FIELD: mining industry. SUBSTANCE: hole is drilled, casing string is run into hole. Hydraulic monitoring equipment is mounted in hole and enclosing rocks are washed out with output of pulp over pulp-discharge string. Enclosing rocks are washed out in intervals over height of formed technological space. Transfer to due interval is conducted after appearance of clarified water across outlet of pulp-discharge string. EFFECT: widened application field of known method for formation of technological spaces in downcast holes, prolonged operational life of these holes. 2 dwg
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