Recommendations on ore drawing methods to minimize losses due to ore mass re-freezing in the stoping zone

<jats:p>The article presents recommendations on an efficient method for ore drawing from a block under various temperature and humidity conditions of underground mining of deposits in the cryolithic zone. The article presents the results of a comprehensive analysis of data obtained during experimental and theoretical studies of the effects caused by the design and technological parameters of the mining method on changes in the ore loss indicators due to its re-freezing during sublevel caving and bottom drawing. Recommendations are presented for an effective technology of sublevel caving and bottom ore drawing, i.e. the mode, draw rate, stope width and height, method of designing the bottom of the block, etc., depending on the humidity, temperature of the rocks and the stope, that would ensure minimal ore losses from its re-freezing in the stope during underground mining of ore deposits in the permafrost zone. General recommendations have been formulated, which application is preferable for any of the mining methods that employ ore drawing under the caved overlying rocks during underground mining of ore deposits in the cryolithic zone. Application of the recommended technological and organizational measures will improve the efficiency and safety of drawing of ore masses prone to freezing inside the stoping zone while ensuring minimal losses and dilution during underground mining of ore deposits in the cryolithic zone</jats:p>