The present invention relates to a method for sorting and utilizing
coal and rock for a
coal and rock combined mining face, and is especially applicable to the sorting and utilization of
coal and rock mined from a coal and rock combined mining face when an extremely thin coal seam is used as a protective layer in combined mining of multiple coal seams. Underground
gangue transport, storage and filling systems are directly established underground to convey a large amount of coal and
gangue mined from the coal and rock mining face to an underground sorting and washing chamber for efficient separation of the coal and the
gangue, sorted gangue is crushed and then filled in a mined-out area of a protected layer, thus realizing the environment-friendly
cut and fill mining of the protective layer while the gangue is not lifted, and effectively preventing the
ground subsidence caused by combined mining of multiple coal seams; sorted middlings are conveyed to a gangue power
plant on the ground for power generation through a main conveying
system, so that the pressure on mine coal quality is alleviated when benefits are created in the power
plant, and thus the average ash content of commercial coal is reduced, and the selling price is increased. The method provided by the invention realizes the efficient utilization of coal and rock while realizing the efficient separation of coal and gangue, and has remarkable economic and
social benefits and excellent promotional value.