The technique of researches of geomechanical condition of stone massif in dynamics of development of coal-face operation of rich copper-nickel ores of deposit С-1 in especially difficult mining-geological conditions of deep mine "Skalisty" of Transpolar Division of JSC “MMC «Norilsk nickel» is shown. The stress condition is investigated by method of disking of drill-hole cores in characteristic zones of a developed massif. Results of researches are a basis for designing of technologies and directions of clearing works, and also preventative of preventive protective measures at by development of deposits on the big depths in difficult geomechanical conditions.