METHOD FOR OPEN-UNDERGROUND MINING OF HEAVY SLOPE COAL BED Russian patent published in 2013 - IPC E21C41/00 

FIELD: mining.

SUBSTANCE: method includes erection of a working site at a cut board ledge; or its bottom along a line stretching at the level of the bed soil, assembly of mobile facilities for clearing works mechanisation, extraction of coal with these mechanisation facilities aside from the working site by arrangement of parallel extraction chamber of rectangular cross section, leaving commensurate chamber-to-chamber pillars, discharge of the broken coal along the mine to the working site and its loading into a vehicle or to a temporary warehouse. Previously a diagonal slope is arranged in the layer near the bed roof, which near the border of the coat cut mining allotment is turned along the bed stretching line, i.e. converted into a drift equal to the slope in section and similar in fixation. Then in a similar manner the extraction chamber is arranged until it is coupled with the drift, afterwards coal is extracted in diagonal stopes at the side of the bed rise, cutting stopes at the angle of 120…135 degrees to the axis of the chamber, measured from its head. The length of the stope is accepted as not more than the length of the combine, and security pillars are left between stopes with the width approximately equal to the width of the stope. The coal broken in stopes is transported with a self-propelled car along the extraction chamber to the working site.

EFFECT: invention makes it possible to increase safety and efficiency of mining.

2 cl, 2 dwg