FIELD: geotechnology. SUBSTANCE: antifiltering layer is formed in working and perforated pipe-line is put on it. Then pile of rocks with cupped surface is formed. In winter reagents under mode of absence of space waters are fed into pipe-line. In this case reagents in the form of films migrate upwards under action of temperature coefficient and leach metal. Metal-bearing solutions fill surface cup. Concentrated reagents are used for this purpose. EFFECT: improved efficiency of process. 2 cl, 1 dwg
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