FIELD: coal mining.
SUBSTANCE: invention relates to coal pillars extracting technology, in particular in chamber mining using internal filling. The method includes the following steps: 1) dividing coal pillars during chamber mining into external retained pillars and internal removable pillars, opening a slot on the side of said retained pillars; 2) clearing production of the recoverable pillar through the gap on the retained pillar; 3) closing the gap on the pillar to be left after the completion of the extraction of the recoverable pillar, filling the goaf, surrounded by the whole, cement filling material; 4) support of the overburden strata with cement backfill material after its stabilization instead of the coal pillar, cleaning production of the retained pillar.
EFFECT: higher rate of resource extraction ensured.
5 cl, 6 dwg
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