, while in case of change of bed position angles in deposit and hardness of side rocks faces are turned synchronously with aforementioned mines so that dip and rise angles during their movement would not exceed given technological angle. Unbroken ribbon conveyor is used with suspension line, which is assembled in mines adjacent to face, bending it in horizontal and vertical planes. As transport for auxiliary operations in aforementioned mines adjacent to face, monorail road or pneumatic machine transport is used.

EFFECT: increased recovery of coal, simplified delivery of people, materials and equipment during elongation of extracting columns.

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