FIELD: mining industry.
SUBSTANCE: method includes opening of deposit up to lowest horizon, preparation and extraction of deposit by coaxial chambers in ascending order with forming stable geomechanical system by means of constructing inter-chamber, combined barrier blocks and closing of remaining hollows by means of liquidating filler. Therefore, deposit at bounds with water-isolating ceiling is last to be extracted . Inter-axis space even at all levels is selected on basis of condition, that space between chambers of higher floor is no greater than maximum allowed stable width, and on lower level space is no less than minimal allowed technological width.
EFFECT: lesser possibility of waters influx into mines and reliable support of above-lying rocks and earth surface.
4 dwg
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