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In modern mining a tendency is observed to extend underground development of near open-pit reserves in thick ore deposits because of increase of open-pits ready to complete open mining operations or technical elimination. Researchers of Mining Institute KSC RAS have established that when developing the near open-pit reserves by mining systems of ore and country rock caving, the parameters of ore excavation and mining safety increase due to controlling ore drawing and constructing a thermal insulating layer. The ma...