COMPLEX DEVELOPMENT METHOD OF COAL FIELD Russian patent published in 2010 - IPC E21C41/18 E21B43/295 

FIELD: mining.

SUBSTANCE: invention refers to mining, namely to complex development of coal field during underground coal gasification, and can be used for obtaining underground coal gasification products, heat carrier with specified parametres and for preproduction mining of arsenic. At the well output generator gas is first chilled to a temperature no lower than gaseous arsenic condensation temperature which produces thermal energy for heat supply systems. Then it is washed in water and chilled to a temperature considerably lower than the gaseous arsenic condensation temperature and one regulates condensation of arsenic and compounds thereof which produces a refined gas and a solution of different arsenic compounds. Then the solution of arsenic compounds is subjected to evaporation to produce water vapour and solid arsenic compounds. Then the water vapour is condensed to produce thermal energy for a hot water supply system while the condensate is delivered for gas washing.

EFFECT: invention enables improved efficiency o deposit development and environmental impact reduction.

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