METHOD OF REFINEMENT OF DEEP KIMBERLITE QUARRIES Russian patent published in 2018 - IPC E21C41/26 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and is created with reference to the development of deep kimberlite quarries in the extreme climatic conditions of the permafrost zone of the North. Method comprises the construction of a high vertical bench along the contour of the tube with preliminary pre-splitting, the strengthening of the proximal rock mass with cable ties from the underground excavations through the wells, shipment of diamond-bearing ore with its transportation using the motor vehicles through the spiral stems to the concentrating mill. Moreover, the spiral stems in the completion area pass from the side of the pit, while for working off the side pillars at a certain distance from the vertical slope, the annular horizontal excavation is constructed, the slope is strengthened with the cable ties, where the ties are located along and across the vertical bench, placing the prism of a possible collapse into the rope basket, which is fixed in the annular working with the cables to the channels, and transportation of ore is carried out both through the exits, which traverse along the ore body, and through the spiral workings with temporary storage of part of the ore at the site during the completion of ore exits.

EFFECT: technical result is the increased efficiency of refinement of kimberlite quarries under the conditions of transition to the development of reserves of deposits by means of the underground method.

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