FIELD: mining.
SUBSTANCE: method consists in maintaining the stable state of worked-out area with inter-chamber support pillars; at that, sizes of inter-chamber support pillars are determined from actual pressure of rocks on them, which are located inside the natural arch in its final position, and the pillar located at the joint of natural arches is determined considering the pressure on abutments of arches of those rocks which are located above the outlines of natural arches.
EFFECT: reducing the losses of developed mineral resources and improving the safety of mining operations.
2 dwg
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RU2074960C1 |
