METHOD FOR INTEGRATED DEVELOPMENT OF COAL DEPOSIT AREA Russian patent published in 2009 - IPC E21C41/18 E21B43/295 

FIELD: mining.

SUBSTANCE: method for integrated development of coal deposit area includes preliminary methane drainage of seams, opening-up and development of a mine by means of establishing a network of opening and developing mine workings with total inclination towards main shafts to arrange gravity-flowing water discharge, delivery of required amount of air to provide forced ventilation in one direction, coal cutting and transportation of broken-down coal to the surface along the said mine workings. While coal cutting works being developed, a part of mine workings in the mined-out area of mine field is being maintained until the end of mining thereof. Coal mining being finished, protective pillars, mining losses and substandard coal reserves are burned down under ground. After coal firing in the mine field, remnants of gaseous products are concentrated in the upper horizon of mine field by means of filling the entire worked-out space with water solution of reagents. Gaseous products of underground firing are trapped at the upper horizon of mine field and after extinguishing source of underground firing, productive solution is pumped out of shaft sump. Productive solution is directed to extraction of valuable and (or) toxic elements, multiple filling of the worked-out space with water solutions of reagents and pumping thereof being performed with change of reagent if necessary.

EFFECT: increased efficiency and environmental safety in development of coal deposit area.