FIELD: mining.
SUBSTANCE: operating section of a coal bank is broken into service panels that are drilled in a certain sequence to the bottom of the coal bed with wells of mean and large diameters, and that are in-series developed through the same wells during underground coal gassing so that useful products such as combustible gas, process steam and electric power is obtained, and after coal degassing is completed, useful products such as metal of scandium are obtained from ash and bio gas out of solid domestic wastes buried in the worked-out volume of the panel.
EFFECT: improving development efficiency of an underground coal formation through process wells due to complex use of a heat resource of a coal combustion process, a mineral part of coal ash, and a degassed volume of an underground gas generator.
7 cl, 8 dwg
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