FIELD: mining industry. SUBSTANCE: this relates to hydraulic filling of worked-out space at underground development of stratified mineral deposits by chamber systems. According to method, with purpose of strengthening of interchamber pillars with filling material, second stage of filling is started after settling of filling material of first stage by 1-1.5% and is terminated not later than initiated is stage of progressing creeping in pillars. Application of aforesaid method enhances role of filling material as component of development system and accelerates its involvement in operation for strengthening of roof supporting pillars and it correspondingly allows for increasing extraction of ore from mine due to reduced width of pillars. EFFECT: higher efficiency.
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