OPEN-UNDERGROUND MINING OF COAL SEAMS Russian patent published in 2014 - IPC E21C41/00 

FIELD: mining.

SUBSTANCE: proposed method comprises construction of work sites to inclined openings are made along boundaries of every board to depth of pit contour line. Required depth reached, drifts are cut from inclined openings of work site No. 1 at 90 degrees towards inclined openings of work sites No. 2 for them to be combined to erect the pumping. Deposit is worked by long opening shafts by heading-and-winning machine. Working of all openings is carried out by heading-and-winning complex. Belt slope and mounting-dismantling slope are worked from pit board from work site No. 1. Belt slope and mounting-dismantling slope are worked from pit board from work site No. 2 with a certain delay. After combining the drifts with inclined openings of work sire No. 2, heading-and-wining complex is reconfigured and completed. Then, deposit is mined by long opening shafts in ascending order. Said shaft is worked by short faces in pillarless mining, alternatively, in forward and reverse runs with formation of vent-conveyor break-offs guarded by pillar with timbering.

EFFECT: higher coal yield.

4 cl, 1 dwg