METHOD FOR SELECTIVE MINING OF DIAMOND-BEARING ORES Russian patent published in 2021 - IPC E21C41/26 

FIELD: mining industry.

SUBSTANCE: invention relates to the mining industry and can be used for the development of complex-structured kimberlite deposits containing ores of various values. The method includes drilling wells, delineating sections of the ore massif. At the same time, when the wells penetrate the zone of high-value ores, local thickening of the network of wells is carried out with sampling of drilling material in depth and the subsequent delineation of the zone of ores of high value, and according to the identified intervals of inclusions of ores of anomalously high value, the drilling material is sampled, obtained by cutting circular slots in the near-wellbore space. , contouring in plan and section, followed by drilling out inclusions of ores of anomalously high value with a drilling unit with an annular face along the axis of the identified inclusions of ores of abnormally high value and trimming of drilled core of large diameter, further extraction, transportation, gentle disintegration are carried out. The development of zones of ores of medium value is carried out by mechanical means using an automated positioning system. At the same time, a buffer layer is created along the perimeter of low-value ore zones by drilling wells and high-pressure hydraulic action, the use of shaped charges for explosive loosening of low-value ore zones with coaxial placement of explosives, including an inner cavity with brine, an outer cavity with brine and cumulative cavities, providing the formation of directed flows of the gas-vapor mixture.

EFFECT: invention increases productivity and technological efficiency by ensuring the selectivity of the extraction of kimberlite ores, considering their value, as well as increasing the safety of diamonds during the extraction of kimberlite ores.

1 cl, 6 dwg