Abstract
The article presents technical solutions for the opening and development of sites of the placer deposits with upper «hanging blocks» in the conditions of the «Obryv-Razvalisty-Promezhutochnyj» placer deposit. According to the experience of the opening workings in placer deposits of the North-East of the Russian Federation, a scheme has been adopted for opening mine fields by inclined conveyor and scraper inclines using access drifts.
The choice of the most rational scheme of mine field preparation in the conditions of the «Obryv-Razvalisty-Promezhutochnyj» deposit is based on many years of experience in underground mining of placer deposits in the North-East of the Russian Federation. According to the results of the analysis, a chamber-longwall method was selected.
The peculiarity of the field, the presence of "upper hanging blocks" and lower blocks on the placer rock bed, determines the interposition and parameters of stopes and inter-chamber pillar.
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